Jepson eFlora: Search Page
Vascular Plants of California
Key to families | Table of families and genera
  Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
 

Scientific Name

You searched for: ""

Scientific NameCommon Name
Abies
  ↳  Key to Abies
FIR
Abies ×shastensis
(Under Abies magnifica var. shastensis)
Synonym
Abies amabilisPACIFIC SILVER FIRNative
Abies bracteataBRISTLECONE FIRNative
Abies concolorWHITE FIRNative
Abies grandisGRAND FIRNative
Abies lasiocarpa var. lasiocarpaSUBALPINE FIRNative
Abies lowiana
(Under Abies concolor)
Synonym
Abies magnificaCALIFORNIA RED FIRNative
Abies magnifica var. critchfieldiiCRITCHFIELD RED FIRNative
Abies magnifica var. magnificaNative
Abies magnifica var. shastensisSHASTA RED FIRNative
Abies proceraNOBLE FIRNative
Abies venusta
(Under Abies bracteata)
Synonym
Abronia
  ↳  Key to Abronia
SAND-VERBENA
Abronia alpinaRAMSHAW MEADOWS ABRONIANative
Abronia crux-maltae
(Under Tripterocalyx crux-maltae)
Synonym
Abronia latifoliaNative
Abronia maritimaRED SAND-VERBENANative
Abronia micrantha
(Under Tripterocalyx micranthus)
Synonym
Abronia nana subsp. covillei
(Under Abronia nana var. covillei)
Synonym
Abronia nana var. covilleiCOVILLE'S DWARF ABRONIANative
Abronia pogonanthaNative
Abronia turbinataNative
Abronia umbellataNative
Abronia umbellata subsp. alba
(Under Abronia umbellata)
Synonym
Abronia umbellata subsp. breviflora
(Under Abronia umbellata var. breviflora)
Synonym
Abronia umbellata subsp. platyphylla
(Under Abronia umbellata)
Synonym
Abronia umbellata subsp. umbellata
(Under Abronia umbellata var. umbellata)
Synonym
Abronia umbellata subsp. variabilis
(Under Abronia umbellata)
Synonym
Abronia umbellata var. brevifloraPINK SAND-VERBENANative
Abronia umbellata var. umbellataNative
Abronia villosaNative
Abronia villosa var. auritaCHAPARRAL SAND-VERBENANative
Abronia villosa var. villosaNative
Abutilon
  ↳  Key to Abutilon
Abutilon crispum
(Under Herissantia crispa)
Synonym
Abutilon palmeriNative
Abutilon parvulumDWARF ABUTILONNative
Abutilon theophrastiVELVET-LEAFNaturalized
Acacia
  ↳  Key to Acacia
Acacia armata
(Under Acacia paradoxa)
Synonym
Acacia baileyanaCOOTAMUNDRA WATTLENaturalized
Acacia cyclopsWESTERN COASTAL WATTLENaturalized
Acacia dealbataSILVER WATTLENaturalized
Acacia decurrensGREEN WATTLEWaif
Acacia decurrens var. dealbata
(Under Acacia dealbata)
Synonym
Acacia farnesiana subsp. minuta
(Under Vachellia farnesiana var. minuta)
Synonym
Acacia farnesiana var. farnesiana
(Under Vachellia farnesiana var. farnesiana)
Synonym
Acacia greggii
(Under Senegalia greggii)
Synonym
Acacia greggii var. greggii
(Under Senegalia greggii)
Synonym
Acacia longifoliaSYDNEY GOLDEN WATTLENaturalized
Acacia lophantha
(Under Paraserianthes lophantha)
Synonym
Acacia mearnsiiBLACK WATTLEWaif
Acacia melanoxylonBLACKWOOD ACACIANaturalized
Acacia minuta
(Under Vachellia farnesiana var. minuta)
Synonym
Acacia paradoxaKANGAROO THORNWaif
Acacia podalyriifoliaQUEENSLAND SILVER WATTLEWaif
Acacia pycnanthaGOLDEN WATTLEWaif
Acacia redolensVANILLA-SCENTED WATTLENaturalized
Acacia retinodesEVERBLOOMING WATTLEWaif
Acacia salignaGOLDEN WREATH WATTLENaturalized
Acacia verticillataSTAR ACACIA, PRICKLY MOSESWaif
Acaena
  ↳  Key to Acaena
Acaena anserinifolia
(Under Acaena novae-zelandiae)
Misapplied name
Acaena californicaNative
Acaena novae-zelandiaeBIDDY-BIDDYNaturalized
Acaena pallidaNaturalized
Acaena pinnatifida var. californica
(Under Acaena californica)
Synonym
Acalypha
Acalypha californicaNative
Acamptopappus
  ↳  Key to Acamptopappus
GOLDENHEAD
Acamptopappus shockleyiSHOCKLEY'S GOLDENHEADNative
Acamptopappus sphaerocephalusRAYLESS GOLDENHEADNative
Acamptopappus sphaerocephalus var. hirtellusNative
Acamptopappus sphaerocephalus var. sphaerocephalusNative
Acanthaceae
  ↳  Key to Acanthaceae
ACANTHUS FAMILY
Acanthogonum corrugatum
(Under Chorizanthe corrugata)
Synonym
Acanthogonum polygonoides
(Under Chorizanthe polygonoides var. polygonoides)
Synonym
Acanthogonum polygonoides var. longispinum
(Under Chorizanthe polygonoides var. longispina)
Synonym
Acanthogonum polygonoides var. polygonoides
(Under Chorizanthe polygonoides var. polygonoides)
Synonym
Acanthogonum rigidum
(Under Chorizanthe rigida)
Synonym
Acanthomintha
  ↳  Key to Acanthomintha
THORNMINT
Acanthomintha duttoniiSAN MATEO THORNMINTNative
Acanthomintha ilicifoliaSAN DIEGO THORNMINTNative
Acanthomintha lanceolataSANTA CLARA THORNMINTNative
Acanthomintha obovataNative
Acanthomintha obovata subsp. cordataHEART-LEAVED THORNMINTNative
Acanthomintha obovata subsp. duttonii
(Under Acanthomintha duttonii)
Synonym
Acanthomintha obovata subsp. obovataSAN BENITO THORNMINTNative
Acanthoscyphus
Acanthoscyphus parishii
  ↳  Key to Acanthoscyphus parishii
FLOWERY PUNCTUREBRACTNative
Acanthoscyphus parishii var. abramsiiABRAMS' OXYTHECANative
Acanthoscyphus parishii var. cienegensisCIENEGA SECA OXYTHECANative
Acanthoscyphus parishii var. goodmanianaCUSHENBURY OXYTHECANative
Acanthoscyphus parishii var. parishiiPARISH'S OXYTHECANative
Acer
  ↳  Key to Acer
MAPLE
Acer campestreHEDGE MAPLEWaif
Acer circinatumVINE MAPLENative
Acer glabrumMOUNTAIN MAPLENative
Acer glabrum var. diffusumNative
Acer glabrum var. glabrumNative
Acer glabrum var. greenei
(Under Acer glabrum var. glabrum)
Synonym
Acer glabrum var. torreyi
(Under Acer glabrum var. glabrum)
Synonym
Acer macrophyllumBIG-LEAF MAPLENative
Acer negundoBOX ELDERNative
Acer negundo var. arizonicum
(Under Acer negundo)
Synonym
Acer negundo var. californicum
(Under Acer negundo)
Synonym
Acer negundo var. interius
(Under Acer negundo)
Synonym
Acer saccharinumSILVER MAPLENaturalized
AchilleaYARROW
Achillea borealis subsp. arenicola
(Under Achillea millefolium)
Synonym
Achillea borealis subsp. californica
(Under Achillea millefolium)
Synonym
Achillea lanulosa subsp. alpicola
(Under Achillea millefolium)
Synonym
Achillea lanulosa var. lanulosa
(Under Achillea millefolium)
Synonym
Achillea millefoliumNative
Achillea millefolium subsp. lanulosa
(Under Achillea millefolium)
Synonym
Achillea millefolium var. alpicola
(Under Achillea millefolium)
Synonym
Achillea millefolium var. arenicola
(Under Achillea millefolium)
Synonym
Achillea millefolium var. borealis
(Under Achillea millefolium)
Synonym
Achillea millefolium var. californica
(Under Achillea millefolium)
Synonym
Achillea millefolium var. gigantea
(Under Achillea millefolium)
Synonym
Achillea millefolium var. littoralis
(Under Achillea millefolium)
Synonym
Achillea millefolium var. pacifica
(Under Achillea millefolium)
Synonym
Achillea millefolium var. puberula
(Under Achillea millefolium)
Synonym
Achlys
  ↳  Key to Achlys
VANILLA LEAF
Achlys californicaNative
Achlys triphylla subsp. triphyllaNative
Achnatherum aridum
(Under Stipa arida)
Synonym
Achnatherum brachychaetum
(Under Stipa brachychaeta)
Synonym
Achnatherum coronatum
(Under Stipa coronata)
Synonym
Achnatherum diegoense
(Under Stipa diegoensis)
Synonym
Achnatherum hymenoides
(Under Stipa hymenoides)
Synonym
Achnatherum latiglume
(Under Stipa latiglumis)
Synonym
Achnatherum lemmonii subsp. lemmonii
(Under Stipa lemmonii var. lemmonii)
Synonym
Achnatherum lemmonii subsp. pubescens
(Under Stipa lemmonii var. pubescens)
Synonym
Achnatherum lettermanii
(Under Stipa lettermanii)
Synonym
Achnatherum nelsonii subsp. dorei
(Under Stipa nelsonii var. dorei)
Synonym
Achnatherum nevadense
(Under Stipa nevadensis)
Synonym
Achnatherum occidentale subsp. californicum
(Under Stipa occidentalis var. californica)
Synonym
Achnatherum occidentale subsp. occidentale
(Under Stipa occidentalis var. occidentalis)
Synonym
Achnatherum occidentale subsp. pubescens
(Under Stipa occidentalis var. pubescens)
Synonym
Achnatherum parishii subsp. parishii
(Under Stipa parishii var. parishii)
Synonym
Achnatherum parishii var. parishii
(Under Stipa parishii var. parishii)
Synonym
Achnatherum pinetorum
(Under Stipa pinetorum)
Synonym
Achnatherum speciosum
(Under Stipa speciosa)
Synonym
Achnatherum stillmanii
(Under Stipa stillmanii)
Synonym
Achnatherum thurberianum
(Under Stipa thurberiana)
Synonym
Achnatherum webberi
(Under Stipa webberi)
Synonym
AchyrachaenaBLOW-WIVES
Achyrachaena mollisNative
Achyranthes lanuginosa
(Under Tidestromia lanuginosa)
Synonym
Achyronychia
Achyronychia cooperiONYX FLOWER, FROST-MATNative
Achyronychia rixfordii
(Under Scopulophila rixfordii)
Synonym
Acleisanthes
  ↳  Key to Acleisanthes
TRUMPETS
Acleisanthes longifloraANGEL TRUMPETSNative
Acleisanthes nevadensisDESERT WING-FRUITNative
Acmispon
  ↳  Key to Acmispon
DEERVETCH, DEERWEED
Acmispon americanus var. americanusNative
Acmispon argophyllusNative
Acmispon argophyllus var. adsurgensSAN CLEMENTE ISLAND BIRD'S-FOOT TREFOILNative
Acmispon argophyllus var. argenteusNative
Acmispon argophyllus var. argophyllusNative
Acmispon argophyllus var. fremontiiNative
Acmispon argophyllus var. niveusSANTA CRUZ ISLAND BIRD'S-FOOT TREFOILNative
Acmispon argyraeusNative
Acmispon argyraeus var. argyraeusNative
Acmispon argyraeus var. multicaulisSCRUB LOTUSNative
Acmispon argyraeus var. notitiusPROVIDENCE MOUNTAINS LOTUSNative
Acmispon brachycarpusNative
Acmispon cytisoidesNative
Acmispon decumbensNative
Acmispon decumbens var. davidsoniiNative
Acmispon decumbens var. decumbensNative
Acmispon dendroideusNative
Acmispon dendroideus var. dendroideusISLAND BROOMNative
Acmispon dendroideus var. traskiaeSAN CLEMENTE ISLAND LOTUSNative
Acmispon dendroideus var. veatchiiSAN MIGUEL ISLAND DEERWEEDNative
Acmispon denticulatusNative
Acmispon glaberDEERWEED, CALIFORNIA BROOMNative
Acmispon glaber var. brevialatusNative
Acmispon glaber var. glaberNative
Acmispon grandiflorusNative
Acmispon grandiflorus var. grandiflorusNative
Acmispon grandiflorus var. macranthusNative
Acmispon haydoniiPYGMY LOTUSNative
Acmispon heermannii
(Under Acmispon tomentosus)
Superfluous name
Acmispon heermannii var. heermannii
(Under Acmispon tomentosus var. glabriusculus)
Superfluous name
Acmispon heermannii var. orbicularis
(Under Acmispon tomentosus var. tomentosus)
Superfluous name
Acmispon junceusNative
Acmispon junceus var. biolettiiNative
Acmispon junceus var. junceusNative
Acmispon maritimusNative
Acmispon maritimus var. brevivexillusNative
Acmispon maritimus var. maritimusNative
Acmispon micranthusNative
Acmispon nevadensis
(Under Acmispon decumbens)
Superfluous name
Acmispon nevadensis var. davidsonii
(Under Acmispon decumbens var. davidsonii)
Superfluous name
Acmispon nevadensis var. nevadensis
(Under Acmispon decumbens var. decumbens)
Superfluous name
Acmispon parviflorusNative
Acmispon procumbensNative
Acmispon procumbens var. jepsoniiNative
Acmispon procumbens var. procumbensNative
Acmispon prostratusNUTTALL'S ACMISPONNative
Acmispon rigidusNative
Acmispon rubriflorusRED-FLOWERED BIRD'S-FOOT TREFOILNative
Acmispon strigosusNative
Acmispon strigosus var. hirtellus
(Under Acmispon strigosus)
Synonym
Acmispon tomentosusNative
Acmispon tomentosus var. glabriusculusNative
Acmispon tomentosus var. tomentosusNative
Acmispon wrangelianusNative
AconitumMONKSHOOD
Aconitum bulbiferum
(Under Aconitum columbianum subsp. viviparum)
Illegitimate name
Aconitum columbianum
  ↳  Key to Aconitum columbianum
Native
Aconitum columbianum subsp. columbianumNative
Aconitum columbianum subsp. pallidum
(Under Aconitum columbianum subsp. columbianum)
Synonym
Aconitum columbianum subsp. viviparumNative
Aconitum columbianum var. columbianum
(Under Aconitum columbianum subsp. columbianum)
Synonym
Aconitum columbianum var. howellii
(Under Aconitum columbianum subsp. viviparum)
Synonym
Aconitum columbianum var. ochroleucum
(Under Aconitum columbianum subsp. columbianum)
Synonym
Aconitum geranioides
(Under Aconitum columbianum subsp. columbianum)
Synonym
Aconitum hansenii
(Under Aconitum columbianum subsp. viviparum)
Synonym
Aconitum helleri
(Under Aconitum columbianum subsp. columbianum)
Synonym
Aconitum leibergii
(Under Aconitum columbianum subsp. columbianum)
Synonym
Aconitum mogollonicum
(Under Aconitum columbianum subsp. columbianum)
Synonym
Aconitum noveboracense
(Under Aconitum columbianum subsp. columbianum)
Synonym
Aconitum uncinatum subsp. noveboracense
(Under Aconitum columbianum subsp. columbianum)
Synonym
Aconitum viviparum
(Under Aconitum columbianum subsp. viviparum)
Synonym
Aconogonon
  ↳  Key to Aconogonon
Aconogonon davisiaeNative
Aconogonon davisiae var. glabrum
(Under Aconogonon davisiae)
Synonym
Aconogonon newberryiNative
Aconogonon phytolaccifoliumNative
Aconogonon phytolaccifolium var. glabrum
(Under Aconogonon phytolaccifolium)
Synonym
Aconogonon polystachyum
(Under Persicaria wallichii)
Synonym
Acourtia
Acourtia microcephalaNative
Acroptilon repens
(Under Rhaponticum repens)
Synonym
ActaeaBANEBERRY
Actaea rubraNative
Actaea rubra subsp. arguta
(Under Actaea rubra)
Synonym
Adelinia
Adelinia grandisADELINIANative
Adenocaulon
Adenocaulon bicolorTRAIL PLANTNative
Adenophyllum
  ↳  Key to Adenophyllum
Adenophyllum cooperiNative
Adenophyllum porophylloidesNative
Adenostoma
  ↳  Key to Adenostoma
Adenostoma fasciculatumCHAMISE, GREASEWOODNative
Adenostoma fasciculatum var. fasciculatumNative
Adenostoma fasciculatum var. obtusifoliumNative
Adenostoma fasciculatum var. prostratumNative
Adenostoma sparsifoliumRED SHANK, RIBBON WOODNative
Adiantum
  ↳  Key to Adiantum
Adiantum aleuticumFIVE-FINGER FERNNative
Adiantum boreale
(Under Adiantum aleuticum)
Synonym
Adiantum capillus-venerisSOUTHERN MAIDENHAIRNative
Adiantum jordaniiCALIFORNIA MAIDENHAIRNative
Adiantum pedatum subsp. calderi
(Under Adiantum aleuticum)
Synonym
Adiantum pedatum var. aleuticum
(Under Adiantum aleuticum)
Synonym
Adiantum pedatum var. subpumilum
(Under Adiantum aleuticum)
Synonym
Adiantum shastenseSHASTA MAIDENHAIRNative
Adolphia
Adolphia californicaCALIFORNIA ADOLPHIANative
AdonisPHEASANT'S EYE
Adonis aestivalisSUMMER PHEASANT'S EYENaturalized
Aegilops
  ↳  Key to Aegilops
GOAT GRASS
Aegilops cylindricaJOINTED GOAT GRASSNaturalized
Aegilops geniculataOVATE GOAT GRASSWaif
Aegilops neglectaTHREE-AWNED GOAT GRASSNaturalized
Aegilops ovata
(Under Aegilops geniculata)
Synonym
Aegilops triaristata
(Under Aegilops neglecta)
Synonym
Aegilops triuncialisBARBED GOAT GRASSNaturalized
Aegochloa cotulifolia
(Under Navarretia cotulifolia)
Synonym
Aeonium
  ↳  Key to Aeonium
Aeonium arboreum var. arboreumNaturalized
Aeonium haworthiiNaturalized
Aeschynomene
Aeschynomene rudisROUGH JOINTVETCHAgricultural weed
AesculusBUCKEYE
Aesculus californicaCALIFORNIA BUCKEYENative
Agastache
  ↳  Key to Agastache
HORSEMINT
Agastache glaucifolia
(Under Agastache urticifolia)
Synonym
Agastache parvifoliaNative
Agastache urticifoliaNative
Agastache urticifolia subsp. parvifolia
(Under Agastache parvifolia)
Synonym
Agavaceae
  ↳  Key to Agavaceae
CENTURY PLANT FAMILY
Agave
  ↳  Key to Agave
CENTURY PLANT
Agave consociata
(Under Agave deserti var. deserti)
Synonym
Agave desertiNative
Agave deserti subsp. deserti
(Under Agave deserti var. deserti)
Synonym
Agave deserti subsp. simplex
(Under Agave deserti var. simplex)
Synonym
Agave deserti var. desertiDESERT AGAVENative
Agave deserti var. simplexSIMPLE DESERT AGAVENative
Agave eborispina
(Under Agave utahensis var. eborispina)
Synonym
Agave nevadensis
(Under Agave utahensis var. nevadensis)
Synonym
Agave orcuttiana
(Under Agave shawii var. shawii)
Synonym
Agave pachyacantha
(Under Agave shawii var. shawii)
Synonym
Agave shawii var. shawiiSHAW AGAVENative
Agave utahensisUTAH AGAVENative
Agave utahensis var. eborispinaIVORY-SPINED AGAVENative
Agave utahensis var. nevadensisCLARK MOUNTAIN AGAVENative
Ageratina
  ↳  Key to Ageratina
SNAKEROOT
Ageratina adenophoraCROFTON WEEDNaturalized
Ageratina herbaceaDESERT AGERATINANative
Ageratina occidentalisWESTERN SNAKEROOTNative
Ageratina shastensisSHASTA AGERATINANative
Agnorhiza bolanderi
(Under Wyethia bolanderi)
Synonym
Agnorhiza elata
(Under Wyethia elata)
Synonym
Agnorhiza invenusta
(Under Wyethia invenusta)
Synonym
Agnorhiza ovata
(Under Wyethia ovata)
Synonym
Agnorhiza reticulata
(Under Wyethia reticulata)
Synonym
Agoseris
  ↳  Key to Agoseris
Agoseris ×dasycarpaNative
Agoseris ×elataNative
Agoseris apargioidesNative
Agoseris apargioides subsp. maritima
(Under Agoseris apargioides var. maritima)
Synonym
Agoseris apargioides var. apargioidesNative
Agoseris apargioides var. eastwoodiaeNative
Agoseris apargioides var. maritimaNative
Agoseris aurantiaca var. aurantiacaNative
Agoseris californica
(Under Agoseris heterophylla var. cryptopleura)
Synonym
Agoseris cinerea
(Under Agoseris grandiflora var. grandiflora)
Synonym
Agoseris decumbens
(Under Agoseris ×dasycarpa)
Synonym
Agoseris eastwoodiae
(Under Agoseris apargioides var. eastwoodiae)
Synonym
Agoseris elata
(Under Agoseris ×elata)
Synonym
Agoseris glauca var. dasycephala
(Under Agoseris monticola)
Misapplied name
Agoseris glauca var. glaucaNative
Agoseris glauca var. laciniata
(Under Agoseris parviflora)
Synonym
Agoseris glauca var. monticola
(Under Agoseris monticola)
Synonym
Agoseris gracilens
(Under Agoseris aurantiaca var. aurantiaca)
Synonym
Agoseris grandifloraNative
Agoseris grandiflora var. grandifloraNative
Agoseris grandiflora var. laciniata
(Under Agoseris ×elata)
Synonym
Agoseris grandiflora var. leptophyllaNative
Agoseris greenei
(Under Agoseris aurantiaca var. aurantiaca)
Synonym
Agoseris heterophyllaNative
Agoseris heterophylla var. californica
(Under Agoseris heterophylla var. cryptopleura)
Synonym
Agoseris heterophylla var. crenulata
(Under Agoseris heterophylla var. cryptopleura)
Synonym
Agoseris heterophylla var. cryptopleuraNative
Agoseris heterophylla var. heterophyllaNative
Agoseris heterophylla var. turgida
(Under Agoseris heterophylla var. cryptopleura)
Synonym
Agoseris hirsutaNative
Agoseris intermedia
(Under Agoseris grandiflora var. grandiflora)
Synonym
Agoseris laciniata
(Under Agoseris ×elata)
Synonym
Agoseris lackschewitzii
(Under Agoseris aurantiaca var. aurantiaca)
Synonym
Agoseris longula
(Under Agoseris glauca var. glauca)
Synonym
Agoseris major
(Under Agoseris heterophylla var. cryptopleura)
Synonym
Agoseris maritima
(Under Agoseris apargioides var. maritima)
Synonym
Agoseris marshallii
(Under Agoseris grandiflora var. grandiflora)
Synonym
Agoseris monticolaNative
Agoseris obtusifolia
(Under Agoseris grandiflora var. grandiflora)
Synonym
Agoseris parvifloraNative
Agoseris plebeia
(Under Agoseris grandiflora var. grandiflora)
Synonym
Agoseris retrorsaNative
Agoseris tenuifolia
(Under Agoseris ×elata)
Synonym
Agrimonia
  ↳  Key to Agrimonia
AGRIMONY
Agrimonia brittoniana
(Under Agrimonia striata)
Synonym
Agrimonia gryposepalaCOMMON AGRIMONYNative
Agrimonia macrocarpa
(Under Agrimonia gryposepala)
Synonym
Agrimonia parviflora var. macrocarpa
(Under Agrimonia gryposepala)
Synonym
Agrimonia striataBRITTON'S AGRIMONY, GROOVED AGRIMONYNative
Agrimonia striata var. campanulata
(Under Agrimonia striata)
Synonym
AgropyronCRESTED WHEAT GRASS
Agropyron cristatum subsp. desertorum
(Under Agropyron cristatum subsp. pectinatum)
Synonym
Agropyron cristatum subsp. pectinatumNaturalized
Agropyron dasystachyum
(Under Elymus lanceolatus subsp. lanceolatus)
Synonym
Agropyron desertorum
(Under Agropyron cristatum subsp. pectinatum)
Synonym
Agropyron elongatum
(Under Elymus ponticus)
Synonym, in part
Agropyron intermedium
(Under Elymus hispidus)
Synonym
Agropyron parishii
(Under Elymus stebbinsii)
Synonym
Agropyron pringlei
(Under Elymus sierrae)
Synonym
Agropyron repens
(Under Elymus repens)
Synonym
Agropyron riparium
(Under Elymus lanceolatus subsp. lanceolatus)
Synonym
Agropyron scribneri
(Under Elymus scribneri)
Synonym
Agropyron smithii
(Under Elymus smithii)
Synonym
Agropyron spicatum
(Under Elymus spicatus)
Synonym
Agropyron trachycaulum
(Under Elymus trachycaulus subsp. trachycaulus)
Synonym
Agropyron trichophorum
(Under Elymus hispidus)
Synonym
Agrostemma
Agrostemma githago var. githagoCORN-COCKLENaturalized
Agrostis
  ↳  Key to Agrostis
BENT GRASS
Agrostis alba
(Under Agrostis gigantea)
Unabridged misapplied name, in part
Agrostis alba var. alba
(Under Agrostis stolonifera)
Misapplied name, in part
Agrostis alba var. palustris
(Under Agrostis stolonifera)
Synonym
Agrostis ampla
(Under Agrostis exarata)
Synonym
Agrostis aristiglumis
(Under Agrostis microphylla)
Synonym
Agrostis avenaceaPACIFIC BENT GRASSNaturalized
Agrostis blasdaleiBLASDALE'S BENT GRASSNative
Agrostis blasdalei var. marinensis
(Under Agrostis blasdalei)
Synonym
Agrostis californica
(Under Agrostis densiflora)
Synonym
Agrostis capillarisCOLONIAL BENTNaturalized
Agrostis clivicola
(Under Agrostis densiflora)
Synonym
Agrostis clivicola var. punta-reyesensis
(Under Agrostis densiflora)
Synonym
Agrostis densifloraCALIFORNIA BENT GRASSNative
Agrostis diegoensis
(Under Agrostis pallens)
Synonym
Agrostis elliottianaSIERRA BENT GRASSNative
Agrostis exarataSPIKE BENT GRASSNative
Agrostis exarata var. monolepis
(Under Agrostis exarata)
Synonym
Agrostis exigua
(Under Agrostis elliottiana)
Synonym
Agrostis filiformis
(Under Agrostis avenacea)
Synonym
Agrostis giganteaREDTOPNaturalized
Agrostis halliiHALL'S BENT GRASSNative
Agrostis hendersoniiHENDERSON'S BENT GRASSNative
Agrostis hooveriHOOVER'S BENT GRASSNative
Agrostis humilisMOUNTAIN BENT GRASSNative
Agrostis idahoensisIDAHO REDTOPNative
Agrostis kennedyana
(Under Agrostis tandilensis)
Synonym
Agrostis lacuna-vernalisVERNAL POOL BENT GRASSNative
Agrostis lepida
(Under Agrostis pallens)
Synonym
Agrostis longiligula var. australis
(Under Agrostis exarata)
Synonym
Agrostis microphyllaSMALL-LEAF BENT GRASSNative
Agrostis microphylla var. hendersonii
(Under Agrostis hendersonii)
Synonym
Agrostis microphylla var. intermedia
(Under Agrostis microphylla)
Synonym
Agrostis oregonensisOREGON REDTOPNative
Agrostis pallensDUNE BENT GRASSNative
Agrostis scabraROUGH BENT GRASSNative
Agrostis scabra var. geminata
(Under Agrostis scabra)
Synonym
Agrostis semiverticillata
(Under Polypogon viridis)
Synonym
Agrostis stoloniferaCREEPING BENTNaturalized
Agrostis tandilensisKENNEDY'S BENT GRASSNaturalized
Agrostis tenuis
(Under Agrostis capillaris)
Synonym
Agrostis tenuis Vasey non Sibth.
(Under Agrostis idahoensis)
Illegitimate name
Agrostis thurberiana
(Under Agrostis humilis)
Synonym
Agrostis variabilisMOUNTAIN BENT GRASSNative
Agrostis viridis
(Under Polypogon viridis)
Synonym
Ailanthus
Ailanthus altissimaTREE OF HEAVENNaturalized
Aira
  ↳  Key to Aira
Aira caryophylleaSILVER HAIR GRASSNaturalized
Aira caryophyllea var. capillaris
(Under Aira elegans)
Synonym
Aira elegansELEGANT HAIR GRASSNaturalized
Aira elegantissima
(Under Aira elegans)
Synonym
Aira praecoxEARLY HAIR GRASSNaturalized
Aira pulchella
(Under Aira elegans)
Synonym
Aizoaceae
  ↳  Key to Aizoaceae
FIG-MARIGOLD or ICEPLANT FAMILY
Albizia
Albizia julibrissinSILK TREE, MIMOSANaturalized
Albizia lophantha
(Under Paraserianthes lophantha)
Synonym
Alcea
Alcea roseaHOLLYHOCKNaturalized
Alchemilla occidentalis
(Under Aphanes occidentalis)
Synonym
Aldama
Aldama purisimaeLA PURISIMA ALDAMANative
Alhagi
Alhagi maurorumCAMEL THORNNaturalized
Alhagi pseudalhagi
(Under Alhagi maurorum)
Synonym
Aliciella
  ↳  Key to Aliciella
Aliciella humillimaSMALLEST ALICIELLANative
Aliciella hutchinsifoliaDESERT PALE ALICIELLANative
Aliciella latifolia subsp. latifoliaBROAD-LEAVED ALICIELLANative
Aliciella leptomeriaSAND ALICIELLANative
Aliciella lottiaeLOTT'S ALICIELLANative
Aliciella micromeriaDAINTY ALICIELLANative
Aliciella monoensisMONO LAKE ALICIELLANative
Aliciella ripleyiRIPLEY'S ALICIELLANative
Aliciella subacaulis
(Under Aliciella monoensis)
Misapplied name
Aliciella triodonCOYOTE GILIANative
Aliciella triodon var. humillima
(Under Aliciella humillima)
Synonym
Alisma
  ↳  Key to Alisma
WATER-PLANTAIN
Alisma geyeri
(Under Alisma gramineum)
Synonym
Alisma gramineumGRASS ALISMANative
Alisma lanceolatumNaturalized
Alisma plantago-aquatica
(Under Alisma triviale)
Misapplied name
Alisma subcordatum
(Under Alisma triviale)
Unabridged misapplied name
Alisma trivialeNative
Alismataceae
  ↳  Key to Alismataceae
WATER-PLANTAIN FAMILY
AllenrolfeaIODINE BUSH
Allenrolfea occidentalisNative
Alliaceae
  ↳  Key to Alliaceae
ONION or GARLIC FAMILY
AllioniaWINDMILLS
Allionia incarnata
  ↳  Key to Allionia incarnata
Native
Allionia incarnata var. incarnataNative
Allionia incarnata var. nudata
(Under Allionia incarnata var. incarnata)
Synonym
Allionia incarnata var. villosaNative
Allium
  ↳  Key to Allium
ONION, GARLIC
Allium abramsiiNative
Allium acuminatumNative
Allium acuminatum var. gracile
(Under Allium amplectens)
Synonym
Allium amplectensNative
Allium ancepsNative
Allium anserinum
(Under Allium fimbriatum var. fimbriatum)
Synonym
Allium arenicola
(Under Allium geyeri var. tenerum)
Synonym
Allium atrorubensNative
Allium atrorubens var. atrorubensGREAT BASIN ONIONNative
Allium atrorubens var. cristatumINYO ONIONNative
Allium atrorubens var. inyonis
(Under Allium atrorubens var. cristatum)
Synonym
Allium attenuifolium
(Under Allium amplectens)
Synonym
Allium attenuifolium var. monospermum
(Under Allium amplectens)
Synonym
Allium bisceptrumNative
Allium bisceptrum var. bisceptrum
(Under Allium bisceptrum)
Synonym
Allium bolanderiNative
Allium bolanderi var. bolanderiNative
Allium bolanderi var. mirabileNative
Allium bolanderi var. stenanthum
(Under Allium bolanderi var. bolanderi)
Synonym
Allium breweri
(Under Allium falcifolium)
Synonym
Allium burlewiiNative
Allium campanulatumNative
Allium cepaWaif
Allium cratericolaNative
Allium crispumNative
Allium croceum
(Under Bloomeria crocea)
Synonym
Allium davisiae
(Under Allium lacunosum var. davisiae)
Synonym
Allium denticulatumNative
Allium diabloense
(Under Allium diabolense)
Orthographic variant
Allium diabolenseNative
Allium dichlamydeumNative
Allium falcifoliumNative
Allium falcifolium var. breweri
(Under Allium falcifolium)
Synonym
Allium falcifolium var. demissum
(Under Allium siskiyouense)
Synonym
Allium fibrosum
(Under Allium geyeri var. tenerum)
Synonym
Allium fimbriatumNative
Allium fimbriatum subsp. parryi
(Under Allium parryi)
Synonym
Allium fimbriatum var. aboriginum
(Under Allium fimbriatum var. fimbriatum)
Synonym
Allium fimbriatum var. abramsii
(Under Allium abramsii)
Synonym
Allium fimbriatum var. denticulatum
(Under Allium denticulatum)
Synonym
Allium fimbriatum var. diabolense
(Under Allium diabolense)
Synonym
Allium fimbriatum var. fimbriatumNative
Allium fimbriatum var. mohavenseNative
Allium fimbriatum var. munzii
(Under Allium munzii)
Synonym
Allium fimbriatum var. purdyiPURDY'S ONIONNative
Allium fimbriatum var. sharsmithiae
(Under Allium sharsmithiae)
Synonym
Allium geyeri var. graniferum
(Under Allium geyeri var. tenerum)
Synonym
Allium geyeri var. tenerumBULBIL ONIONNative
Allium haematochitonNative
Allium hickmaniiHICKMAN'S ONIONNative
Allium hoffmaniiBEEGUM ONIONNative
Allium howelliiNative
Allium howellii subsp. sanbenitense
(Under Allium howellii var. sanbenitense)
Synonym
Allium howellii var. clokeyiMOUNT PINOS ONIONNative
Allium howellii var. howelliiNative
Allium howellii var. sanbenitenseNative
Allium hyalinumNative
Allium incomptumMINNESOTA MOUNTAIN ONIONNative
Allium intactum
(Under Allium sanbornii var. congdonii)
Synonym
Allium jepsoniiJEPSON'S ONIONNative
Allium lacteum
(Under Triteleia hyacinthina)
Synonym
Allium lacunosumNative
Allium lacunosum var. davisiaeNative
Allium lacunosum var. kernenseNative
Allium lacunosum var. kernensis
(Under Allium lacunosum var. kernense)
Orthographic variant
Allium lacunosum var. lacunosumNative
Allium lacunosum var. micranthumNative
Allium lemmoniiNative
Allium marviniiYUCAIPA ONIONNative
Allium membranaceumNative
Allium monospermum
(Under Allium amplectens)
Synonym
Allium monticolaNative
Allium monticola subsp. keckii
(Under Allium monticola)
Synonym
Allium monticola var. keckii
(Under Allium monticola)
Synonym ined.
Allium munziiMUNZ'S ONIONNative
Allium neapolitanumNaturalized
Allium nevadenseNEVADA ONIONNative
Allium nevadense var. cristatum
(Under Allium atrorubens var. cristatum)
Synonym
Allium obtusumNative
Allium obtusum var. conspicuumNative
Allium obtusum var. obtusumNative
Allium occidentale
(Under Allium amplectens)
Synonym
Allium paniculatum var. paniculatumNaturalized
Allium parishiiPARISH'S ONIONNative
Allium parishii var. keckii
(Under Allium monticola)
Synonym
Allium parryiNative
Allium parvumNative
Allium peirsonii
(Under Allium monticola)
Synonym
Allium peninsulareNative
Allium peninsulare var. franciscanumFRANCISCAN ONIONNative
Allium peninsulare var. peninsulareNative
Allium platycauleNative
Allium praecoxNative
Allium punctumDOTTED ONIONNative
Allium rubrum
(Under Allium geyeri var. tenerum)
Synonym
Allium rydbergii
(Under Allium geyeri var. tenerum)
Synonym
Allium sabulicola
(Under Allium geyeri var. tenerum)
Synonym
Allium sanborniiNative
Allium sanbornii var. congdoniiCONGDON'S ONIONNative
Allium sanbornii var. jepsonii
(Under Allium jepsonii)
Synonym
Allium sanbornii var. sanborniiSANBORN'S ONIONNative
Allium sanbornii var. tuolumnense
(Under Allium tuolumnense)
Synonym
Allium sativumGARLICWaif
Allium serraNative
Allium serratum
(Under Allium amplectens)
Synonym
Allium serratum
(Under Allium serra)
Unabridged misapplied name
Allium sharsmithae
(Under Allium sharsmithiae)
Orthographic variant
Allium sharsmithiaeSHARSMITH'S ONIONNative
Allium shevockiiSPANISH NEEDLE ONIONNative
Allium siskiyouenseSISKIYOU ONIONNative
Allium stenanthum
(Under Allium bolanderi var. bolanderi)
Synonym
Allium tilingii
(Under Triteleia hyacinthina)
Synonym
Allium tolmiei var. tolmieiNative
Allium tribracteatumTHREE-BRACTED ONIONNative
Allium tribracteatum var. jacintense
(Under Allium cratericola)
Synonym
Allium triquetrumNaturalized
Allium tuolumnenseRAWHIDE HILL ONIONNative
Allium unifoliumNative
Allium validumNative
Allium vinealeNaturalized
Allium yosemitenseYOSEMITE ONIONNative
Allocarya parishii
(Under Plagiobothrys parishii)
Synonym
Allophyllum
  ↳  Key to Allophyllum
Allophyllum divaricatumNative
Allophyllum gilioidesNative
Allophyllum gilioides subsp. gilioidesNative
Allophyllum gilioides subsp. violaceumNative
Allophyllum glutinosumNative
Allophyllum integrifoliumNative
Allophyllum violaceum
(Under Allophyllum gilioides subsp. violaceum)
Synonym
AllotropaSUGAR STICK
Allotropa virgataNative
AlmutasterMARSH ALKALI ASTER
Almutaster pauciflorusNative
Alnus
  ↳  Key to Alnus
ALDER
Alnus cordataITALIAN ALDERWaif
Alnus fruticosa
(Under Alnus viridis subsp. fruticosa)
Synonym
Alnus incana subsp. tenuifoliaMOUNTAIN ALDERNative
Alnus oregona
(Under Alnus rubra)
Synonym
Alnus rhombifoliaWHITE ALDERNative
Alnus rubraRED ALDERNative
Alnus sinuata
(Under Alnus viridis subsp. sinuata)
Synonym
Alnus tenuifolia
(Under Alnus incana subsp. tenuifolia)
Synonym
Alnus viridisGREEN ALDERNative
Alnus viridis subsp. fruticosaSIBERIAN ALDERNative
Alnus viridis subsp. sinuataTHINLEAF or SITKA ALDERNative
Aloe
  ↳  Key to Aloe
Aloe ×schoenlandiiNaturalized
Aloe maculataNaturalized
Aloe saponaria
(Under Aloe maculata)
Illegitimate name
Aloe saponaria
(Under Aloe ×schoenlandii)
Synonym
Aloe striata
(Under Aloe ×schoenlandii)
Synonym
Alopecurus
  ↳  Key to Alopecurus
FOXTAIL
Alopecurus aequalisSHORT-AWN FOXTAILNative
Alopecurus aequalis var. aequalisNative
Alopecurus aequalis var. sonomensisSONOMA ALOPECURUSNative
Alopecurus aristulatus
(Under Alopecurus aequalis var. aequalis)
Synonym
Alopecurus californicus
(Under Alopecurus saccatus)
Synonym
Alopecurus carolinianusNative
Alopecurus geniculatusWATER FOXTAILNative
Alopecurus howellii
(Under Alopecurus saccatus)
Synonym
Alopecurus myosuroidesNaturalized
Alopecurus pallescens
(Under Alopecurus geniculatus)
Synonym
Alopecurus pratensisMEADOW FOXTAILNaturalized
Alopecurus saccatusNative
Aloysia
Aloysia wrightiiWRIGHT'S BEEBRUSHNative
Alternanthera
  ↳  Key to Alternanthera
Alternanthera caracasanaNaturalized
Alternanthera lanuginosa
(Under Tidestromia lanuginosa)
Synonym
Alternanthera peploides
(Under Alternanthera caracasana)
Synonym
Alternanthera philoxeroidesALLIGATOR WEEDNaturalized
Alternanthera pungens
(Under Alternanthera caracasana)
Unabridged misapplied name
Alternanthera repens
(Under Alternanthera caracasana)
Unabridged misapplied name
Althaea rosea
(Under Alcea rosea)
Synonym
Alyogyne
Alyogyne huegeliiBLUE HIBISCUSWaif
Alyssum
  ↳  Key to Alyssum
Alyssum alyssoidesNaturalized
Alyssum desertorumNaturalized
Alyssum minus subsp. micranthum
(Under Alyssum simplex)
Synonym
Alyssum minus var. micranthum
(Under Alyssum simplex)
Synonym
Alyssum simplexNaturalized
Amaranthaceae
  ↳  Key to Amaranthaceae
AMARANTH FAMILY
Amaranthus
  ↳  Key to Amaranthus
AMARANTH, PIGWEED
Amaranthus albusTUMBLEWEEDNaturalized
Amaranthus arenicolaSAND AMARANTHNaturalized
Amaranthus blitoidesPROCUMBENT PIGWEEDNative
Amaranthus blitum subsp. emarginatusWaif
Amaranthus bouchonii
(Under Amaranthus powellii)
Synonym
Amaranthus californicusCALIFORNIAN AMARANTHNative
Amaranthus caudatusLOVE-LIES-BLEEDING, FOXTAIL AMARANTH, QUILETEWaif
Amaranthus cruentusPURPLE AMARANTHWaif
Amaranthus deflexusNaturalized
Amaranthus emarginatus
(Under Amaranthus blitum subsp. emarginatus)
Synonym
Amaranthus fimbriatusFRINGED AMARANTHNative
Amaranthus graecizans
(Under Amaranthus albus)
Unabridged misapplied name
Amaranthus graecizans
(Under Amaranthus blitoides)
Unabridged misapplied name
Amaranthus hybridusSMOOTH PIGWEED, GREEN AMARANTHNaturalized
Amaranthus hypochondriacusPRINCE'S-FEATHERWaif
Amaranthus palmeriPALMER'S AMARANTHNative
Amaranthus powelliiPOWELL'S AMARANTHNative
Amaranthus powellii subsp. bouchonii
(Under Amaranthus powellii)
Synonym
Amaranthus retroflexusREDROOT PIGWEEDNaturalized
Amaranthus rudis
(Under Amaranthus tuberculatus var. rudis)
Synonym
Amaranthus spinosusSPINY AMARANTH, THORNY AMARANTHWaif
Amaranthus torreyiTORREY'S AMARANTHNative
Amaranthus tuberculatus var. rudisCOMMON WATERHEMPNaturalized
Amaranthus viridisSLENDER AMARANTHWaif
Amaranthus watsoniiWATSON'S AMARANTHNative
Amaryllidaceae
  ↳  Key to Amaryllidaceae
AMARYLLIS FAMILY
Amaryllis
Amaryllis belladonnaNAKED LADIESNaturalized
Amauriopsis dissecta
(Under Hymenothrix dissecta)
Synonym
Amauropelta
Amauropelta nevadensisNEVADA MARSH FERNNative
Amblyopappus
Amblyopappus pusillusNative
Ambrosia
  ↳  Key to Ambrosia
RAGWEED, BUR-SAGE, BURROBRUSH
Ambrosia ×platyspinaHYBRID BUR-SAGESpontaneous hybrid
Ambrosia acanthicarpaANNUAL BUR-SAGENative
Ambrosia ambrosioidesBIG BUR-SAGENative
Ambrosia artemisiifoliaCOMMON RAGWEEDNaturalized
Ambrosia chamissonisBEACH BUR-SAGENative
Ambrosia chamissonis var. bipinnatisecta
(Under Ambrosia chamissonis)
Synonym
Ambrosia chenopodiifoliaSAN DIEGO BUR-SAGENative
Ambrosia confertifloraNative
Ambrosia dumosaWHITE BUR-SAGENative
Ambrosia eriocentraWOOLLY BUR-SAGENative
Ambrosia ilicifoliaHOLLY-LEAVED BUR-SAGENative
Ambrosia monogyraSINGLEWHORL BURROBRUSHNative
Ambrosia psilostachyaWESTERN RAGWEEDNative
Ambrosia psilostachya var. californica
(Under Ambrosia psilostachya)
Synonym
Ambrosia pumilaSAN DIEGO AMBROSIANative
Ambrosia salsolaCOMMON BURROBRUSH, CHEESEBUSHNative
Ambrosia salsola var. fasciculata
(Under Ambrosia salsola var. salsola)
Synonym
Ambrosia salsola var. pentalepisNative
Ambrosia salsola var. salsolaNative
Ambrosia trifidaGIANT RAGWEEDWaif
Amelanchier
  ↳  Key to Amelanchier
SERVICE-BERRY
Amelanchier alnifoliaNative
Amelanchier alnifolia var. pumilaNative
Amelanchier alnifolia var. semiintegrifoliaNative
Amelanchier florida
(Under Amelanchier alnifolia var. semiintegrifolia)
Synonym
Amelanchier pumila
(Under Amelanchier alnifolia var. pumila)
Synonym
Amelanchier utahensisUTAH SERVICE-BERRYNative
Amelichloa brachychaeta
(Under Stipa brachychaeta)
Synonym
Amerosedum lanceolatum
(Under Sedum lanceolatum)
Synonym
Amerosedum radiatum
(Under Sedum radiatum)
Synonym
Amerosedum radiatum subsp. depauperatum
(Under Sedum radiatum subsp. depauperatum)
Synonym
Amerosedum radiatum subsp. radiatum
(Under Sedum radiatum subsp. radiatum)
Synonym
Ammannia
  ↳  Key to Ammannia
Ammannia coccineaNative
Ammannia coccinea subsp. purpurea
(Under Ammannia coccinea)
Synonym
Ammannia coccinea subsp. robusta
(Under Ammannia robusta)
Synonym
Ammannia robustaNative
Ammi
  ↳  Key to Ammi
Ammi majusNaturalized
Ammi visnagaBISNAGANaturalized
Ammobroma sonorae
(Under Pholisma sonorae)
Synonym
AmmophilaBEACHGRASS
Ammophila arenariaEUROPEAN BEACHGRASSNaturalized
Ammoselinum
Ammoselinum giganteumDESERT SAND-PARSLEYNative
Amorpha
  ↳  Key to Amorpha
FALSE INDIGO
Amorpha californicaNative
Amorpha californica var. californicaNative
Amorpha californica var. napensisNAPA FALSE INDIGONative
Amorpha fruticosaNative
Amorpha fruticosa var. occidentalis
(Under Amorpha fruticosa)
Synonym
Ampelodesmos mauritanica
(Under Stipa mauritanica)
Orthographic variant
Ampelodesmos mauritanicus
(Under Stipa mauritanica)
Synonym
AmphipappusCHAFF-BUSH
Amphipappus fremontii
  ↳  Key to Amphipappus fremontii
Native
Amphipappus fremontii var. fremontiiNative
Amphipappus fremontii var. spinosusNative
AmphiscirpusNEVADA BULRUSH
Amphiscirpus nevadensisNative
Amsinckia
  ↳  Key to Amsinckia
FIDDLENECK
Amsinckia douglasianaDOUGLAS' FIDDLENECKNative
Amsinckia eastwoodiaeEASTWOOD'S FIDDLENECKNative
Amsinckia furcataFORKED FIDDLENECKNative
Amsinckia gloriosa
(Under Amsinckia tessellata var. gloriosa)
Synonym
Amsinckia grandifloraLARGE-FLOWERED FIDDLENECKNative
Amsinckia helleri
(Under Amsinckia retrorsa)
Synonym
Amsinckia intermediaCOMMON FIDDLENECKNative
Amsinckia intermedia var. eastwoodiae
(Under Amsinckia eastwoodiae)
Synonym
Amsinckia intermedia var. echinata
(Under Amsinckia intermedia)
Synonym
Amsinckia lunarisBENT-FLOWERED FIDDLENECKNative
Amsinckia lycopsoidesBUGLOSS-FLOWERED FIDDLENECKNative
Amsinckia menziesiiCOMMON FIDDLENECK, SMALL-FLOWERED FIDDLENECKNative
Amsinckia menziesii var. intermedia
(Under Amsinckia intermedia)
Synonym ined.
Amsinckia menziesii var. menziesii
(Under Amsinckia menziesii)
Synonym
Amsinckia micrantha
(Under Amsinckia menziesii)
Synonym
Amsinckia retrorsaRIGID FIDDLENECKNative
Amsinckia scouleri
(Under Amsinckia spectabilis var. spectabilis)
Synonym
Amsinckia spectabilisNative
Amsinckia spectabilis var. microcarpaMESA FIDDLENECKNative
Amsinckia spectabilis var. sancti-nicolai
(Under Amsinckia spectabilis var. spectabilis)
Synonym
Amsinckia spectabilis var. spectabilisSEASIDE FIDDLENECKNative
Amsinckia straminea
(Under Amsinckia lycopsoides)
Synonym
Amsinckia tessellataNative
Amsinckia tessellata var. elegans
(Under Amsinckia tessellata var. tessellata)
Synonym
Amsinckia tessellata var. gloriosaCARRIZO FIDDLENECKNative
Amsinckia tessellata var. tessellataDESERT FIDDLENECKNative
Amsinckia vernicosaWAXY FIDDLENECKNative
Amsinckia vernicosa var. furcata
(Under Amsinckia furcata)
Synonym
Amsinckia vernicosa var. vernicosa
(Under Amsinckia vernicosa)
Synonym
Amsinckiopsis
Amsinckiopsis kingiiGREAT BASIN POPCORNFLOWERNative
Amsinckiopsis kingii var. harknessiiNORTHERN GREAT BASIN POPCORNFLOWERNative
Amsinckiopsis kingii var. kingiiSOUTHERN GREAT BASIN POPCORNFLOWERNative
Amsonia
Amsonia brevifolia
(Under Amsonia tomentosa)
Synonym
Amsonia tomentosaNative
Amsonia tomentosa var. tomentosa
(Under Amsonia tomentosa)
Synonym
Anacardiaceae
  ↳  Key to Anacardiaceae
SUMAC or CASHEW FAMILY
Anacharis canadensis
(Under Elodea canadensis)
Synonym
Anacharis nuttallii
(Under Elodea nuttallii)
Synonym
Anagallis arvensis
(Under Lysimachia arvensis)
Synonym
Anagallis arvensis subsp. arvensis
(Under Lysimachia arvensis)
Synonym
Anagallis arvensis subsp. foemina
(Under Lysimachia arvensis)
Misapplied name
Anagallis arvensis var. caerulea
(Under Lysimachia arvensis)
Synonym
Anagallis caerulea
(Under Lysimachia arvensis)
Synonym
Anagallis caerulea
(Under Lysimachia arvensis)
Misapplied name
Anagallis caerulea
(Under Lysimachia arvensis)
Misapplied name
Anagallis foemina
(Under Lysimachia arvensis)
Misapplied name
Anagallis linifolia
(Under Lysimachia monelli)
Synonym
Anagallis minima
(Under Lysimachia minima)
Synonym
Anagallis monelli
(Under Lysimachia monelli)
Synonym
AnaphalisPEARLY EVERLASTING
Anaphalis margaritaceaNative
Anchusa
  ↳  Key to Anchusa
ALKANET
Anchusa azureaGARDEN ALKANETWaif
Anchusa officinalisCOMMON ALKANETNaturalized
Anchusa procera
(Under Anchusa officinalis)
Synonym
Ancistrocarphus
  ↳  Key to Ancistrocarphus
GROUNDSTAR, WOOLLY FISHHOOKS
Ancistrocarphus filagineusWOOLLY FISHHOOKSNative
Ancistrocarphus keiliiSANTA YNEZ GROUNDSTARNative
Andersonglossum
Andersonglossum occidentaleWESTERN HOUND'S TONGUENative
Andromeda venulosa
(Under Arctostaphylos hookeri subsp. hookeri)
Synonym
Andropogon
  ↳  Key to Andropogon
BLUESTEM
Andropogon barbinodis
(Under Bothriochloa barbinodis)
Synonym
Andropogon glomeratus var. scabriglumisSOUTHWESTERN BUSHY BLUESTEMNative
Andropogon ischaemum
(Under Bothriochloa ischaemum)
Synonym
Andropogon torreyanus
(Under Bothriochloa laguroides subsp. torreyana)
Synonym
Andropogon virginicus var. virginicusBROOMSEDGE BLUESTEMNaturalized
Androsace
  ↳  Key to Androsace
Androsace acuta
(Under Androsace elongata subsp. acuta)
Synonym
Androsace arizonica
(Under Androsace occidentalis)
Synonym
Androsace elongata subsp. acutaCALIFORNIA ANDROSACENative
Androsace filiformisSLENDER-STEMMED ANDROSACENative
Androsace occidentalisWESTERN ROCK-JASMINENative
Androsace occidentalis var. acuta
(Under Androsace elongata subsp. acuta)
Synonym
Androsace occidentalis var. simplex
(Under Androsace occidentalis)
Synonym
Androsace septentrionalisPYGMY-FLOWER ROCK-JASMINENative
Androsace septentrionalis subsp. puberulenta
(Under Androsace septentrionalis)
Synonym
Androsace septentrionalis subsp. subumbellata
(Under Androsace septentrionalis)
Synonym
Androstephium
Androstephium breviflorumSMALL-FLOWERED ANDROSTEPHIUMNative
Anelsonia
Anelsonia eurycarpaNative
Anemone
  ↳  Key to Anemone
ANEMONE
Anemone deltoideaNative
Anemone drummondii subsp. drummondii
(Under Anemone drummondii var. drummondii)
Synonym
Anemone drummondii var. drummondiiNative
Anemone grayiNative
Anemone lyalliiNative
Anemone multifida var. hudsoniana
(Under Anemone multifida var. multifida)
Synonym
Anemone multifida var. multifidaNative
Anemone occidentalisNative
Anemone oligantha
(Under Anemone lyallii)
Synonym
Anemone oregana var. oreganaNative
Anemone quinquefolia var. grayi
(Under Anemone grayi)
Synonym
Anemone quinquefolia var. lyallii
(Under Anemone lyallii)
Synonym
Anemone quinquefolia var. minor
(Under Anemone grayi)
Synonym
Anemone tuberosaNative
Anemopsis
Anemopsis californicaYERBA MANSANative
Anemopsis californica var. subglabra
(Under Anemopsis californica)
Synonym
Anethum
Anethum graveolensDILLNaturalized
Angelica
  ↳  Key to Angelica
Angelica argutaANGELICANative
Angelica breweriNative
Angelica californicaNative
Angelica calliiCALL'S ANGELICANative
Angelica capitellataRANGER'S BUTTONS, SWAMP WHITE HEADSNative
Angelica genuflexaNative
Angelica hendersoniiNative
Angelica kingiiKING'S ANGELICANative
Angelica linearilobaNative
Angelica lineariloba var. culbertsonii
(Under Angelica lineariloba)
Synonym
Angelica lucidaSEA-WATCHNative
Angelica tomentosaNative
Angelica tomentosa var. californica
(Under Angelica californica)
Synonym
Angelica tomentosa var. hendersonii
(Under Angelica hendersonii)
Synonym
Anisocarpus
  ↳  Key to Anisocarpus
Anisocarpus madioidesWOODLAND TARWEEDNative
Anisocarpus scabridusSCABRID ALPINE TARPLANTNative
AnisocomaSCALEBUD
Anisocoma acaulisNative
Anisodontea
Anisodontea capensisCAPE MALLOWGarden and urban weed
Anoda
  ↳  Key to Anoda
Anoda cristataVIOLETTASNaturalized
Anoda cristata var. digitata
(Under Anoda cristata)
Synonym
Anoda pentaschistaFIELD ANODAAgricultural weed
Anoda pentaschista var. obtusior
(Under Anoda pentaschista)
Synonym
Anotites diffusa
(Under Silene menziesii)
Synonym
AnrederaMADEIRA VINE
Anredera cordifoliaMIGNONETTE VINEAgricultural, garden, or urban weed
Antennaria
  ↳  Key to Antennaria
PUSSY-TOES
Antennaria argenteaNative
Antennaria corymbosaNative
Antennaria dimorphaNative
Antennaria dioica var. kernensis
(Under Antennaria umbrinella)
Synonym
Antennaria flagellarisSTOLONIFEROUS PUSSY-TOESNative
Antennaria geyeriNative
Antennaria howellii subsp. howelliiNative
Antennaria luzuloidesNative
Antennaria luzuloides subsp. aberransNative
Antennaria luzuloides subsp. luzuloidesNative
Antennaria marginataWHITE-MARGINED EVERLASTINGNative
Antennaria mediaNative
Antennaria media subsp. ciliata
(Under Antennaria pulchella)
Synonym
Antennaria media subsp. media
(Under Antennaria media)
Synonym
Antennaria media subsp. pulchella
(Under Antennaria pulchella)
Synonym
Antennaria microcephala
(Under Antennaria luzuloides subsp. aberrans)
Synonym
Antennaria microphyllaNative
Antennaria pulchellaBEAUTIFUL PUSSY-TOESNative
Antennaria pyramidata
(Under Antennaria luzuloides subsp. aberrans)
Synonym
Antennaria racemosaNative
Antennaria roseaNative
Antennaria rosea subsp. confinisNative
Antennaria rosea subsp. roseaNative
Antennaria sawyeriNative
Antennaria scabra
(Under Antennaria pulchella)
Synonym
Antennaria suffrutescensEVERGREEN EVERLASTINGNative
Antennaria umbrinellaNative
Anthemis
  ↳  Key to Anthemis
DOG-FENNEL, CHAMOMILE
Anthemis arvensisCORN CHAMOMILENaturalized
Anthemis arvensis var. agrestis
(Under Anthemis arvensis)
Synonym
Anthemis cotulaMAYWEEDNaturalized
Anthemis foetida
(Under Anthemis cotula)
Synonym
Anthemis fuscata
(Under Chamaemelum fuscatum)
Synonym
Anthemis tinctoria
(Under Cota tinctoria)
Synonym
Anthoxanthum
  ↳  Key to Anthoxanthum
VERNAL GRASS, VANILLA GRASS
Anthoxanthum aristatum subsp. aristatumANNUAL VERNAL GRASSNaturalized
Anthoxanthum hirtum
(Under Anthoxanthum nitens subsp. nitens)
Synonym
Anthoxanthum nitens subsp. nitensVANILLA GRASSNative
Anthoxanthum occidentaleCALIFORNIA SWEET GRASSNative
Anthoxanthum odoratumSWEET VERNAL GRASSNaturalized
Anthriscus
Anthriscus caucalisBUR-CHERVILNaturalized
Anthriscus scandicina
(Under Anthriscus caucalis)
Synonym
Antirrhinum
  ↳  Key to Antirrhinum
SNAPDRAGON
Antirrhinum breweri
(Under Antirrhinum vexillocalyculatum subsp. breweri)
Synonym
Antirrhinum confertiflorumGHOST FLOWERNative
Antirrhinum cornutumNative
Antirrhinum cornutum var. leptaleum
(Under Antirrhinum leptaleum)
Synonym
Antirrhinum coulterianumNative
Antirrhinum cyathiferum
(Under Pseudorontium cyathiferum)
Synonym
Antirrhinum filipesNative
Antirrhinum glandulosum
(Under Antirrhinum thompsonii)
Illegitimate name
Antirrhinum kelloggiiNative
Antirrhinum kingiiNative
Antirrhinum leptaleumNative
Antirrhinum majusWaif
Antirrhinum mohaveaGOLDEN DESERT SNAPDRAGONNative
Antirrhinum multiflorum
(Under Antirrhinum thompsonii)
Illegitimate name
Antirrhinum nuttallianumNative
Antirrhinum nuttallianum subsp. nuttallianumNative
Antirrhinum nuttallianum subsp. subsessileNative
Antirrhinum orontiumWaif
Antirrhinum ovatumOVAL-LEAVED SNAPDRAGONNative
Antirrhinum subcordatumDIMORPHIC SNAPDRAGONNative
Antirrhinum thompsoniiNative
Antirrhinum vexillo-calyculatum
(Under Antirrhinum vexillocalyculatum)
Orthographic variant
Antirrhinum vexillocalyculatumNative
Antirrhinum vexillocalyculatum subsp. breweriNative
Antirrhinum vexillocalyculatum subsp. intermediumNative
Antirrhinum vexillocalyculatum subsp. vexillocalyculatumNative
Antirrhinum virgaTWIG-LIKE SNAPDRAGONNative
AnulocaulisRINGSTEM
Anulocaulis annulatusNative
Apera
  ↳  Key to Apera
Apera interruptaNaturalized
Apera spica-ventiNaturalized
Apetlorhamnus alnifolia
(Under Rhamnus alnifolia)
Synonym
Aphanes
Aphanes occidentalisNative
Aphanisma
Aphanisma blitoidesAPHANISMANative
Aphyllon
  ↳  Key to Aphyllon
BROOMRAPE
Aphyllon californicumNative
Aphyllon californicum subsp. californicumNative
Aphyllon californicum subsp. condensumNative
Aphyllon californicum subsp. feudgeiNative
Aphyllon californicum subsp. grandeNative
Aphyllon californicum subsp. grayanumNative
Aphyllon californicum subsp. jepsoniiNative
Aphyllon cooperiNative
Aphyllon corymbosumNative
Aphyllon epigaliumGALIUM BROOMRAPENative
Aphyllon epigalium subsp. epigaliumNative
Aphyllon epigalium subsp. notocalifornicumGALIUM BROOMRAPENative
Aphyllon fasciculatumCLUSTERED BROOMRAPENative
Aphyllon franciscanumFRANCISCAN BROOMRAPENative
Aphyllon parishiiNative
Aphyllon parishii subsp. brachylobumSHORT-LOBED BROOMRAPENative
Aphyllon parishii subsp. parishiiNative
Aphyllon pinorumNative
Aphyllon purpureumNative
Aphyllon robbinsiiROBBINS' BROOMRAPENative
Aphyllon tuberosumNative
Aphyllon validumNative
Aphyllon validum subsp. howelliiHOWELL'S BROOMRAPENative
Aphyllon validum subsp. validumROCK CREEK BROOMRAPENative
Aphyllon vallicolaNative
Apiaceae (Umbelliferae)
  ↳  Key to Apiaceae (Umbelliferae)
CARROT FAMILY
Apiastrum
Apiastrum angustifoliumNative
Apium
  ↳  Key to Apium
Apium graveolensCELERYNaturalized
Apium leptophyllum
(Under Cyclospermum leptophyllum)
Synonym
Apium nodiflorumWaif
Apocynaceae
  ↳  Key to Apocynaceae
DOGBANE FAMILY
Apocynum
  ↳  Key to Apocynum
DOGBANE
Apocynum ×floribundum
(Under Apocynum androsaemifolium)
Synonym
Apocynum androsaemifoliumBITTER DOGBANENative
Apocynum androsaemifolium var. glabrum
(Under Apocynum androsaemifolium)
Synonym
Apocynum androsaemifolium var. nevadense
(Under Apocynum androsaemifolium)
Synonym
Apocynum cannabinumHEMP DOGBANENative
Apocynum cannabinum var. glaberrimum
(Under Apocynum cannabinum)
Synonym
Apocynum diversifolium
(Under Apocynum androsaemifolium)
Synonym
Apocynum medium var. floribundum
(Under Apocynum androsaemifolium)
Synonym
Apocynum oblongum
(Under Apocynum cannabinum)
Synonym
Apocynum palustre
(Under Apocynum cannabinum)
Synonym
Apocynum pumilum
(Under Apocynum androsaemifolium)
Synonym
Apocynum pumilum var. rhomboideum
(Under Apocynum androsaemifolium)
Synonym
Apocynum rhomboideum
(Under Apocynum androsaemifolium)
Synonym
Apocynum sibiricum var. salignum
(Under Apocynum cannabinum)
Synonym
Apocynum viarum
(Under Apocynum androsaemifolium)
Synonym
ApodanthaceaeSTEMSUCKER FAMILY
Aponogeton
Aponogeton distachyon
(Under Aponogeton distachyos)
Orthographic variant
Aponogeton distachyosCAPE-PONDWEEDNaturalized
AponogetonaceaeCAPE-PONDWEED FAMILY
Aptenia
Aptenia cordifoliaBABY SUN-ROSENaturalized
AquifoliaceaeHOLLY FAMILY
Aquilegia
  ↳  Key to Aquilegia
COLUMBINE
Aquilegia eximiaNative
Aquilegia fontinalis
(Under Aquilegia eximia)
Synonym
Aquilegia formosaNative
Aquilegia formosa f. anomala
(Under Aquilegia formosa)
Synonym
Aquilegia formosa var. caelifax
(Under Aquilegia shockleyi)
Synonym
Aquilegia formosa var. hypolasia
(Under Aquilegia formosa)
Synonym
Aquilegia formosa var. pauciflora
(Under Aquilegia formosa)
Synonym
Aquilegia formosa var. truncata
(Under Aquilegia formosa)
Synonym
Aquilegia mohavensis
(Under Aquilegia shockleyi)
Synonym
Aquilegia pubescensNative
Aquilegia shockleyiNative
Aquilegia tracyi
(Under Aquilegia eximia)
Synonym
Arabidopsis
Arabidopsis thalianaMOUSE-EAR CRESS, THALE CRESSNaturalized
Arabis
  ↳  Key to Arabis
ROCKCRESS
Arabis ×divaricarpa
(Under Boechera divaricarpa)
Synonym
Arabis arcuata var. rubicundula
(Under Boechera rubicundula)
Synonym
Arabis blepharophyllaCOAST ROCKCRESSNative
Arabis blepharophylla var. macdonaldiana
(Under Arabis mcdonaldiana)
Synonym
Arabis bodiensis
(Under Boechera bodiensis)
Synonym
Arabis breweri
(Under Boechera breweri)
Synonym
Arabis breweri var. austiniae
(Under Boechera breweri subsp. shastaensis)
Synonym
Arabis breweri var. breweri
(Under Boechera breweri subsp. breweri)
Synonym
Arabis breweri var. pecuniaria
(Under Boechera peirsonii)
Synonym
Arabis cobrensis
(Under Boechera cobrensis)
Synonym
Arabis constancei
(Under Boechera constancei)
Synonym
Arabis davidsonii
(Under Boechera davidsonii)
Synonym
Arabis davidsonii var. parva
(Under Boechera davidsonii)
Synonym
Arabis dispar
(Under Boechera dispar)
Synonym
Arabis divaricarpa
(Under Boechera divaricarpa)
Synonym
Arabis divaricarpa var. interposita
(Under Boechera acutina)
Synonym
Arabis drummondii
(Under Boechera stricta)
Synonym
Arabis eschscholtzianaNative
Arabis fernaldiana var. stylosa
(Under Boechera evadens)
Synonym
Arabis glabra
(Under Turritis glabra)
Synonym
Arabis glabra var. furcatipilis
(Under Turritis glabra)
Synonym
Arabis glaucovalvula
(Under Boechera glaucovalvula)
Synonym
Arabis hirshbergiae
(Under Boechera johnstonii)
Synonym
Arabis hirsuta subsp. pycnocarpa
(Under Arabis pycnocarpa var. pycnocarpa)
Synonym
Arabis hirsuta var. eschscholtziana
(Under Arabis eschscholtziana)
Synonym
Arabis hirsuta var. glabrata
(Under Arabis eschscholtziana)
Synonym
Arabis hirsuta var. pycnocarpa
(Under Arabis pycnocarpa var. pycnocarpa)
Synonym
Arabis hoffmannii
(Under Boechera hoffmannii)
Synonym
Arabis holboellii var. pendulocarpa
(Under Boechera pendulocarpa)
Synonym
Arabis holboellii var. pinetorum
(Under Boechera pinetorum)
Synonym
Arabis holboellii var. retrofracta
(Under Boechera retrofracta)
Synonym
Arabis inyoensis
(Under Boechera inyoensis)
Synonym
Arabis johnstonii
(Under Boechera johnstonii)
Synonym
Arabis koehleri
(Under Boechera koehleri)
Synonym
Arabis koehleri var. stipitata
(Under Boechera koehleri)
Synonym
Arabis lemmonii
(Under Boechera lemmonii)
Synonym
Arabis lemmonii var. depauperata
(Under Boechera depauperata)
Synonym
Arabis lemmonii var. lemmonii
(Under Boechera lemmonii)
Synonym
Arabis lyallii
(Under Boechera lyallii)
Synonym
Arabis lyallii var. nubigena
(Under Boechera paupercula)
Synonym
Arabis macdonaldiana
(Under Arabis mcdonaldiana)
Orthographic variant
Arabis mcdonaldianaMCDONALD'S ROCKCRESSNative
Arabis microphylla var. microphylla
(Under Boechera paupercula)
Misapplied name
Arabis modestaMODEST ROCKCRESSNative
Arabis oreganaOREGON ROCKCRESSNative
Arabis parishii
(Under Boechera parishii)
Synonym
Arabis paupercula
(Under Boechera paupercula)
Synonym
Arabis pendulina
(Under Boechera pendulina)
Synonym
Arabis pendulocarpa
(Under Boechera pendulocarpa)
Synonym
Arabis perennans
(Under Boechera perennans)
Synonym
Arabis pinzlae
(Under Boechera pinzliae)
Orthographic variant
Arabis pinzliae
(Under Boechera pinzliae)
Synonym
Arabis platysperma
(Under Boechera platysperma)
Synonym
Arabis platysperma var. howellii
(Under Boechera howellii)
Synonym
Arabis platysperma var. platysperma
(Under Boechera elkoensis)
Synonym, in part
Arabis pratincola
(Under Boechera pratincola)
Synonym
Arabis puberula
(Under Boechera puberula)
Synonym
Arabis pulchra
(Under Boechera pulchra)
Synonym
Arabis pulchra var. gracilis
(Under Boechera xylopoda)
Synonym
Arabis pulchra var. munciensis
(Under Boechera lincolnensis)
Synonym
Arabis pulchra var. pulchra
(Under Boechera pulchra)
Synonym
Arabis pycnocarpa var. pycnocarpaNative
Arabis pygmaea
(Under Boechera pygmaea)
Synonym
Arabis rectissima
(Under Boechera rectissima)
Synonym
Arabis rectissima var. rectissima
(Under Boechera rectissima)
Synonym
Arabis repanda
(Under Boechera repanda)
Synonym
Arabis repanda var. greenei
(Under Boechera repanda)
Synonym
Arabis repanda var. repanda
(Under Boechera repanda)
Synonym
Arabis retrofracta
(Under Boechera retrofracta)
Synonym
Arabis rigidissima
(Under Boechera rigidissima)
Synonym
Arabis rigidissima var. demota
(Under Boechera rigidissima)
Synonym
Arabis rigidissima var. rigidissima
(Under Boechera rigidissima)
Synonym
Arabis rollei
(Under Boechera rollei)
Synonym
Arabis serpentinicola
(Under Arabis mcdonaldiana)
Synonym
Arabis shockleyi
(Under Boechera shockleyi)
Synonym
Arabis sparsiflora
(Under Boechera sparsiflora)
Synonym
Arabis sparsiflora var. arcuata
(Under Boechera arcuata)
Synonym
Arabis sparsiflora var. californica
(Under Boechera californica)
Synonym
Arabis sparsiflora var. sparsiflora
(Under Boechera sparsiflora)
Synonym
Arabis sparsiflora var. subvillosa
(Under Boechera pauciflora)
Synonym
Arabis subpinnatifida
(Under Boechera subpinnatifida)
Synonym
Arabis suffrutescens
(Under Boechera suffrutescens)
Synonym
Arabis suffrutescens var. suffrutescens
(Under Boechera suffrutescens)
Synonym
Arabis tiehmii
(Under Boechera tiehmii)
Synonym
Araceae
  ↳  Key to Araceae
ARUM FAMILY
AraliaSPIKENARD
Aralia californicaELK CLOVERNative
Araliaceae
  ↳  Key to Araliaceae
GINSENG FAMILY
AraujiaBLADDER-FLOWER
Araujia sericiferaNaturalized
ArbutusMADRONE
Arbutus menziesiiPACIFIC MADRONENative
Arceuthobium
  ↳  Key to Arceuthobium
DWARF MISTLETOE
Arceuthobium abietinum
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium americanumLODGEPOLE-PINE DWARF MISTLETOENative
Arceuthobium californicum
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium campylopodumWESTERN DWARF MISTLETOENative
Arceuthobium cyanocarpum
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium divaricatum
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium douglasiiDOUGLAS-FIR DWARF MISTLETOENative
Arceuthobium littorum
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium monticola
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium occidentale
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium siskiyouense
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium tsugense
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium tsugense subsp. contortae
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium tsugense subsp. mertensianae
(Under Arceuthobium campylopodum)
Synonym
Arceuthobium tsugense subsp. tsugense
(Under Arceuthobium campylopodum)
Synonym
Arctium
  ↳  Key to Arctium
BURDOCK
Arctium lappaNaturalized
Arctium minusNaturalized
Arctomecon
Arctomecon merriamiiWHITE BEAR POPPYNative
Arctostaphylos
  ↳  Key to Arctostaphylos
MANZANITA
Arctostaphylos ×knightii
(Under Arctostaphylos nevadensis subsp. knightii)
Synonym
Arctostaphylos ×pacifica
(Under Arctostaphylos pacifica)
Synonym
Arctostaphylos acuta
(Under Arctostaphylos hookeri subsp. hookeri)
Synonym
Arctostaphylos acutifolia
(Under Arctostaphylos patula)
Synonym
Arctostaphylos andersoniiANDERSON'S MANZANITANative
Arctostaphylos andersonii var. auriculata
(Under Arctostaphylos auriculata)
Synonym
Arctostaphylos andersonii var. imbricata
(Under Arctostaphylos imbricata)
Synonym
Arctostaphylos andersonii var. pajaroensis
(Under Arctostaphylos pajaroensis)
Synonym
Arctostaphylos andersonii var. pallida
(Under Arctostaphylos pallida)
Synonym
Arctostaphylos andersonii var. pechoensis
(Under Arctostaphylos pechoensis)
Synonym
Arctostaphylos auriculataMOUNT DIABLO MANZANITANative
Arctostaphylos bakeriNative
Arctostaphylos bakeri subsp. bakeriBAKER'S MANZANITANative
Arctostaphylos bakeri subsp. sublaevisTHE CEDARS MANZANITANative
Arctostaphylos bowermaniae
(Under Arctostaphylos manzanita subsp. manzanita)
Synonym
Arctostaphylos candidissima
(Under Arctostaphylos canescens subsp. canescens)
Synonym
Arctostaphylos canescensNative
Arctostaphylos canescens subsp. canescensHOARY MANZANITANative
Arctostaphylos canescens subsp. malloryi
(Under Arctostaphylos malloryi)
Synonym
Arctostaphylos canescens subsp. sonomensisSONOMA CANESCENT MANZANITANative
Arctostaphylos canescens var. candidissima
(Under Arctostaphylos canescens subsp. canescens)
Synonym
Arctostaphylos catalinaeSANTA CATALINA ISLAND MANZANITANative
Arctostaphylos chaloneorum
(Under Arctostaphylos pungens)
Synonym
Arctostaphylos cinerea
(Under Arctostaphylos canescens subsp. canescens)
Synonym, in part
Arctostaphylos columbianaCOLUMBIA MANZANITANative
Arctostaphylos columbiana f. tracyi
(Under Arctostaphylos columbiana)
Synonym
Arctostaphylos columbiana subsp. nortensis
(Under Arctostaphylos nortensis)
Synonym
Arctostaphylos columbiana var. tracyi
(Under Arctostaphylos columbiana)
Synonym
Arctostaphylos columbiana var. virgata
(Under Arctostaphylos virgata)
Synonym
Arctostaphylos confertifloraSANTA ROSA ISLAND MANZANITANative
Arctostaphylos crustaceaNative
Arctostaphylos crustacea subsp. crinitaCRINITE MANZANITANative
Arctostaphylos crustacea subsp. crustaceaNative
Arctostaphylos crustacea subsp. eastwoodianaEASTWOOD'S BRITTLE-LEAF MANZANITANative
Arctostaphylos crustacea subsp. insulicolaISLAND MANZANITANative
Arctostaphylos crustacea subsp. roseiROSE'S MANZANITANative
Arctostaphylos crustacea subsp. subcordataSANTA CRUZ ISLAND MANZANITANative
Arctostaphylos cruzensisARROYO DE LA CRUZ MANZANITANative
Arctostaphylos cushingiana
(Under Arctostaphylos glandulosa subsp. cushingiana)
Synonym
Arctostaphylos densifloraVINE HILL MANZANITANative
Arctostaphylos drupacea
(Under Arctostaphylos pringlei subsp. drupacea)
Synonym
Arctostaphylos edmundsiiLITTLE SUR MANZANITANative
Arctostaphylos elegans
(Under Arctostaphylos manzanita subsp. elegans)
Synonym
Arctostaphylos franciscanaFRANCISCAN MANZANITANative
Arctostaphylos gabilanensisGABILAN MOUNTAINS MANZANITANative
Arctostaphylos gabrielensis
(Under Arctostaphylos glandulosa subsp. gabrielensis)
Synonym
Arctostaphylos glandulosaNative
Arctostaphylos glandulosa f. cushingiana
(Under Arctostaphylos glandulosa subsp. cushingiana)
Synonym
Arctostaphylos glandulosa subsp. adamsiiNative
Arctostaphylos glandulosa subsp. crassifoliaDEL MAR MANZANITANative
Arctostaphylos glandulosa subsp. cushingianaCUSHING MANZANITANative
Arctostaphylos glandulosa subsp. gabrielensisSAN GABRIEL MANZANITANative
Arctostaphylos glandulosa subsp. glandulosaNative
Arctostaphylos glandulosa subsp. glaucomollis
(Under Arctostaphylos glandulosa subsp. mollis)
Synonym
Arctostaphylos glandulosa subsp. howelliiNative
Arctostaphylos glandulosa subsp. leucophyllaNative
Arctostaphylos glandulosa subsp. mollisNative
Arctostaphylos glandulosa subsp. zacaensis
(Under Arctostaphylos glandulosa subsp. glandulosa)
Synonym
Arctostaphylos glandulosa var. australis
(Under Arctostaphylos glandulosa subsp. glandulosa)
Synonym
Arctostaphylos glandulosa var. cushingiana
(Under Arctostaphylos glandulosa subsp. cushingiana)
Synonym
Arctostaphylos glandulosa var. howellii
(Under Arctostaphylos glandulosa subsp. howellii)
Synonym
Arctostaphylos glandulosa var. mollis
(Under Arctostaphylos glandulosa subsp. mollis)
Synonym
Arctostaphylos glandulosa var. virgata
(Under Arctostaphylos virgata)
Synonym
Arctostaphylos glaucaNative
Arctostaphylos glauca var. eremicola
(Under Arctostaphylos glauca)
Synonym
Arctostaphylos glauca var. puberula
(Under Arctostaphylos glauca)
Synonym
Arctostaphylos glutinosaSCHREIBER'S MANZANITANative
Arctostaphylos hearstiorum
(Under Arctostaphylos hookeri subsp. hearstiorum)
Synonym
Arctostaphylos hispidulaHOWELL'S MANZANITANative
Arctostaphylos hookeriNative
Arctostaphylos hookeri subsp. franciscana
(Under Arctostaphylos franciscana)
Synonym
Arctostaphylos hookeri subsp. hearstiorumHEARSTS' MANZANITANative
Arctostaphylos hookeri subsp. hookeriHOOKER'S MANZANITANative
Arctostaphylos hookeri subsp. montana
(Under Arctostaphylos montana subsp. montana)
Synonym
Arctostaphylos hookeri subsp. ravenii
(Under Arctostaphylos montana subsp. ravenii)
Synonym
Arctostaphylos hooveriHOOVER'S MANZANITANative
Arctostaphylos howellii
(Under Arctostaphylos glandulosa subsp. howellii)
Synonym
Arctostaphylos imbricataSAN BRUNO MOUNTAIN MANZANITANative
Arctostaphylos imbricata subsp. montaraensis
(Under Arctostaphylos montaraensis)
Synonym
Arctostaphylos insularisNative
Arctostaphylos insularis var. pubescens
(Under Arctostaphylos insularis)
Synonym
Arctostaphylos klamathensisKLAMATH MANZANITANative
Arctostaphylos laevigata
(Under Arctostaphylos manzanita subsp. laevigata)
Synonym
Arctostaphylos lucianaSANTA LUCIA MANZANITANative
Arctostaphylos malloryiMALLORY'S MANZANITANative
Arctostaphylos manzanitaNative
Arctostaphylos manzanita subsp. bakeri
(Under Arctostaphylos bakeri subsp. bakeri)
Synonym
Arctostaphylos manzanita subsp. elegansKONOCTI MANZANITANative
Arctostaphylos manzanita subsp. glaucescensNative
Arctostaphylos manzanita subsp. laevigataCONTRA COSTA MANZANITANative
Arctostaphylos manzanita subsp. manzanitaNative
Arctostaphylos manzanita subsp. roofiiNative
Arctostaphylos manzanita subsp. wieslanderiNative
Arctostaphylos manzanita var. elegans
(Under Arctostaphylos manzanita subsp. elegans)
Synonym
Arctostaphylos mariposa
(Under Arctostaphylos viscida subsp. mariposa)
Synonym
Arctostaphylos mendocinoensis
(Under Arctostaphylos nummularia subsp. mendocinoensis)
Synonym
Arctostaphylos mewukkaNative
Arctostaphylos mewukka subsp. mewukkaNative
Arctostaphylos mewukka subsp. trueiTRUE'S MANZANITANative
Arctostaphylos montanaNative
Arctostaphylos montana subsp. montanaMOUNT TAMALPAIS MANZANITANative
Arctostaphylos montana subsp. raveniiPRESIDIO MANZANITANative
Arctostaphylos montaraensisMONTARA MANZANITANative
Arctostaphylos montereyensisTORO MANZANITANative
Arctostaphylos morroensisMORRO MANZANITANative
Arctostaphylos myrtifoliaIONE MANZANITANative
Arctostaphylos nevadensisNative
Arctostaphylos nevadensis subsp. knightiiKNIGHT'S MANZANITANative
Arctostaphylos nevadensis subsp. nevadensisPINE-MAT MANZANITANative
Arctostaphylos nissenanaNISSENAN MANZANITANative
Arctostaphylos nissenana var. arcana
(Under Arctostaphylos nissenana)
Synonym
Arctostaphylos nortensisDEL NORTE MANZANITANative
Arctostaphylos nummulariaNative
Arctostaphylos nummularia subsp. mendocinoensisPYGMY MANZANITANative
Arctostaphylos nummularia subsp. nummulariaNative
Arctostaphylos nummularia subsp. sensitiva
(Under Arctostaphylos sensitiva)
Synonym
Arctostaphylos nummularia var. myrtifolia
(Under Arctostaphylos myrtifolia)
Synonym
Arctostaphylos nummularia var. sensitiva
(Under Arctostaphylos sensitiva)
Synonym
Arctostaphylos obispoensisBISHOP MANZANITANative
Arctostaphylos ohloneanaOHLONE MANZANITANative
Arctostaphylos osoensisOSO MANZANITANative
Arctostaphylos otayensisOTAY MANZANITANative
Arctostaphylos pacificaPACIFIC MANZANITANative
Arctostaphylos pajaroensisPAJARO MANZANITANative
Arctostaphylos pallidaPALLID MANZANITANative
Arctostaphylos parryanaNative
Arctostaphylos parryana subsp. deserticaDESERT MANZANITANative
Arctostaphylos parryana subsp. parryanaPARRY MANZANITANative
Arctostaphylos parryana subsp. tumescensINTERIOR MANZANITANative
Arctostaphylos parryana var. pinetorum
(Under Arctostaphylos patula)
Synonym
Arctostaphylos patulaGREENLEAF MANZANITANative
Arctostaphylos patula subsp. gankiniiGANKIN'S GREENLEAF MANZANITANative
Arctostaphylos patula subsp. patulaGREENLEAF MANZANITANative
Arctostaphylos pechoensisPECHO MANZANITANative
Arctostaphylos pechoensis var. cruzensis
(Under Arctostaphylos cruzensis)
Synonym
Arctostaphylos pechoensis var. viridissima
(Under Arctostaphylos viridissima)
Synonym
Arctostaphylos pilosulaSANTA MARGARITA MANZANITANative
Arctostaphylos pilosula subsp. pismoensis
(Under Arctostaphylos pilosula)
Synonym
Arctostaphylos pringlei subsp. drupaceaNative
Arctostaphylos pseudopungens
(Under Arctostaphylos pungens)
Synonym
Arctostaphylos pulchella
(Under Arctostaphylos viscida subsp. pulchella)
Synonym
Arctostaphylos pumilaSANDMAT MANZANITANative
Arctostaphylos pungensNative
Arctostaphylos pungens subsp. bakeri
(Under Arctostaphylos bakeri subsp. bakeri)
Synonym
Arctostaphylos pungens subsp. chaloneorum
(Under Arctostaphylos pungens)
Synonym
Arctostaphylos pungens subsp. elegans
(Under Arctostaphylos manzanita subsp. elegans)
Synonym
Arctostaphylos pungens subsp. laevigata
(Under Arctostaphylos manzanita subsp. laevigata)
Synonym
Arctostaphylos pungens subsp. roofii
(Under Arctostaphylos manzanita subsp. roofii)
Synonym
Arctostaphylos pungens var. montana
(Under Arctostaphylos montana subsp. montana)
Synonym
Arctostaphylos pungens var. platyphylla
(Under Arctostaphylos patula)
Synonym
Arctostaphylos purissimaLA PURISIMA MANZANITANative
Arctostaphylos purissima subsp. globosaGLOBOSE MANZANITANative
Arctostaphylos purissima subsp. purissimaLA PURISIMA MANZANITANative
Arctostaphylos rainbowensisRAINBOW MANZANITANative
Arctostaphylos refugioensisREFUGIO MANZANITANative
Arctostaphylos regismontanaKINGS MOUNTAIN MANZANITANative
Arctostaphylos roofii
(Under Arctostaphylos manzanita subsp. roofii)
Synonym
Arctostaphylos rosei
(Under Arctostaphylos crustacea subsp. rosei)
Synonym
Arctostaphylos rudisSAND MESA MANZANITANative
Arctostaphylos sensitivaNative
Arctostaphylos serpentinicola
(Under Arctostaphylos viscida subsp. pulchella)
Synonym
Arctostaphylos silvicolaBONNY DOON MANZANITANative
Arctostaphylos sonomensis
(Under Arctostaphylos canescens subsp. sonomensis)
Synonym
Arctostaphylos stanfordianaNative
Arctostaphylos stanfordiana subsp. bakeri
(Under Arctostaphylos bakeri subsp. bakeri)
Synonym
Arctostaphylos stanfordiana subsp. decumbensRINCON RIDGE MANZANITANative
Arctostaphylos stanfordiana subsp. hispidula
(Under Arctostaphylos hispidula)
Synonym
Arctostaphylos stanfordiana subsp. raicheiRAICHE'S MANZANITANative
Arctostaphylos stanfordiana subsp. stanfordianaNative
Arctostaphylos stanfordiana var. repens
(Under Arctostaphylos stanfordiana subsp. decumbens)
Synonym
Arctostaphylos subcordata var. confertiflora
(Under Arctostaphylos confertiflora)
Synonym
Arctostaphylos tomentosaNative
Arctostaphylos tomentosa subsp. bracteosaNative
Arctostaphylos tomentosa subsp. crinita
(Under Arctostaphylos crustacea subsp. crinita)
Synonym
Arctostaphylos tomentosa subsp. crustacea
(Under Arctostaphylos crustacea subsp. crustacea)
Synonym
Arctostaphylos tomentosa subsp. daciticolaDACITE MANZANITANative
Arctostaphylos tomentosa subsp. eastwoodiana
(Under Arctostaphylos crustacea subsp. eastwoodiana)
Synonym
Arctostaphylos tomentosa subsp. hebecladaNative
Arctostaphylos tomentosa subsp. insulicola
(Under Arctostaphylos crustacea subsp. insulicola)
Synonym
Arctostaphylos tomentosa subsp. rosei
(Under Arctostaphylos crustacea subsp. rosei)
Synonym
Arctostaphylos tomentosa subsp. subcordata
(Under Arctostaphylos crustacea subsp. subcordata)
Synonym
Arctostaphylos tomentosa subsp. tomentosaNative
Arctostaphylos tomentosa var. crassifolia
(Under Arctostaphylos glandulosa subsp. crassifolia)
Synonym
Arctostaphylos tomentosa var. crinita
(Under Arctostaphylos crustacea subsp. crinita)
Synonym
Arctostaphylos tomentosa var. hebeclada
(Under Arctostaphylos tomentosa subsp. bracteosa)
Synonym
Arctostaphylos tomentosa var. hebeclada
(Under Arctostaphylos tomentosa subsp. hebeclada)
Synonym
Arctostaphylos tomentosa var. trichoclada
(Under Arctostaphylos tomentosa subsp. bracteosa)
Synonym
Arctostaphylos tracyi
(Under Arctostaphylos columbiana)
Synonym
Arctostaphylos truei
(Under Arctostaphylos mewukka subsp. truei)
Synonym
Arctostaphylos uva-ursiBEAR-BERRY, KINNIKINNICKNative
Arctostaphylos uva-ursi f. adenotricha
(Under Arctostaphylos uva-ursi)
Synonym
Arctostaphylos uva-ursi f. coactilis
(Under Arctostaphylos uva-ursi)
Synonym
Arctostaphylos uva-ursi subsp. adenotricha
(Under Arctostaphylos uva-ursi)
Synonym
Arctostaphylos uva-ursi subsp. coactilis
(Under Arctostaphylos uva-ursi)
Synonym
Arctostaphylos uva-ursi subsp. hookeri
(Under Arctostaphylos hookeri subsp. hookeri)
Synonym
Arctostaphylos uva-ursi subsp. monoensis
(Under Arctostaphylos uva-ursi)
Synonym
Arctostaphylos uva-ursi var. coactilis
(Under Arctostaphylos uva-ursi)
Synonym
Arctostaphylos uva-ursi var. leobreweri
(Under Arctostaphylos uva-ursi)
Synonym
Arctostaphylos uva-ursi var. marinensis
(Under Arctostaphylos uva-ursi)
Synonym
Arctostaphylos uva-ursi var. saxicola
(Under Arctostaphylos pacifica)
Synonym
Arctostaphylos virgataMARIN MANZANITANative
Arctostaphylos viridissimaWHITE-HAIRED MANZANITANative
Arctostaphylos viscidaNative
Arctostaphylos viscida subsp. mariposaMARIPOSA MANZANITANative
Arctostaphylos viscida subsp. pulchellaNative
Arctostaphylos viscida subsp. viscidaNative
Arctostaphylos viscosissima
(Under Arctostaphylos hispidula)
Synonym
Arctostaphylos wellsii
(Under Arctostaphylos pilosula)
Synonym
Arctostaphylos zacaensis
(Under Arctostaphylos glandulosa subsp. glandulosa)
Synonym
Arctotheca
  ↳  Key to Arctotheca
Arctotheca calendulaCAPEWEEDNaturalized
Arctotheca calendula
(Under Arctotheca prostrata)
Misapplied name, in part
Arctotheca prostrataPROSTRATE CAPEWEEDNaturalized
Arctotis
Arctotis stoechadifolia
(Under Arctotis venusta)
Misapplied name
Arctotis venustaBLUE-EYED AFRICAN DAISYNaturalized
Arecaceae (Palmae)
  ↳  Key to Arecaceae (Palmae)
PALM FAMILY
Arenaria
  ↳  Key to Arenaria
Arenaria aculeata
(Under Eremogone aculeata)
Synonym
Arenaria californica
(Under Sabulina californica)
Synonym
Arenaria confusa
(Under Arenaria lanuginosa var. saxosa)
Synonym
Arenaria congesta
(Under Eremogone congesta)
Synonym
Arenaria congesta var. charlestonensis
(Under Eremogone congesta var. charlestonensis)
Synonym
Arenaria congesta var. congesta
(Under Eremogone congesta var. congesta)
Synonym
Arenaria congesta var. crassula
(Under Eremogone congesta var. crassula)
Synonym
Arenaria congesta var. simulans
(Under Eremogone congesta var. simulans)
Synonym
Arenaria congesta var. subcongesta
(Under Eremogone congesta var. subcongesta)
Synonym
Arenaria congesta var. suffrutescens
(Under Eremogone congesta var. suffrutescens)
Synonym
Arenaria douglasii
(Under Sabulina douglasii)
Synonym
Arenaria douglasii var. emarginata
(Under Sabulina douglasii)
Synonym
Arenaria howellii
(Under Sabulina howellii)
Synonym
Arenaria kingii subsp. compacta
(Under Eremogone kingii var. glabrescens)
Synonym
Arenaria kingii var. glabrescens
(Under Eremogone kingii var. glabrescens)
Synonym
Arenaria lanuginosa subsp. saxosa
(Under Arenaria lanuginosa var. saxosa)
Synonym
Arenaria lanuginosa var. saxosaROCK SANDWORT, SPREADING SANDWORTNative
Arenaria macradenia
(Under Eremogone macradenia)
Synonym
Arenaria macradenia subsp. ferrisiae
(Under Eremogone ferrisiae)
Synonym
Arenaria macradenia var. arcuifolia
(Under Eremogone macradenia var. arcuifolia)
Synonym
Arenaria macradenia var. kuschei
(Under Eremogone macradenia var. arcuifolia)
Synonym
Arenaria macradenia var. macradenia
(Under Eremogone macradenia var. macradenia)
Synonym
Arenaria macradenia var. parishiorum
(Under Eremogone macradenia var. macradenia)
Synonym
Arenaria macrophylla
(Under Moehringia macrophylla)
Synonym
Arenaria nuttallii
(Under Sabulina nuttallii)
Synonym
Arenaria nuttallii subsp. fragilis
(Under Sabulina nuttallii var. fragilis)
Synonym
Arenaria nuttallii subsp. gracilis
(Under Sabulina nuttallii var. gracilis)
Synonym
Arenaria nuttallii subsp. gregaria
(Under Sabulina nuttallii var. gregaria)
Synonym
Arenaria obtusiloba
(Under Cherleria biflora)
Misapplied name
Arenaria paludicolaMARSH SANDWORTNative
Arenaria pumicola var. californica
(Under Eremogone kingii var. glabrescens)
Synonym
Arenaria pusilla
(Under Sabulina pusilla)
Synonym
Arenaria pusilla var. diffusa
(Under Sabulina californica)
Synonym
Arenaria rosei
(Under Sabulina rosei)
Synonym
Arenaria rubella
(Under Sabulina rubella)
Synonym
Arenaria serpyllifolia subsp. serpyllifolia
(Under Arenaria serpyllifolia var. serpyllifolia)
Synonym
Arenaria serpyllifolia var. serpyllifoliaTHYMELEAF SANDWORTNaturalized
Arenaria ursina
(Under Eremogone ursina)
Synonym
Argemone
  ↳  Key to Argemone
PRICKLY POPPY
Argemone corymbosaNative
Argemone munitaCHICALOTENative
Argemone munita subsp. argentea
(Under Argemone munita)
Synonym
Argemone munita subsp. robusta
(Under Argemone munita)
Synonym
Argemone munita subsp. rotundata
(Under Argemone munita)
Synonym
Argyranthemum
Argyranthemum foeniculaceumNaturalized
Argyrochosma
  ↳  Key to Argyrochosma
Argyrochosma jonesiiJONES' FALSE CLOAK-FERNNative
Argyrochosma limitanea subsp. limitaneaSOUTHWESTERN FALSE CLOAK-FERNNative
Argyrochosma limitanea var. limitanea
(Under Argyrochosma limitanea subsp. limitanea)
Synonym ined.
Argythamnia californica
(Under Ditaxis serrata var. californica)
Synonym
Argythamnia clariana
(Under Ditaxis claryana)
Orthographic variant
Argythamnia claryana
(Under Ditaxis claryana)
Synonym
Argythamnia lanceolata
(Under Ditaxis lanceolata)
Synonym
Argythamnia neomexicana
(Under Ditaxis neomexicana)
Synonym
Arida arizonica
(Under Leucosyris arida)
Synonym
Arida carnosa
(Under Leucosyris carnosa)
Synonym
Aristida
  ↳  Key to Aristida
THREE-AWN
Aristida adscensionisSIXWEEKS THREE-AWNNative
Aristida californicaCALIFORNIA THREE-AWN, MOJAVE THREE-AWNNative
Aristida dichotomaCHURCHMOUSE THREE-AWNNaturalized
Aristida divaricataPOVERTY THREE-AWNNative
Aristida fendleriana
(Under Aristida purpurea var. fendleriana)
Synonym
Aristida glauca
(Under Aristida purpurea var. nealleyi)
Synonym
Aristida hamulosa
(Under Aristida ternipes var. gentilis)
Synonym
Aristida longiseta
(Under Aristida purpurea var. longiseta)
Synonym
Aristida oliganthaOLDFIELD THREE-AWNNative
Aristida parishii
(Under Aristida purpurea var. parishii)
Synonym
Aristida purpureaNative
Aristida purpurea var. fendlerianaFENDLER THREE-AWNNative
Aristida purpurea var. longisetaRED THREE-AWNNative
Aristida purpurea var. nealleyiNEALLEY THREE-AWNNative
Aristida purpurea var. parishiiPARISH THREE-AWNNative
Aristida purpurea var. purpureaPURPLE THREE-AWNNative
Aristida purpurea var. robusta
(Under Aristida purpurea var. longiseta)
Synonym
Aristida purpurea var. wrightiiWRIGHT THREE-AWNNative
Aristida ternipes var. gentilisHOOK THREE-AWNNative
Aristida ternipes var. hamulosa
(Under Aristida ternipes var. gentilis)
Illegitimate name
Aristida wrightii
(Under Aristida purpurea var. wrightii)
Synonym
Aristocapsa
Aristocapsa insignisINDIAN VALLEY SPINEFLOWERNative
AristolochiaPIPEVINE, BIRTHWORT
Aristolochia californicaNative
Aristolochiaceae
  ↳  Key to Aristolochiaceae
PIPEVINE FAMILY
ArmeriaTHRIFT, SEA-PINK
Armeria maritima subsp. californicaNative
Armeria maritima var. californica
(Under Armeria maritima subsp. californica)
Synonym
Armoracia
Armoracia rusticanaHORSE RADISHNaturalized
Arnica
  ↳  Key to Arnica
Arnica ×diversifolia
(Under Arnica ovata)
Synonym
Arnica amplexicaulis
(Under Arnica lanceolata subsp. prima)
Synonym
Arnica bernardina
(Under Arnica chamissonis)
Synonym
Arnica cernuaSERPENTINE ARNICANative
Arnica chamissonisCHAMISSO ARNICANative
Arnica chamissonis subsp. foliosa
(Under Arnica chamissonis)
Synonym
Arnica chamissonis var. bernardina
(Under Arnica chamissonis)
Synonym
Arnica cordifoliaHEARTLEAF ARNICANative
Arnica dealbataMOCK LEOPARDBANENative
Arnica discoideaRAYLESS ARNICANative
Arnica discoidea var. alata
(Under Arnica discoidea)
Synonym
Arnica discoidea var. eradiata
(Under Arnica discoidea)
Synonym
Arnica diversifolia
(Under Arnica ovata)
Synonym
Arnica fulgensHILLSIDE ARNICANative
Arnica lanceolata subsp. primaCLASPING ARNICANative
Arnica latifoliaBROADLEAF ARNICANative
Arnica longifoliaSPEARLEAF ARNICANative
Arnica longifolia subsp. myriadenia
(Under Arnica longifolia)
Synonym
Arnica mollisHAIRY ARNICANative
Arnica nevadensisSIERRA ARNICANative
Arnica ovataSTICKY LEAF ARNICANative
Arnica parryiNODDING ARNICANative
Arnica parryi subsp. parryi
(Under Arnica parryi)
Synonym
Arnica parryi subsp. sonnei
(Under Arnica parryi)
Synonym
Arnica sonnei
(Under Arnica parryi)
Synonym
Arnica sororiaTWIN ARNICANative
Arnica spathulataKLAMATH ARNICANative
Arnica spathulata subsp. eastwoodiae
(Under Arnica spathulata)
Synonym
Arnica tomentella
(Under Arnica nevadensis)
Synonym
Arnica venosaSHASTA COUNTY ARNICANative
Arnica viscosaMOUNT SHASTA ARNICANative
ArrhenatherumOAT GRASS
Arrhenatherum elatiusTALL OAT GRASSNaturalized
Arrhenatherum elatius subsp. bulbosum
(Under Arrhenatherum elatius)
Synonym
Arrhenatherum elatius var. biaristatum
(Under Arrhenatherum elatius)
Synonym
Arrhenatherum elatius var. bulbosum
(Under Arrhenatherum elatius)
Synonym
Artemisia
  ↳  Key to Artemisia
MUGWORT, SAGEBRUSH, SAGEWORT
Artemisia annuaSWEET ANNIEWaif
Artemisia arbusculaLOW SAGEBRUSHNative
Artemisia arbuscula subsp. arbusculaNative
Artemisia arbuscula subsp. longilobaNative
Artemisia arbuscula subsp. nova
(Under Artemisia nova)
Synonym
Artemisia arctica
(Under Artemisia norvegica subsp. saxatilis)
Synonym
Artemisia biennisBIENNIAL WORMWOODNaturalized
Artemisia biennis var. biennis
(Under Artemisia biennis)
Synonym
Artemisia bigeloviiBIGELOW SAGEWORTNative
Artemisia bolanderi
(Under Artemisia cana subsp. bolanderi)
Synonym
Artemisia borealis subsp. borealisBOREAL SAGENative
Artemisia californicaCALIFORNIA SAGEBRUSHNative
Artemisia californica var. insularis
(Under Artemisia nesiotica)
Synonym
Artemisia campestris subsp. borealis
(Under Artemisia borealis subsp. borealis)
Synonym
Artemisia cana subsp. bolanderiSILVER SAGEBRUSHNative
Artemisia douglasianaMUGWORTNative
Artemisia dracunculusTARRAGONNative
Artemisia lindleyana
(Under Artemisia ludoviciana subsp. incompta)
Synonym
Artemisia ludovicianaSILVER WORMWOODNative
Artemisia ludoviciana subsp. albulaNative
Artemisia ludoviciana subsp. candicansNative
Artemisia ludoviciana subsp. incomptaNative
Artemisia ludoviciana subsp. ludovicianaNative
Artemisia michauxianaLEMON SAGEWORTNative
Artemisia nesioticaISLAND SAGEBRUSHNative
Artemisia norvegica subsp. saxatilisALPINE SAGEWORTNative
Artemisia novaBLACK SAGEBRUSHNative
Artemisia palmeriSAN DIEGO SAGEWORTNative
Artemisia petrophila
(Under Artemisia bigelovii)
Synonym
Artemisia pycnocephalaCOASTAL SAGEWORTNative
Artemisia rothrockiiROTHROCK SAGEBRUSHNative
Artemisia spiciformisSNOWFIELD SAGEBRUSHNative
Artemisia spinescensBUDSAGENative
Artemisia suksdorfiiCOASTAL MUGWORTNative
Artemisia tridentataNative
Artemisia tridentata subsp. bolanderi
(Under Artemisia cana subsp. bolanderi)
Synonym
Artemisia tridentata subsp. parishiiNative
Artemisia tridentata subsp. tridentataBIG SAGEBRUSHNative
Artemisia tridentata subsp. vaseyanaMOUNTAIN SAGEBRUSHNative
Artemisia tridentata subsp. wyomingensisWYOMING SAGEBRUSHNative
ArthrocnemumPICKLEWEED
Arthrocnemum subterminaleNative
Arum
  ↳  Key to Arum
Arum italicumITALIAN ARUMNaturalized
Arum palaestinumBLACK CALLA, SOLOMON'S LILYWaif
AruncusGOAT'S BEARD
Aruncus acuminatus
(Under Aruncus dioicus var. acuminatus)
Synonym
Aruncus dioicus var. acuminatusNative
Aruncus dioicus var. pubescens
(Under Aruncus dioicus var. acuminatus)
Misapplied name
Arundo
Arundo donaxGIANT REEDNaturalized
Asarum
  ↳  Key to Asarum
WILD-GINGER
Asarum caudatumNative
Asarum hartwegiiNative
Asarum lemmoniiNative
Asarum marmoratumMARBLED WILD-GINGERNative
Asclepias
  ↳  Key to Asclepias
MILKWEED
Asclepias albicansWHITE-STEMMED MILKWEEDNative
Asclepias asperula subsp. asperulaANTELOPE-HORNSNative
Asclepias californicaCALIFORNIA MILKWEEDNative
Asclepias californica subsp. californica
(Under Asclepias californica)
Synonym
Asclepias californica subsp. greenei
(Under Asclepias californica)
Synonym
Asclepias capricornu subsp. occidentalis
(Under Asclepias asperula subsp. asperula)
Synonym
Asclepias cordifoliaPURPLE MILKWEEDNative
Asclepias cryptocerasHUMBOLDT MOUNTAINS MILKWEEDNative
Asclepias cryptoceras subsp. cryptoceras
(Under Asclepias cryptoceras)
Synonym
Asclepias cryptoceras subsp. davisii
(Under Asclepias cryptoceras)
Synonym
Asclepias curassavicaBLOODFLOWER MILKWEED
Asclepias eriocarpaKOTOLONative
Asclepias erosaDESERT MILKWEEDNative
Asclepias fascicularisNARROW-LEAF MILKWEEDNative
Asclepias fruticosaWaif
Asclepias giffordii
(Under Asclepias speciosa)
Synonym
Asclepias latifoliaBROADLEAF MILKWEEDNative
Asclepias nyctaginifoliaMOJAVE MILKWEEDNative
Asclepias solanoanaSERPENTINE MILKWEEDNative
Asclepias speciosaSHOWY MILKWEEDNative
Asclepias subulataRUSH MILKWEEDNative
Asclepias vestitaWOOLLY MILKWEEDNative
Asclepias vestita subsp. parishii
(Under Asclepias vestita)
Synonym
Asclepias vestita subsp. vestita
(Under Asclepias vestita)
Synonym
Asclepias vestita var. parishii
(Under Asclepias vestita)
Synonym
Asclepias vestita var. vestita
(Under Asclepias vestita)
Synonym
AsparagaceaeASPARAGUS FAMILY
Asparagus
  ↳  Key to Asparagus
Asparagus aethiopicusWaif
Asparagus asparagoidesNaturalized
Asparagus densiflorus
(Under Asparagus aethiopicus)
Misapplied name
Asparagus officinalis subsp. officinalisNaturalized
Asparagus setaceusNaturalized
AsperugoMADWORT
Asperugo procumbensNaturalized
Asphodelaceae
  ↳  Key to Asphodelaceae
ASPHODEL FAMILY
AsphodelusASPHODEL
Asphodelus fistulosusNaturalized
Aspidotis
  ↳  Key to Aspidotis
Aspidotis californicaCALIFORNIA LACE FERNNative
Aspidotis carlotta-halliaeCARLOTTA HALL'S LACE FERNNative
Aspidotis densaDENSE LACE FERNNative
AspleniaceaeSPLEENWORT FAMILY
Asplenium
  ↳  Key to Asplenium
SPLEENWORT
Asplenium septentrionaleNORTHERN SPLEENWORTNative
Asplenium trichomanes subsp. trichomanesMAIDENHAIR SPLEENWORTNative
Asplenium trichomanes-ramosum
(Under Asplenium viride)
Synonym
Asplenium vespertinumWESTERN SPLEENWORTNative
Asplenium virideGREEN SPLEENWORTNative
Astephanus utahense
(Under Funastrum utahense)
Synonym
Aster alpigenus var. andersonii
(Under Oreostemma alpigenum var. andersonii)
Synonym
Aster ascendens
(Under Symphyotrichum ascendens)
Synonym
Aster ascendens var. parryi
(Under Symphyotrichum foliaceum var. parryi)
Synonym
Aster bahamensis
(Under Symphyotrichum subulatum var. elongatum)
Synonym
Aster bernardinus
(Under Symphyotrichum defoliatum)
Synonym
Aster bracteolatus
(Under Symphyotrichum bracteolatum)
Synonym
Aster breweri
(Under Doellingeria breweri)
Synonym
Aster brickellioides
(Under Doellingeria tomentella)
Synonym
Aster brickellioides var. glabratus
(Under Doellingeria glabrata)
Synonym
Aster campestris
(Under Symphyotrichum campestre)
Synonym
Aster chilensis
(Under Symphyotrichum chilense)
Synonym
Aster chilensis subsp. ascendens
(Under Symphyotrichum ascendens)
Synonym
Aster chilensis var. bernardinus
(Under Symphyotrichum defoliatum)
Synonym
Aster chilensis var. lentus
(Under Symphyotrichum lentum)
Synonym
Aster chilensis var. medius
(Under Symphyotrichum chilense)
Synonym
Aster chilensis var. sonomensis
(Under Symphyotrichum lentum)
Synonym
Aster cognatus
(Under Xylorhiza cognata)
Synonym
Aster eatonii
(Under Symphyotrichum bracteolatum)
Synonym
Aster elmeri
(Under Erigeron elmeri)
Synonym
Aster engelmannii
(Under Doellingeria engelmannii)
Synonym
Aster foliaceus
(Under Symphyotrichum foliaceum)
Synonym
Aster foliaceus
(Under Symphyotrichum hendersonii)
Synonym
Aster foliaceus var. apricus
(Under Symphyotrichum foliaceum var. apricum)
Synonym
Aster foliaceus var. parryi
(Under Symphyotrichum foliaceum var. parryi)
Synonym
Aster frondosus
(Under Symphyotrichum frondosum)
Synonym
Aster greatae
(Under Symphyotrichum greatae)
Synonym
Aster hendersonii
(Under Symphyotrichum hendersonii)
Synonym
Aster hesperius
(Under Symphyotrichum lanceolatum var. hesperium)
Synonym
Aster integrifolius
(Under Eurybia integrifolia)
Synonym
Aster intricatus
(Under Leucosyris carnosa)
Synonym
Aster lanceolatus subsp. hesperius
(Under Symphyotrichum lanceolatum var. hesperium)
Synonym
Aster ledophyllus var. covillei
(Under Doellingeria ledophylla var. covillei)
Synonym
Aster lentus
(Under Symphyotrichum lentum)
Synonym
Aster lentus var. sonomensis
(Under Symphyotrichum lentum)
Synonym
Aster occidentalis
(Under Symphyotrichum spathulatum)
Synonym
Aster occidentalis var. delectabilis
(Under Symphyotrichum spathulatum var. spathulatum)
Synonym
Aster occidentalis var. intermedius
(Under Symphyotrichum spathulatum var. intermedium)
Synonym
Aster occidentalis var. occidentalis
(Under Symphyotrichum spathulatum var. spathulatum)
Synonym
Aster occidentalis var. parishii
(Under Symphyotrichum spathulatum var. spathulatum)
Synonym
Aster occidentalis var. yosemitanus
(Under Symphyotrichum spathulatum var. yosemitanum)
Synonym
Aster orcuttii
(Under Xylorhiza orcuttii)
Synonym
Aster oregonensis subsp. californicus
(Under Sericocarpus oregonensis subsp. californicus)
Synonym
Aster oregonensis subsp. oregonensis
(Under Sericocarpus oregonensis subsp. oregonensis)
Synonym
Aster paludicola
(Under Symphyotrichum spathulatum var. yosemitanum)
Synonym
Aster pauciflorus
(Under Almutaster pauciflorus)
Synonym
Aster peirsonii
(Under Oreostemma peirsonii)
Synonym
Aster radulinus
(Under Eurybia radulina)
Synonym
Aster scopulorum
(Under Ionactis alpina)
Synonym
Aster sibiricus var. meritus
(Under Eurybia merita)
Synonym
Aster siskiyouensis
(Under Doellingeria glabrata)
Synonym
Aster spathulatus
(Under Symphyotrichum spathulatum)
Synonym
Aster spathulatus var. intermedius
(Under Symphyotrichum spathulatum var. intermedium)
Synonym
Aster spinosus
(Under Chloracantha spinosa var. spinosa)
Synonym
Aster squamatum
(Under Symphyotrichum subulatum var. squamatum)
Synonym
Aster subspicatus
(Under Symphyotrichum subspicatum)
Synonym
Aster subulatus
(Under Symphyotrichum subulatum)
Synonym
Aster subulatus var. cubensis
(Under Symphyotrichum subulatum var. parviflorum)
Synonym
Aster subulatus var. elongatus
(Under Symphyotrichum subulatum var. elongatum)
Synonym
Asteraceae (Compositae)
  ↳  Key to Asteraceae (Compositae)
SUNFLOWER FAMILY
Astragalus
  ↳  Key to Astragalus
LOCOWEED, MILKVETCH
Astragalus accidens var. hendersoniiNative
Astragalus acutirostrisNative
Astragalus agnicidusHUMBOLDT COUNTY MILKVETCHNative
Astragalus agrestisFIELD MILKVETCHNative
Astragalus albensCUSHENBURY MILKVETCHNative
Astragalus allochrous var. playanusPLAYA MILKVETCHNative
Astragalus andersoniiNative
Astragalus antisellii
(Under Astragalus trichopodus var. phoxus)
Synonym
Astragalus antisellii var. gaviotus
(Under Astragalus trichopodus var. phoxus)
Synonym
Astragalus antisellii var. phoxus
(Under Astragalus trichopodus var. phoxus)
Synonym
Astragalus anxiusASH VALLEY MILKVETCHNative
Astragalus argophyllus var. argophyllusSILVER-LEAVED MILKVETCHNative
Astragalus aridusNative
Astragalus asymmetricusNative
Astragalus atratus var. mensanusDARWIN MESA MILKVETCHNative
Astragalus austiniaeNative
Astragalus bernardianus
(Under Astragalus bernardinus)
Orthographic variant
Astragalus bernardinusNative
Astragalus bicristatusCRESTED MILKVETCHNative
Astragalus bolanderiNative
Astragalus brauntoniiBRAUNTON'S MILKVETCHNative
Astragalus breweriBREWER'S MILKVETCHNative
Astragalus californicusKLAMATH MILKVETCHNative
Astragalus calycosus var. calycosusTORREY'S MILKVETCHNative
Astragalus canadensis var. brevidensNative
Astragalus caseiNative
Astragalus cicerCHICKPEA MILKVETCHNaturalized
Astragalus cimae
  ↳  Key to Astragalus cimae
Native
Astragalus cimae var. cimaeCIMA MILKVETCHNative
Astragalus cimae var. sufflatusINFLATED CIMA MILKVETCHNative
Astragalus claranusCLARA HUNT'S MILKVETCHNative
Astragalus clarianus
(Under Astragalus claranus)
Orthographic variant
Astragalus clevelandiiCLEVELAND'S MILKVETCHNative
Astragalus coccineusSCARLET MILKVETCHNative
Astragalus congdoniiNative
Astragalus crotalariaeSALTON MILKVETCHNative
Astragalus curtipesMORRO MILKVETCHNative
Astragalus curvicarpus var. curvicarpusSICKLE MILKVETCHNative
Astragalus deaneiDEAN'S MILKVETCHNative
Astragalus didymocarpus
  ↳  Key to Astragalus didymocarpus
TWO-SEEDED MILKVETCHNative
Astragalus didymocarpus var. daleoides
(Under Astragalus didymocarpus var. didymocarpus)
Synonym
Astragalus didymocarpus var. didymocarpusNative
Astragalus didymocarpus var. dispermusNative
Astragalus didymocarpus var. milesianusMILES' MILKVETCHNative
Astragalus didymocarpus var. obispoensisNative
Astragalus douglasii
  ↳  Key to Astragalus douglasii
DOUGLAS MILKVETCHNative
Astragalus douglasii var. douglasiiNative
Astragalus douglasii var. parishiiNative
Astragalus douglasii var. perstrictusJACUMBA MILKVETCHNative
Astragalus ertteraeWALKER PASS MILKVETCHNative
Astragalus filipesBASALT MILKVETCHNative
Astragalus funereusBLACK MILKVETCHNative
Astragalus gambelianusGAMBEL MILKVETCH, LITTLE BLUE LOCONative
Astragalus geyeri var. geyeriGEYER'S MILKVETCHNative
Astragalus gibbsiiGIBBS' MILKVETCHNative
Astragalus gilmaniiGILMAN'S MILKVETCHNative
Astragalus hornii var. horniiHORN'S MILKVETCHNative
Astragalus insularis var. harwoodiiHARWOOD'S MILKVETCHNative
Astragalus inversusSUSANVILLE MILKVETCHNative
Astragalus inyoensisINYO MILKVETCHNative
Astragalus iodanthus
  ↳  Key to Astragalus iodanthus
Native
Astragalus iodanthus var. diaphanoidesSNAKE MILKVETCHNative
Astragalus iodanthus var. iodanthusHUMBOLDT RIVER MILKVETCHNative
Astragalus iodanthus var. pseudiodanthus
(Under Astragalus pseudiodanthus)
Synonym
Astragalus jaegerianusLANE MOUNTAIN MILKVETCHNative
Astragalus johannis-howelliiLONG VALLEY MILKVETCHNative
Astragalus kentrophyta
  ↳  Key to Astragalus kentrophyta
Native
Astragalus kentrophyta var. danausSWEETWATER MOUNTAINS MILKVETCHNative
Astragalus kentrophyta var. elatusSPINY-LEAVED MILKVETCHNative
Astragalus kentrophyta var. implexus
(Under Astragalus kentrophyta var. tegetarius)
Synonym
Astragalus kentrophyta var. tegetariusNative
Astragalus kentrophyta var. ungulatusSPINY MILKVETCHNative
Astragalus layneaeLAYNE MILKVETCHNative
Astragalus lemmoniiLEMMON'S MILKVETCHNative
Astragalus lentiformisLENS-POD MILKVETCHNative
Astragalus lentiginosus
  ↳  Key to Astragalus lentiginosus
FRECKLED MILKVETCHNative
Astragalus lentiginosus var. albifoliusNative
Astragalus lentiginosus var. antoniusSAN ANTONIO MILKVETCHNative
Astragalus lentiginosus var. borreganusBORREGO MILKVETCHNative
Astragalus lentiginosus var. carinatus
(Under Astragalus lentiginosus var. lentiginosus)
Synonym
Astragalus lentiginosus var. chartaceusNative
Astragalus lentiginosus var. coachellaeCOACHELLA VALLEY MILKVETCHNative
Astragalus lentiginosus var. coulteri
(Under Astragalus lentiginosus var. borreganus)
Synonym
Astragalus lentiginosus var. floribundusNative
Astragalus lentiginosus var. fremontiiFREMONT'S MILKVETCHNative
Astragalus lentiginosus var. idriensisNative
Astragalus lentiginosus var. ineptusNative
Astragalus lentiginosus var. kernensisKERN PLATEAU MILKVETCHNative
Astragalus lentiginosus var. lentiginosusNative
Astragalus lentiginosus var. micansSHINING MILKVETCHNative
Astragalus lentiginosus var. nigricalycisNative
Astragalus lentiginosus var. piscinensisFISH SLOUGH MILKVETCHNative
Astragalus lentiginosus var. platyphyllidius
(Under Astragalus lentiginosus var. chartaceus)
Synonym
Astragalus lentiginosus var. salinusNative
Astragalus lentiginosus var. semotusNative
Astragalus lentiginosus var. sesquimetralisSODAVILLE MILKVETCHNative
Astragalus lentiginosus var. sierraeBIG BEAR VALLEY MILKVETCHNative
Astragalus lentiginosus var. variabilisNative
Astragalus leucolobusBIG BEAR VALLEY WOOLLYPODNative
Astragalus leucopsis
(Under Astragalus trichopodus var. lonchus)
Synonym
Astragalus leucopsis var. lonchus
(Under Astragalus trichopodus var. lonchus)
Synonym
Astragalus macrodonSALINAS MILKVETCHNative
Astragalus magdalenae var. peirsoniiPEIRSON'S MILKVETCHNative
Astragalus malacusNative
Astragalus miguelensisSAN MIGUEL ISLAND MILKVETCHNative
Astragalus minthorniae var. villosusNative
Astragalus mohavensis
  ↳  Key to Astragalus mohavensis
Native
Astragalus mohavensis var. hemigyrusCURVED-POD MILKVETCHNative
Astragalus mohavensis var. mohavensisNative
Astragalus monoensisMONO MILKVETCHNative
Astragalus monoensis var. ravenii
(Under Astragalus ravenii)
Synonym
Astragalus neviniiSAN CLEMENTE ISLAND MILKVETCHNative
Astragalus newberryi var. newberryiNEWBERRY'S MILKVETCHNative
Astragalus nutansPROVIDENCE MOUNTAINS MILKVETCHNative
Astragalus nuttallianus
  ↳  Key to Astragalus nuttallianus
SMALL-FLOWERED MILKVETCHNative
Astragalus nuttallianus var. austrinusPossibly in ca
Astragalus nuttallianus var. cedrosensisNative
Astragalus nuttallianus var. imperfectusNative
Astragalus nuttallii
  ↳  Key to Astragalus nuttallii
NUTTALL'S MILKVETCHNative
Astragalus nuttallii var. nuttalliiOCEAN BLUFF MILKVETCHNative
Astragalus nuttallii var. virgatusNative
Astragalus nyensisNYE MILKVETCHNative
Astragalus obscurusNative
Astragalus oocarpusSAN DIEGO MILKVETCHNative
Astragalus oophorous
(Under Astragalus oophorus)
Orthographic variant
Astragalus oophorous var. lavinii
(Under Astragalus oophorus var. lavinii)
Orthographic variant
Astragalus oophorous var. oophorous
(Under Astragalus oophorus var. oophorus)
Orthographic variant
Astragalus oophorus
  ↳  Key to Astragalus oophorus
Native
Astragalus oophorus var. laviniiLAVIN'S MILKVETCHNative
Astragalus oophorus var. oophorusEGG MILKVETCHNative
Astragalus oxyphysusSTANISLAUS MILKVETCHNative
Astragalus pachypus
  ↳  Key to Astragalus pachypus
Native
Astragalus pachypus var. jaegeriJAEGER'S BUSH MILKVETCHNative
Astragalus pachypus var. pachypusBUSH MILKVETCHNative
Astragalus palmeriNative
Astragalus panamintensisNative
Astragalus pauperculusDEPAUPERATE MILKVETCHNative
Astragalus platytropisBROAD-KEELED MILKVETCHNative
Astragalus pomonensisNative
Astragalus preussii
  ↳  Key to Astragalus preussii
Native
Astragalus preussii var. laxiflorusLANCASTER MILKVETCHNative
Astragalus preussii var. preussiiPREUSS' MILKVETCHNative
Astragalus pseudiodanthusTONOPAH MILKVETCHNative
Astragalus pulsiferae
  ↳  Key to Astragalus pulsiferae
Native
Astragalus pulsiferae var. coronensisMODOC PLATEAU MILKVETCHNative
Astragalus pulsiferae var. pulsiferaePULSIFER'S MILKVETCHNative
Astragalus pulsiferae var. suksdorfiiSUKSDORF'S MILKVETCHNative
Astragalus purshii
  ↳  Key to Astragalus purshii
PURSH'S MILKVETCHNative
Astragalus purshii var. funereus
(Under Astragalus funereus)
Synonym
Astragalus purshii var. lagopinusNative
Astragalus purshii var. lectulusNative
Astragalus purshii var. longilobus
(Under Astragalus purshii var. tinctus)
Synonym
Astragalus purshii var. purshiiNative
Astragalus purshii var. tinctusNative
Astragalus pycnostachyus
  ↳  Key to Astragalus pycnostachyus
Native
Astragalus pycnostachyus var. lanosissimusVENTURA MARSH MILKVETCHNative
Astragalus pycnostachyus var. pycnostachyusCOASTAL MARSH MILKVETCHNative
Astragalus rattanii
  ↳  Key to Astragalus rattanii
Native
Astragalus rattanii var. jepsonianusJEPSON'S MILKVETCHNative
Astragalus rattanii var. rattaniiRATTAN'S MILKVETCHNative
Astragalus raveniiRAVEN'S MILKVETCHNative
Astragalus sabulonumNative
Astragalus sepultipesBISHOP MILKVETCHNative
Astragalus serenoi var. shockleyiSHOCKLEY'S MILKVETCHNative
Astragalus shevockiiSHEVOCK'S MILKVETCHNative
Astragalus subvestitusKERN COUNTY MILKVETCHNative
Astragalus tegetarioides var. anxius
(Under Astragalus anxius)
Synonym
Astragalus tener
  ↳  Key to Astragalus tener
Native
Astragalus tener var. ferrisiaeFERRIS' MILKVETCHNative
Astragalus tener var. tenerALKALI MILKVETCHNative
Astragalus tener var. titiCOASTAL DUNES MILKVETCHNative
Astragalus tephrodes var. brachylobusPossibly in ca
Astragalus tidestromiiTIDESTROM'S MILKVETCHNative
Astragalus traskiaeTRASK'S MILKVETCHNative
Astragalus tricarinatusTRIPLE-RIBBED MILKVETCHNative
Astragalus trichopodus
  ↳  Key to Astragalus trichopodus
Native
Astragalus trichopodus var. lonchusNative
Astragalus trichopodus var. phoxusANTISELL MILKVETCHNative
Astragalus trichopodus var. trichopodusSANTA BARBARA MILKVETCHNative
Astragalus umbraticusBALD MOUNTAIN MILKVETCHNative
Astragalus vaseyi
(Under Astragalus palmeri)
Synonym
Astragalus webberiWEBBER'S MILKVETCHNative
Astragalus whitneyi
  ↳  Key to Astragalus whitneyi
BALLOON MILKVETCHNative
Astragalus whitneyi var. confususNative
Astragalus whitneyi var. lenophyllusWOOLLY-LEAVED MILKVETCHNative
Astragalus whitneyi var. siskiyouensisNative
Astragalus whitneyi var. whitneyiNative
Astragalus wootoni var. wootoni
(Under Astragalus allochrous var. playanus)
Synonym
Astrolepis
Astrolepis cochisensisSCALY CLOAK-FERNNative
AsyneumaHAREBELL
Asyneuma prenanthoidesNative
AthyriaceaeLADY FERN FAMILY
Athyrium
  ↳  Key to Athyrium
LADY FERN
Athyrium alpestre var. americanum
(Under Athyrium distentifolium var. americanum)
Illegitimate name
Athyrium distentifolium var. americanumNative
Athyrium filix-femina var. californicum
(Under Athyrium filix-femina var. cyclosorum)
Synonym
Athyrium filix-femina var. cyclosorumNative
Athyrium filix-femina var. sitchense
(Under Athyrium filix-femina var. cyclosorum)
Synonym
Athysanus
  ↳  Key to Athysanus
Athysanus pusillusNative
Athysanus unilateralisNative
Atocion
Atocion armeriaSWEET-WILLIAM CATCHFLYNaturalized
AtrichoserisGRAVEL-GHOST
Atrichoseris platyphyllaNative
Atriplex
  ↳  Key to Atriplex
SALTBUSH, ORACH
Atriplex amnicolaSWAMP SALTBUSHNaturalized
Atriplex argenteaSILVERSCALENative
Atriplex argentea subsp. expansa
(Under Atriplex argentea var. expansa)
Synonym
Atriplex argentea var. argenteaNative
Atriplex argentea var. expansaNative
Atriplex argentea var. hillmaniiHILLMAN'S SILVERSCALENative
Atriplex argentea var. longitrichomaPAHRUMP ORACHNative
Atriplex argentea var. mohavensis
(Under Atriplex argentea var. expansa)
Synonym
Atriplex bracteosa
(Under Atriplex serenana)
Illegitimate name
Atriplex californica
(Under Extriplex californica)
Synonym
Atriplex canescensFOUR-WING SALTBUSHNative
Atriplex canescens subsp. canescens
(Under Atriplex canescens var. canescens)
Synonym
Atriplex canescens subsp. linearis
(Under Atriplex canescens var. linearis)
Synonym
Atriplex canescens var. canescensNative
Atriplex canescens var. laciniataCALEB SALTBUSHNative
Atriplex canescens var. linearisSLENDERLEAF SALTBUSHNative
Atriplex canescens var. macilentaSALTON SALTBUSHNative
Atriplex confertifoliaSHADSCALENative
Atriplex cordulataHEARTSCALENative
Atriplex cordulata var. cordulataNative
Atriplex cordulata var. erecticaulisEARLIMART ORACHNative
Atriplex cordulata var. tularensis
(Under Atriplex tularensis)
Synonym
Atriplex coronataNative
Atriplex coronata var. coronataCROWNSCALENative
Atriplex coronata var. notatiorSAN JACINTO VALLEY CROWNSCALENative
Atriplex coronata var. vallicolaLOST HILLS CROWNSCALENative
Atriplex coronata var. verna
(Under Atriplex coronata var. coronata)
Synonym
Atriplex coulteriCOULTER'S SALTBUSHNative
Atriplex covillei
(Under Stutzia covillei)
Synonym
Atriplex curvidens
(Under Atriplex polycarpa)
Synonym
Atriplex davidsonii
(Under Atriplex serenana var. davidsonii)
Synonym
Atriplex decumbens
(Under Atriplex watsonii)
Synonym
Atriplex depressaBRITTLESCALENative
Atriplex dioicaTHICKLEAF ORACHNative
Atriplex elegansWHEELSCALENative
Atriplex elegans subsp. fasciculata
(Under Atriplex elegans var. fasciculata)
Synonym
Atriplex elegans var. elegansNative
Atriplex elegans var. fasciculataMECCA ORACHNative
Atriplex erecticaulis
(Under Atriplex cordulata var. erecticaulis)
Synonym
Atriplex expansa
(Under Atriplex argentea var. expansa)
Synonym
Atriplex falcata
(Under Atriplex gardneri var. falcata)
Synonym
Atriplex fasciculata
(Under Atriplex elegans var. fasciculata)
Synonym
Atriplex flagellaris
(Under Atriplex semibaccata)
Synonym
Atriplex flavidaCARRIZO PLAIN CROWNSCALENative
Atriplex fruticulosaBALLSCALE, LITTLE OAK ORACHNative
Atriplex gardneri var. falcataFALCATE SALTBUSHNative
Atriplex glaucaNaturalized
Atriplex gmelinii var. gmeliniiGMELIN'S SALTBUSHNative
Atriplex halimoides
(Under Atriplex lindleyi)
Illegitimate name
Atriplex hastata
(Under Atriplex prostrata)
Unabridged misapplied name
Atriplex hastata subsp. patula
(Under Atriplex patula)
Synonym
Atriplex hastata var. patula
(Under Atriplex patula)
Synonym
Atriplex heterosperma
(Under Atriplex micrantha)
Synonym
Atriplex hillmanii
(Under Atriplex argentea var. hillmanii)
Synonym
Atriplex hortensisGARDEN ORACHNaturalized
Atriplex hymenelytraDESERT-HOLLYNative
Atriplex joaquinana
(Under Extriplex joaquinana)
Synonym
Atriplex joaquiniana
(Under Extriplex joaquinana)
Orthographic variant
Atriplex johnstonii
(Under Atriplex nummularia)
Synonym
Atriplex lentiformisBIG SALTBUSHNative
Atriplex lentiformis subsp. torreyi
(Under Atriplex torreyi var. torreyi)
Synonym
Atriplex lentiformis var. torreyi
(Under Atriplex torreyi var. torreyi)
Synonym
Atriplex leucophyllaBEACH SALTBUSHNative
Atriplex lindleyiNaturalized
Atriplex linearis
(Under Atriplex canescens var. linearis)
Synonym
Atriplex longitrichoma
(Under Atriplex argentea var. longitrichoma)
Synonym
Atriplex micranthaRUSSIAN ATRIPLEXNaturalized
Atriplex minusculaLESSER SALTSCALENative
Atriplex nitens
(Under Atriplex hortensis)
Synonym
Atriplex nummulariaNaturalized
Atriplex nuttallii
(Under Atriplex canescens)
Synonym
Atriplex nuttallii var. falcata
(Under Atriplex gardneri var. falcata)
Synonym
Atriplex pacificaSOUTH COAST SALTSCALENative
Atriplex parishiiPARISH'S BRITTLESCALENative
Atriplex parishii var. depressa
(Under Atriplex depressa)
Synonym
Atriplex parishii var. minuscula
(Under Atriplex minuscula)
Synonym
Atriplex parishii var. persistens
(Under Atriplex persistens)
Synonym
Atriplex parishii var. subtilis
(Under Atriplex subtilis)
Synonym
Atriplex parryiNative
Atriplex patulaSPEAR ORACHNative
Atriplex patula subsp. hastata
(Under Atriplex prostrata)
Unabridged misapplied name
Atriplex patula subsp. spicata
(Under Extriplex joaquinana)
Synonym
Atriplex patula var. obtusa
(Under Atriplex gmelinii var. gmelinii)
Synonym
Atriplex patula var. subspicata
(Under Atriplex dioica)
Synonym
Atriplex persistensVERNAL POOL SMALLSCALENative
Atriplex phyllostegia
(Under Stutzia covillei)
Synonym, in part
Atriplex polycarpaALLSCALE SALTBUSHNative
Atriplex prostrataFAT-HENNaturalized
Atriplex pusillaSMOOTH SALTBUSHNative
Atriplex ramosissima
(Under Atriplex pacifica)
Synonym
Atriplex roseaTUMBLING ORACHNaturalized
Atriplex saltonensis
(Under Atriplex elegans var. fasciculata)
Synonym
Atriplex semibaccataAUSTRALIAN SALTBUSHNaturalized
Atriplex serenanaBRACTSCALE, STINKING ORACHNative
Atriplex serenana var. davidsoniiDAVIDSON'S SALTSCALENative
Atriplex serenana var. serenanaNative
Atriplex spicata
(Under Extriplex joaquinana)
Illegitimate name
Atriplex spicata var. lagunita
(Under Extriplex joaquinana)
Synonym
Atriplex spiniferaSPINY SALTBUSHNative
Atriplex subdecumbens
(Under Atriplex truncata)
Synonym
Atriplex suberectaSPRAWLING SALTBUSHNaturalized
Atriplex subspicata
(Under Atriplex dioica)
Synonym
Atriplex subtilisSUBTLE ORACHNative
Atriplex torreyi var. torreyiTORREY'S SALTBUSHNative
Atriplex triangularis
(Under Atriplex prostrata)
Synonym
Atriplex trinervata
(Under Atriplex argentea var. expansa)
Synonym
Atriplex truncataWEDGESCALENative
Atriplex truncata var. stricta
(Under Atriplex truncata)
Synonym
Atriplex tularensisBAKERSFIELD SMALLSCALENative
Atriplex vallicola
(Under Atriplex coronata var. vallicola)
Synonym
Atriplex verna
(Under Atriplex coronata var. coronata)
Synonym
Atriplex watsoniiNative
Aubrieta
Aubrieta deltoideaWaif
Avena
  ↳  Key to Avena
OATS
Avena barbataSLENDER WILD OATNaturalized
Avena fatuaWILD OATNaturalized
Avena fatua var. sativa
(Under Avena sativa)
Synonym
Avena sativaCULTIVATED OATNaturalized
Avena sterilisANIMATED OATNaturalized
Avicennia
Avicennia marina var. australasicaGRAY MANGROVENaturalized
Avicennia marina var. resinifera
(Under Avicennia marina var. australasica)
Synonym
Ayenia
Ayenia californica
(Under Ayenia compacta)
Synonym
Ayenia compactaCALIFORNIA AYENIANative
Azolla
  ↳  Key to Azolla
Azolla filiculoidesNative
Azolla mexicana
(Under Azolla microphylla)
Synonym
Azolla microphyllaMEXICAN MOSQUITO FERNNative
AzollaceaeMOSQUITO FERN FAMILY
Baccharis
  ↳  Key to Baccharis
Baccharis brachyphyllaNative
Baccharis douglasii
(Under Baccharis glutinosa)
Synonym
Baccharis emoryi
(Under Baccharis salicina)
Synonym
Baccharis glutinosaMARSH BACCHARISNative
Baccharis glutinosa
(Under Baccharis salicifolia subsp. salicifolia)
Misapplied name
Baccharis malibuensisMALIBU BACCHARISNative
Baccharis pilularisCOYOTE BRUSHNative
Baccharis pilularis subsp. consanguineaNative
Baccharis pilularis subsp. pilularisNative
Baccharis pilularis var. consanguinea
(Under Baccharis pilularis subsp. consanguinea)
Synonym
Baccharis plummeraeNative
Baccharis plummerae subsp. glabrataSAN SIMEON BACCHARISNative
Baccharis plummerae subsp. plummeraePLUMMER'S BACCHARISNative
Baccharis salicifolia subsp. salicifoliaMULE FATNative
Baccharis salicinaNative
Baccharis sarothroidesBROOM BACCHARISNative
Baccharis sarothroides var. pluricephala
(Under Lepidospartum squamatum)
Synonym
Baccharis sergiloidesDESERT BACCHARISNative
Baccharis vanessaeENCINITAS BACCHARISNative
Bacopa
  ↳  Key to Bacopa
WATER-HYSSOP
Bacopa eiseniiNative
Bacopa monnieriNaturalized
Bacopa nobsiana
(Under Bacopa rotundifolia)
Synonym
Bacopa repensAgricultural weed
Bacopa rotundifoliaNaturalized
Baeothryon pumilum
(Under Trichophorum pumilum)
Synonym
Bahia dissecta
(Under Hymenothrix dissecta)
Synonym
Bahia neomexicana
(Under Picradeniopsis multiflora)
Synonym
Bahiopsis
  ↳  Key to Bahiopsis
Bahiopsis laciniataSAN DIEGO VIGUIERANative
Bahiopsis parishiiPARISH'S GOLDENEYENative
Bahiopsis reticulataDEATH VALLEY GOLDENEYENative
Baileya
  ↳  Key to Baileya
DESERT-MARIGOLD
Baileya multiradiataNative
Baileya multiradiata var. multiradiata
(Under Baileya multiradiata)
Synonym
Baileya pauciradiataNative
Baileya pleniradiataNative
BalsaminaceaeTOUCH-ME-NOT or BALSAM FAMILY
Balsamorhiza
  ↳  Key to Balsamorhiza
BALSAMROOT
Balsamorhiza deltoideaNative
Balsamorhiza hirsutaNative
Balsamorhiza hookeriNative
Balsamorhiza hookeri var. lanata
(Under Balsamorhiza lanata)
Synonym
Balsamorhiza hookeri var. neglecta
(Under Balsamorhiza hirsuta)
Synonym
Balsamorhiza lanataWOOLLY BALSAMROOTNative
Balsamorhiza macrolepisNative
Balsamorhiza macrolepis var. macrolepis
(Under Balsamorhiza macrolepis)
Synonym
Balsamorhiza macrolepis var. platylepis
(Under Balsamorhiza hookeri)
Synonym
Balsamorhiza sagittataNative
Balsamorhiza sericeaSILKY BALSAMROOTNative
Balsamorhiza serrataSERRATED BALSAMROOTNative
Barbarea
  ↳  Key to Barbarea
WINTER CRESS, ROCKET
Barbarea orthocerasNative
Barbarea orthoceras var. dolichocarpa
(Under Barbarea orthoceras)
Synonym
Barbarea vernaEARLY WINTER CRESSNaturalized
Barbarea vulgarisYELLOW ROCKETNaturalized
BasellaceaeBASELLA FAMILY
Bassia
  ↳  Key to Bassia
Bassia hyssopifoliaNaturalized
Bassia scopariaNaturalized
Bassia scoparia subsp. culta
(Under Bassia scoparia)
Synonym
Bassia scoparia var. culta
(Under Bassia scoparia)
Synonym
BataceaeSALTWORT FAMILY
Batis
Batis maritimaSALTWORT, BEACHWORTNative
Batis vermiculata
(Under Sarcobatus vermiculatus)
Synonym
BebbiaSWEETBUSH
Bebbia juncea var. asperaNative
Beckamannia syzigachne subsp. baicalensis
(Under Beckmannia syzigachne)
Synonym
Beckmannia
Beckmannia syzigachneAMERICAN SLOUGH GRASSNative
Beckwithia andersonii
(Under Ranunculus andersonii)
Synonym
Bellardia
  ↳  Key to Bellardia
Bellardia trixago var. trixagoMEDITERRANEAN LINESEEDNaturalized
Bellardia viscosaYELLOW GLANDWEEDNaturalized
Bellis
Bellis perennisENGLISH DAISYNaturalized
Beloperone californica
(Under Justicia californica)
Synonym
Benitoa
Benitoa occidentalisNative
Bensonia oregona
(Under Bensoniella oregona)
Synonym
Bensoniella
Bensoniella oregonaBENSONIELLANative
Berberidaceae
  ↳  Key to Berberidaceae
BARBERRY FAMILY
Berberis
  ↳  Key to Berberis
OREGON-GRAPE, BARBERRY
Berberis amplectens
(Under Berberis aquifolium var. repens)
Synonym
Berberis aquifoliumNative
Berberis aquifolium var. aquifoliumNative
Berberis aquifolium var. dictyotaNative
Berberis aquifolium var. repensNative
Berberis californica
(Under Berberis aquifolium var. dictyota)
Synonym
Berberis darwiniiNaturalized
Berberis dictyota
(Under Berberis aquifolium var. dictyota)
Synonym
Berberis fremontiiNative
Berberis haematocarpaNative
Berberis harrisonianaKOFA MOUNTAIN BARBERRYNative
Berberis higginsiaeNative
Berberis nervosaNative
Berberis neviniiNEVIN'S BARBERRYNative
Berberis pinnataNative
Berberis pinnata subsp. insularisISLAND BARBERRYNative
Berberis pinnata subsp. pinnataNative
Berberis piperiana
(Under Berberis aquifolium var. aquifolium)
Synonym
Berberis pumila
(Under Berberis aquifolium var. repens)
Synonym
Berberis repens
(Under Berberis aquifolium var. repens)
Synonym
Berberis sonnei
(Under Berberis aquifolium var. repens)
Synonym
Berberis vulgarisNaturalized
Bergerocactus
Bergerocactus emoryiGOLDEN-SPINED CEREUSNative
BergiaWATERFIRE
Bergia texanaNative
Bernardia
Bernardia incanaNative
Berteroa
Berteroa incanaNaturalized
BerulaCUTLEAF WATER-PARSNIP
Berula erectaNative
BetaBEET
Beta vulgaris subsp. maritimaSEA BEETNaturalized
Betula
  ↳  Key to Betula
BIRCH
Betula glandulosaDWARF RESIN BIRCHNative
Betula occidentalisWATER BIRCHNative
Betula viridis
(Under Alnus viridis)
Synonym
Betulaceae
  ↳  Key to Betulaceae
BIRCH FAMILY
Bidens
  ↳  Key to Bidens
Bidens cernuaNODDING BUR-MARIGOLDNative
Bidens cernua var. cernua
(Under Bidens cernua)
Synonym
Bidens connata var. petiolata
(Under Bidens tripartita)
Synonym
Bidens frondosaSTICKTIGHTNative
Bidens laevisBUR-MARIGOLDNative
Bidens pilosaCOMMON BEGGAR-TICKSNaturalized
Bidens pilosa var. pilosa
(Under Bidens pilosa)
Synonym
Bidens tripartitaNaturalized
Bidens vulgataNaturalized
Bigelowia greenei
(Under Chrysothamnus greenei)
Synonym
Bignoniaceae
  ↳  Key to Bignoniaceae
TRUMPET-CREEPER FAMILY
Bilderdykia aubertii
(Under Fallopia baldschuanica)
Synonym
Bilderdykia baldschuanica
(Under Fallopia baldschuanica)
Synonym
Bilderdykia convolvulus
(Under Fallopia convolvulus)
Synonym
Billardiera
Billardiera heterophyllaAUSTRALIAN BLUEBELLNaturalized
Biolettia riparia
(Under Trichocoronis wrightii var. wrightii)
Synonym
Bistorta
Bistorta bistortoidesWESTERN BISTORTNative
Bituminaria
Bituminaria bituminosaARABIAN PEANaturalized
Blechnaceae
  ↳  Key to Blechnaceae
DEER FERN FAMILY
Blechnum spicant
(Under Struthiopteris spicant)
Synonym
Blennosperma
  ↳  Key to Blennosperma
Blennosperma bakeriSONOMA SUNSHINENative
Blennosperma nanumNative
Blennosperma nanum var. nanumNative
Blennosperma nanum var. robustumPOINT REYES BLENNOSPERMANative
BlepharidachneEYELASH GRASS, DESERT GRASS
Blepharidachne kingiiKING'S EYELASH GRASSNative
BlepharipappusEYELASH TARWEED
Blepharipappus scaberNative
Blepharipappus scaber subsp. laevis
(Under Blepharipappus scaber)
Synonym
Blepharizonia
  ↳  Key to Blepharizonia
BIG TARWEED
Blepharizonia laxaNative
Blepharizonia plumosaBIG TARPLANTNative
Blepharizonia plumosa subsp. plumosa
(Under Blepharizonia plumosa)
Synonym
Blepharizonia plumosa subsp. viscida
(Under Blepharizonia laxa)
Synonym
Bloomeria
  ↳  Key to Bloomeria
GOLDENSTAR
Bloomeria aurea
(Under Bloomeria crocea var. aurea)
Synonym
Bloomeria clevelandiiSAN DIEGO GOLDENSTARNative
Bloomeria croceaCOMMON GOLDENSTARNative
Bloomeria crocea var. aureaNative
Bloomeria crocea var. croceaNative
Bloomeria crocea var. montanaMOUNTAIN GOLDENSTARNative
Bloomeria gracilis
(Under Bloomeria crocea var. crocea)
Synonym
Bloomeria humilisDWARF GOLDENSTARNative
Bloomeria maritima
(Under Muilla maritima)
Synonym
Bloomeria maritima var. serotina
(Under Muilla maritima)
Synonym
Bloomeria montana
(Under Bloomeria crocea var. montana)
Synonym
Bloomeria transmontana
(Under Muilla transmontana)
Synonym
Boechera
  ↳  Key to Boechera
ROCKCRESS
Boechera acutinaPOINTED ROCKCRESSNative
Boechera arcuataARCHING ROCKCRESSNative
Boechera bodiensisBODIE HILLS ROCKCRESSNative
Boechera breweriNative
Boechera breweri subsp. breweriBREWER'S ROCKCRESSNative
Boechera breweri subsp. shastaensisSHASTA ROCKCRESSNative
Boechera calderiCALDER'S ROCKCRESSNative
Boechera californicaCALIFORNIA ROCKCRESSNative
Boechera cobrensisMASONIC ROCKCRESSNative
Boechera constanceiCONSTANCE'S ROCKCRESSNative
Boechera covilleiCOVILLE'S ROCKCRESSNative
Boechera davidsoniiDAVIDSON'S ROCKCRESSNative
Boechera demissa var. pendulina
(Under Boechera pendulina)
Synonym
Boechera depauperataSOLDIER ROCKCRESSNative
Boechera disparPINYON ROCKCRESSNative
Boechera divaricarpaSPREADINGPOD ROCKCRESSNative
Boechera elkoensisELKO ROCKCRESSNative
Boechera evadensHIDDEN ROCKCRESSNative
Boechera glaucovalvulaBLUEPOD ROCKCRESSNative
Boechera hirshbergiae
(Under Boechera johnstonii)
Synonym
Boechera hoffmanniiHOFFMANN'S ROCKCRESSNative
Boechera holboellii var. pendulocarpa
(Under Boechera pendulocarpa)
Synonym
Boechera howelliiHOWELL'S ROCKCRESSNative
Boechera inyoensisINYO ROCKCRESSNative
Boechera johnstoniiJOHNSTON'S ROCKCRESSNative
Boechera koehleriKOEHLER'S ROCKCRESSNative
Boechera lemmoniiLEMMON'S ROCKCRESSNative
Boechera lincolnensisLINCOLN ROCKCRESSNative
Boechera lyalliiLYALL'S ROCKCRESSNative
Boechera parishiiPARISH'S ROCKCRESSNative
Boechera paucifloraHAIRY STEM ROCKCRESSNative
Boechera pauperculaSMALL-FLOWERED ROCKCRESSNative
Boechera peirsoniiPEIRSON'S ROCKCRESSNative
Boechera pendulinaRABBIT-EAR ROCKCRESSNative
Boechera pendulocarpaDROPSEED ROCKCRESSNative
Boechera perennansPERENNIAL ROCKCRESSNative
Boechera pinetorumWOODLAND ROCKCRESSNative
Boechera pinzliaePINZL'S ROCKCRESSNative
Boechera platyspermaPIONEER ROCKCRESSNative
Boechera pratincolaMEADOW ROCKCRESSNative
Boechera puberulaSILVER ROCKCRESSNative
Boechera pulchraBEAUTIFUL ROCKCRESSNative
Boechera pygmaeaTULARE COUNTY ROCKCRESSNative
Boechera rectissimaBRISTLY LEAF ROCKCRESSNative
Boechera repandaYOSEMITE ROCKCRESSNative
Boechera repanda var. greenei
(Under Boechera repanda)
Synonym
Boechera retrofractaREFLEXED ROCKCRESSNative
Boechera rigidissimaTRINITY MOUNTAIN ROCKCRESSNative
Boechera rolleiROLLE'S ROCKCRESSNative
Boechera rubicundulaMOUNT DAY ROCKCRESSNative
Boechera selbyi var. inyoensis
(Under Boechera inyoensis)
Synonym
Boechera serpenticolaSERPENTINE ROCKCRESSNative
Boechera shevockiiSHEVOCK'S ROCKCRESSNative
Boechera shockleyiSHOCKLEY'S ROCKCRESSNative
Boechera sparsifloraSICKLEPOD ROCKCRESSNative
Boechera strictaDRUMMOND'S ROCKCRESSNative
Boechera subpinnatifidaKLAMATH ROCKCRESSNative
Boechera suffrutescensWOODY ROCKCRESSNative
Boechera tiehmiiTIEHM'S ROCKCRESSNative
Boechera tularensisTULARE ROCKCRESSNative
Boechera ultra-alsa
(Under Boechera ultraalsa)
Orthographic variant
Boechera ultraalsaSNOW MOUNTAIN ROCKCRESSNative
Boechera xylopodaBIGFOOT HYBRID ROCKCRESSNative
Boechera yorkiiLAST CHANCE ROCKCRESSNative
BoehmeriaFALSE NETTLE
Boehmeria cylindricaNaturalized
Boehmeria nivea
(Under Boehmeria cylindrica)
Misapplied name
Boerhavia
  ↳  Key to Boerhavia
SPIDERLING
Boerhavia annulatus
(Under Anulocaulis annulatus)
Synonym
Boerhavia coccineaSCARLET SPIDERLINGNative
Boerhavia coulteriNative
Boerhavia coulteri var. coulteriNative
Boerhavia coulteri var. palmeriNative
Boerhavia diffusaNaturalized
Boerhavia intermedia
(Under Boerhavia triquetra var. intermedia)
Synonym
Boerhavia triquetra var. intermediaNative
Boerhavia wrightiiNative
Boisduvalia cleistogama
(Under Epilobium cleistogamum)
Synonym
Boisduvalia densiflora
(Under Epilobium densiflorum)
Synonym
Boisduvalia densiflora var. pallescens
(Under Epilobium densiflorum)
Synonym
Boisduvalia densiflora var. salicina
(Under Epilobium densiflorum)
Synonym
Boisduvalia glabella
(Under Epilobium campestre)
Synonym
Boisduvalia glabella var. campestris
(Under Epilobium campestre)
Synonym
Boisduvalia macrantha
(Under Epilobium pallidum)
Synonym
Boisduvalia pallida
(Under Epilobium pallidum)
Synonym
Boisduvalia stricta
(Under Epilobium torreyi)
Synonym
Boisduvalia torreyi
(Under Epilobium torreyi)
Synonym
Bolandra
Bolandra californicaSIERRA BOLANDRANative
Bolboschoenus
  ↳  Key to Bolboschoenus
TUBEROUS BULRUSHES
Bolboschoenus fluviatilisRIVER BULRUSHNative
Bolboschoenus glaucusNaturalized
Bolboschoenus maritimus subsp. paludosusSALTMARSH BULRUSH, ALKALI BULRUSHNative
Bolboschoenus robustusSEACOAST BULRUSHNative
Boraginaceae
  ↳  Key to Boraginaceae
BORAGE FAMILY
BoragoBORAGE
Borago officinalisNaturalized
Boschniakia hookeri
(Under Kopsiopsis hookeri)
Synonym
Boschniakia strobilacea
(Under Kopsiopsis strobilacea)
Synonym
Bothriochloa
  ↳  Key to Bothriochloa
Bothriochloa barbinodisCANE BLUESTEMNative
Bothriochloa ischaemumKING RANCH BLUESTEMWaif
Bothriochloa ischaemum var. songarica
(Under Bothriochloa ischaemum)
Synonym
Bothriochloa laguroides subsp. torreyanaSILVER BLUESTEMNaturalized
Botrychium
  ↳  Key to Botrychium
MOONWORT
Botrychium ascendensUPSWEPT MOONWORTNative
Botrychium boreale subsp. obtusilobum
(Under Botrychium pinnatum)
Synonym
Botrychium californicum
(Under Sceptridium multifidum)
Synonym
Botrychium coulteri
(Under Sceptridium multifidum)
Synonym
Botrychium crenulatumSCALLOPED MOONWORTNative
Botrychium lineareSLENDER MOONWORTNative
Botrychium lunariaCOMMON MOONWORTNative
Botrychium lunaria var. minganense
(Under Botrychium minganense)
Synonym
Botrychium minganenseMINGAN MOONWORTNative
Botrychium montanumWESTERN GOBLINNative
Botrychium multifidum
(Under Sceptridium multifidum)
Synonym
Botrychium multifidum subsp. californicum
(Under Sceptridium multifidum)
Synonym
Botrychium multifidum subsp. coulteri
(Under Sceptridium multifidum)
Synonym
Botrychium multifidum subsp. silaifolium
(Under Sceptridium multifidum)
Synonym
Botrychium onondagense
(Under Botrychium lunaria)
Synonym
Botrychium paradoxumPARADOX MOONWORTNative
Botrychium pinnatumNORTHWESTERN MOONWORTNative
Botrychium pumicolaPUMICE MOONWORTNative
Botrychium silaifolium
(Under Sceptridium multifidum)
Synonym
Botrychium simplexNative
Botrychium simplex var. compositumYOSEMITE MOONWORTNative
Botrychium simplex var. simplexLEAST MOONWORTNative
Botrychium tunuxMOOSEWORTNative
Botrychium virginianum
(Under Botrypus virginianus)
Synonym
Botrychium yaaxudakeitGIANT MOONWORTNative
BotrypusRATTLESNAKE FERN
Botrypus virginianusNative
Boussingaultia cordifolia
(Under Anredera cordifolia)
Synonym
Boussingaultia gracilis
(Under Anredera cordifolia)
Synonym
Boussingaultia gracilis var. pseudobaselloides
(Under Anredera cordifolia)
Synonym
Bouteloua
  ↳  Key to Bouteloua
GRAMA
Bouteloua aristidoides var. aristidoidesNEEDLE GRAMANative
Bouteloua barbata var. barbataSIXWEEKS GRAMANative
Bouteloua curtipendulaSIDE-OATS GRAMANative
Bouteloua eriopodaBLACK GRAMANative
Bouteloua gracilisBLUE GRAMANative
Bouteloua trifidaTHREE-AWNED GRAMANative
Bowlesia
Bowlesia incanaNative
Boykinia
  ↳  Key to Boykinia
Boykinia elata
(Under Boykinia occidentalis)
Synonym
Boykinia majorNative
Boykinia occidentalisNative
Boykinia rotundifoliaNative
Brachypodium
  ↳  Key to Brachypodium
FALSE BROME
Brachypodium distachyonNaturalized
Brachypodium pinnatumWaif
Brachypodium sylvaticumNaturalized
BrandegeaDESERT STAR-VINE
Brandegea bigeloviiNative
BraseniaWATERSHIELD
Brasenia peltata
(Under Brasenia schreberi)
Synonym
Brasenia purpurea
(Under Brasenia schreberi)
Synonym
Brasenia schreberiNative
Brassica
  ↳  Key to Brassica
MUSTARD
Brassica alba
(Under Sinapis alba)
Synonym
Brassica campestris
(Under Brassica rapa)
Synonym
Brassica fruticulosaNaturalized
Brassica geniculata
(Under Hirschfeldia incana)
Synonym
Brassica hirta
(Under Sinapis alba)
Synonym
Brassica junceaINDIA MUSTARDNaturalized
Brassica kaber
(Under Sinapis arvensis)
Synonym
Brassica napusSWEDE RAPE, RAPESEEDNaturalized
Brassica nigraBLACK MUSTARDNaturalized
Brassica oleraceaCABBAGENaturalized
Brassica rapaTURNIP, FIELD MUSTARDNaturalized
Brassica tournefortiiSAHARA MUSTARDNaturalized
Brassicaceae (Cruciferae)
  ↳  Key to Brassicaceae (Cruciferae)
MUSTARD FAMILY
Brayulinea densa
(Under Guilleminea densa var. aggregata)
Synonym
Brevoortia coccinea
(Under Dichelostemma ida-maia)
Synonym
Brevoortia ida-maia
(Under Dichelostemma ida-maia)
Synonym
Brickellia
  ↳  Key to Brickellia
BRICKELLBUSH
Brickellia arguta
(Under Brickellia atractyloides var. arguta)
Synonym
Brickellia arguta var. arguta
(Under Brickellia atractyloides var. arguta)
Synonym
Brickellia arguta var. odontolepis
(Under Brickellia atractyloides var. odontolepis)
Synonym
Brickellia atractyloidesNative
Brickellia atractyloides var. argutaPUNGENT BRICKELLBUSHNative
Brickellia atractyloides var. atractyloidesSPEARLEAF BRICKELLBUSHNative
Brickellia atractyloides var. odontolepisNative
Brickellia californicaCALIFORNIA BRICKELLBUSHNative
Brickellia californica var. desertorum
(Under Brickellia desertorum)
Synonym
Brickellia californica var. tenera
(Under Brickellia californica)
Synonym
Brickellia desertorumNative
Brickellia frutescensNative
Brickellia grandifloraNative
Brickellia grayana
(Under Brickellia microphylla var. microphylla)
Synonym
Brickellia greeneiNative
Brickellia incanaNative
Brickellia knappianaNative
Brickellia linifolia
(Under Brickellia oblongifolia var. linifolia)
Synonym
Brickellia longifoliaNative
Brickellia longifolia var. longifoliaNative
Brickellia longifolia var. multifloraNative
Brickellia microphyllaNative
Brickellia microphylla subsp. scabra
(Under Brickellia microphylla var. scabra)
Synonym
Brickellia microphylla var. microphyllaNative
Brickellia microphylla var. scabraNative
Brickellia microphylla var. watsonii
(Under Brickellia microphylla var. microphylla)
Synonym
Brickellia multiflora
(Under Brickellia longifolia var. multiflora)
Synonym
Brickellia neviniiNative
Brickellia oblongifolia subsp. linifolia
(Under Brickellia oblongifolia var. linifolia)
Synonym
Brickellia oblongifolia var. linifoliaNative
Brickellia scabra
(Under Brickellia microphylla var. scabra)
Synonym
Brickellia tenera
(Under Brickellia californica)
Synonym
Brickellia watsonii
(Under Brickellia microphylla var. microphylla)
Synonym
Brickellia wrightii var. tenera
(Under Brickellia californica)
Synonym
Briza
  ↳  Key to Briza
QUAKING GRASS
Briza maximaRATTLESNAKE GRASS, LARGE QUAKING GRASSNaturalized
Briza minorANNUAL QUAKING GRASS, SMALL QUAKING GRASSNaturalized
Brodiaea
  ↳  Key to Brodiaea
Brodiaea appendiculataNative
Brodiaea bicolor
(Under Triteleia grandiflora)
Synonym
Brodiaea bridgesii
(Under Triteleia bridgesii)
Synonym
Brodiaea californicaCALIFORNIA BRODIAEANative
Brodiaea californica subsp. leptandra
(Under Brodiaea leptandra)
Synonym
Brodiaea californica var. leptandra
(Under Brodiaea leptandra)
Synonym
Brodiaea candida
(Under Triteleia laxa)
Synonym
Brodiaea capitata var. insularis
(Under Dipterostemon capitatus subsp. capitatus)
Synonym
Brodiaea capitata var. pauciflora
(Under Dipterostemon capitatus subsp. pauciflorus)
Synonym
Brodiaea clementina
(Under Triteleia clementina)
Synonym
Brodiaea coccinea
(Under Dichelostemma ida-maia)
Synonym
Brodiaea congesta
(Under Dichelostemma congestum)
Synonym
Brodiaea coronariaGARLAND BRODIAEANative
Brodiaea coronaria subsp. coronaria
(Under Brodiaea coronaria)
Synonym
Brodiaea coronaria subsp. rosea
(Under Brodiaea rosea subsp. rosea)
Synonym
Brodiaea coronaria var. kernensis
(Under Brodiaea terrestris subsp. kernensis)
Synonym
Brodiaea coronaria var. macropoda
(Under Brodiaea terrestris subsp. terrestris)
Synonym
Brodiaea coronaria var. mundula
(Under Brodiaea elegans subsp. elegans)
Synonym
Brodiaea coronaria var. rosea
(Under Brodiaea rosea subsp. rosea)
Synonym
Brodiaea crocea
(Under Triteleia crocea)
Synonym
Brodiaea crocea var. modesta
(Under Triteleia crocea)
Synonym
Brodiaea dissimulata
(Under Triteleia hyacinthina)
Synonym
Brodiaea douglasii var. howellii
(Under Triteleia grandiflora)
Synonym
Brodiaea dudleyi
(Under Triteleia dudleyi)
Synonym
Brodiaea elegans subsp. elegansHARVEST BRODIAEANative
Brodiaea elegans var. australis
(Under Brodiaea terrestris subsp. kernensis)
Synonym
Brodiaea elegans var. mundula
(Under Brodiaea elegans subsp. elegans)
Synonym
Brodiaea filifoliaTHREAD-LEAVED BRODIAEANative
Brodiaea filifolia var. orcuttii
(Under Brodiaea orcuttii)
Synonym
Brodiaea gracilis
(Under Triteleia montana)
Synonym
Brodiaea grandiflora
(Under Triteleia grandiflora)
Illegitimate name
Brodiaea grandiflora var. brachypoda
(Under Dichelostemma multiflorum)
Synonym
Brodiaea grandiflora var. elatior
(Under Brodiaea californica)
Synonym
Brodiaea grandiflora var. macropoda
(Under Brodiaea terrestris subsp. terrestris)
Synonym
Brodiaea grandiflora var. minor
(Under Brodiaea minor)
Synonym
Brodiaea hendersonii
(Under Triteleia hendersonii)
Synonym
Brodiaea howellii
(Under Triteleia grandiflora)
Synonym
Brodiaea hyacinthina
(Under Triteleia hyacinthina)
Synonym
Brodiaea hyacinthina var. greenei
(Under Triteleia lilacina)
Synonym
Brodiaea hyacinthina var. lactea
(Under Triteleia hyacinthina)
Synonym
Brodiaea hyacinthina var. lilacina
(Under Triteleia hyacinthina)
Synonym
Brodiaea ida-maia
(Under Dichelostemma ida-maia)
Synonym
Brodiaea insignisKAWEAH BRODIAEANative
Brodiaea insularis
(Under Dipterostemon capitatus subsp. capitatus)
Synonym
Brodiaea ixioides var. lugens
(Under Triteleia lugens)
Synonym
Brodiaea ixioides var. scabra
(Under Triteleia ixioides subsp. scabra)
Synonym
Brodiaea jolonensisMESA BRODIAEA, CHAPARRAL CLUSTER-LILYNative
Brodiaea kinkiensisSAN CLEMENTE ISLAND BRODIAEANative
Brodiaea lactea
(Under Triteleia hyacinthina)
Synonym
Brodiaea lactea var. lilacina
(Under Triteleia hyacinthina)
Synonym
Brodiaea laxa
(Under Triteleia laxa)
Synonym
Brodiaea laxa var. candida
(Under Triteleia laxa)
Synonym
Brodiaea laxa var. tracyi
(Under Triteleia laxa)
Synonym
Brodiaea leachiae
(Under Triteleia hendersonii)
Synonym
Brodiaea leptandraNARROW-FLOWERED CALIFORNIA BRODIAEANative
Brodiaea lilacina
(Under Triteleia lilacina)
Synonym
Brodiaea lugens
(Under Triteleia lugens)
Synonym
Brodiaea lutea
(Under Triteleia ixioides subsp. ixioides)
Synonym
Brodiaea lutea var. anilina
(Under Triteleia ixioides subsp. anilina)
Synonym
Brodiaea lutea var. cookii
(Under Triteleia ixioides subsp. cookii)
Synonym
Brodiaea lutea var. lugens
(Under Triteleia lugens)
Synonym
Brodiaea lutea var. scabra
(Under Triteleia ixioides subsp. scabra)
Synonym
Brodiaea matsoniiSULPHUR CREEK BRODIAEANative
Brodiaea minorSMALL BRODIAEANative
Brodiaea minor var. nana
(Under Brodiaea nana)
Synonym
Brodiaea modesta
(Under Triteleia crocea)
Synonym
Brodiaea multiflora
(Under Dichelostemma multiflorum)
Synonym
Brodiaea nanaDWARF BRODIAEANative
Brodiaea orcuttiiORCUTT'S BRODIAEANative
Brodiaea pallidaCHINESE CAMP BRODIAEANative
Brodiaea parviflora
(Under Dichelostemma multiflorum)
Synonym
Brodiaea peduncularis
(Under Triteleia peduncularis)
Synonym
Brodiaea pulchella
(Under Dipterostemon capitatus)
Synonym
Brodiaea pulchella var. pauciflora
(Under Dipterostemon capitatus subsp. pauciflorus)
Synonym
Brodiaea purdyi
(Under Brodiaea minor)
Synonym
Brodiaea roseaNative
Brodiaea rosea subsp. roseaINDIAN VALLEY BRODIAEANative
Brodiaea rosea subsp. vallicolaVALLEY BRODIAEANative
Brodiaea santarosaeSANTA ROSA BASALT BRODIAEANative
Brodiaea scabra
(Under Triteleia ixioides subsp. scabra)
Synonym
Brodiaea scabra var. anilina
(Under Triteleia ixioides subsp. anilina)
Synonym
Brodiaea sierraeSIERRA FOOTHILLS BRODIAEANative
Brodiaea stellarisSTAR BRODIAEANative
Brodiaea synandra var. insignis
(Under Brodiaea insignis)
Synonym
Brodiaea terrestrisNative
Brodiaea terrestris subsp. kernensisNative
Brodiaea terrestris subsp. terrestrisNative
Brodiaea torreyi
(Under Brodiaea terrestris subsp. terrestris)
Synonym
Brodiaea uniflora
(Under Ipheion uniflorum)
Synonym
Brodiaea volubilis
(Under Dichelostemma volubile)
Synonym
Bromidium tandilense
(Under Agrostis tandilensis)
Synonym
Bromus
  ↳  Key to Bromus
BROME, CHESS
Bromus alopecuros
(Under Bromus caroli-henrici)
Misapplied name
Bromus anomalus
(Under Bromus porteri)
Misapplied name
Bromus arenariusAUSTRALIAN CHESSNaturalized
Bromus arizonicusARIZONA BROMENative
Bromus arvensisFIELD BROMEWaif
Bromus berteroanusCHILEAN CHESSNaturalized
Bromus breviaristatus
(Under Bromus sitchensis var. marginatus)
Synonym
Bromus briziformisRATTLESNAKE CHESSNaturalized
Bromus carinatus
(Under Bromus sitchensis var. carinatus)
Synonym
Bromus carinatus var. marginatus
(Under Bromus sitchensis var. marginatus)
Synonym
Bromus carinatus var. maritimus
(Under Bromus sitchensis var. maritimus)
Synonym
Bromus caroli-henriciNaturalized
Bromus catharticusNaturalized
Bromus catharticus var. catharticusRESCUE GRASSNaturalized
Bromus catharticus var. elatusCHILEAN BROMENaturalized
Bromus cebadilla
(Under Bromus catharticus var. elatus)
Synonym
Bromus ciliatusFRINGED BROMENative
Bromus ciliatus var. richardsonii
(Under Bromus richardsonii)
Synonym
Bromus commutatusHAIRY CHESS, MEADOW BROMENaturalized
Bromus diandrusRIPGUT GRASSNaturalized
Bromus diandrus var. rigidus
(Under Bromus diandrus)
Synonym
Bromus grandisTALL BROMENative
Bromus halliiHALL'S BROMENative
Bromus hordeaceusSOFT CHESSNaturalized
Bromus hordeaceus subsp. divaricatus
(Under Bromus hordeaceus)
Synonym
Bromus hordeaceus subsp. molliformis
(Under Bromus hordeaceus)
Synonym
Bromus hordeaceus subsp. thominei
(Under Bromus hordeaceus)
Synonym
Bromus inermisSMOOTH BROME, HUNGARIAN BROMENaturalized
Bromus japonicusJAPANESE CHESS, JAPANESE BROMENaturalized
Bromus laevipesCHINOOK BROME, WOODLAND BROMENative
Bromus luzonensis
(Under Bromus sitchensis var. marginatus)
Synonym
Bromus madritensisFOXTAIL CHESS, MADRID BROMENaturalized
Bromus madritensis subsp. rubens
(Under Bromus rubens)
Synonym
Bromus marginatus
(Under Bromus sitchensis var. marginatus)
Synonym
Bromus marginatus subsp. maritimus
(Under Bromus sitchensis var. maritimus)
Synonym
Bromus maritimus
(Under Bromus sitchensis var. maritimus)
Synonym
Bromus molliformis
(Under Bromus hordeaceus)
Synonym
Bromus mollis
(Under Bromus hordeaceus)
Synonym
Bromus orcuttianusORCUTT'S BROMENative
Bromus orcuttianus var. hallii
(Under Bromus hallii)
Synonym
Bromus orcuttianus var. hallii
(Under Bromus orcuttianus)
Synonym
Bromus polyanthus var. paniculatus
(Under Bromus sitchensis var. polyanthus)
Synonym
Bromus porteriNODDING BROMENative
Bromus porteri var. assimilis
(Under Bromus grandis)
Synonym
Bromus pseudolaevipesWOODLAND BROMENative
Bromus racemosusSMOOTH BROMENaturalized
Bromus richardsoniiRICHARDSON'S BROMENative
Bromus rigidus
(Under Bromus diandrus)
Synonym
Bromus rubensRED BROMENaturalized
Bromus secalinusRYE BROMENaturalized
Bromus sitchensisNative
Bromus sitchensis var. carinatusCALIFORNIA BROMENative
Bromus sitchensis var. marginatusMOUNTAIN BROMENative
Bromus sitchensis var. maritimusMARITIME BROMENative
Bromus sitchensis var. polyanthusGREAT BASIN BROME, COLORADO BROMENative
Bromus sitchensis var. sitchensisSITKA BROME, ALASKA BROMENative
Bromus squarrosus var. squarrosusCORN BROMENaturalized
Bromus stamineus
(Under Bromus catharticus var. elatus)
Synonym
Bromus sterilisPOVERTY BROMENaturalized
Bromus subvelutinus
(Under Bromus sitchensis var. marginatus)
Synonym
Bromus suksdorfiiSUKSDORF'S BROMENative
Bromus tectorumCHEAT GRASS, DOWNY CHESSNaturalized
Bromus tectorum var. glabratus
(Under Bromus tectorum)
Synonym
Bromus trinii var. excelsus
(Under Bromus arizonicus)
Synonym
Bromus trinii var. trinii
(Under Bromus berteroanus)
Synonym
Bromus vulgarisCOLUMBIA BROMENative
Buddleja
  ↳  Key to Buddleja
BUTTERFLY BUSH
Buddleja davidiiBUTTERFLY BUSH, SUMMER LILACNaturalized
Buddleja salignaFALSE OLIVENaturalized
Buddleja utahensisPANAMINT BUTTERFLY BUSHNative
Buglossoides arvensis
(Under Lithospermum arvense)
Synonym
Bulbine
Bulbine semibarbataLEEK LILYWaif
Bulbostylis
Bulbostylis californica
(Under Brickellia californica)
Synonym
Bulbostylis capillarisTHREAD-LEAVED BEAKSEEDNative
Bulbostylis microphylla
(Under Brickellia microphylla var. microphylla)
Synonym
BurseraELEPHANT TREE, TOROTE, COPAL
Bursera microphyllaLITTLELEAF ELEPHANT TREENative
BurseraceaeTORCHWOOD FAMILY
Buxus chinensis
(Under Simmondsia chinensis)
Synonym
CabombaFANWORT
Cabomba carolinianaNaturalized
Cabomba peltata
(Under Brasenia schreberi)
Synonym
Cabombaceae
  ↳  Key to Cabombaceae
WATERSHIELD FAMILY
Cacaliopsis
Cacaliopsis nardosmiaNative
Cactaceae
  ↳  Key to Cactaceae
CACTUS FAMILY
Caesalpinia
  ↳  Key to Caesalpinia
Caesalpinia gilliesiiBIRD-OF-PARADISENaturalized
Caesalpinia spinosaTARANaturalized
Caesalpinia virgata
(Under Hoffmannseggia microphylla)
Synonym
Cakile
  ↳  Key to Cakile
SEA ROCKET
Cakile edentulaNaturalized
Cakile edentula subsp. californica
(Under Cakile edentula)
Synonym
Cakile maritimaNaturalized
Calamagrostis
  ↳  Key to Calamagrostis
REED GRASS
Calamagrostis bolanderiBOLANDER'S REED GRASSNative
Calamagrostis breweriSHORT HAIR REED GRASSNative
Calamagrostis canadensisNative
Calamagrostis canadensis var. canadensisBLUEJOINT REED GRASSNative
Calamagrostis canadensis var. langsdorffiiNative
Calamagrostis canadensis var. scabra
(Under Calamagrostis canadensis var. langsdorffii)
Synonym
Calamagrostis crassiglumis
(Under Calamagrostis stricta subsp. inexpansa)
Synonym
Calamagrostis densa
(Under Calamagrostis koelerioides)
Synonym
Calamagrostis foliosaLEAFY REED GRASSNative
Calamagrostis inexpansa
(Under Calamagrostis stricta subsp. inexpansa)
Synonym
Calamagrostis koelerioidesDENSE-PINE REED GRASSNative
Calamagrostis muirianaMUIR'S REED GRASSNative
Calamagrostis nutkaensisPACIFIC REED GRASSNative
Calamagrostis ophitidisSERPENTINE REED GRASSNative
Calamagrostis purpurascensPURPLE REED GRASSNative
Calamagrostis rubescensPINE REED GRASSNative
Calamagrostis strictaSLIPSTEM REED GRASSNative
Calamagrostis stricta subsp. inexpansaNative
Calamagrostis stricta subsp. strictaNative
Calamagrostis sylvatica var. longifolia
(Under Calamagrostis foliosa)
Synonym
Calamintha chandleri
(Under Clinopodium chandleri)
Synonym
Calandrinia
  ↳  Key to Calandrinia
Calandrinia ambigua
(Under Cistanthe ambigua)
Synonym
Calandrinia breweriBREWER'S CALANDRINIANative
Calandrinia grayi
(Under Lewisia pygmaea)
Synonym
Calandrinia howellii
(Under Lewisia cotyledon var. howellii)
Synonym
Calandrinia leeana
(Under Lewisia leeana)
Synonym
Calandrinia maritima
(Under Cistanthe maritima)
Synonym
Calandrinia menziesiiRED MAIDSNative
Calandrinia menziesii var. macrocarpa
(Under Calandrinia breweri)
Synonym
Calandrinia nevadensis
(Under Lewisia nevadensis)
Synonym
Calandrinia oppositifolia
(Under Lewisia oppositifolia)
Synonym
Calandrinia pygmaea
(Under Lewisia pygmaea)
Illegitimate name
Calendula
  ↳  Key to Calendula
Calendula arvensisFIELD-MARIGOLDNaturalized
Calendula fruticosa
(Under Dimorphotheca fruticosa)
Synonym
Calendula officinalisPOT-MARIGOLDNaturalized
Calia
Calia secundifloraTEXAS MOUNTAIN LAURELWaif
Calibrachoa parviflora
(Under Petunia parviflora)
Synonym
CaliforniaCALIFORNIA FILAREE
California macrophyllaROUND-LEAVED FILAREENative
CalliandraFAIRY-DUSTER
Calliandra eriophyllaPINK FAIRY-DUSTERNative
Calligonum canescens
(Under Atriplex canescens)
Synonym
Calliprora anilina
(Under Triteleia ixioides subsp. anilina)
Synonym
Calliprora aurantea
(Under Triteleia ixioides subsp. scabra)
Synonym
Calliprora ixioides var. lugens
(Under Triteleia lugens)
Synonym
Calliprora lugens
(Under Triteleia lugens)
Synonym
Calliprora lutea
(Under Triteleia ixioides subsp. ixioides)
Synonym
Calliprora scabra
(Under Triteleia ixioides subsp. scabra)
Synonym
Calliprora scabra var. anilina
(Under Triteleia ixioides subsp. anilina)
Synonym
Calliscirpus
  ↳  Key to Calliscirpus
COTTON GRASS
Calliscirpus brachythrixNative
Calliscirpus crinigerNative
Callistemon viminalis
(Under Melaleuca viminalis)
Synonym
Callitriche
  ↳  Key to Callitriche
WATER-STARWORT
Callitriche fassettiiNative
Callitriche hermaphroditica
(Under Callitriche fassettii)
Misapplied name
Callitriche heterophyllaNative
Callitriche heterophylla subsp. bolanderi
(Under Callitriche heterophylla var. bolanderi)
Synonym
Callitriche heterophylla var. bolanderiNative
Callitriche heterophylla var. heterophyllaNative
Callitriche longipedunculataNative
Callitriche marginataNative
Callitriche palustrisNative
Callitriche stagnalisNaturalized
Callitriche trochlearisNative
Callitriche verna
(Under Callitriche palustris)
Synonym
CallitropsisNOOTKA CYPRESS
Callitropsis abramsiana
(Under Hesperocyparis abramsiana)
Synonym
Callitropsis arizonica
(Under Hesperocyparis stephensonii)
Misapplied name
Callitropsis bakeri
(Under Hesperocyparis bakeri)
Synonym
Callitropsis forbesii
(Under Hesperocyparis forbesii)
Synonym
Callitropsis goveniana
(Under Hesperocyparis goveniana)
Synonym
Callitropsis macnabiana
(Under Hesperocyparis macnabiana)
Synonym
Callitropsis macrocarpa
(Under Hesperocyparis macrocarpa)
Synonym
Callitropsis nevadensis
(Under Hesperocyparis nevadensis)
Synonym
Callitropsis nootkatensisALASKA CEDARNative
Callitropsis nootkatensis
(Under Callitropsis nootkatensis)
Invalid name
Callitropsis nootkatensis
(Under Callitropsis nootkatensis)
Invalid name
Callitropsis pygmaea
(Under Hesperocyparis pigmaea)
Orthographic variant
Callitropsis sargentii
(Under Hesperocyparis sargentii)
Synonym
Callitropsis stephensonii
(Under Hesperocyparis stephensonii)
Synonym
CalocedrusINCENSE CEDAR
Calocedrus decurrensNative
Calochortus
  ↳  Key to Calochortus
Calochortus albusWHITE GLOBE LILY, FAIRY-LANTERNNative
Calochortus amabilisDIOGENES' LANTERNNative
Calochortus amoenusNative
Calochortus argillosusCLAY MARIPOSA LILYNative
Calochortus bruneaunisNative
Calochortus catalinaeCATALINA MARIPOSA LILYNative
Calochortus clavatusNative
Calochortus clavatus subsp. clavatus
(Under Calochortus clavatus var. clavatus)
Synonym
Calochortus clavatus subsp. pallidus
(Under Calochortus clavatus var. pallidus)
Synonym
Calochortus clavatus subsp. recurvifolius
(Under Calochortus clavatus var. recurvifolius)
Synonym
Calochortus clavatus var. aviusPLEASANT VALLEY MARIPOSA LILYNative
Calochortus clavatus var. clavatusCLUB-HAIRED MARIPOSA LILYNative
Calochortus clavatus var. gracilisSLENDER MARIPOSA LILYNative
Calochortus clavatus var. pallidusNative
Calochortus clavatus var. recurvifoliusARROYO DE LA CRUZ MARIPOSA LILYNative
Calochortus coeruleusBEAVERTAIL-GRASSNative
Calochortus coeruleus var. fimbriatus
(Under Calochortus coeruleus)
Synonym
Calochortus coeruleus var. westonii
(Under Calochortus westonii)
Synonym
Calochortus concolorNative
Calochortus davidsonianus
(Under Calochortus splendens)
Synonym
Calochortus dunniiDUNN'S MARIPOSA LILYNative
Calochortus elegansCAT'S EARNative
Calochortus elegans var. nanus
(Under Calochortus elegans)
Synonym
Calochortus excavatusINYO COUNTY STAR-TULIPNative
Calochortus fimbriatusNative
Calochortus flexuosusNative
Calochortus greeneiGREENE'S MARIPOSA LILYNative
Calochortus invenustusNative
Calochortus kennedyiNative
Calochortus kennedyi var. kennedyiNative
Calochortus kennedyi var. munziiNative
Calochortus leichtliniiNative
Calochortus longebarbatus var. longebarbatusLONG-HAIRED STAR-TULIPNative
Calochortus luteusNative
Calochortus macrocarpusNative
Calochortus minimusNative
Calochortus monanthusSINGLE-FLOWERED MARIPOSA LILYNative
Calochortus monophyllusYELLOW STAR-TULIPNative
Calochortus nudusNative
Calochortus nudus var. shastensis
(Under Calochortus nudus)
Synonym
Calochortus nuttallii var. bruneaunis
(Under Calochortus bruneaunis)
Synonym
Calochortus nuttallii var. panamintensis
(Under Calochortus panamintensis)
Synonym
Calochortus obispoensisSAN LUIS MARIPOSA LILYNative
Calochortus palmeriNative
Calochortus palmeri var. munziiSAN JACINTO MARIPOSA LILYNative
Calochortus palmeri var. palmeriPALMER'S MARIPOSA LILYNative
Calochortus panamintensisPANAMINT MARIPOSA LILYNative
Calochortus persistensSISKIYOU MARIPOSA LILYNative
Calochortus plummeraePLUMMER'S MARIPOSA LILYNative
Calochortus pulchellusMOUNT DIABLO FAIRY-LANTERNNative
Calochortus raicheiTHE CEDARS FAIRY-LANTERNNative
Calochortus simulansLA PANZA MARIPOSA LILYNative
Calochortus splendensNative
Calochortus striatusALKALI MARIPOSA LILYNative
Calochortus superbusNative
Calochortus syntrophusCALLAHAN'S MARIPOSA LILYNative
Calochortus tiburonensisTIBURON MARIPOSA LILYNative
Calochortus tolmieiPUSSY EARSNative
Calochortus umbellatusOAKLAND STAR-TULIPNative
Calochortus uniflorusPINK STAR-TULIPNative
Calochortus venustusNative
Calochortus venustus var. purpurescens
(Under Calochortus venustus)
Synonym
Calochortus vestaeNative
Calochortus weediiNative
Calochortus weedii var. intermediusINTERMEDIATE MARIPOSA LILYNative
Calochortus weedii var. vestus
(Under Calochortus fimbriatus)
Synonym
Calochortus weedii var. weediiNative
Calochortus westoniiSHIRLEY MEADOWS STAR-TULIPNative
Caltha
  ↳  Key to Caltha
MARSH MARIGOLD
Caltha leptosepalaNative
Caltha leptosepala subsp. howellii
(Under Caltha leptosepala)
Synonym
Caltha leptosepala var. biflora
(Under Caltha leptosepala)
Synonym
Caltha palustrisNaturalized
Calycadenia
  ↳  Key to Calycadenia
Calycadenia ciliosa
(Under Calycadenia fremontii)
Synonym
Calycadenia elegans
(Under Calycadenia fremontii)
Synonym
Calycadenia fremontiiNative
Calycadenia hispida
(Under Calycadenia multiglandulosa)
Synonym
Calycadenia hispida subsp. reducta
(Under Calycadenia multiglandulosa)
Synonym
Calycadenia hooveriHOOVER'S CALYCADENIANative
Calycadenia micranthaSMALL-FLOWERED CALYCADENIANative
Calycadenia mollisNative
Calycadenia multiglandulosaNative
Calycadenia multiglandulosa subsp. bicolor
(Under Calycadenia multiglandulosa)
Synonym
Calycadenia multiglandulosa subsp. cephalotes
(Under Calycadenia multiglandulosa)
Synonym
Calycadenia multiglandulosa subsp. robusta
(Under Calycadenia multiglandulosa)
Synonym
Calycadenia oppositifoliaBUTTE COUNTY CALYCADENIANative
Calycadenia paucifloraNative
Calycadenia spicataNative
Calycadenia tenella
(Under Osmadenia tenella)
Synonym
Calycadenia truncataROSIN WEEDNative
Calycadenia truncata subsp. microcephala
(Under Calycadenia micrantha)
Synonym, in part
Calycadenia truncata subsp. scabrella
(Under Calycadenia truncata)
Synonym
Calycadenia villosaDWARF CALYCADENIANative
CalycanthaceaeSWEET-SHRUB or CALYCANTHUS FAMILY
Calycanthus
Calycanthus occidentalisSWEET-SHRUB, SPICEBUSHNative
Calycoseris
  ↳  Key to Calycoseris
TACK-STEM
Calycoseris parryiYELLOW TACK-STEMNative
Calycoseris wrightiiWHITE TACK-STEMNative
CalypsoFAIRY SLIPPER
Calypso bulbosa var. occidentalisNative
Calyptridium
  ↳  Key to Calyptridium
PUSSYPAWS
Calyptridium arizonicumNative
Calyptridium monandrumNative
Calyptridium monospermumNative
Calyptridium parryiNative
Calyptridium parryi var. arizonicum
(Under Calyptridium arizonicum)
Synonym
Calyptridium parryi var. hesseaeSANTA CRUZ MOUNTAINS PUSSYPAWSNative
Calyptridium parryi var. nevadenseNative
Calyptridium parryi var. parryiNative
Calyptridium pulchellumMARIPOSA PUSSYPAWSNative
Calyptridium pygmaeumPYGMY PUSSYPAWSNative
Calyptridium quadripetalumFOUR-PETALED PUSSYPAWSNative
Calyptridium roseumROSY CALYPTRIDIUMNative
Calyptridium umbellatumNative
Calyptridium umbellatum var. caudiciferum
(Under Calyptridium umbellatum)
Synonym
Calyptridium umbellatum var. umbellatum
(Under Calyptridium umbellatum)
Synonym
Calystegia
  ↳  Key to Calystegia
MORNING-GLORY
Calystegia atriplicifolia subsp. buttensisBUTTE COUNTY MORNING-GLORYNative
Calystegia collinaNative
Calystegia collina subsp. collinaNative
Calystegia collina subsp. oxyphyllaMOUNT SAINT HELENA MORNING-GLORYNative
Calystegia collina subsp. tridactylosaTHREE-FINGERED MORNING-GLORYNative
Calystegia collina subsp. venustaSOUTH COAST RANGE MORNING-GLORYNative
Calystegia longipesNative
Calystegia macrostegiaNative
Calystegia macrostegia subsp. amplissimaISLAND MORNING-GLORYNative
Calystegia macrostegia subsp. aridaNative
Calystegia macrostegia subsp. cyclostegiaNative
Calystegia macrostegia subsp. intermediaNative
Calystegia macrostegia subsp. macrostegiaNative
Calystegia macrostegia subsp. tenuifoliaNative
Calystegia malacophyllaNative
Calystegia malacophylla subsp. malacophyllaNative
Calystegia malacophylla subsp. pedicellataNative
Calystegia occidentalisNative
Calystegia occidentalis subsp. fulcrataNative
Calystegia occidentalis subsp. occidentalisNative
Calystegia peirsoniiPEIRSON'S MORNING-GLORYNative
Calystegia purpurataNative
Calystegia purpurata subsp. purpurataNative
Calystegia purpurata subsp. saxicolaCOASTAL BLUFF MORNING-GLORYNative
Calystegia sepiumHEDGE BINDWEEDNative
Calystegia sepium subsp. binghamiaeSANTA BARBARA MORNING-GLORYNative
Calystegia sepium subsp. limnophilaNative
Calystegia silvatica subsp. disjunctaLARGE BINDWEEDNaturalized
Calystegia soldanellaNative
Calystegia stebbinsiiSTEBBINS' MORNING-GLORYNative
Calystegia subacaulisNative
Calystegia subacaulis subsp. episcopalisCAMBRIA MORNING-GLORYNative
Calystegia subacaulis subsp. subacaulisNative
Camassia
  ↳  Key to Camassia
CAMAS, QUAMASH
Camassia leichtlinii subsp. suksdorfiiNative
Camassia quamash subsp. brevifloraNative
Camassia quamash subsp. linearis
(Under Camassia quamash subsp. breviflora)
Synonym
Camassia quamash subsp. quamash
(Under Camassia leichtlinii subsp. suksdorfii)
Misapplied name
CamelinaFALSE FLAX
Camelina microcarpaNaturalized
Camissonia
  ↳  Key to Camissonia
SUN CUP
Camissonia andina
(Under Neoholmgrenia andina)
Synonym
Camissonia arenaria
(Under Chylismia arenaria)
Synonym
Camissonia benitensisSAN BENITO EVENING-PRIMROSENative
Camissonia bistorta
(Under Camissoniopsis bistorta)
Synonym
Camissonia boothii
(Under Eremothera boothii)
Synonym
Camissonia boothii subsp. alyssoides
(Under Eremothera boothii subsp. alyssoides)
Synonym
Camissonia boothii subsp. boothii
(Under Eremothera boothii subsp. boothii)
Synonym
Camissonia boothii subsp. condensata
(Under Eremothera boothii subsp. condensata)
Synonym
Camissonia boothii subsp. decorticans
(Under Eremothera boothii subsp. decorticans)
Synonym
Camissonia boothii subsp. desertorum
(Under Eremothera boothii subsp. desertorum)
Synonym
Camissonia boothii subsp. intermedia
(Under Eremothera boothii subsp. intermedia)
Synonym
Camissonia brevipes
(Under Chylismia brevipes)
Synonym
Camissonia brevipes subsp. arizonica
(Under Chylismia brevipes subsp. arizonica)
Synonym
Camissonia brevipes subsp. brevipes
(Under Chylismia brevipes subsp. brevipes)
Synonym
Camissonia brevipes subsp. pallidula
(Under Chylismia brevipes subsp. pallidula)
Synonym
Camissonia californica
(Under Eulobus californicus)
Synonym
Camissonia campestrisNative
Camissonia campestris subsp. campestrisNative
Camissonia campestris subsp. obispoensisNative
Camissonia cardiophylla
(Under Chylismia cardiophylla)
Synonym
Camissonia cardiophylla subsp. robusta
(Under Chylismia cardiophylla subsp. robusta)
Synonym
Camissonia chamaenerioides
(Under Eremothera chamaenerioides)
Synonym
Camissonia cheiranthifolia
(Under Camissoniopsis cheiranthifolia)
Synonym
Camissonia cheiranthifolia subsp. suffruticosa
(Under Camissoniopsis cheiranthifolia subsp. suffruticosa)
Synonym
Camissonia claviformis
(Under Chylismia claviformis)
Synonym
Camissonia claviformis subsp. aurantiaca
(Under Chylismia claviformis subsp. aurantiaca)
Synonym
Camissonia claviformis subsp. cruciformis
(Under Chylismia claviformis subsp. cruciformis)
Synonym
Camissonia claviformis subsp. funerea
(Under Chylismia claviformis subsp. funerea)
Synonym
Camissonia claviformis subsp. integrior
(Under Chylismia claviformis subsp. integrior)
Synonym
Camissonia claviformis subsp. lancifolia
(Under Chylismia claviformis subsp. lancifolia)
Synonym
Camissonia claviformis subsp. peirsonii
(Under Chylismia claviformis subsp. peirsonii)
Synonym
Camissonia claviformis subsp. yumae
(Under Chylismia claviformis subsp. yumae)
Synonym
Camissonia confusa
(Under Camissoniopsis confusa)
Synonym
Camissonia contortaNative
Camissonia graciliflora
(Under Tetrapteron graciliflorum)
Synonym
Camissonia guadalupensis subsp. clementina
(Under Camissoniopsis guadalupensis subsp. clementina)
Synonym
Camissonia hardhamiae
(Under Camissoniopsis hardhamiae)
Synonym
Camissonia heterochroma
(Under Chylismia heterochroma)
Synonym
Camissonia hirtella
(Under Camissoniopsis hirtella)
Synonym
Camissonia ignota
(Under Camissoniopsis ignota)
Synonym
Camissonia integrifoliaKERN RIVER EVENING-PRIMROSENative
Camissonia intermedia
(Under Camissoniopsis intermedia)
Synonym
Camissonia kernensisNative
Camissonia kernensis subsp. gilmaniiNative
Camissonia kernensis subsp. kernensisKERN COUNTY EVENING-PRIMROSENative
Camissonia lacustrisNative
Camissonia lewisii
(Under Camissoniopsis lewisii)
Synonym
Camissonia luciae
(Under Camissoniopsis luciae)
Synonym
Camissonia micrantha
(Under Camissoniopsis micrantha)
Synonym
Camissonia minor
(Under Eremothera minor)
Synonym
Camissonia munzii
(Under Chylismia munzii)
Synonym
Camissonia ovata
(Under Taraxia ovata)
Synonym
Camissonia pallida
(Under Camissoniopsis pallida)
Synonym
Camissonia pallida subsp. hallii
(Under Camissoniopsis pallida subsp. hallii)
Synonym
Camissonia pallida subsp. pallida
(Under Camissoniopsis pallida subsp. pallida)
Synonym
Camissonia palmeri
(Under Tetrapteron palmeri)
Synonym
Camissonia parvulaNative
Camissonia pterosperma
(Under Chylismiella pterosperma)
Synonym
Camissonia pubensNative
Camissonia pusillaNative
Camissonia refracta
(Under Eremothera refracta)
Synonym
Camissonia robusta
(Under Camissoniopsis robusta)
Synonym
Camissonia sierraeNative
Camissonia sierrae subsp. alticolaMONO HOT SPRINGS EVENING-PRIMROSENative
Camissonia sierrae subsp. sierraeYOSEMITE EVENING-PRIMROSENative
Camissonia strigulosaNative
Camissonia subacaulis
(Under Taraxia subacaulis)
Synonym
Camissonia tanacetifolia
(Under Taraxia tanacetifolia)
Synonym
Camissonia tanacetifolia subsp. quadriperforata
(Under Taraxia tanacetifolia)
Synonym
Camissonia walkeri subsp. tortilis
(Under Chylismia walkeri subsp. tortilis)
Synonym
Camissoniopsis
  ↳  Key to Camissoniopsis
Camissoniopsis bistortaCALIFORNIA SUN CUPNative
Camissoniopsis cheiranthifoliaBEACH EVENING-PRIMROSENative
Camissoniopsis cheiranthifolia subsp. cheiranthifoliaNative
Camissoniopsis cheiranthifolia subsp. suffruticosaNative
Camissoniopsis confusaNative
Camissoniopsis guadalupensis subsp. clementinaSAN CLEMENTE ISLAND EVENING-PRIMROSENative
Camissoniopsis hardhamiaeHARDHAM'S EVENING-PRIMROSENative
Camissoniopsis hirtellaNative
Camissoniopsis ignotaNative
Camissoniopsis intermediaNative
Camissoniopsis lewisiiLEWIS' EVENING-PRIMROSENative
Camissoniopsis luciaeNative
Camissoniopsis micranthaNative
Camissoniopsis pallidaNative
Camissoniopsis pallida subsp. halliiNative
Camissoniopsis pallida subsp. pallidaNative
Camissoniopsis robustaNative
Campanula
  ↳  Key to Campanula
HAREBELL
Campanula angustifloraNative
Campanula angustiflora var. exilis
(Under Campanula griffinii)
Synonym
Campanula californicaSWAMP HAREBELLNative
Campanula exiguaCHAPARRAL HAREBELLNative
Campanula griffiniiNative
Campanula prenanthoides
(Under Asyneuma prenanthoides)
Synonym
Campanula rotundifoliaNative
Campanula scabrellaROUGH HAREBELLNative
Campanula scouleriSCOULER'S HAREBELLNative
Campanula sharsmithiaeSHARSMITH'S HAREBELLNative
Campanula shetleriCASTLE CRAGS HAREBELLNative
Campanula wilkinsianaWILKINS' HAREBELLNative
Campanulaceae
  ↳  Key to Campanulaceae
BELLFLOWER FAMILY
CampsisTRUMPET-CREEPER
Campsis radicansWaif
Canbya
Canbya candidaWHITE PYGMY-POPPYNative
Cannabaceae
  ↳  Key to Cannabaceae
HEMP FAMILY
CannabisHEMP
Cannabis indica
(Under Cannabis sativa)
Synonym
Cannabis sativaHEMP, MARIJUANANaturalized
Cantua pungens
(Under Linanthus pungens)
Synonym
Capnorea californica
(Under Hesperochiron nanus)
Synonym
Capnorea campanulata
(Under Hesperochiron pumilus)
Synonym
Capnorea ciliata
(Under Hesperochiron pumilus)
Synonym
Capnorea fulcrata
(Under Hesperochiron pumilus)
Synonym
Capnorea hirtella
(Under Hesperochiron pumilus)
Synonym
Capnorea incanus
(Under Hesperochiron nanus)
Synonym
Capnorea lasiantha
(Under Hesperochiron nanus)
Synonym
Capnorea macilenta
(Under Hesperochiron nanus)
Synonym
Capnorea nana
(Under Hesperochiron nanus)
Synonym
Capnorea nervosa
(Under Hesperochiron pumilus)
Synonym
Capnorea pumila
(Under Hesperochiron pumilus)
Synonym
Capnorea strigosa
(Under Hesperochiron nanus)
Synonym
Capnorea villosula
(Under Hesperochiron pumilus)
Synonym
Capnorea watsoniana
(Under Hesperochiron nanus)
Synonym
Caprifoliaceae
  ↳  Key to Caprifoliaceae
HONEYSUCKLE FAMILY
CapsellaSHEPHERD'S PURSE
Capsella bursa-pastorisNaturalized
Cardamine
  ↳  Key to Cardamine
BITTER-CRESS
Cardamine angulataNative
Cardamine bellidifoliaNative
Cardamine bellidifolia var. pachyphylla
(Under Cardamine bellidifolia)
Synonym
Cardamine breweriNative
Cardamine breweri var. breweri
(Under Cardamine breweri)
Synonym
Cardamine breweri var. orbicularis
(Under Cardamine breweri)
Synonym
Cardamine californicaMILK MAIDS, TOOTH WORTNative
Cardamine californica var. californica
(Under Cardamine californica)
Synonym
Cardamine californica var. cardiophylla
(Under Cardamine californica)
Synonym
Cardamine californica var. cuneata
(Under Cardamine californica)
Synonym
Cardamine californica var. integrifolia
(Under Cardamine californica)
Synonym
Cardamine californica var. sinuata
(Under Cardamine californica)
Synonym
Cardamine cordifoliaNative
Cardamine cordifolia var. lyallii
(Under Cardamine cordifolia)
Synonym
Cardamine gambelii
(Under Nasturtium gambelii)
Synonym
Cardamine gemmata
(Under Cardamine nuttallii)
Synonym
Cardamine hirsutaNaturalized
Cardamine lyallii
(Under Cardamine cordifolia)
Synonym
Cardamine nuttalliiNative
Cardamine nuttallii var. covilleana
(Under Cardamine nuttallii)
Synonym
Cardamine nuttallii var. dissecta
(Under Cardamine nuttallii)
Synonym
Cardamine nuttallii var. gemmata
(Under Cardamine nuttallii)
Synonym
Cardamine nuttallii var. nuttallii
(Under Cardamine nuttallii)
Synonym
Cardamine occidentalisNative
Cardamine oligospermaNative
Cardamine pachystigmaNative
Cardamine pachystigma var. dissectifolia
(Under Cardamine californica)
Synonym
Cardamine pensylvanicaNative
Cardamine pulcherrima var. tenella
(Under Cardamine nuttallii)
Synonym
Cardamine tenella var. dissecta
(Under Cardamine nuttallii)
Synonym
Cardaria chalepensis
(Under Lepidium chalepense)
Synonym
Cardaria draba
(Under Lepidium draba)
Synonym
Cardaria draba subsp. chalepensis
(Under Lepidium chalepense)
Synonym
Cardaria pubescens
(Under Lepidium appelianum)
Synonym
Cardaria pubescens var. elongata
(Under Lepidium appelianum)
Synonym
Cardionema
Cardionema ramosissimumSANDMATNative
Carduus
  ↳  Key to Carduus
Carduus acanthoides subsp. acanthoidesPLUMELESS THISTLENaturalized
Carduus nutansMUSK THISTLENaturalized
Carduus nutans var. leiophyllus
(Under Carduus nutans)
Synonym
Carduus pycnocephalus subsp. pycnocephalusITALIAN THISTLENaturalized
Carduus tenuiflorusNaturalized
Carex
  ↳  Key to Carex
SEDGE
Carex ablata
(Under Carex luzulina)
Synonym
Carex abruptaABRUPT-BEAKED SEDGENative
Carex albida
(Under Carex lemmonii)
Synonym
Carex almaSTURDY SEDGENative
Carex amplectens
(Under Carex fracta)
Synonym
Carex amplifoliaBIG-LEAF SEDGENative
Carex angustataNARROW-LEAVED SEDGENative
Carex angustior
(Under Carex echinata subsp. echinata)
Synonym
Carex aquatilisNative
Carex aquatilis var. aquatilisWATER SEDGENative
Carex aquatilis var. divesSITKA SEDGENative
Carex arctaNORTHERN CLUSTERED SEDGENative
Carex atherodesWHEAT SEDGENative
Carex athrostachyaLONG-BRACTED SEDGENative
Carex aureaGOLDEN SEDGENative
Carex aurea var. androgyna
(Under Carex hassei)
Synonym
Carex barbaraeWHITEROOT or SANTA BARBARA SEDGENative
Carex bella
(Under Carex heteroneura)
Misapplied name
Carex bifida
(Under Carex serratodens)
Illegitimate name
Carex bolanderiBOLANDER'S SEDGENative
Carex brainerdiiBRAINERD'S SEDGENative
Carex brevicaulisSHORT-STEMMED SEDGENative
Carex breviligulata
(Under Carex densa)
Synonym
Carex brevipes
(Under Carex deflexa var. boottii)
Synonym
Carex breweriBREWER'S SEDGENative
Carex brunnescens
(Under Carex laeviculmis)
Misapplied name
Carex buxbaumiiBUXBAUM'S SEDGENative
Carex californicaCALIFORNIA SEDGENative
Carex canescens subsp. canescensSILVERY SEDGENative
Carex capitataCAPITATE SEDGENative
Carex capitata subsp. arctogena
(Under Carex capitata)
Synonym
Carex capitata subsp. capitata
(Under Carex capitata)
Synonym
Carex comosaBRISTLY SEDGENative
Carex concinnoidesNORTHWESTERN SEDGENative
Carex congdoniiCONGDON'S SEDGENative
Carex constanceana
(Under Carex davyi)
Synonym
Carex cusickiiCUSICK'S SEDGENative
Carex cyrtostachyaARCHING SEDGENative
Carex danaensis
(Under Carex incurviformis)
Synonym
Carex davyiDAVY'S SEDGENative
Carex deflexa var. boottiiMOUNTAIN MAT SEDGENative
Carex densaDENSE SEDGENative
Carex deweyana subsp. leptopoda
(Under Carex leptopoda)
Synonym
Carex diandraLESSER TUSSOCK SEDGENative
Carex dispermaTWO-SEEDED SEDGENative
Carex divulsa subsp. divulsaGRAY SEDGENaturalized
Carex douglasiiDOUGLAS' SEDGENative
Carex dudleyi
(Under Carex densa)
Synonym
Carex duriusculaSPIKELETRUSH SEDGENative
Carex eastwoodiana
(Under Carex tahoensis)
Synonym
Carex echinataNative
Carex echinata subsp. echinataSTAR SEDGENative
Carex echinata subsp. phyllomanicaCOASTAL STAR SEDGENative
Carex eleocharis
(Under Carex duriuscula)
Synonym
Carex epapillosa
(Under Carex heteroneura)
Synonym
Carex eurycarpa
(Under Carex angustata)
Synonym
Carex exserta
(Under Carex filifolia var. erostrata)
Synonym
Carex exsiccataWESTERN INFLATED SEDGENative
Carex festivella
(Under Carex microptera)
Synonym
Carex fetaGREEN-SHEATHED SEDGENative
Carex filifoliaNative
Carex filifolia var. erostrataSAGEBRUSH SEDGENative
Carex filifolia var. filifoliaTHREAD-LEAVED SEDGENative
Carex fissuricolaCLEFT SEDGENative
Carex fractaFRAGILE-SHEATHED SEDGENative
Carex garberi
(Under Carex hassei)
Misapplied name
Carex geophila
(Under Carex rossii)
Misapplied name
Carex geyeriGEYER'S SEDGENative
Carex gigas
(Under Carex scabriuscula)
Synonym
Carex globosaROUND-FRUITED SEDGENative
Carex graciliorSLENDER SEDGENative
Carex gymnoclada
(Under Carex scopulorum var. bracteosa)
Synonym
Carex gynodynamaWONDER-WOMAN SEDGENative
Carex hallianaOREGON SEDGENative
Carex harfordiiHARFORD'S SEDGE, MONTEREY SEDGENative
Carex hasseiHASSE'S SEDGENative
Carex haydenianaCLOUD or HAYDEN'S SEDGENative
Carex helleriHELLER'S SEDGENative
Carex hendersoniiTIMBER or HENDERSON'S SEDGENative
Carex heteroneuraSMOOTH-FRUITED SEDGENative
Carex heteroneura var. epapillosa
(Under Carex heteroneura)
Synonym
Carex heteroneura var. heteroneura
(Under Carex heteroneura)
Synonym
Carex hindsii
(Under Carex lenticularis var. limnophila)
Synonym
Carex hirtissimaFUZZY SEDGENative
Carex hoodiiHOOD'S SEDGENative
Carex hystericinaPORCUPINE SEDGENative
Carex hystricina
(Under Carex hystericina)
Orthographic variant
Carex idahoaIDAHO SEDGENative
Carex illotaSHEEP SEDGENative
Carex incurviformisMOUNT DANA or INCURVED SEDGENative
Carex incurviformis var. danaensis
(Under Carex incurviformis)
Synonym
Carex incurviformis var. incurviformis
(Under Carex incurviformis)
Synonym
Carex infirminerviaWEAKLY VEINED SEDGENative
Carex inflata
(Under Carex vesicaria)
Misapplied name
Carex inops subsp. inopsVOLCANO or LONG-RHIZOMED SEDGENative
Carex integraSMOOTH-BEAKED SEDGENative
Carex interiorINLAND SEDGENative
Carex inversaKANGAROO or KNOB SEDGENaturalized
Carex jepsonii
(Under Carex whitneyi)
Synonym
Carex jonesiiJONES' SEDGENative
Carex kelloggii
(Under Carex lenticularis var. lipocarpa)
Synonym
Carex klamathensisKLAMATH SEDGENative
Carex laeviculmisSMOOTH-STEMMED SEDGENative
Carex lanuginosa
(Under Carex pellita)
Misapplied name
Carex lasiocarpaWOOLLY-FRUITED SEDGENative
Carex leavenworthiiLEAVENWORTH SEDGEUrban weed
Carex lemmoniiLEMMON'S SEDGENative
Carex lenticularisNative
Carex lenticularis var. impressaTARN SEDGENative
Carex lenticularis var. limnophilaLAGOON SEDGENative
Carex lenticularis var. lipocarpaLAKESHORE SEDGENative
Carex leporinaHARE or OVAL SEDGENative
Carex leporinellaBOG HARE SEDGENative
Carex leptaleaBRISTLE-STALKED SEDGENative
Carex leptopodaSLENDER-FOOTED SEDGENative
Carex liddonii
(Under Carex petasata)
Synonym
Carex limosaMUD SEDGENative
Carex lividaLIVID SEDGENative
Carex longiiGREEN-AND-WHITE SEDGENaturalized
Carex luzulifoliaLITTLE-LEAVED SEDGENative
Carex luzulinaWOODRUSH SEDGENative
Carex luzulina var. ablata
(Under Carex luzulina)
Synonym
Carex luzulina var. atropurpurea
(Under Carex luzulina)
Synonym
Carex luzulina var. luzulina
(Under Carex luzulina)
Synonym
Carex lyngbyeiLYNGBYE'S SEDGENative
Carex macloviana subsp. pachystachya
(Under Carex pachystachya)
Synonym
Carex mariposanaMARIPOSA SEDGENative
Carex mendocinensisMENDOCINO SEDGENative
Carex mertensiiMERTENS' SEDGENative
Carex micropoda
(Under Carex subnigricans)
Misapplied name
Carex micropteraSMALL-WINGED SEDGENative
Carex microstachys
(Under Carex leptalea)
Synonym
Carex montereyensis
(Under Carex harfordii)
Synonym
Carex multicaulisSTICK SEDGENative
Carex multicostataMANY-RIBBED SEDGENative
Carex nebrascensisNEBRASKA SEDGENative
Carex nervinaSIERRA SEDGENative
Carex neurophoraVEINED or ALPINE NERVED SEDGENative
Carex nigricansBLACK ALPINE SEDGENative
Carex norvegica
(Under Carex stevenii)
Misapplied name
Carex novae-angliae var. rossii
(Under Carex rossii)
Synonym
Carex nubicola
(Under Carex haydeniana)
Synonym
Carex nudataTORRENT SEDGENative
Carex obispoensisSAN LUIS OBISPO SEDGENative
Carex obnuptaSLOUGH SEDGENative
Carex occidentalisWESTERN SEDGENative
Carex oederi
(Under Carex viridula subsp. viridula)
Synonym
Carex olympica
(Under Carex pachystachya)
Synonym
Carex oregonensis
(Under Carex halliana)
Superfluous name
Carex oresteraBOULDER SEDGENative
Carex ormantha
(Under Carex echinata subsp. echinata)
Synonym
Carex ovalis
(Under Carex leporina)
Synonym
Carex oxycarpa
(Under Carex angustata)
Synonym
Carex pachycarpaFURROWED BROOMSEDGENative
Carex pachystachyaSTARRY BROOMSEDGENative
Carex pachystachya var. gracilis
(Under Carex pachystachya)
Synonym
Carex pansaSAND DUNE SEDGENative
Carex parryana subsp. idahoa
(Under Carex idahoa)
Synonym
Carex parryana var. hallii
(Under Carex idahoa)
Misapplied name
Carex paucicostata
(Under Carex lenticularis var. impressa)
Synonym
Carex paucifructus
(Under Carex mariposana)
Synonym
Carex pellitaWOOLLY SEDGENative
Carex pendulaPENDULOUS SEDGENaturalized
Carex pensylvanica var. vespertina
(Under Carex inops subsp. inops)
Synonym
Carex petasataLIDDON'S SEDGENative
Carex phaeocephalaDUNHEAD or ALPINE HARE SEDGENative
Carex phaeocephala f. eastwoodiana
(Under Carex tahoensis)
Synonym
Carex phyllomanica
(Under Carex echinata subsp. phyllomanica)
Synonym
Carex piperi
(Under Carex praticola)
Synonym
Carex polytrichoides
(Under Carex leptalea)
Synonym
Carex praeceptorumTEACHER SEDGENative
Carex praegracilisBLACK CREEPER or FREEWAY SEDGENative
Carex praticolaNORTHERN MEADOW SEDGENative
Carex presliiPRESL'S SEDGENative
Carex propositaPOTATO CHIP SEDGENative
Carex pseudoscirpoidea
(Under Carex scirpoidea subsp. pseudoscirpoidea)
Synonym
Carex pyrenaica
(Under Carex subnigricans)
Misapplied name
Carex raynoldsiiRAYNOLD'S SEDGENative
Carex retroflexa var. texensis
(Under Carex texensis)
Synonym
Carex rossiiROSS' SEDGENative
Carex rostrata
(Under Carex utriculata)
Misapplied name
Carex saliniformisDECEIVING SEDGENative
Carex sartwellianaSARTWELL'S or YOSEMITE SEDGENative
Carex scabriusculaSISKIYOU SEDGENative
Carex schottiiSCHOTT'S SEDGENative
Carex scirpoidea subsp. pseudoscirpoideaWESTERN SINGLE-SPIKED SEDGENative
Carex scirpoidea var. pseudoscirpoidea
(Under Carex scirpoidea subsp. pseudoscirpoidea)
Synonym
Carex scoparia var. scopariaPOINTED BROOMSEDGENative
Carex scopulorum var. bracteosaMOUNTAIN SEDGENative
Carex sentaWESTERN ROUGH SEDGENative
Carex serpenticolaSERPENTINE SEDGENative
Carex serratodensSAW-TOOTHED SEDGENative
Carex sheldoniiSHELDON'S SEDGENative
Carex simulataSHORT-BEAKED or ANALOG SEDGENative
Carex sitchensis
(Under Carex aquatilis var. dives)
Synonym
Carex sonomensis
(Under Carex lemmonii)
Synonym
Carex specificaNARROW-FRUITED SEDGENative
Carex spectabilisSHOWY SEDGENative
Carex spissaSAN DIEGO SEDGENative
Carex steveniiSTEVEN'S SEDGENative
Carex stipata var. stipataAWL-FRUITED SEDGENative
Carex straminiformisMOUNT SHASTA SEDGENative
Carex subbracteataSMALL-BRACTED SEDGENative
Carex subfuscaRUSTY or PALE BROOMSEDGENative
Carex subnigricansDARK MOUNTAIN SEDGENative
Carex tahoensisTAHOE SEDGENative
Carex teneriformis
(Under Carex subfusca)
Synonym
Carex texensisTEXAS SEDGENaturalized
Carex tioganaTIOGA PASS SEDGENative
Carex tompkinsiiTOMPKINS' SEDGENative
Carex tracyi
(Under Carex leporina)
Synonym
Carex triquetraTRIGONOUS SEDGENative
Carex tumulicolaFOOTHILL SEDGENative
Carex unilateralisONE-SIDED SEDGENative
Carex utriculataSOUTHERN BEAKED SEDGENative
Carex vallicolaWESTERN VALLEY SEDGENative
Carex vernaculaFOETID SEDGENative
Carex vesicariaINFLATED SEDGENative
Carex vesicaria var. major
(Under Carex exsiccata)
Synonym
Carex vicaria
(Under Carex densa)
Synonym
Carex viridula subsp. viridulaGREEN YELLOW SEDGENative
Carex viridula var. viridula
(Under Carex viridula subsp. viridula)
Synonym
Carex vulpinoideaBROWN FOX SEDGENaturalized
Carex whitneyiWHITNEY'S SEDGENative
Carex xerophilaCHAPARRAL SEDGENative
Carex yosemitana
(Under Carex sartwelliana)
Synonym
Carlowrightia
Carlowrightia arizonicaARIZONA CARLOWRIGHTIA, ARIZONA WRIGHTWORTNative
Carlquistia
Carlquistia muiriiMUIR'S TARPLANTNative
CarnegieaSAGUARO
Carnegiea giganteaNative
Caroxylon vermiculatum
(Under Salsola damascena)
Synonym, in part
Carpenteria
Carpenteria californicaTREE-ANEMONENative
Carpobrotus
  ↳  Key to Carpobrotus
Carpobrotus chilensisSEA FIGNaturalized
Carpobrotus edulisFREEWAY ICEPLANTNaturalized
Carrichtera
Carrichtera annuaWaif
Carsonia sparsifolia
(Under Cleomella sparsifolia)
Synonym
Carthamus
  ↳  Key to Carthamus
DISTAFF THISTLE
Carthamus baeticus
(Under Carthamus creticus)
Synonym
Carthamus creticusSMOOTH DISTAFF THISTLENaturalized
Carthamus lanatusWOOLLY DISTAFF THISTLENaturalized
Carthamus lanatus subsp. baeticus
(Under Carthamus creticus)
Synonym
Carthamus lanatus subsp. lanatus
(Under Carthamus lanatus)
Synonym
Carthamus leucocaulosWHITESTEM DISTAFF THISTLEExtirpated alien
Carthamus tinctoriusSAFFLOWERWaif
Carum lemmonii
(Under Perideridia lemmonii)
Synonym
CaryaHICKORY
Carya illinoinensisPECANNaturalized
Caryophyllaceae
  ↳  Key to Caryophyllaceae
PINK FAMILY
Cascadia
Cascadia nuttalliiNative
Cassia armata
(Under Senna armata)
Synonym
Cassia artemisioides
(Under Senna artemisioides)
Synonym
Cassia covesii
(Under Senna covesii)
Synonym
Cassia didymobotrya
(Under Senna didymobotrya)
Synonym
Cassia eremophila
(Under Senna artemisioides)
Synonym
Cassia marilandica
(Under Senna marilandica)
Synonym
Cassia tomentosa
(Under Senna multiglandulosa)
Synonym
CassiopeMOSS HEATHER
Cassiope mertensianaWHITE HEATHERNative
Castanea chrysophylla
(Under Chrysolepis chrysophylla var. chrysophylla)
Synonym
Castanopsis chrysophylla var. chrysophylla
(Under Chrysolepis chrysophylla var. chrysophylla)
Synonym
Castanopsis chrysophylla var. minor
(Under Chrysolepis chrysophylla var. minor)
Synonym
Castanopsis sempervirens
(Under Chrysolepis sempervirens)
Synonym
Castela
Castela emoryiEMORY'S CRUCIFIXION-THORNNative
Castilleja
  ↳  Key to Castilleja
PAINTBRUSH, OWL'S-CLOVER
Castilleja affinisNative
Castilleja affinis subsp. affinisNative
Castilleja affinis subsp. litoralisOREGON COAST PAINTBRUSHNative
Castilleja affinis subsp. neglectaTIBURON PAINTBRUSHNative
Castilleja ambiguaJOHNNY-NIPNative
Castilleja ambigua subsp. ambiguaNative
Castilleja ambigua subsp. humboldtiensisHUMBOLDT BAY OWL'S-CLOVERNative
Castilleja ambigua subsp. insalutataNative
Castilleja angustifolia
(Under Castilleja chromosa)
Misapplied name
Castilleja applegateiNative
Castilleja applegatei subsp. distichaNative
Castilleja applegatei subsp. martiniiNative
Castilleja applegatei subsp. pallidaNative
Castilleja applegatei subsp. pinetorumNative
Castilleja arachnoideaNative
Castilleja arachnoidea subsp. schizotricha
(Under Castilleja schizotricha)
Synonym
Castilleja arachnoidea subsp. shastensis
(Under Castilleja arachnoidea)
Synonym
Castilleja attenuataVALLEY TASSELSNative
Castilleja brevilobataSHORT-LOBED PAINTBRUSHNative
Castilleja brevistylaNative
Castilleja breweri
(Under Castilleja applegatei subsp. pallida)
Synonym
Castilleja breweri var. pallida
(Under Castilleja applegatei subsp. pallida)
Synonym
Castilleja campestrisNative
Castilleja campestris subsp. campestrisNative
Castilleja campestris subsp. succulentaSUCCULENT OWL'S-CLOVERNative
Castilleja chromosaDESERT PAINTBRUSHNative
Castilleja cinereaASH-GRAY PAINTBRUSHNative
Castilleja culbertsonii
(Under Castilleja lemmonii)
Synonym
Castilleja densifloraNative
Castilleja densiflora subsp. densifloraNative
Castilleja densiflora subsp. gracilisNative
Castilleja densiflora subsp. obispoensisSAN LUIS OBISPO OWL'S-CLOVERNative
Castilleja disticha
(Under Castilleja applegatei subsp. disticha)
Synonym
Castilleja elata
(Under Castilleja miniata subsp. elata)
Synonym
Castilleja exilis
(Under Castilleja minor subsp. minor)
Synonym
Castilleja exsertaPURPLE OWL'S-CLOVERNative
Castilleja exserta subsp. exsertaNative
Castilleja exserta subsp. latifoliaNative
Castilleja exserta subsp. venustaNative
Castilleja foliolosaWOOLLY PAINTBRUSHNative
Castilleja franciscana
(Under Castilleja subinclusa subsp. franciscana)
Synonym
Castilleja gleasoniMOUNT GLEASON PAINTBRUSHNative
Castilleja griseaSAN CLEMENTE ISLAND PAINTBRUSHNative
Castilleja hispida subsp. brevilobata
(Under Castilleja brevilobata)
Synonym
Castilleja hololeucaISLAND PAINTBRUSHNative
Castilleja hololeuca subsp. grisea
(Under Castilleja grisea)
Synonym
Castilleja jepsonii
(Under Castilleja subinclusa subsp. subinclusa)
Synonym
Castilleja laceraNative
Castilleja lanata subsp. hololeuca
(Under Castilleja hololeuca)
Synonym
Castilleja lasiorhynchaSAN BERNARDINO MOUNTAINS OWL'S-CLOVERNative
Castilleja latifoliaMONTEREY COAST PAINTBRUSHNative
Castilleja latifolia subsp. mendocinensis
(Under Castilleja mendocinensis)
Synonym
Castilleja lemmoniiNative
Castilleja linariifoliaNative
Castilleja linearilobaNative
Castilleja litoralis
(Under Castilleja affinis subsp. litoralis)
Synonym
Castilleja martinii
(Under Castilleja applegatei subsp. martinii)
Synonym
Castilleja martinii var. clokeyi
(Under Castilleja applegatei subsp. martinii)
Synonym
Castilleja mendocinensisMENDOCINO COAST PAINTBRUSHNative
Castilleja miniataNative
Castilleja miniata subsp. elataSISKIYOU PAINTBRUSHNative
Castilleja miniata subsp. miniataNative
Castilleja minorNative
Castilleja minor subsp. minorNative
Castilleja minor subsp. spiralisNative
Castilleja mollisSOFT-LEAVED PAINTBRUSHNative
Castilleja montigenaHECKARD'S PAINTBRUSHNative
Castilleja nanaNative
Castilleja neglecta
(Under Castilleja affinis subsp. neglecta)
Synonym
Castilleja oblongifolia
(Under Castilleja miniata subsp. miniata)
Synonym
Castilleja parviflora
(Under Castilleja peirsonii)
Misapplied name
Castilleja peirsoniiNative
Castilleja pilosaNative
Castilleja pilosa subsp. jusselii
(Under Castilleja pilosa)
Synonym
Castilleja plagiotomaMOJAVE PAINTBRUSHNative
Castilleja praeteritaNative
Castilleja pruinosaNative
Castilleja pruinosa
(Under Castilleja gleasoni)
Misapplied name, in part
Castilleja psittacina
(Under Castilleja pilosa)
Synonym
Castilleja roseana
(Under Castilleja applegatei subsp. martinii)
Synonym
Castilleja rubicundulaCREAM SACSNative
Castilleja rubicundula subsp. lithospermoidesNative
Castilleja rubicundula subsp. rubicundulaPINK CREAMSACSNative
Castilleja schizotrichaSPLIT-HAIR PAINTBRUSHNative
Castilleja stenantha
(Under Castilleja minor subsp. spiralis)
Synonym
Castilleja stenantha subsp. spiralis
(Under Castilleja minor subsp. spiralis)
Synonym
Castilleja subinclusaNative
Castilleja subinclusa subsp. franciscanaNative
Castilleja subinclusa subsp. subinclusaNative
Castilleja succulenta
(Under Castilleja campestris subsp. succulenta)
Synonym
Castilleja tenuisNative
Castilleja wightiiNative
Catalpa
  ↳  Key to Catalpa
SOUTHERN CATALPA
Catalpa bignonioidesNaturalized
Catalpa speciosaNaturalized
Catharanthus
Catharanthus roseusMADAGASCAR PERIWINKLEWaif
Caucalis microcarpa
(Under Yabea microcarpa)
Synonym
Caulanthus
  ↳  Key to Caulanthus
JEWELFLOWER
Caulanthus amplexicaulisNative
Caulanthus amplexicaulis var. amplexicaulis
(Under Caulanthus amplexicaulis)
Synonym
Caulanthus amplexicaulis var. barbarae
(Under Caulanthus amplexicaulis)
Synonym
Caulanthus ancepsNative
Caulanthus californicusCALIFORNIA JEWELFLOWERNative
Caulanthus cooperiNative
Caulanthus coulteriNative
Caulanthus coulteri var. lemmonii
(Under Caulanthus lemmonii)
Synonym
Caulanthus crassicaulisTHICK-STEM WILD CABBAGENative
Caulanthus crassicaulis var. crassicaulis
(Under Caulanthus crassicaulis)
Synonym
Caulanthus crassicaulis var. glaber
(Under Caulanthus crassicaulis)
Synonym
Caulanthus flavescensNative
Caulanthus glaber
(Under Caulanthus crassicaulis)
Synonym
Caulanthus glaucusNative
Caulanthus halliiNative
Caulanthus heterophyllusNative
Caulanthus heterophyllus var. pseudosimulans
(Under Caulanthus heterophyllus)
Synonym ined.
Caulanthus inflatusDESERT CANDLENative
Caulanthus lasiophyllusCALIFORNIA MUSTARDNative
Caulanthus lasiophyllus var. inalienus
(Under Caulanthus lasiophyllus)
Synonym
Caulanthus lasiophyllus var. rigidus
(Under Caulanthus lasiophyllus)
Synonym
Caulanthus lasiophyllus var. utahensis
(Under Caulanthus lasiophyllus)
Synonym
Caulanthus lemmoniiLEMMON'S JEWELFLOWERNative
Caulanthus majorNative
Caulanthus major var. major
(Under Caulanthus major)
Synonym
Caulanthus major var. nevadensis
(Under Caulanthus major)
Synonym
Caulanthus pilosusCHOCOLATE DROPSNative
Caulanthus simulansPAYSON'S JEWELFLOWERNative
Caulanthus stenocarpus
(Under Caulanthus heterophyllus)
Synonym
Caulostramina jaegeri
(Under Hesperidanthus jaegeri)
Synonym
Ceanothus
  ↳  Key to Ceanothus
CALIFORNIA-LILAC
Ceanothus ×otayensis
(Under Ceanothus otayensis)
Synonym
Ceanothus andersonii
(Under Ceanothus integerrimus var. integerrimus)
Synonym
Ceanothus arboreusFELTLEAF CEANOTHUSNative
Ceanothus arboreus var. arboreus
(Under Ceanothus arboreus)
Synonym
Ceanothus arboreus var. glaber
(Under Ceanothus arboreus)
Synonym
Ceanothus arboreus var. glabra
(Under Ceanothus arboreus)
Superfluous name
Ceanothus arcuatusARCHING CEANOTHUSNative
Ceanothus confususRINCON RIDGE CEANOTHUSNative
Ceanothus cordulatusMOUNTAIN WHITETHORNNative
Ceanothus crassifoliusHOARYLEAF CEANOTHUSNative
Ceanothus crassifolius var. crassifoliusNative
Ceanothus crassifolius var. planusNative
Ceanothus cuneatusNative
Ceanothus cuneatus var. cuneatusBUCKBRUSHNative
Ceanothus cuneatus var. dubius
(Under Ceanothus cuneatus var. cuneatus)
Synonym
Ceanothus cuneatus var. fascicularisLOMPOC CEANOTHUSNative
Ceanothus cuneatus var. ramulosusNative
Ceanothus cuneatus var. rigidus
(Under Ceanothus rigidus)
Synonym
Ceanothus cuneatus var. submontanus
(Under Ceanothus cuneatus var. cuneatus)
Synonym
Ceanothus cyaneusLAKESIDE CEANOTHUSNative
Ceanothus decornutusNICASIO CEANOTHUSNative
Ceanothus dentatusNative
Ceanothus divaricatus var. laetiflorus
(Under Ceanothus leucodermis)
Synonym
Ceanothus divergensCALISTOGA CEANOTHUSNative
Ceanothus divergens subsp. confusus
(Under Ceanothus confusus)
Synonym
Ceanothus diversifoliusPINE MATNative
Ceanothus ferrisae
(Under Ceanothus ferrisiae)
Orthographic variant
Ceanothus ferrisiaeCOYOTE CEANOTHUSNative
Ceanothus floribundus
(Under Ceanothus dentatus)
Synonym
Ceanothus foliosusNative
Ceanothus foliosus var. foliosusWAVYLEAF CEANOTHUSNative
Ceanothus foliosus var. mediusLA CUESTA CEANOTHUSNative
Ceanothus foliosus var. viejasensisVIEJAS MOUNTAIN CEANOTHUSNative
Ceanothus foliosus var. vineatusVINE HILL CEANOTHUSNative
Ceanothus fresnensisFRESNO CEANOTHUSNative
Ceanothus gloriosusNative
Ceanothus gloriosus var. exaltatusGLORY BRUSHNative
Ceanothus gloriosus var. gloriosusPOINT REYES CEANOTHUSNative
Ceanothus gloriosus var. porrectusMOUNT VISION CEANOTHUSNative
Ceanothus greggii var. perplexans
(Under Ceanothus perplexans)
Synonym
Ceanothus greggii var. vestitus
(Under Ceanothus pauciflorus)
Synonym
Ceanothus griseus
(Under Ceanothus thyrsiflorus var. griseus)
Synonym
Ceanothus hearstiorumHEARSTS' CEANOTHUSNative
Ceanothus impressusNative
Ceanothus impressus var. impressusNative
Ceanothus impressus var. nipomensisNative
Ceanothus incanusCOAST WHITETHORNNative
Ceanothus insularis
(Under Ceanothus megacarpus var. insularis)
Synonym
Ceanothus integerrimusDEER BRUSHNative
Ceanothus integerrimus var. californicus
(Under Ceanothus integerrimus var. macrothyrsus)
Synonym
Ceanothus integerrimus var. integerrimusNative
Ceanothus integerrimus var. macrothyrsusNative
Ceanothus integerrimus var. peduncularis
(Under Ceanothus integerrimus var. macrothyrsus)
Synonym
Ceanothus integerrimus var. puberulus
(Under Ceanothus integerrimus var. macrothyrsus)
Synonym
Ceanothus jepsoniiMUSK BRUSHNative
Ceanothus jepsonii var. albiflorus
(Under Ceanothus jepsonii)
Synonym
Ceanothus jepsonii var. jepsonii
(Under Ceanothus jepsonii)
Synonym
Ceanothus lemmoniiNative
Ceanothus leucodermisCHAPARRAL WHITETHORNNative
Ceanothus maritimusMARITIME CEANOTHUSNative
Ceanothus masoniiMASON'S CEANOTHUSNative
Ceanothus megacarpusNative
Ceanothus megacarpus var. insularisISLAND CEANOTHUSNative
Ceanothus megacarpus var. megacarpusBIGPOD CEANOTHUSNative
Ceanothus megacarpus var. pendulus
(Under Ceanothus megacarpus var. megacarpus)
Synonym
Ceanothus oliganthusNative
Ceanothus oliganthus var. oliganthusNative
Ceanothus oliganthus var. orcuttiiNative
Ceanothus oliganthus var. sorediatusJIM BRUSHNative
Ceanothus ophiochilusVAIL LAKE CEANOTHUSNative
Ceanothus otayensisOTAY MOUNTAIN CEANOTHUSNative
Ceanothus palmeriPALMER CEANOTHUSNative
Ceanothus papillosusWARTLEAF CEANOTHUSNative
Ceanothus parryiNative
Ceanothus parvifoliusNative
Ceanothus pauciflorusMOJAVE CEANOTHUSNative
Ceanothus pendletonensisCAMP PENDLETON CEANOTHUSNative
Ceanothus perplexansNative
Ceanothus pinetorumKERN CEANOTHUSNative
Ceanothus prostratusNative
Ceanothus prostratus var. laxus
(Under Ceanothus prostratus var. prostratus)
Synonym
Ceanothus prostratus var. occidentalisNative
Ceanothus prostratus var. profugus
(Under Ceanothus pumilus)
Synonym
Ceanothus prostratus var. prostratusMAHALA MATNative
Ceanothus pumilusSISKIYOU MATNative
Ceanothus purpureusHOLLY-LEAVED CEANOTHUSNative
Ceanothus ramulosus var. fascicularis
(Under Ceanothus cuneatus var. fascicularis)
Synonym
Ceanothus rigidusNative
Ceanothus roderickiiPINE HILL CEANOTHUSNative
Ceanothus sanguineusREDSTEM CEANOTHUSNative
Ceanothus sonomensisSONOMA CEANOTHUSNative
Ceanothus sorediatus
(Under Ceanothus oliganthus var. sorediatus)
Synonym
Ceanothus spinosusGREENBARK CEANOTHUSNative
Ceanothus thyrsiflorusNative
Ceanothus thyrsiflorus var. chandleri
(Under Ceanothus thyrsiflorus var. thyrsiflorus)
Synonym
Ceanothus thyrsiflorus var. griseusCARMEL CEANOTHUSNative
Ceanothus thyrsiflorus var. obispoensisHOLLISTER PEAK CEANOTHUSNative
Ceanothus thyrsiflorus var. repens
(Under Ceanothus thyrsiflorus var. thyrsiflorus)
Synonym
Ceanothus thyrsiflorus var. thyrsiflorusBLUE BLOSSOMNative
Ceanothus tomentosusNative
Ceanothus tomentosus var. olivaceus
(Under Ceanothus tomentosus)
Synonym
Ceanothus tomentosus var. tomentosus
(Under Ceanothus tomentosus)
Synonym
Ceanothus velutinussnowbrushNative
Ceanothus velutinus var. hookeri
(Under Ceanothus velutinus)
Superfluous name
Ceanothus velutinus var. laevigatus
(Under Ceanothus velutinus)
Synonym
Ceanothus velutinus var. velutinus
(Under Ceanothus velutinus)
Synonym
Ceanothus verrucosusWART-STEMMED CEANOTHUSNative
Ceanothus vestitus
(Under Ceanothus pauciflorus)
Synonym
Celastraceae
  ↳  Key to Celastraceae
STAFF-TREE FAMILY
Celtis
  ↳  Key to Celtis
HACKBERRY
Celtis australisNETTLE-TREENaturalized
Celtis reticulataNETLEAF HACKBERRYNative
Celtis sinensisCHINESE HACKBERRYNaturalized
Cenchrus
  ↳  Key to Cenchrus
SANDBUR
Cenchrus ciliaris
(Under Pennisetum ciliare)
Synonym
Cenchrus echinatusSOUTHERN SANDBURNaturalized
Cenchrus longispinusMAT SANDBURNaturalized
Cenchrus pauciflorus
(Under Cenchrus spinifex)
Synonym
Cenchrus spinifexCOASTAL SANDBUR, COMMON SANDBURNaturalized
Centaurea
  ↳  Key to Centaurea
KNAPWEED, STAR-THISTLE
Centaurea ×moncktonii
(Under Centaurea jacea nothosubsp. pratensis)
Synonym
Centaurea ×pouzinii
(Under Centaurea pouzinii)
Synonym
Centaurea ×pratensis
(Under Centaurea jacea nothosubsp. pratensis)
Illegitimate name
Centaurea australis
(Under Centaurea stoebe subsp. australis)
Synonym
Centaurea benedictaBLESSED THISTLENaturalized
Centaurea biebersteinii subsp. australis
(Under Centaurea stoebe subsp. australis)
Synonym
Centaurea calcitrapaPURPLE STAR-THISTLENaturalized
Centaurea cinerariaDUSTY MILLERNaturalized
Centaurea cyanusBACHELOR'S BUTTON, CORNFLOWERNaturalized
Centaurea diffusaDIFFUSE KNAPWEEDNaturalized
Centaurea dilutaNORTH AFRICAN KNAPWEEDNaturalized
Centaurea ibericaIBERIAN STAR-THISTLENaturalized
Centaurea jaceaNaturalized
Centaurea jacea nothosubsp. pratensisNaturalized
Centaurea jacea subsp. jaceaBROWN KNAPWEEDNaturalized
Centaurea jacea subsp. nigraBLACK KNAPWEEDNaturalized
Centaurea maculosa
(Under Centaurea stoebe subsp. australis)
Synonym
Centaurea maculosa subsp. biebersteinii
(Under Centaurea stoebe subsp. australis)
Synonym
Centaurea melitensisTOCALOTE; MALTESE STAR-THISTLENaturalized
Centaurea muricata
(Under Volutaria muricata)
Synonym
Centaurea nigra
(Under Centaurea jacea subsp. nigra)
Synonym
Centaurea pouziniiPOUZIN'S STAR-THISTLENaturalized
Centaurea repens
(Under Rhaponticum repens)
Synonym
Centaurea solstitialisYELLOW STAR-THISTLENaturalized
Centaurea squarrosa
(Under Centaurea virgata subsp. squarrosa)
Illegitimate name
Centaurea stoebe subsp. australisSPOTTED KNAPWEEDNaturalized
Centaurea stoebe subsp. micranthos
(Under Centaurea stoebe subsp. australis)
Synonym
Centaurea sublanata subsp. australis
(Under Centaurea stoebe subsp. australis)
Synonym
Centaurea sulphureaSICILIAN STAR-THISTLENaturalized
Centaurea virgata subsp. squarrosaNaturalized
Centaurium
  ↳  Key to Centaurium
CENTAURY
Centaurium arizonicum
(Under Zeltnera arizonica)
Synonym
Centaurium curvistamineum
(Under Zeltnera muehlenbergii)
Synonym
Centaurium davyi
(Under Zeltnera davyi)
Synonym
Centaurium erythraeaEUROPEAN CENTAURYNaturalized
Centaurium exaltatum
(Under Zeltnera exaltata)
Synonym
Centaurium exaltatum
(Under Zeltnera namophila)
Misapplied name
Centaurium exaltatum var. davyi
(Under Zeltnera davyi)
Synonym
Centaurium floribundum
(Under Centaurium tenuiflorum)
Misapplied name
Centaurium floribundum
(Under Zeltnera muehlenbergii)
Synonym
Centaurium muehlenbergii
(Under Centaurium tenuiflorum)
Misapplied name
Centaurium muehlenbergii
(Under Zeltnera davyi)
Misapplied name
Centaurium muehlenbergii
(Under Zeltnera muehlenbergii)
Synonym
Centaurium namophilum
(Under Zeltnera namophila)
Synonym
Centaurium pulchellumLESSER CENTAURYWaif
Centaurium tenuiflorumSLENDER CENTAURYNaturalized
Centaurium trichanthum
(Under Zeltnera trichantha)
Synonym
Centaurium venustum
(Under Zeltnera venusta)
Synonym
Centaurium venustum subsp. abramsii
(Under Zeltnera venusta)
Synonym
Centranthus
Centranthus ruberRED VALERIANNaturalized
Centromadia
  ↳  Key to Centromadia
SPIKEWEED
Centromadia fitchiiNative
Centromadia parryiNative
Centromadia parryi subsp. australisSOUTHERN TARPLANTNative
Centromadia parryi subsp. congdoniiCONGDON'S TARPLANTNative
Centromadia parryi subsp. parryiPAPPOSE TARPLANTNative
Centromadia parryi subsp. rudisPARRY'S ROUGH TARPLANTNative
Centromadia pungensNative
Centromadia pungens subsp. laevisSMOOTH TARPLANTNative
Centromadia pungens subsp. maritima
(Under Centromadia pungens subsp. pungens)
Synonym
Centromadia pungens subsp. pungensCOMMON SPIKEWEEDNative
Centromadia pungens subsp. septentrionalis
(Under Centromadia pungens subsp. pungens)
Synonym
Centrostegia
Centrostegia insignis
(Under Aristocapsa insignis)
Synonym
Centrostegia leptoceras
(Under Dodecahema leptoceras)
Synonym
Centrostegia thurberiRED TRIANGLESNative
Centrostegia thurberi var. macrotheca
(Under Centrostegia thurberi)
Synonym
Centrostegia vortriedei
(Under Systenotheca vortriedei)
Synonym
Centunculus minimus
(Under Lysimachia minima)
Synonym
Cephalanthera
Cephalanthera austiniaePHANTOM ORCHIDNative
CephalanthusBUTTON BUSH
Cephalanthus occidentalisCALIFORNIA BUTTON WILLOWNative
Cephalophora decurrens
(Under Helenium puberulum)
Synonym
Cerastium
  ↳  Key to Cerastium
Cerastium arvense subsp. maximum
(Under Cerastium viride)
Synonym
Cerastium arvense subsp. strictumFIELD MOUSE-EAR CHICKWEEDNative
Cerastium arvense var. maximum
(Under Cerastium viride)
Synonym
Cerastium arvense var. strictum
(Under Cerastium arvense subsp. strictum)
Synonym
Cerastium beeringianumBERING MOUSE-EAR CHICKWEEDNative
Cerastium beeringianum subsp. earlei
(Under Cerastium beeringianum)
Synonym
Cerastium beeringianum var. capillare
(Under Cerastium beeringianum)
Synonym
Cerastium dichotomumFORKED MOUSE-EAR CHICKWEEDNaturalized
Cerastium diffusumDARK GREEN MOUSE-EAR CHICKWEEDWaif
Cerastium fontanum subsp. triviale
(Under Cerastium fontanum subsp. vulgare)
Synonym
Cerastium fontanum subsp. vulgareCOMMON MOUSE-EAR CHICKWEEDNaturalized
Cerastium glomeratumSTICKY MOUSE-EAR CHICKWEEDNaturalized
Cerastium tetrandrum
(Under Cerastium diffusum)
Synonym
Cerastium virideWESTERN FIELD MOUSE-EAR CHICKWEEDNative
Ceratocephala testiculata
(Under Ranunculus testiculatus)
Synonym
Ceratocephalus testiculatus
(Under Ranunculus testiculatus)
Orthographic variant
Ceratoides lanata
(Under Krascheninnikovia lanata)
Synonym
CeratophyllaceaeHORNWORT FAMILY
CeratophyllumHORNWORT
Ceratophyllum apiculatum
(Under Ceratophyllum demersum)
Synonym
Ceratophyllum demersumNative
Cercidium floridum
(Under Parkinsonia florida)
Synonym
Cercidium floridum subsp. floridum
(Under Parkinsonia florida)
Synonym
Cercidium microphyllum
(Under Parkinsonia microphylla)
Synonym
CercisREDBUD
Cercis canadensis var. orbiculata
(Under Cercis occidentalis)
Synonym
Cercis occidentalisWESTERN REDBUDNative
Cercis orbiculata
(Under Cercis occidentalis)
Synonym
Cercocarpus
  ↳  Key to Cercocarpus
MOUNTAIN-MAHOGANY
Cercocarpus betuloidesNative
Cercocarpus betuloides subsp. blancheae
(Under Cercocarpus betuloides var. blancheae)
Synonym
Cercocarpus betuloides var. betuloidesBIRCH-LEAF MOUNTAIN-MAHOGANYNative
Cercocarpus betuloides var. blancheaeISLAND MOUNTAIN-MAHOGANYNative
Cercocarpus betuloides var. macrourusNative
Cercocarpus betuloides var. traskiae
(Under Cercocarpus traskiae)
Synonym
Cercocarpus intricatus
(Under Cercocarpus ledifolius var. intricatus)
Synonym
Cercocarpus ledifoliusCURL-LEAF MOUNTAIN-MAHOGANYNative
Cercocarpus ledifolius var. intermontanusNative
Cercocarpus ledifolius var. intricatusNative
Cercocarpus ledifolius var. ledifoliusNative
Cercocarpus macrourus
(Under Cercocarpus betuloides var. macrourus)
Synonym
Cercocarpus minutiflorusNative
Cercocarpus montanus var. minutiflorus
(Under Cercocarpus minutiflorus)
Synonym
Cercocarpus traskiaeCATALINA ISLAND MOUNTAIN-MAHOGANYNative
Cereus emoryi
(Under Bergerocactus emoryi)
Synonym
Cereus giganteus
(Under Carnegiea gigantea)
Synonym
Cestrum
  ↳  Key to Cestrum
Cestrum elegansWaif
Cestrum fasciculatum
(Under Cestrum elegans)
Misapplied name
Cestrum nocturnumNaturalized
Cestrum parquiWaif
Chaenactis
  ↳  Key to Chaenactis
PINCUSHION, DUSTY-MAIDENS
Chaenactis alpigenaSHARSMITH PINCUSHIONNative
Chaenactis artemisiifoliaWHITE PINCUSHIONNative
Chaenactis carphocliniaPEBBLE PINCUSHIONNative
Chaenactis carphoclinia var. carphocliniaNative
Chaenactis carphoclinia var. peirsoniiPEIRSON'S PINCUSHIONNative
Chaenactis douglasiiNative
Chaenactis douglasii var. alpinaALPINE DUSTY-MAIDENSNative
Chaenactis douglasii var. douglasiiDUSTY-MAIDENS; FALSE YARROWNative
Chaenactis douglasii var. rubricaulis
(Under Chaenactis douglasii var. douglasii)
Synonym
Chaenactis fremontiiFREMONT PINCUSHIONNative
Chaenactis gillespiei
(Under Chaenactis stevioides)
Synonym
Chaenactis glabriusculaYELLOW PINCUSHIONNative
Chaenactis glabriuscula var. glabriusculaNative
Chaenactis glabriuscula var. heterocarphaINNER COAST RANGE PINCUSHIONNative
Chaenactis glabriuscula var. lanosaSAND BUTTONSNative
Chaenactis glabriuscula var. megacephalaNative
Chaenactis glabriuscula var. orcuttianaORCUTT'S PINCUSHIONNative
Chaenactis macranthaMOJAVE PINCUSHIONNative
Chaenactis nevadensisSIERRA PINCUSHIONNative
Chaenactis parishiiPARISH'S CHAENACTISNative
Chaenactis peirsonii
(Under Chaenactis carphoclinia var. peirsonii)
Synonym
Chaenactis pumila
(Under Chaenactis douglasii var. douglasii)
Synonym
Chaenactis rubricaulis
(Under Chaenactis douglasii var. douglasii)
Synonym
Chaenactis santolinoidesSANTOLINA PINCUSHIONNative
Chaenactis stevioidesDESERT PINCUSHIONNative
Chaenactis stevioides var. thornberi
(Under Chaenactis stevioides)
Synonym
Chaenactis suffrutescensSHASTA CHAENACTIS; SHASTA PINCUSHIONNative
Chaenactis tanacetifolia
(Under Chaenactis glabriuscula var. heterocarpha)
Synonym
Chaenactis tenuifolia var. orcuttiana
(Under Chaenactis glabriuscula var. orcuttiana)
Synonym
Chaenactis xantianaFLESHY PINCUSHIONNative
Chaetadelpha
Chaetadelpha wheeleriWHEELER'S DUNE-BROOMNative
Chaetopappa
Chaetopappa alsinoides
(Under Pentachaeta alsinoides)
Synonym
Chaetopappa bellidiflora
(Under Pentachaeta bellidiflora)
Synonym
Chaetopappa ericoidesROSE-HEATHNative
Chaetopappa fragilis
(Under Pentachaeta fragilis)
Synonym
Chaetopappa lyonii
(Under Pentachaeta lyonii)
Synonym
Chamaebatia
  ↳  Key to Chamaebatia
Chamaebatia australisSOUTHERN MOUNTAIN MISERYNative
Chamaebatia foliolosaMOUNTAIN MISERYNative
Chamaebatiaria
Chamaebatiaria millefoliumNative
ChamaecyparisFALSE CYPRESS
Chamaecyparis lawsonianaPORT ORFORD CEDAR, LAWSON CYPRESSNative
Chamaecyparis nootkatensis
(Under Callitropsis nootkatensis)
Synonym
Chamaecytisus proliferus
(Under Cytisus proliferus)
Synonym
Chamaemelum
Chamaemelum arvense
(Under Anthemis arvensis)
Synonym
Chamaemelum cotula
(Under Anthemis cotula)
Synonym
Chamaemelum foetidum
(Under Anthemis cotula)
Synonym
Chamaemelum fuscatumCHAMOMILENaturalized
Chamaesaracha
  ↳  Key to Chamaesaracha
Chamaesaracha coronopusNative
Chamaesaracha nanaNative
Chamaesyce abramsiana
(Under Euphorbia abramsiana)
Synonym
Chamaesyce albomarginata
(Under Euphorbia albomarginata)
Synonym
Chamaesyce arizonica
(Under Euphorbia arizonica)
Synonym
Chamaesyce fendleri
(Under Euphorbia fendleri)
Synonym
Chamaesyce glyptosperma
(Under Euphorbia glyptosperma)
Synonym
Chamaesyce hooveri
(Under Euphorbia hooveri)
Synonym
Chamaesyce maculata
(Under Euphorbia maculata)
Synonym
Chamaesyce melanadenia
(Under Euphorbia melanadenia)
Synonym
Chamaesyce micromera
(Under Euphorbia micromera)
Synonym
Chamaesyce nutans
(Under Euphorbia nutans)
Synonym
Chamaesyce ocellata
(Under Euphorbia ocellata)
Synonym
Chamaesyce ocellata subsp. arenicola
(Under Euphorbia ocellata subsp. arenicola)
Synonym
Chamaesyce ocellata subsp. ocellata
(Under Euphorbia ocellata subsp. ocellata)
Synonym
Chamaesyce ocellata subsp. rattanii
(Under Euphorbia ocellata subsp. rattanii)
Synonym
Chamaesyce parishii
(Under Euphorbia parishii)
Synonym
Chamaesyce parryi
(Under Euphorbia parryi)
Synonym
Chamaesyce pediculifera
(Under Euphorbia pediculifera)
Synonym
Chamaesyce platysperma
(Under Euphorbia platysperma)
Synonym
Chamaesyce polycarpa
(Under Euphorbia polycarpa)
Synonym
Chamaesyce prostrata
(Under Euphorbia prostrata)
Synonym
Chamaesyce revoluta
(Under Euphorbia revoluta)
Synonym
Chamaesyce serpens
(Under Euphorbia serpens)
Synonym
Chamaesyce serpyllifolia
(Under Euphorbia serpillifolia)
Synonym
Chamaesyce serpyllifolia subsp. hirtula
(Under Euphorbia serpillifolia subsp. hirtula)
Synonym
Chamaesyce serpyllifolia subsp. serpyllifolia
(Under Euphorbia serpillifolia subsp. serpillifolia)
Synonym
Chamaesyce setiloba
(Under Euphorbia setiloba)
Synonym
Chamaesyce vallis-mortae
(Under Euphorbia vallis-mortae)
Synonym
Chamelaucium
Chamelaucium uncinatumWAXFLOWERWaif
Chamerion
  ↳  Key to Chamerion
Chamerion angustifolium subsp. circumvagumFIREWEEDNative
Chamerion latifoliumNative
Chamomilla occidentalis
(Under Matricaria occidentalis)
Synonym
Chamomilla suaveolens
(Under Matricaria discoidea)
Synonym
Chasmanthe
Chasmanthe floribundaNaturalized
Cheilanthes carlotta-halliae
(Under Aspidotis carlotta-halliae)
Synonym
Cheilanthes clevelandii
(Under Myriopteris clevelandii)
Synonym
Cheilanthes cochisensis
(Under Astrolepis cochisensis)
Synonym
Cheilanthes cooperae
(Under Myriopteris cooperae)
Synonym
Cheilanthes covillei
(Under Myriopteris covillei)
Synonym
Cheilanthes feei
(Under Myriopteris gracilis)
Synonym
Cheilanthes gracillima
(Under Myriopteris gracillima)
Synonym
Cheilanthes intertexta
(Under Myriopteris intertexta)
Synonym
Cheilanthes jonesii
(Under Argyrochosma jonesii)
Synonym
Cheilanthes limitanea var. limitanea
(Under Argyrochosma limitanea subsp. limitanea)
Synonym
Cheilanthes newberryi
(Under Myriopteris newberryi)
Synonym
Cheilanthes parryi
(Under Myriopteris parryi)
Synonym
Cheilanthes sinuata var. cochisensis
(Under Astrolepis cochisensis)
Synonym
Cheilanthes viscida
(Under Myriopteris viscida)
Synonym
Cheilanthes wootonii
(Under Myriopteris wootonii)
Synonym
Chelone nemorosa
(Under Nothochelone nemorosa)
Synonym
Chenopodiaceae
  ↳  Key to Chenopodiaceae
GOOSEFOOT FAMILY
Chenopodium
  ↳  Key to Chenopodium
PIGWEED, GOOSEFOOT
Chenopodium albumLAMB'S QUARTERSNaturalized
Chenopodium album var. missouriense
(Under Chenopodium missouriense)
Synonym
Chenopodium ambrosioides
(Under Dysphania ambrosioides)
Synonym
Chenopodium ambrosioides var. anthelminticum
(Under Dysphania anthelmintica)
Synonym
Chenopodium ambrosioides var. suffruticosum
(Under Dysphania ambrosioides)
Synonym
Chenopodium ambrosioides var. vagans
(Under Dysphania chilensis)
Synonym
Chenopodium anthelminticum
(Under Dysphania anthelmintica)
Synonym
Chenopodium atrovirensNative
Chenopodium berlandieriPITSEED GOOSEFOOTNative
Chenopodium berlandieri var. sinuatumNative
Chenopodium berlandieri var. zschackeiNative
Chenopodium botrys
(Under Dysphania botrys)
Synonym
Chenopodium californicumCALIFORNIA GOOSEFOOTNative
Chenopodium capitatumSTRAWBERRY-BLITENative
Chenopodium capitatum var. capitatumNaturalized
Chenopodium capitatum var. parvicapitatumNative
Chenopodium carnosulum var. patagonicum
(Under Chenopodium littoreum)
Misapplied name
Chenopodium chenopodioidesNaturalized
Chenopodium desiccatumNative
Chenopodium desiccatum var. leptophylloides
(Under Chenopodium pratericola)
Synonym
Chenopodium foliosumNaturalized
Chenopodium fremontiiNative
Chenopodium fremontii var. incanum
(Under Chenopodium incanum var. occidentale)
Synonym
Chenopodium gigantospermum
(Under Chenopodium simplex)
Synonym
Chenopodium glaucum var. salinumNative
Chenopodium hiansNative
Chenopodium incanum var. occidentaleNative
Chenopodium incognitum
(Under Chenopodium hians)
Synonym
Chenopodium leptophyllumNative
Chenopodium littoreumNative
Chenopodium macrospermumNaturalized
Chenopodium macrospermum var. farinosum
(Under Chenopodium macrospermum)
Synonym
Chenopodium macrospermum var. halophilum
(Under Chenopodium macrospermum)
Synonym
Chenopodium missourienseNaturalized
Chenopodium multifidum
(Under Dysphania multifida)
Synonym
Chenopodium muraleNaturalized
Chenopodium nevadenseNative
Chenopodium overi
(Under Chenopodium capitatum var. parvicapitatum)
Synonym
Chenopodium overi
(Under Chenopodium foliosum)
Synonym
Chenopodium polyspermum var. acutifoliumWaif
Chenopodium pratericolaNative
Chenopodium pumilio
(Under Dysphania pumilio)
Synonym
Chenopodium rubrumRED PIGWEEDNative
Chenopodium rubrum var. humileNative
Chenopodium rubrum var. rubrumNaturalized
Chenopodium salinum
(Under Chenopodium glaucum var. salinum)
Synonym
Chenopodium simplexLARGE-SEEDED GOOSEFOOTNative
Chenopodium spinosum
(Under Grayia spinosa)
Synonym
Chenopodium strictum var. glaucophyllumNaturalized
Chenopodium subspicatum
(Under Atriplex dioica)
Synonym
Chenopodium vulvariaNaturalized
Chenopodium watsoniiNative
Cherleria
Cherleria bifloraMOUNTAIN SANDWORTNative
Chilianthus oleaceus
(Under Buddleja saligna)
Synonym
ChilopsisDESERT-WILLOW
Chilopsis linearis subsp. arcuataNative
Chimaphila
  ↳  Key to Chimaphila
PRINCE'S PINE, PIPSISSEWA
Chimaphila menziesiiLITTLE PRINCE'S PINENative
Chimaphila umbellataPRINCE'S PINENative
Chimaphila umbellata var. occidentalis
(Under Chimaphila umbellata)
Synonym
ChloracanthaSPINY ASTER
Chloracantha spinosa var. spinosaNative
Chloris
  ↳  Key to Chloris
Chloris gayanaRHODES GRASSNaturalized
Chloris truncataBLACK WINDMILL GRASSNaturalized
Chloris verticillataWINDMILL GRASSNaturalized
Chloris virgataFEATHER FINGER GRASSNaturalized
Chlorogalum
  ↳  Key to Chlorogalum
SOAP PLANT, SOAPROOT
Chlorogalum angustifoliumNARROW-LEAVED SOAP PLANTNative
Chlorogalum grandiflorumRED HILLS SOAPROOTNative
Chlorogalum parviflorum
(Under Hooveria parviflora)
Synonym
Chlorogalum pomeridianumNative
Chlorogalum pomeridianum var. divaricatumCOASTAL SOAP PLANTNative
Chlorogalum pomeridianum var. minusDWARF SOAPROOTNative
Chlorogalum pomeridianum var. pomeridianumCOMMON SOAP PLANTNative
Chlorogalum purpureum
(Under Hooveria purpurea)
Synonym
Chlorogalum purpureum var. purpureum
(Under Hooveria purpurea var. purpurea)
Synonym
Chlorogalum purpureum var. reductum
(Under Hooveria purpurea var. reducta)
Synonym
Chloropyron
  ↳  Key to Chloropyron
SALTY BIRD'S-BEAK
Chloropyron maritimumNative
Chloropyron maritimum subsp. canescensNative
Chloropyron maritimum subsp. maritimumSALT MARSH BIRD'S-BEAKNative
Chloropyron maritimum subsp. palustrePOINT REYES SALTY BIRD'S-BEAKNative
Chloropyron molleNative
Chloropyron molle subsp. hispidumHISPID SALTY BIRD'S-BEAKNative
Chloropyron molle subsp. molleSOFT SALTY BIRD'S-BEAKNative
Chloropyron palmatumPALMATE SALTY BIRD'S-BEAKNative
Chloropyron tecopenseTECOPA SALTY BIRD'S-BEAKNative
Chondrilla
Chondrilla junceaSKELETON WEEDNaturalized
Chorisiva nevadensis
(Under Euphrosyne nevadensis)
Synonym
Chorispora
Chorispora tenellaNaturalized
Chorizanthe
  ↳  Key to Chorizanthe
SPINEFLOWER
Chorizanthe andersonii
(Under Chorizanthe diffusa)
Synonym
Chorizanthe angustifoliaNARROW-LEAF SPINEFLOWERNative
Chorizanthe angustifolia var. eastwoodiae
(Under Chorizanthe eastwoodiae)
Synonym
Chorizanthe aphananthaIRISH HILLS SPINEFLOWERNative
Chorizanthe bilobaNative
Chorizanthe biloba var. bilobaTWO-LOBE SPINEFLOWERNative
Chorizanthe biloba var. immemoraHERNANDEZ SPINEFLOWERNative
Chorizanthe blakleyiBLAKLEY'S SPINEFLOWERNative
Chorizanthe brevicornuNative
Chorizanthe brevicornu var. brevicornuBRITTLE SPINEFLOWERNative
Chorizanthe brevicornu var. spathulataGREAT BASIN BRITTLE SPINEFLOWERNative
Chorizanthe breweriBREWER'S SPINEFLOWERNative
Chorizanthe californica
(Under Mucronea californica)
Synonym
Chorizanthe californica var. suksdorfii
(Under Mucronea californica)
Synonym
Chorizanthe chaetophora
(Under Chorizanthe procumbens)
Synonym
Chorizanthe chrysacantha
(Under Chorizanthe staticoides)
Synonym
Chorizanthe chrysacantha var. compacta
(Under Chorizanthe staticoides)
Synonym
Chorizanthe clevelandiiCLEVELAND'S SPINEFLOWERNative
Chorizanthe coriacea
(Under Lastarriaea coriacea)
Synonym
Chorizanthe corrugataWRINKLED SPINEFLOWERNative
Chorizanthe cuspidataNative
Chorizanthe cuspidata var. cuspidataSAN FRANCISCO BAY SPINEFLOWERNative
Chorizanthe cuspidata var. marginata
(Under Chorizanthe cuspidata var. cuspidata)
Synonym
Chorizanthe cuspidata var. villosaWOOLLY-HEADED SPINEFLOWERNative
Chorizanthe diffusaDIFFUSE SPINEFLOWERNative
Chorizanthe discolor
(Under Chorizanthe staticoides)
Synonym
Chorizanthe douglasiiDOUGLAS' SPINEFLOWERNative
Chorizanthe douglasii var. albens
(Under Chorizanthe pungens var. pungens)
Synonym
Chorizanthe douglasii var. hartwegii
(Under Chorizanthe robusta var. hartwegii)
Synonym
Chorizanthe eastwoodiaeEASTWOOD'S SPINEFLOWERNative
Chorizanthe fernandina
(Under Chorizanthe parryi var. fernandina)
Synonym
Chorizanthe fimbriataNative
Chorizanthe fimbriata var. fimbriataFRINGED SPINEFLOWERNative
Chorizanthe fimbriata var. laciniataLACINIATE SPINEFLOWERNative
Chorizanthe floccosa
(Under Hollisteria lanata)
Synonym
Chorizanthe howelliiHOWELL'S SPINEFLOWERNative
Chorizanthe insignis
(Under Aristocapsa insignis)
Synonym
Chorizanthe insularis
(Under Chorizanthe wheeleri)
Synonym
Chorizanthe jonesiana
(Under Chorizanthe procumbens)
Synonym
Chorizanthe laciniata
(Under Chorizanthe fimbriata var. laciniata)
Synonym
Chorizanthe lastarriaea var. californica
(Under Lastarriaea coriacea)
Synonym
Chorizanthe leptoceras
(Under Dodecahema leptoceras)
Synonym
Chorizanthe leptothecaPENINSULAR SPINEFLOWERNative
Chorizanthe membranaceaPINK SPINEFLOWERNative
Chorizanthe minutifloraFORT ORD SPINEFLOWERNative
Chorizanthe nortonii
(Under Chorizanthe douglasii)
Synonym
Chorizanthe nudicaulis
(Under Chorizanthe procumbens)
Synonym
Chorizanthe obovataSPOON-SEPAL SPINEFLOWERNative
Chorizanthe obovata f. prostrata
(Under Chorizanthe obovata)
Synonym
Chorizanthe orcuttianaORCUTT'S SPINEFLOWERNative
Chorizanthe palmeriPALMER'S SPINEFLOWERNative
Chorizanthe palmeri var. biloba
(Under Chorizanthe biloba var. biloba)
Synonym
Chorizanthe palmeri var. ventricosa
(Under Chorizanthe ventricosa)
Synonym
Chorizanthe parryiNative
Chorizanthe parryi var. fernandinaSAN FERNANDO VALLEY SPINEFLOWERNative
Chorizanthe parryi var. parryiPARRY'S SPINEFLOWERNative
Chorizanthe perfoliata
(Under Mucronea perfoliata)
Synonym
Chorizanthe polygonoidesNative
Chorizanthe polygonoides subsp. longispina
(Under Chorizanthe polygonoides var. longispina)
Synonym
Chorizanthe polygonoides var. longispinaLONG-SPINED SPINEFLOWERNative
Chorizanthe polygonoides var. polygonoidesKNOTWEED SPINEFLOWERNative
Chorizanthe procumbensPROSTRATE SPINEFLOWERNative
Chorizanthe procumbens var. albiflora
(Under Chorizanthe procumbens)
Synonym
Chorizanthe procumbens var. mexicana
(Under Chorizanthe procumbens)
Synonym
Chorizanthe pungensNative
Chorizanthe pungens var. cuspidata
(Under Chorizanthe cuspidata var. cuspidata)
Synonym
Chorizanthe pungens var. diffusa
(Under Chorizanthe diffusa)
Synonym
Chorizanthe pungens var. hartwegianaBEN LOMOND SPINEFLOWERNative
Chorizanthe pungens var. hartwegii
(Under Chorizanthe pungens var. hartwegiana)
Synonym
Chorizanthe pungens var. hartwegii
(Under Chorizanthe robusta var. hartwegii)
Synonym
Chorizanthe pungens var. pungensMONTEREY SPINEFLOWERNative
Chorizanthe pungens var. robusta
(Under Chorizanthe robusta var. robusta)
Synonym
Chorizanthe rectispinaSTRAIGHT-AWNED SPINEFLOWERNative
Chorizanthe rigidaDEVIL'S SPINEFLOWERNative
Chorizanthe robustaNative
Chorizanthe robusta var. hartwegiiSCOTTS VALLEY SPINEFLOWERNative
Chorizanthe robusta var. robustaROBUST SPINEFLOWERNative
Chorizanthe spathulata
(Under Chorizanthe brevicornu var. spathulata)
Synonym
Chorizanthe spinosaMOJAVE SPINEFLOWERNative
Chorizanthe staticoidesTURKISH RUGGINGNative
Chorizanthe staticoides f. bracteata
(Under Chorizanthe staticoides)
Synonym
Chorizanthe staticoides subsp. chrysacantha
(Under Chorizanthe staticoides)
Synonym
Chorizanthe staticoides var. brevispina
(Under Chorizanthe staticoides)
Synonym
Chorizanthe staticoides var. elata
(Under Chorizanthe staticoides)
Synonym
Chorizanthe staticoides var. latiloba
(Under Chorizanthe staticoides)
Synonym
Chorizanthe staticoides var. nudicaulis
(Under Chorizanthe procumbens)
Synonym
Chorizanthe stellulataSTARLITE SPINEFLOWERNative
Chorizanthe thurberi
(Under Centrostegia thurberi)
Synonym
Chorizanthe thurberi var. cryptantha
(Under Centrostegia thurberi)
Synonym
Chorizanthe thurberi var. macrotheca
(Under Centrostegia thurberi)
Synonym
Chorizanthe uncinata
(Under Chorizanthe procumbens)
Synonym
Chorizanthe uniaristataONE-AWN SPINEFLOWERNative
Chorizanthe validaSONOMA SPINEFLOWERNative
Chorizanthe ventricosaPOTBELLIED SPINEFLOWERNative
Chorizanthe villosa
(Under Chorizanthe cuspidata var. villosa)
Synonym
Chorizanthe vortriedei
(Under Systenotheca vortriedei)
Synonym
Chorizanthe watsoniiWATSON'S SPINEFLOWERNative
Chorizanthe wheeleriWHEELER'S SPINEFLOWERNative
Chorizanthe xantiNative
Chorizanthe xanti subsp. leucotheca
(Under Chorizanthe xanti var. leucotheca)
Synonym
Chorizanthe xanti var. leucothecaWHITE-BRACTED SPINEFLOWERNative
Chorizanthe xanti var. xantiPINYON SPINEFLOWERNative
Chrysamphora californica
(Under Darlingtonia californica)
Synonym
Chrysanthemoides
Chrysanthemoides monilifera subsp. moniliferaBITOU BUSHNaturalized
Chrysanthemum coronarium
(Under Glebionis coronaria)
Synonym
Chrysanthemum foeniculaceum
(Under Argyranthemum foeniculaceum)
Synonym
Chrysanthemum leucanthemum
(Under Leucanthemum vulgare)
Synonym
Chrysanthemum maximum
(Under Leucanthemum maximum)
Synonym
Chrysanthemum parthenium
(Under Tanacetum parthenium)
Synonym
Chrysanthemum segetum
(Under Glebionis segetum)
Synonym
Chrysolepis
  ↳  Key to Chrysolepis
CHINQUAPIN
Chrysolepis chrysophyllaGIANT CHINQUAPINNative
Chrysolepis chrysophylla var. chrysophyllaNative
Chrysolepis chrysophylla var. minorNative
Chrysolepis sempervirensBUSH CHINQUAPINNative
Chrysopsis breweri
(Under Doellingeria breweri)
Synonym
Chrysopsis villosa var. villosa
(Under Heterotheca villosa var. minor)
Misapplied name
Chrysopsis villosa var. villosa
(Under Heterotheca villosa var. minor)
Misapplied name
ChrysospleniumGOLDEN SAXIFRAGE
Chrysosplenium glechomifoliumNative
Chrysothamnus
  ↳  Key to Chrysothamnus
RABBITBRUSH
Chrysothamnus albidus
(Under Ericameria albida)
Synonym
Chrysothamnus depressusNative
Chrysothamnus gramineus
(Under Cuniculotinus gramineus)
Synonym
Chrysothamnus greeneiGREENE'S RABBITBRUSHNative
Chrysothamnus humilisNative
Chrysothamnus nauseosus
(Under Ericameria nauseosa)
Synonym
Chrysothamnus nauseosus subsp. albicaulis
(Under Ericameria nauseosa var. speciosa)
Synonym
Chrysothamnus nauseosus subsp. bernardinus
(Under Ericameria nauseosa var. bernardina)
Synonym
Chrysothamnus nauseosus subsp. ceruminosus
(Under Ericameria nauseosa var. ceruminosa)
Synonym
Chrysothamnus nauseosus subsp. consimilis
(Under Ericameria nauseosa var. oreophila)
Synonym
Chrysothamnus nauseosus subsp. gnaphalodes
(Under Ericameria nauseosa var. hololeuca)
Synonym
Chrysothamnus nauseosus subsp. hololeucus
(Under Ericameria nauseosa var. hololeuca)
Synonym
Chrysothamnus nauseosus subsp. leiospermus
(Under Ericameria nauseosa var. leiosperma)
Synonym
Chrysothamnus nauseosus subsp. mohavensis
(Under Ericameria nauseosa var. mohavensis)
Synonym
Chrysothamnus nauseosus subsp. washoensis
(Under Ericameria nauseosa var. washoensis)
Synonym
Chrysothamnus nauseosus var. viridulus
(Under Ericameria nauseosa var. oreophila)
Synonym
Chrysothamnus paniculatus
(Under Ericameria paniculata)
Synonym
Chrysothamnus parryi
(Under Ericameria parryi)
Synonym
Chrysothamnus parryi subsp. asper
(Under Ericameria parryi var. aspera)
Synonym
Chrysothamnus parryi subsp. imulus
(Under Ericameria parryi var. imula)
Synonym
Chrysothamnus parryi subsp. latior
(Under Ericameria parryi var. latior)
Synonym
Chrysothamnus parryi subsp. monocephalus
(Under Ericameria parryi var. monocephala)
Synonym
Chrysothamnus parryi subsp. nevadensis
(Under Ericameria parryi var. nevadensis)
Synonym
Chrysothamnus parryi subsp. vulcanicus
(Under Ericameria parryi var. vulcanica)
Synonym
Chrysothamnus teretifolius
(Under Ericameria teretifolia)
Synonym
Chrysothamnus viscidiflorusYELLOW RABBITBRUSHNative
Chrysothamnus viscidiflorus subsp. axillarisNative
Chrysothamnus viscidiflorus subsp. humilis
(Under Chrysothamnus humilis)
Synonym
Chrysothamnus viscidiflorus subsp. lanceolatusNative
Chrysothamnus viscidiflorus subsp. latifolius
(Under Chrysothamnus viscidiflorus subsp. viscidiflorus)
Synonym
Chrysothamnus viscidiflorus subsp. puberulusNative
Chrysothamnus viscidiflorus subsp. pumilus
(Under Chrysothamnus viscidiflorus subsp. viscidiflorus)
Synonym
Chrysothamnus viscidiflorus subsp. stenophyllus
(Under Chrysothamnus viscidiflorus subsp. viscidiflorus)
Synonym
Chrysothamnus viscidiflorus subsp. viscidiflorusNative
Chylismia
  ↳  Key to Chylismia
Chylismia arenariaNative
Chylismia brevipesNative
Chylismia brevipes subsp. arizonicaNative
Chylismia brevipes subsp. brevipesNative
Chylismia brevipes subsp. pallidulaNative
Chylismia cardiophyllaNative
Chylismia cardiophylla subsp. cardiophyllaNative
Chylismia cardiophylla subsp. robustaNative
Chylismia claviformisNative
Chylismia claviformis subsp. aurantiacaNative
Chylismia claviformis subsp. claviformisNative
Chylismia claviformis subsp. cruciformisNative
Chylismia claviformis subsp. funereaNative
Chylismia claviformis subsp. integriorNative
Chylismia claviformis subsp. lancifoliaNative
Chylismia claviformis subsp. peirsoniiNative
Chylismia claviformis subsp. yumaeNative
Chylismia heterochromaSHOCKLEY'S EVENING-PRIMROSENative
Chylismia heterochroma
(Under Chylismia heterochroma)
Superfluous name
Chylismia lancifolia
(Under Chylismia claviformis subsp. lancifolia)
Synonym
Chylismia munziiNative
Chylismia walkeri subsp. tortilisNative
Chylismiella
Chylismiella pterospermaNative
Cicendia
Cicendia quadrangularisTIMWORTNative
CichoriumCHICORY
Cichorium intybusNaturalized
Cicuta
  ↳  Key to Cicuta
WATER-HEMLOCK
Cicuta bolanderi
(Under Cicuta maculata var. bolanderi)
Synonym
Cicuta douglasiiNative
Cicuta maculataNative
Cicuta maculata var. angustifoliaNative
Cicuta maculata var. bolanderiBOLANDER'S WATER-HEMLOCKNative
Cicuta occidentalis
(Under Cicuta maculata var. angustifolia)
Synonym
Cicuta valida
(Under Cicuta maculata var. angustifolia)
Synonym
Cinna
  ↳  Key to Cinna
WOODREED
Cinna bolanderiBOLANDER'S WOODREEDNative
Cinna latifoliaDROOPING WOODREED, SLENDER WOODREEDNative
Cinnamomum
Cinnamomum camphoraCAMPHOR TREENaturalized
CircaeaENCHANTER'S NIGHTSHADE
Circaea alpina subsp. pacificaNative
Cirsium
  ↳  Key to Cirsium
THISTLE
Cirsium acanthodontum
(Under Cirsium remotifolium var. rivulare)
Synonym
Cirsium amblylepis
(Under Cirsium remotifolium var. odontolepis)
Synonym
Cirsium andersoniiNative
Cirsium andrewsiiFRANCISCAN THISTLENative
Cirsium arizonicumNative
Cirsium arizonicum var. arizonicumARIZONA THISTLENative
Cirsium arizonicum var. tenuisectumDESERT MOUNTAIN THISTLENative
Cirsium arvenseCANADA THISTLENaturalized
Cirsium brevistylumNative
Cirsium callilepis
(Under Cirsium remotifolium var. odontolepis)
Synonym
Cirsium callilepis var. pseudocarlinoides
(Under Cirsium remotifolium var. odontolepis)
Synonym
Cirsium canescensPRAIRIE THISTLENaturalized
Cirsium canovirens
(Under Cirsium cymosum var. canovirens)
Synonym, in part
Cirsium canovirens
(Under Cirsium inamoenum var. inamoenum)
Misapplied name, in part
Cirsium ciliolatumASHLAND THISTLENative
Cirsium coulteri
(Under Cirsium occidentale var. coulteri)
Synonym
Cirsium crassicauleSLOUGH THISTLENative
Cirsium cymosumNative
Cirsium cymosum var. canovirensGRAY-GREEN THISTLENative
Cirsium cymosum var. cymosumPEREGRINE THISTLENative
Cirsium douglasiiSWAMP THISTLENative
Cirsium douglasii var. breweriNative
Cirsium douglasii var. douglasiiNative
Cirsium fontinaleFOUNTAIN THISTLENative
Cirsium fontinale var. campylonMOUNT HAMILTON THISTLENative
Cirsium fontinale var. fontinaleFOUNTAIN THISTLENative
Cirsium fontinale var. obispoenseCHORRO CREEK BOG THISTLENative
Cirsium hydrophilumNative
Cirsium hydrophilum var. hydrophilumSUISUN THISTLENative
Cirsium hydrophilum var. vaseyiMOUNT TAMALPAIS THISTLENative
Cirsium inamoenum var. inamoenumGREENE'S THISTLENative
Cirsium loncholepis
(Under Cirsium scariosum var. loncholepis)
Synonym
Cirsium mendocinum
(Under Cirsium andrewsii)
Synonym
Cirsium mohavenseMOJAVE THISTLENative
Cirsium neomexicanumDESERT THISTLENative
Cirsium nidulum
(Under Cirsium arizonicum var. tenuisectum)
Misapplied name
Cirsium occidentaleNative
Cirsium occidentale var. californicumCALIFORNIA THISTLENative
Cirsium occidentale var. candidissimumSNOWY THISTLENative
Cirsium occidentale var. compactumCOMPACT COBWEBBY THISTLENative
Cirsium occidentale var. coulteriCOULTER'S THISTLENative
Cirsium occidentale var. lucianumCUESTA RIDGE THISTLENative
Cirsium occidentale var. occidentaleCOBWEBBY THISTLENative
Cirsium occidentale var. venustumVENUS THISTLENative
Cirsium ochrocentrum var. ochrocentrumYELLOWSPINE THISTLENaturalized
Cirsium praeteriensLOST THISTLENative
Cirsium quercetorumBROWNIE THISTLENative
Cirsium quercetorum var. walkerianum
(Under Cirsium quercetorum)
Synonym
Cirsium quercetorum var. xerolepis
(Under Cirsium quercetorum)
Synonym
Cirsium remotifoliumNative
Cirsium remotifolium var. odontolepisPACIFIC FRINGED THISTLENative
Cirsium remotifolium var. remotifoliumREMOTE-LEAVED THISTLENative
Cirsium remotifolium var. rivulareKLAMATH THISTLENative
Cirsium rhothophilumSURF THISTLENative
Cirsium scariosumMEADOW THISTLENative
Cirsium scariosum var. americanumDINNERPLATE THISTLENative
Cirsium scariosum var. citrinumSOUTHERN MEADOW THISTLENative
Cirsium scariosum var. citrinum
(Under Cirsium scariosum var. loncholepis)
Synonym, in part
Cirsium scariosum var. congdoniiROSETTE THISTLENative
Cirsium scariosum var. loncholepisLA GRACIOSA THISTLENative
Cirsium scariosum var. robustumSHASTA VALLEY THISTLENative
Cirsium scariosum var. scariosumELK THISTLENative
Cirsium subniveum
(Under Cirsium inamoenum var. inamoenum)
Synonym
Cirsium tioganum
(Under Cirsium scariosum var. congdonii)
Synonym
Cirsium undulatumWAVYLEAF THISTLENative
Cirsium undulatum
(Under Cirsium canescens)
Misapplied name, in part
Cirsium utahense
(Under Cirsium inamoenum var. inamoenum)
Misapplied name
Cirsium utahense
(Under Cirsium neomexicanum)
Synonym
Cirsium virginense
(Under Cirsium mohavense)
Synonym
Cirsium vulgareBULL THISTLENaturalized
Cirsium walkerianum
(Under Cirsium quercetorum)
Synonym
CissusTREEBINE
Cissus antarcticaKANGAROO IVYWaif
Cistaceae
  ↳  Key to Cistaceae
ROCK-ROSE FAMILY
Cistanthe
  ↳  Key to Cistanthe
Cistanthe ambiguaDESERT CISTANTHENative
Cistanthe maritimaSEASIDE CISTANTHENative
Cistanthe monandra
(Under Calyptridium monandrum)
Synonym
Cistanthe monosperma
(Under Calyptridium monospermum)
Synonym
Cistanthe parryi
(Under Calyptridium parryi)
Synonym
Cistanthe parryi var. arizonica
(Under Calyptridium arizonicum)
Synonym
Cistanthe parryi var. hesseae
(Under Calyptridium parryi var. hesseae)
Synonym
Cistanthe parryi var. nevadensis
(Under Calyptridium parryi var. nevadense)
Synonym
Cistanthe pulchella
(Under Calyptridium pulchellum)
Synonym
Cistanthe pygmaea
(Under Calyptridium pygmaeum)
Synonym
Cistanthe quadripetala
(Under Calyptridium quadripetalum)
Synonym
Cistanthe rosea
(Under Calyptridium roseum)
Synonym
Cistanthe umbellata
(Under Calyptridium umbellatum)
Synonym
Cistus
  ↳  Key to Cistus
ROCK-ROSE
Cistus creticus
(Under Cistus incanus)
Synonym
Cistus incanusNaturalized
Cistus incanus subsp. corsicus
(Under Cistus incanus)
Synonym
Cistus incanus subsp. creticus
(Under Cistus incanus)
Synonym
Cistus incanus subsp. incanus
(Under Cistus incanus)
Synonym
Cistus ladaniferGUM CISTUSNaturalized
Cistus monspeliensisNaturalized
Cistus psilosepalusUrban weed
Cistus salvifolius
(Under Cistus salviifolius)
Orthographic variant
Cistus salviifoliusNaturalized
Cistus villosus
(Under Cistus incanus)
Synonym
Cistus villosus var. corsicus
(Under Cistus incanus)
Synonym ined.
Cistus villosus var. tauricus
(Under Cistus incanus)
Synonym ined.
Cistus villosus var. undulatus
(Under Cistus incanus)
Synonym ined.
Citrullus
Citrullus colocynthis var. lanatus
(Under Citrullus lanatus var. citroides)
Synonym ined.
Citrullus lanatus var. citroidesWILD WATERMELONNaturalized
Citrullus vulgaris
(Under Citrullus lanatus var. citroides)
Synonym, in part
CladiumTWIG RUSH
Cladium californicumCALIFORNIA SAWGRASSNative
Cladium mariscus var. californicum
(Under Cladium californicum)
Synonym
Clarkia
  ↳  Key to Clarkia
Clarkia affinisNative
Clarkia amoenaFAREWELL-TO-SPRINGNative
Clarkia amoena subsp. amoenaNative
Clarkia amoena subsp. huntianaNative
Clarkia amoena subsp. whitneyiWHITNEY'S FAREWELL-TO-SPRINGNative
Clarkia arcuataNative
Clarkia australisSMALL'S SOUTHERN CLARKIANative
Clarkia bilobaNative
Clarkia biloba subsp. australisMARIPOSA CLARKIANative
Clarkia biloba subsp. bilobaNative
Clarkia biloba subsp. brandegeae
(Under Clarkia biloba subsp. brandegeeae)
Orthographic variant
Clarkia biloba subsp. brandegeeaeBRANDEGEE'S CLARKIANative
Clarkia borealisNative
Clarkia borealis subsp. aridaSHASTA CLARKIANative
Clarkia borealis subsp. borealisNORTHERN CLARKIANative
Clarkia bottaePUNCHBOWL GODETIANative
Clarkia bottae
(Under Clarkia lewisii)
Unabridged misapplied name
Clarkia breweriBREWER'S CLARKIANative
Clarkia calientensis
(Under Clarkia tembloriensis subsp. calientensis)
Synonym
Clarkia concinnaRED RIBBONSNative
Clarkia concinna subsp. automixaSANTA CLARA RED RIBBONSNative
Clarkia concinna subsp. concinnaNative
Clarkia concinna subsp. raicheiRAICHE'S RED RIBBONSNative
Clarkia cylindricaNative
Clarkia cylindrica subsp. clavicarpaNative
Clarkia cylindrica subsp. cylindricaNative
Clarkia davyiNative
Clarkia deflexa
(Under Clarkia bottae)
Synonym
Clarkia delicataDELICATE CLARKIANative
Clarkia dudleyanaNative
Clarkia epilobioidesNative
Clarkia exilisSLENDER CLARKIANative
Clarkia franciscanaPRESIDIO CLARKIANative
Clarkia gracilisNative
Clarkia gracilis subsp. albicaulisWHITE-STEMMED CLARKIANative
Clarkia gracilis subsp. gracilisNative
Clarkia gracilis subsp. sonomensisNative
Clarkia gracilis subsp. tracyiTRACY'S CLARKIANative
Clarkia heterandraNative
Clarkia imbricataVINE HILL CLARKIANative
Clarkia jolonensisJOLON CLARKIANative
Clarkia lassenensisNative
Clarkia lewisiiLEWIS' CLARKIANative
Clarkia lingulataMERCED CLARKIANative
Clarkia mildrediaeNative
Clarkia mildrediae subsp. lutescensGOLDEN-ANTHERED CLARKIANative
Clarkia mildrediae subsp. mildrediaeMILDRED'S CLARKIANative
Clarkia modestaNative
Clarkia mosquiniiMOSQUIN'S CLARKIANative
Clarkia mosquinii subsp. mosquinii
(Under Clarkia mosquinii)
Synonym
Clarkia mosquinii subsp. xerophila
(Under Clarkia mosquinii)
Synonym
Clarkia mosquinii subsp. xerophylla
(Under Clarkia mosquinii)
Orthographic variant
Clarkia nitens
(Under Clarkia speciosa subsp. nitens)
Synonym
Clarkia parviflora
(Under Clarkia xantiana subsp. parviflora)
Synonym
Clarkia prostrataNative
Clarkia purpureaNative
Clarkia purpurea subsp. purpureaNative
Clarkia purpurea subsp. quadrivulneraFOUR-SPOTNative
Clarkia purpurea subsp. vimineaNative
Clarkia rhomboideaNative
Clarkia rostrataBEAKED CLARKIANative
Clarkia rubicundaNative
Clarkia rubicunda subsp. blasdalei
(Under Clarkia rubicunda)
Synonym
Clarkia similisNative
Clarkia speciosaNative
Clarkia speciosa subsp. immaculataPISMO CLARKIANative
Clarkia speciosa subsp. nitensNative
Clarkia speciosa subsp. polyanthaNative
Clarkia speciosa subsp. speciosaNative
Clarkia springvillensisSPRINGVILLE CLARKIANative
Clarkia stellataNative
Clarkia tembloriensisNative
Clarkia tembloriensis subsp. calientensisVASEK'S CLARKIANative
Clarkia tembloriensis subsp. tembloriensisNative
Clarkia unguiculataNative
Clarkia virgataSIERRA CLARKIANative
Clarkia virgata subsp. australis
(Under Clarkia australis)
Synonym
Clarkia williamsoniiNative
Clarkia williamsonii f. incerta
(Under Clarkia williamsonii)
Synonym
Clarkia williamsonii var. incerta
(Under Clarkia williamsonii)
Synonym
Clarkia xantianaNative
Clarkia xantiana subsp. parvifloraKERN CANYON CLARKIANative
Clarkia xantiana subsp. xantianaNative
Claytonia
  ↳  Key to Claytonia
Claytonia bellidifolia
(Under Claytonia megarhiza)
Synonym
Claytonia chenopodina
(Under Claytonia nevadensis)
Synonym
Claytonia cordifoliaNative
Claytonia exiguaNative
Claytonia exigua subsp. exiguaNative
Claytonia exigua subsp. glaucaNative
Claytonia grayana
(Under Lewisia nevadensis)
Synonym
Claytonia gypsophiloidesNative
Claytonia lanceolataWESTERN SPRING BEAUTYNative
Claytonia lanceolata var. peirsonii
(Under Claytonia lanceolata)
Synonym
Claytonia lanceolata var. sessilifolia
(Under Claytonia lanceolata)
Synonym
Claytonia megarhizaFELL-FIELDS CLAYTONIANative
Claytonia megarhiza var. bellidifolia
(Under Claytonia megarhiza)
Synonym
Claytonia nevadensisNative
Claytonia palustrisMARSH CLAYTONIANative
Claytonia parvifloraNative
Claytonia parviflora subsp. grandifloraSTREAMBANK SPRING BEAUTYNative
Claytonia parviflora subsp. parvifloraNative
Claytonia parviflora subsp. parviflora
(Under Claytonia parviflora subsp. utahensis)
Synonym, in part
Claytonia parviflora subsp. utahensisNative
Claytonia parviflora subsp. viridisNative
Claytonia perfoliataROOREHNative
Claytonia perfoliata subsp. intermontanaNative
Claytonia perfoliata subsp. mexicanaNative
Claytonia perfoliata subsp. perfoliataNative
Claytonia perfoliata subsp. perfoliata
(Under Claytonia perfoliata subsp. intermontana)
Synonym, in part
Claytonia rubraNative
Claytonia rubra subsp. depressaNative
Claytonia rubra subsp. rubraNative
Claytonia saxosaNative
Claytonia sibiricaCANDY FLOWERNative
Claytonia sibirica var. bulbifera
(Under Claytonia sibirica)
Synonym
Claytonia sibirica var. sibirica
(Under Claytonia sibirica)
Synonym
Claytonia triphylla
(Under Lewisia triphylla)
Synonym
Claytonia umbellataGREAT BASIN CLAYTONIANative
Claytonia washingtonianaNative
Clematis
  ↳  Key to Clematis
CLEMATIS, VIRGIN'S BOWER
Clematis lasianthaCHAPARRAL CLEMATIS, PIPESTEM CLEMATISNative
Clematis ligusticifoliaWESTERN VIRGIN'S BOWERNative
Clematis paucifloraSOUTHERN CALIFORNIA CLEMATIS, FEW-FLOWERED CLEMATISNative
Cleomaceae
  ↳  Key to Cleomaceae
SPIDERFLOWER FAMILY
Cleome jonesii
(Under Cleomella jonesii)
Synonym
Cleome lutea
(Under Cleomella lutea)
Synonym
Cleome lutea var. jonesii
(Under Cleomella jonesii)
Synonym
Cleome lutea var. lutea
(Under Cleomella lutea)
Synonym
Cleome platycarpa
(Under Cleomella platycarpa)
Synonym
Cleome serrulata
(Under Cleomella serrulata)
Synonym
Cleome sparsifolia
(Under Cleomella sparsifolia)
Synonym
Cleomella
  ↳  Key to Cleomella
Cleomella arboreaBLADDERPODNative
Cleomella arborea var. angustataNative
Cleomella arborea var. arboreaNative
Cleomella arborea var. globosaNative
Cleomella brevipesSHORT-PEDICELLED CLEOMELLANative
Cleomella californicaNative
Cleomella hillmanii var. hillmaniiHILLMAN'S CLEOMELLANative
Cleomella jonesiiJONES' BEE PLANTNative
Cleomella luteaYELLOW BEE PLANTNative
Cleomella obtusifoliaMOJAVE STINKWEEDNative
Cleomella obtusifolia var. pubescens
(Under Cleomella obtusifolia)
Synonym
Cleomella oxystyloidesNative
Cleomella palmeriPALMER'S JACKASS-CLOVERNative
Cleomella parvifloraNative
Cleomella platycarpaGOLDEN BEE PLANTNative
Cleomella plocaspermaNative
Cleomella plocasperma var. mojavensis
(Under Cleomella plocasperma)
Synonym
Cleomella plocasperma var. stricta
(Under Cleomella plocasperma)
Synonym
Cleomella refractaJACKASS-CLOVERNative
Cleomella serrulataROCKY MOUNTAIN BEE PLANTNaturalized
Cleomella sparsifoliaNative
Clinopodium
  ↳  Key to Clinopodium
Clinopodium chandleriSAN MIGUEL SAVORYNative
Clinopodium douglasiiYERBA BUENANative
Clinopodium mimuloidesMONKEY-FLOWER SAVORYNative
Clintonia
  ↳  Key to Clintonia
Clintonia andrewsianaNative
Clintonia unifloraNative
Cneoridium
Cneoridium dumosumBUSHRUENative
Cnicus benedictus
(Under Centaurea benedicta)
Synonym
CochleariaSCURVYGRASS
Cochlearia groenlandicaGREENLAND COCHLEARIANative
Cochlearia officinalis subsp. arctica
(Under Cochlearia groenlandica)
Synonym
Cochlearia officinalis var. arctica
(Under Cochlearia groenlandica)
Synonym
Cogswellia rigida
(Under Lomatium rigidum)
Synonym
Coincya
Coincya monensis subsp. recurvataSTAR MUSTARDNaturalized
Coldenia canescens
(Under Tiquilia canescens)
Synonym
Coldenia nuttallii
(Under Tiquilia nuttallii)
Synonym
Coldenia palmeri
(Under Tiquilia palmeri)
Synonym
Coldenia plicata
(Under Tiquilia plicata)
Synonym
Coleogeton filiformis subsp. alpinus
(Under Stuckenia filiformis subsp. alpina)
Synonym
Coleogeton pectinatus
(Under Stuckenia pectinata)
Synonym
Coleogeton striatus
(Under Stuckenia striata)
Synonym
ColeogyneBLACKBUSH
Coleogyne ramosissimaNative
Coleosanthus argutus
(Under Brickellia atractyloides var. arguta)
Synonym
Coleosanthus californicus
(Under Brickellia californica)
Synonym
Coleosanthus desertorum
(Under Brickellia desertorum)
Synonym
Coleosanthus frutescens
(Under Brickellia frutescens)
Synonym
Coleosanthus grandiflorus
(Under Brickellia grandiflora)
Synonym
Coleosanthus greenei
(Under Brickellia greenei)
Synonym
Coleosanthus incanus
(Under Brickellia incana)
Synonym
Coleosanthus knappianus
(Under Brickellia knappiana)
Synonym
Coleosanthus linifolius
(Under Brickellia oblongifolia var. linifolia)
Synonym
Coleosanthus longifolius
(Under Brickellia longifolia)
Synonym
Coleosanthus microphyllus
(Under Brickellia microphylla var. microphylla)
Synonym
Coleosanthus nevinii
(Under Brickellia nevinii)
Synonym
Coleosanthus oblongifolius var. linifolius
(Under Brickellia oblongifolia var. linifolia)
Synonym
Coleosanthus scaber
(Under Brickellia microphylla var. scabra)
Synonym
Coleosanthus tener
(Under Brickellia californica)
Synonym
Collinsia
  ↳  Key to Collinsia
CHINESE-HOUSES
Collinsia antoninaSAN ANTONIO COLLINSIANative
Collinsia antonina subsp. purpurea
(Under Collinsia antonina)
Synonym
Collinsia bartsiifoliaNative
Collinsia bartsiifolia var. bartsiifoliaNative
Collinsia bartsiifolia var. davidsoniiNative
Collinsia bartsiifolia var. davidsonii
(Under Collinsia bartsiifolia var. stricta)
Misapplied name, in part
Collinsia bartsiifolia var. strictaNative
Collinsia callosaNative
Collinsia childiiNative
Collinsia concolorNative
Collinsia corymbosaROUND-HEADED CHINESE-HOUSESNative
Collinsia franciscana
(Under Collinsia multicolor)
Synonym
Collinsia grandifloraNative
Collinsia grandiflora var. pusilla
(Under Collinsia grandiflora)
Synonym
Collinsia greeneiNative
Collinsia heterophyllaNative
Collinsia heterophylla var. austromontanaDOWNY CHINESE-HOUSESNative
Collinsia heterophylla var. heterophyllaCHINESE-HOUSESNative
Collinsia linearisNative
Collinsia multicolorSAN FRANCISCO COLLINSIANative
Collinsia parryiNative
Collinsia parryi
(Under Collinsia antonina)
Misapplied name
Collinsia parvifloraBLUE-EYED MARYNative
Collinsia parviflora var. collina
(Under Collinsia sparsiflora var. collina)
Synonym
Collinsia rattaniiNative
Collinsia sparsifloraNative
Collinsia sparsiflora var. collinaNative
Collinsia sparsiflora var. sparsifloraNative
Collinsia tinctoriaNative
Collinsia torreyiNative
Collinsia torreyi var. brevicarinataNative
Collinsia torreyi var. latifoliaNative
Collinsia torreyi var. torreyiNative
Collinsia torreyi var. wrightiiNative
Collomia
  ↳  Key to Collomia
TRUMPET FLOWER
Collomia debilis var. larsenii
(Under Collomia larsenii)
Synonym
Collomia diversifoliaSERPENTINE COLLOMIANative
Collomia grandifloraLARGE-FLOWERED COLLOMIANative
Collomia heterophyllaVARIABLE-LEAF COLLOMIANative
Collomia larseniiTALUS COLLOMIANative
Collomia linearisNARROW-LEAF MOUNTAIN TRUMPETNative
Collomia rawsonianaRAWSON'S FLAMING-TRUMPETNative
Collomia tenellaSLENDER COLLOMIANative
Collomia tinctoriaSTAINING COLLOMIANative
Collomia tracyiTRACY'S COLLOMIANative
Colubrina
Colubrina californicaLAS ANIMAS COLUBRINANative
ColuteaBLADDER SENNA
Colutea arborescensNaturalized
ComandraBASTARD TOADFLAX
Comandra umbellata subsp. californicaNative
ComandraceaeBASTARD TOADFLAX FAMILY
Comarostaphylis
Comarostaphylis diversifolia
  ↳  Key to Comarostaphylis diversifolia
Native
Comarostaphylis diversifolia subsp. diversifoliaSUMMER HOLLYNative
Comarostaphylis diversifolia subsp. planifoliaNative
Comarostaphylis diversifolia var. planifolia
(Under Comarostaphylis diversifolia subsp. planifolia)
Synonym
Comarum
Comarum palustreMARSH CINQUEFOILNative
Comastoma
Comastoma tenellumSAMILAND GENTIANNative
Comastoma tenellum var. tenellum
(Under Comastoma tenellum)
Synonym
Commelina
Commelina benghalensisTROPICAL SPIDERWORTNaturalized
Commelinaceae
  ↳  Key to Commelinaceae
SPIDERWORT FAMILY
Condalia
Condalia globosa var. pubescensSPINY ABROJONative
Condalia lycioides var. canescens
(Under Ziziphus obtusifolia var. canescens)
Synonym
Condalia parryi
(Under Ziziphus parryi var. parryi)
Synonym
Condea
Condea emoryiDESERT LAVENDERNative
Conicosia
Conicosia pugioniformisNARROWLEAF ICEPLANTNaturalized
Conioselinum
Conioselinum chinense
(Under Conioselinum pacificum)
Synonym
Conioselinum pacificumNative
ConiumPOISON HEMLOCK
Conium maculatumNaturalized
ConringiaHARE'S EAR
Conringia orientalisNaturalized
ConsolidaLARKSPUR
Consolida ajacisNaturalized
Consolida ambigua
(Under Consolida ajacis)
Misapplied name
Constancea
Constancea neviniiNEVIN'S WOOLLY SUNFLOWERNative
Convolvulaceae
  ↳  Key to Convolvulaceae
MORNING-GLORY FAMILY
Convolvulus
  ↳  Key to Convolvulus
MORNING-GLORY, BINDWEED
Convolvulus althaeoidesWaif
Convolvulus aridus
(Under Calystegia macrostegia subsp. arida)
Synonym
Convolvulus aridus subsp. intermedius
(Under Calystegia macrostegia subsp. intermedia)
Synonym
Convolvulus aridus subsp. longilobus
(Under Calystegia macrostegia subsp. intermedia)
Synonym
Convolvulus aridus subsp. tenuifolius
(Under Calystegia macrostegia subsp. tenuifolia)
Synonym
Convolvulus arvensisBINDWEED, ORCHARD MORNING-GLORYNaturalized
Convolvulus binghamiae
(Under Calystegia sepium subsp. binghamiae)
Synonym
Convolvulus collinus
(Under Calystegia collina)
Synonym
Convolvulus cyclostegius
(Under Calystegia macrostegia subsp. cyclostegia)
Synonym
Convolvulus deltoideus
(Under Calystegia occidentalis subsp. fulcrata)
Synonym
Convolvulus fruticetorum
(Under Calystegia occidentalis subsp. occidentalis)
Synonym
Convolvulus fulcratus
(Under Calystegia occidentalis subsp. fulcrata)
Synonym
Convolvulus limnophilus
(Under Calystegia sepium subsp. limnophila)
Synonym
Convolvulus linearilobus
(Under Calystegia longipes)
Synonym
Convolvulus longipes
(Under Calystegia longipes)
Synonym
Convolvulus malacophyllus subsp. collinus
(Under Calystegia collina)
Synonym
Convolvulus malacophyllus subsp. pedicellatus
(Under Calystegia malacophylla subsp. pedicellata)
Synonym
Convolvulus nyctagineus
(Under Calystegia atriplicifolia subsp. buttensis)
Synonym, in part
Convolvulus occidentalis var. purpuratus
(Under Calystegia purpurata subsp. purpurata)
Synonym
Convolvulus occidentalis var. saxicola
(Under Calystegia purpurata subsp. saxicola)
Synonym
Convolvulus occidentalis var. solanensis
(Under Calystegia purpurata subsp. purpurata)
Synonym
Convolvulus peirsonii
(Under Calystegia peirsonii)
Synonym
Convolvulus polymorphus
(Under Calystegia occidentalis subsp. occidentalis)
Synonym
Convolvulus sepium var. dumetorum
(Under Calystegia sepium subsp. binghamiae)
Synonym
Convolvulus sepium var. repens
(Under Calystegia sepium subsp. limnophila)
Synonym
Convolvulus simulansSMALL-FLOWERED MORNING-GLORYNative
Convolvulus soldanella
(Under Calystegia soldanella)
Synonym
Convolvulus subacaulis
(Under Calystegia subacaulis subsp. subacaulis)
Synonym
Convolvulus subacaulis var. dolosus
(Under Calystegia subacaulis subsp. subacaulis)
Synonym
Convolvulus tricolorWaif
Convolvulus tridactylosa
(Under Calystegia collina subsp. tridactylosa)
Synonym
Conyza bilbaoana
(Under Erigeron sumatrensis)
Misapplied name
Conyza bonariensis
(Under Erigeron bonariensis)
Synonym
Conyza canadensis
(Under Erigeron canadensis)
Synonym
Conyza canadensis var. canadensis
(Under Erigeron canadensis)
Synonym
Conyza coulteri
(Under Laennecia coulteri)
Synonym
Conyza floribunda
(Under Erigeron sumatrensis)
Synonym
Conyza squamata
(Under Symphyotrichum subulatum var. squamatum)
Synonym
Conyza sumatrensis
(Under Erigeron sumatrensis)
Synonym
Coprosma
Coprosma repensMIRROR BUSHWaif
CoptisGOLDTHREAD
Coptis laciniataOREGON GOLDTHREADNative
Corallorhiza
  ↳  Key to Corallorhiza
CORALROOT
Corallorhiza maculataSPOTTED CORALROOTNative
Corallorhiza maculata var. maculataNative
Corallorhiza maculata var. occidentalisNative
Corallorhiza mertensianaWESTERN CORALROOTNative
Corallorhiza striataSTRIPED CORALROOTNative
Corallorhiza striata var. striata
(Under Corallorhiza striata)
Synonym
Corallorhiza striata var. vreelandii
(Under Corallorhiza striata)
Synonym
Corallorhiza trifidaNORTHERN CORALROOTNative
Cordylanthus
  ↳  Key to Cordylanthus
BIRD'S-BEAK
Cordylanthus bernardinus
(Under Cordylanthus eremicus subsp. eremicus)
Synonym
Cordylanthus capitatusYAKIMA BIRD'S-BEAKNative
Cordylanthus eremicusNative
Cordylanthus eremicus subsp. eremicusDESERT BIRD'S-BEAKNative
Cordylanthus eremicus subsp. kernensisKERN PLATEAU BIRD'S-BEAKNative
Cordylanthus ferrisianus
(Under Cordylanthus rigidus subsp. rigidus)
Synonym
Cordylanthus filifolius
(Under Cordylanthus rigidus subsp. setiger)
Illegitimate name
Cordylanthus hansenii
(Under Cordylanthus pilosus subsp. hansenii)
Synonym
Cordylanthus helleri
(Under Cordylanthus kingii subsp. helleri)
Synonym
Cordylanthus hispidus
(Under Chloropyron molle subsp. hispidum)
Synonym
Cordylanthus kingii subsp. helleriNative
Cordylanthus littoralis
(Under Cordylanthus rigidus subsp. littoralis)
Synonym
Cordylanthus littoralis subsp. platycephalus
(Under Cordylanthus rigidus subsp. rigidus)
Synonym
Cordylanthus maritimus
(Under Chloropyron maritimum)
Synonym
Cordylanthus maritimus subsp. canescens
(Under Chloropyron maritimum subsp. canescens)
Synonym
Cordylanthus maritimus subsp. maritimus
(Under Chloropyron maritimum subsp. maritimum)
Synonym
Cordylanthus maritimus subsp. palustris
(Under Chloropyron maritimum subsp. palustre)
Synonym
Cordylanthus mollis subsp. hispidus
(Under Chloropyron molle subsp. hispidum)
Synonym
Cordylanthus mollis subsp. mollis
(Under Chloropyron molle subsp. molle)
Synonym
Cordylanthus neviniiNative
Cordylanthus nidulariusMOUNT DIABLO BIRD'S-BEAKNative
Cordylanthus orcuttianus
(Under Dicranostegia orcuttiana)
Synonym
Cordylanthus pallescens
(Under Cordylanthus tenuis subsp. pallescens)
Synonym
Cordylanthus palmatus
(Under Chloropyron palmatum)
Synonym
Cordylanthus parviflorusSMALL-FLOWERED BIRD'S-BEAKNative
Cordylanthus pilosusNative
Cordylanthus pilosus subsp. bolanderi
(Under Cordylanthus tenuis subsp. tenuis)
Synonym
Cordylanthus pilosus subsp. diffusus
(Under Cordylanthus pilosus subsp. pilosus)
Synonym
Cordylanthus pilosus subsp. hanseniiNative
Cordylanthus pilosus subsp. pilosusNative
Cordylanthus pilosus subsp. trifidusNative
Cordylanthus pilosus var. brunneus
(Under Cordylanthus tenuis subsp. brunneus)
Synonym
Cordylanthus pringleiNative
Cordylanthus ramosusNative
Cordylanthus ramosus subsp. eremicus
(Under Cordylanthus eremicus subsp. eremicus)
Synonym
Cordylanthus ramosus subsp. setosus
(Under Cordylanthus ramosus)
Synonym
Cordylanthus rigidusNative
Cordylanthus rigidus subsp. brevibracteatusSHORT-BRACTED BIRD'S-BEAKNative
Cordylanthus rigidus subsp. littoralisSEASIDE BIRD'S-BEAKNative
Cordylanthus rigidus subsp. rigidusNative
Cordylanthus rigidus subsp. setigerNative
Cordylanthus rigidus var. compactus
(Under Cordylanthus rigidus subsp. rigidus)
Synonym
Cordylanthus rigidus var. ferrisianus
(Under Cordylanthus rigidus subsp. rigidus)
Synonym
Cordylanthus tecopensis
(Under Chloropyron tecopense)
Synonym
Cordylanthus tenuisNative
Cordylanthus tenuis subsp. barbatusFRESNO COUNTY BIRD'S-BEAKNative
Cordylanthus tenuis subsp. brunneusSERPENTINE BIRD'S-BEAKNative
Cordylanthus tenuis subsp. capillarisPENNELL'S BIRD'S-BEAKNative
Cordylanthus tenuis subsp. pallescensPALLID BIRD'S-BEAKNative
Cordylanthus tenuis subsp. tenuisNative
Cordylanthus tenuis subsp. viscidusNative
Cordylanthus viscidus
(Under Cordylanthus tenuis subsp. viscidus)
Synonym
CordylineCABBAGE TREE
Cordyline australisNEW ZEALAND CABBAGE TREENaturalized
Coreopsis
  ↳  Key to Coreopsis
Coreopsis atkinsoniana
(Under Coreopsis tinctoria)
Synonym
Coreopsis bigelovii
(Under Leptosyne bigelovii)
Synonym
Coreopsis californica
(Under Leptosyne californica)
Synonym
Coreopsis calliopsidea
(Under Leptosyne calliopsidea)
Synonym
Coreopsis douglasii
(Under Leptosyne douglasii)
Synonym
Coreopsis gigantea
(Under Leptosyne gigantea)
Synonym
Coreopsis hamiltonii
(Under Leptosyne hamiltonii)
Synonym
Coreopsis lanceolataGARDEN COREOPSISNaturalized
Coreopsis maritima
(Under Leptosyne maritima)
Synonym
Coreopsis stillmanii
(Under Leptosyne stillmanii)
Synonym
Coreopsis tinctoriaCALLIOPSISNaturalized
Coreopsis tinctoria var. atkinsoniana
(Under Coreopsis tinctoria)
Synonym
CorethrogyneCALIFORNIA-ASTER, SAND-ASTER
Corethrogyne filaginifoliaNative
Corethrogyne filaginifolia var. californica
(Under Corethrogyne filaginifolia)
Synonym
Coriandrum
Coriandrum sativumCORIANDER, CILANTRONaturalized
CorispermumBUGSEED
Corispermum americanum var. americanumAMERICAN BUGSEEDNative
Corispermum hyssopifolium
(Under Corispermum americanum var. americanum)
Misapplied name
Corispermum hyssopifolium var. americanum
(Under Corispermum americanum var. americanum)
Synonym
CornaceaeDOGWOOD FAMILY
Cornus
  ↳  Key to Cornus
DOGWOOD
Cornus ×californica
(Under Cornus sericea subsp. sericea)
Synonym
Cornus californica
(Under Cornus sericea subsp. sericea)
Synonym
Cornus californica var. nevadensis
(Under Cornus sericea subsp. sericea)
Synonym
Cornus canadensis
(Under Cornus unalaschkensis)
Misapplied name
Cornus glabrataBROWN DOGWOODNative
Cornus nuttalliiMOUNTAIN DOGWOODNative
Cornus occidentalis
(Under Cornus sericea subsp. occidentalis)
Synonym
Cornus sericeaAMERICAN DOGWOODNative
Cornus sericea subsp. occidentalisNative
Cornus sericea subsp. sericeaNative
Cornus sessilisNative
Cornus stolonifera
(Under Cornus sericea subsp. sericea)
Synonym
Cornus unalaschkensisBUNCHBERRYNative
Coronilla
  ↳  Key to Coronilla
Coronilla valentina subsp. glaucaWaif
Coronilla variaCROWN VETCHNaturalized
Coronopus didymus
(Under Lepidium didymum)
Synonym
Coronopus squamatus
(Under Lepidium coronopus)
Synonym
Cortaderia
  ↳  Key to Cortaderia
Cortaderia jubataPURPLE PAMPAS GRASS, JUBATA GRASSNaturalized
Cortaderia selloanaPAMPAS GRASSNaturalized
Corydalis
  ↳  Key to Corydalis
Corydalis aureaGOLDEN CORYDALISNative
Corydalis caseana subsp. caseanaSIERRA CORYDALIS, FITWEEDNative
CorylusHAZELNUT
Corylus californica
(Under Corylus cornuta subsp. californica)
Synonym
Corylus cornuta subsp. californicaCALIFORNIA HAZELNative
Corylus cornuta var. californica
(Under Corylus cornuta subsp. californica)
Synonym
Corylus rostrata var. tracyi
(Under Corylus cornuta subsp. californica)
Synonym
Coryphantha alversonii
(Under Escobaria alversonii)
Synonym
Coryphantha chlorantha
(Under Escobaria chlorantha)
Synonym
Coryphantha deserti
(Under Escobaria chlorantha)
Synonym
Coryphantha vivipara var. alversonii
(Under Escobaria alversonii)
Synonym
Coryphantha vivipara var. deserti
(Under Escobaria chlorantha)
Synonym
Coryphantha vivipara var. rosea
(Under Escobaria vivipara var. rosea)
Synonym
Cosmanthus grandiflorus
(Under Phacelia grandiflora)
Synonym
Cosmos
  ↳  Key to Cosmos
Cosmos bipinnatusGARDEN COSMOSNaturalized
Cosmos sulphureusGarden weed
CotaGOLDEN MARGUERITE, YELLOW CHAMOMILE
Cota tinctoriaGOLDEN MARGUERITEWaif
Cotoneaster
  ↳  Key to Cotoneaster
Cotoneaster franchetiiFRANCHET'S COTONEASTERNaturalized
Cotoneaster frigidusTREE COTONEASTERNaturalized
Cotoneaster hodjingensisEARTHQUAKE COTONEASTERNaturalized
Cotoneaster horizontalisWALL or HERRINGBONE COTONEASTERNaturalized
Cotoneaster integrifoliusENTIRE-LEAVED COTONEASTERNaturalized
Cotoneaster lacteusLATE COTONEASTERNaturalized
Cotoneaster microphyllus
(Under Cotoneaster integrifolius)
Misapplied name
Cotoneaster pannosa
(Under Cotoneaster pannosus)
Orthographic variant
Cotoneaster pannosusSILVERLEAF COTONEASTERNaturalized
Cotoneaster simonsiiHIMALAYAN COTONEASTERNaturalized
Cotula
  ↳  Key to Cotula
Cotula australisAUSTRALIAN COTULANaturalized
Cotula coronopifoliaBRASS-BUTTONSNaturalized
Cotyledon
Cotyledon burnhamii
(Under Sedum obtusatum)
Synonym
Cotyledon caespitosa var. paniculata
(Under Dudleya cymosa subsp. paniculata)
Synonym
Cotyledon obtusata
(Under Sedum obtusatum)
Synonym
Cotyledon orbiculata var. oblongaNaturalized
Cotyledon retusa
(Under Sedum sanhedrinum)
Synonym
Cotyledon yosemitensis
(Under Sedum obtusatum)
Synonym
Crassula
  ↳  Key to Crassula
Crassula aquaticaNative
Crassula argentea
(Under Crassula ovata)
Synonym
Crassula colligata subsp. lamprospermaNaturalized
Crassula connataPYGMY-WEEDNative
Crassula connata var. connata
(Under Crassula connata)
Synonym
Crassula connata var. erectoides
(Under Crassula connata)
Synonym
Crassula connata var. eremica
(Under Crassula connata)
Synonym
Crassula connata var. subsimplex
(Under Crassula connata)
Synonym
Crassula erecta
(Under Crassula connata)
Synonym
Crassula multicava subsp. multicavaFAIRY CRASSULAWaif
Crassula ovataJADE PLANTWaif
Crassula saginoides
(Under Crassula aquatica)
Synonym
Crassula solieriNative
Crassula tetragonaMINIATURE or CHINESE PINE-TREENaturalized
Crassula tillaeaNaturalized
Crassulaceae
  ↳  Key to Crassulaceae
STONECROP FAMILY
Crataegus
  ↳  Key to Crataegus
HAWTHORN
Crataegus castlegarensisNative
Crataegus columbiana
(Under Crataegus douglasii)
Synonym
Crataegus douglasiiNative
Crataegus gaylussaciaNative
Crataegus monogynaNaturalized
Crataegus suksdorfii
(Under Crataegus gaylussacia)
Synonym
Crepis
  ↳  Key to Crepis
HAWKSBEARD
Crepis acuminataNative
Crepis bakeriNative
Crepis bakeri subsp. bakeriNative
Crepis bakeri subsp. cusickiiNative
Crepis bakeri subsp. idahoensisNative
Crepis barbata
(Under Tolpis barbata)
Synonym
Crepis bursifoliaWaif
Crepis capillarisNaturalized
Crepis geisseana
(Under Malacothrix clevelandii)
Synonym
Crepis intermediaNative
Crepis modocensisNative
Crepis modocensis subsp. modocensisNative
Crepis modocensis subsp. subacaulisNative
Crepis monticolaNative
Crepis nanaNative
Crepis nana subsp. ramosa
(Under Crepis nana)
Synonym
Crepis nana var. ramosa
(Under Crepis nana)
Synonym
Crepis occidentalisNative
Crepis occidentalis subsp. conjunctaNative
Crepis occidentalis subsp. costataNative
Crepis occidentalis subsp. occidentalisNative
Crepis occidentalis subsp. pumilaNative
Crepis pleurocarpaNative
Crepis pulchraNaturalized
Crepis runcinataNative
Crepis runcinata subsp. andersoniiNative
Crepis runcinata subsp. halliiHALL'S MEADOW HAWKSBEARDNative
Crepis runcinata var. andersonii
(Under Crepis runcinata subsp. andersonii)
Synonym
Crepis setosaNaturalized
Crepis tectorumNaturalized
Crepis vesicaria subsp. taraxacifoliaNaturalized
Cressa
Cressa truxillensisALKALI WEEDNative
Cressa truxillensis var. vallicola
(Under Cressa truxillensis)
Synonym
Creusa tetragona
(Under Crassula tetragona)
Synonym
Crocanthemum
  ↳  Key to Crocanthemum
SUN-ROSE, RUSH-ROSE
Crocanthemum aldersoniiALDERSON'S RUSH-ROSENative
Crocanthemum greeneiISLAND RUSH-ROSENative
Crocanthemum scopariumPEAK RUSH-ROSENative
Crocanthemum scoparium var. scopariumNative
Crocanthemum scoparium var. vulgareNative
Crocanthemum suffrutescensBISBEE PEAK RUSH-ROSENative
CrocidiumSPRING GOLD
Crocidium multicauleNative
Crocosmia
Crocosmia ×crocosmiifloraNaturalized
Crossosoma
  ↳  Key to Crossosoma
Crossosoma bigeloviiNative
Crossosoma californicumCATALINA CROSSOSOMANative
Crossosomataceae
  ↳  Key to Crossosomataceae
CROSSOSOMA FAMILY
Croton
  ↳  Key to Croton
Croton californicusNative
Croton californicus var. mohavensis
(Under Croton californicus)
Synonym
Croton californicus var. tenuis
(Under Croton californicus)
Synonym
Croton setigerDOVEWEED, TURKEY-MULLEINNative
Croton setigerus
(Under Croton setiger)
Orthographic variant
Croton wigginsiiWIGGINS' CROTONNative
CrucianellaCROSS-WORT
Crucianella angustifoliaNaturalized
Crupina
Crupina vulgarisBEARDED CREEPERNaturalized
Crypsis
  ↳  Key to Crypsis
PRICKLE GRASS
Crypsis alopecuroidesFOXTAIL PRICKLE GRASSNaturalized
Crypsis niliaca
(Under Crypsis vaginiflora)
Synonym
Crypsis schoenoidesSWAMP PRICKLE GRASSNaturalized
Crypsis vaginifloraMODEST PRICKLE GRASSNaturalized
Cryptantha
  ↳  Key to Cryptantha
Cryptantha abramsii
(Under Cryptantha clevelandii)
Synonym
Cryptantha affinisSIDE-GROOVED CRYPTANTHANative
Cryptantha ambiguaWILKES' CRYPTANTHANative
Cryptantha angelica
(Under Johnstonella angelica)
Synonym
Cryptantha angustifolia
(Under Johnstonella angustifolia)
Synonym
Cryptantha arenicola
(Under Cryptantha nevadensis)
Synonym
Cryptantha barbigeraNative
Cryptantha barbigera var. barbigeraBEARDED CRYPTANTHANative
Cryptantha barbigera var. fergusoniaePALM SPRINGS CRYPTANTHANative
Cryptantha bradburiana
(Under Oreocarya glomerata)
Synonym
Cryptantha brandegeei
(Under Cryptantha clevelandii)
Synonym
Cryptantha catalinensisSANTA CATALINA ISLAND CRYPTANTHANative
Cryptantha cinerea var. abortiva
(Under Oreocarya abortiva)
Synonym
Cryptantha circumscissa
(Under Greeneocharis circumscissa)
Synonym
Cryptantha circumscissa var. circumscissa
(Under Greeneocharis circumscissa var. circumscissa)
Synonym
Cryptantha circumscissa var. hispida
(Under Greeneocharis circumscissa var. circumscissa)
Synonym
Cryptantha circumscissa var. rosulata
(Under Greeneocharis circumscissa var. rosulata)
Synonym
Cryptantha clementinaSan Clemente Island Dune CryptanthaNative
Cryptantha clevelandiiNative
Cryptantha clevelandii var. brandegeei
(Under Cryptantha clevelandii)
Synonym
Cryptantha clevelandii var. clevelandiiCLEVELAND'S CRYPTANTHANative
Cryptantha clevelandii var. dissita
(Under Cryptantha dissita)
Synonym
Cryptantha clevelandii var. florosaCOASTAL CRYPTANTHANative
Cryptantha clevelandii var. hispidissima
(Under Cryptantha hispidissima)
Synonym
Cryptantha clokeyiCLOKEY'S CRYPTANTHANative
Cryptantha confertiflora
(Under Oreocarya confertiflora)
Synonym
Cryptantha corollataCOAST RANGE CRYPTANTHANative
Cryptantha costata
(Under Johnstonella costata)
Synonym
Cryptantha crinitaSILKY CRYPTANTHANative
Cryptantha crymophila
(Under Oreocarya crymophila)
Synonym
Cryptantha cyclopteraTUCSON CRYPTANTHANative
Cryptantha decipiensGRAVEL CRYPTANTHANative
Cryptantha decipiens
(Under Cryptantha rattanii)
Misapplied name
Cryptantha decipiens var. corollata
(Under Cryptantha corollata)
Synonym
Cryptantha dissitaLAKE CRYPTANTHANative
Cryptantha dumetorumSCRAMBLING CRYPTANTHANative
Cryptantha echinellaHEDGEHOG CRYPTANTHANative
Cryptantha excavataDEEP-SCARRED CRYPTANTHANative
Cryptantha fendleriSAND DUNE CRYPTANTHANative
Cryptantha flaccidaWEAK-STEMMED or PALE CRYPTANTHANative
Cryptantha flavoculata
(Under Oreocarya flavoculata)
Synonym
Cryptantha ganderiGANDER'S CRYPTANTHANative
Cryptantha glomerifloraCLUSTERED-FLOWER CRYPTANTHANative
Cryptantha gracilisSLENDER CRYPTANTHANative
Cryptantha hanseni
(Under Cryptantha intermedia var. intermedia)
Synonym
Cryptantha hendersoniiHENDERSON'S CRYPTANTHANative
Cryptantha hispidissimaBRISTLY CRYPTANTHANative
Cryptantha hispidulaNAPA CRYPTANTHANative
Cryptantha hoffmannii
(Under Oreocarya hoffmannii)
Synonym
Cryptantha holoptera
(Under Johnstonella holoptera)
Synonym
Cryptantha hooveriHOOVER'S CRYPTANTHANative
Cryptantha humilis
(Under Oreocarya humilis subsp. humilis)
Synonym
Cryptantha inaequata
(Under Johnstonella inaequata)
Synonym
Cryptantha incanaTULARE CRYPTANTHANative
Cryptantha intermediaNative
Cryptantha intermedia var. hendersonii
(Under Cryptantha hendersonii)
Synonym
Cryptantha intermedia var. intermediaCOMMON CRYPTANTHANative
Cryptantha intermedia var. johnstoniiJOHNSTON'S CRYPTANTHANative
Cryptantha intermedia var. rigida
(Under Cryptantha juniperensis)
Synonym
Cryptantha juniperensisRIGID CRYPTANTHANative
Cryptantha kinkiensisSAN CLEMENTE ISLAND UPLAND CRYPTANTHANative
Cryptantha leiocarpaBEACH CRYPTANTHANative
Cryptantha leiocarpa var. hispidissima
(Under Cryptantha hispidissima)
Synonym
Cryptantha mariposaeMARIPOSA CRYPTANTHANative
Cryptantha maritimaGUADALUPE CRYPTANTHANative
Cryptantha maritima var. maritimaGUADALUPE CRYPTANTHANative
Cryptantha maritima var. pilosaTUFTED HAIRED CRYPTANTHANative
Cryptantha micrantha var. lepida
(Under Eremocarya lepida)
Synonym
Cryptantha micrantha var. micrantha
(Under Eremocarya micrantha var. micrantha)
Synonym
Cryptantha micromeresMINUTE-FLOWERED CRYPTANTHANative
Cryptantha microstachysTEJON CRYPTANTHANative
Cryptantha milobakeriMILO BAKER'S CRYPTANTHANative
Cryptantha mohavensisMOJAVE CRYPTANTHANative
Cryptantha muricataNative
Cryptantha muricata var. clokeyi
(Under Cryptantha clokeyi)
Synonym
Cryptantha muricata var. denticulataPRICKLY-NUT CRYPTANTHANative
Cryptantha muricata var. jonesiiJONES' CRYPTANTHANative
Cryptantha muricata var. muricataSHOWY PRICKLY-NUT CRYPTANTHANative
Cryptantha nemacladaCOLUSA CRYPTANTHANative
Cryptantha nevadensisNEVADA CRYPTANTHANative
Cryptantha nevadensis var. rigida
(Under Cryptantha juniperensis)
Synonym
Cryptantha nubigena
(Under Oreocarya nubigena)
Synonym
Cryptantha oxygonaSHARP-NUT CRYPTANTHANative
Cryptantha pterocaryaNative
Cryptantha pterocarya var. cycloptera
(Under Cryptantha cycloptera)
Synonym
Cryptantha pterocarya var. pterocaryaWINGED-NUT CRYPTANTHANative
Cryptantha pterocarya var. purpusiiPURPUS' CRYPTANTHANative
Cryptantha pterocarya var. stenolobaNARROW-LOBED CRYPTANTHANative
Cryptantha racemosa
(Under Johnstonella racemosa)
Synonym
Cryptantha rattaniiRATTAN'S CRYPTANTHANative
Cryptantha recurvataCURVED-NUT CRYPTANTHANative
Cryptantha roosiorum
(Under Oreocarya roosiorum)
Synonym
Cryptantha rostellataRED-STEMMED CRYPTANTHANative
Cryptantha schoolcraftii
(Under Oreocarya schoolcraftii)
Synonym
Cryptantha scopariaSNAKE RIVER CRYPTANTHANative
Cryptantha similis
(Under Greeneocharis similis)
Synonym
Cryptantha simulansPINE CRYPTANTHANative
Cryptantha sobolifera
(Under Oreocarya sobolifera)
Synonym
Cryptantha sparsifloraFEW-FLOWERED CRYPTANTHANative
Cryptantha spithamaeaTUOLUMNE CRYPTANTHANative
Cryptantha subretusa
(Under Oreocarya subretusa)
Synonym
Cryptantha torreyanaNative
Cryptantha torreyana var. pumilaDWARF CRYPTANTHANative
Cryptantha torreyana var. scrutata
(Under Cryptantha milobakeri)
Synonym
Cryptantha torreyana var. torreyanaNORTHERN CRYPTANTHANative
Cryptantha traskiaeTRASK'S CRYPTANTHANative
Cryptantha tumulosa
(Under Oreocarya tumulosa)
Synonym
Cryptantha utahensisSCENTED CRYPTANTHANative
Cryptantha virginensis
(Under Oreocarya virginensis)
Synonym
Cryptantha watsoniiWATSON'S CRYPTANTHANative
Cryptantha wigginsiiWIGGINS'S CRYPTANTHANative
Cryptogramma
  ↳  Key to Cryptogramma
PARSLEY FERN, ROCK-BRAKE
Cryptogramma acrostichoidesAMERICAN PARSLEY FERNNative
Cryptogramma cascadensisCASCADE PARSLEY FERNNative
Cucumis
  ↳  Key to Cucumis
CUCUMBER, MELON
Cucumis melo var. dudaimDUDAIM MELONNaturalized
Cucumis myriocarpusPADDY MELONNaturalized
Cucurbita
  ↳  Key to Cucurbita
GOURD, FIELD PUMPKIN, SQUASH
Cucurbita californica
(Under Cucurbita palmata)
Synonym
Cucurbita digitataFINGER-LEAVED GOURDNative
Cucurbita foetidissimaBUFFALO GOURD, CALABAZILLANative
Cucurbita palmataCOYOTE MELONNative
Cucurbita pepo var. pepoCALABAZA, FIELD PUMPKINNaturalized
Cucurbitaceae
  ↳  Key to Cucurbitaceae
GOURD FAMILY
CuniculotinusPANAMINT ROCK-GOLDENROD
Cuniculotinus gramineusNative
Cupressaceae
  ↳  Key to Cupressaceae
CYPRESS FAMILY
Cupressus abramsiana
(Under Hesperocyparis abramsiana)
Synonym
Cupressus abramsiana subsp. butanoensis
(Under Hesperocyparis abramsiana var. butanoensis)
Synonym
Cupressus abramsiana subsp. locatellii
(Under Hesperocyparis abramsiana)
Synonym
Cupressus abramsiana subsp. neolomondensis
(Under Hesperocyparis abramsiana)
Synonym
Cupressus abramsiana subsp. opleri
(Under Hesperocyparis abramsiana)
Synonym
Cupressus arizonica subsp. arizonica
(Under Hesperocyparis stephensonii)
Misapplied name
Cupressus arizonica subsp. nevadensis
(Under Hesperocyparis nevadensis)
Synonym
Cupressus arizonica subsp. revealiana
(Under Hesperocyparis stephensonii)
Synonym
Cupressus arizonica subsp. stephensonii
(Under Hesperocyparis stephensonii)
Synonym
Cupressus arizonica var. glabra
(Under Hesperocyparis stephensonii)
Misapplied name
Cupressus arizonica var. nevadensis
(Under Hesperocyparis nevadensis)
Synonym
Cupressus arizonica var. revealiana
(Under Hesperocyparis stephensonii)
Synonym
Cupressus arizonica var. stephensonii
(Under Hesperocyparis stephensonii)
Synonym
Cupressus bakeri
(Under Hesperocyparis bakeri)
Synonym
Cupressus bakeri subsp. bakeri
(Under Hesperocyparis bakeri)
Synonym
Cupressus bakeri subsp. matthewsii
(Under Hesperocyparis bakeri)
Synonym
Cupressus butanoensis
(Under Hesperocyparis abramsiana var. butanoensis)
Synonym
Cupressus forbesii
(Under Hesperocyparis forbesii)
Synonym
Cupressus goveniana
(Under Hesperocyparis goveniana)
Synonym
Cupressus goveniana subsp. gibsonensis
(Under Hesperocyparis goveniana)
Synonym
Cupressus goveniana subsp. goveniana
(Under Hesperocyparis goveniana)
Synonym
Cupressus goveniana subsp. pigmaea
(Under Hesperocyparis pigmaea)
Synonym
Cupressus goveniana subsp. pygmaea
(Under Hesperocyparis pigmaea)
Orthographic variant
Cupressus goveniana subsp. pygmaea
(Under Hesperocyparis pigmaea)
Superfluous name
Cupressus goveniana subsp. pygmaea
(Under Hesperocyparis pigmaea)
Orthographic variant
Cupressus goveniana var. pygmaea
(Under Hesperocyparis pigmaea)
Orthographic variant
Cupressus goveniana var. pygmaea
(Under Hesperocyparis pigmaea)
Orthographic variant
Cupressus guadalupensis var. forbesii
(Under Hesperocyparis forbesii)
Synonym
Cupressus lawsoniana
(Under Chamaecyparis lawsoniana)
Synonym
Cupressus macnabiana
(Under Hesperocyparis macnabiana)
Synonym
Cupressus macnabiana var. nevadensis
(Under Hesperocyparis nevadensis)
Synonym
Cupressus macrocarpa
(Under Hesperocyparis macrocarpa)
Synonym
Cupressus macrocarpa subsp. lobosensis
(Under Hesperocyparis macrocarpa)
Synonym
Cupressus nevadensis
(Under Hesperocyparis nevadensis)
Synonym
Cupressus nootkatensis
(Under Callitropsis nootkatensis)
Synonym
Cupressus pygmaea
(Under Hesperocyparis pigmaea)
Orthographic variant
Cupressus revealiana
(Under Hesperocyparis stephensonii)
Synonym
Cupressus sargentii
(Under Hesperocyparis sargentii)
Synonym
Cupressus sargentii var. duttonii
(Under Hesperocyparis sargentii)
Synonym
Cupressus stephensonii
(Under Hesperocyparis stephensonii)
Synonym
Cuscuta
  ↳  Key to Cuscuta
DODDER
Cuscuta approximataALFALFA DODDERNaturalized
Cuscuta approximata var. urceolata
(Under Cuscuta approximata)
Synonym
Cuscuta brachycalyxNative
Cuscuta brachycalyx var. apodanthera
(Under Cuscuta brachycalyx)
Synonym
Cuscuta californicaCHAPARRAL DODDERNative
Cuscuta californica var. apiculataNative
Cuscuta californica var. apodanthera
(Under Cuscuta brachycalyx)
Synonym
Cuscuta californica var. breviflora
(Under Cuscuta occidentalis)
Synonym
Cuscuta californica var. californicaNative
Cuscuta californica var. papillosaNative
Cuscuta campestrisFIELD DODDERNative
Cuscuta cephalanthiBUTTONBUSH DODDERNative
Cuscuta cupulata
(Under Cuscuta approximata)
Synonym
Cuscuta denticulataSMALL-TOOTH DODDERNative
Cuscuta formosana
(Under Cuscuta japonica var. formosana)
Synonym
Cuscuta hispidula
(Under Cuscuta indecora var. indecora)
Synonym
Cuscuta howellianaBOGGS LAKE DODDERNative
Cuscuta indecora var. bifida
(Under Cuscuta indecora var. indecora)
Synonym
Cuscuta indecora var. indecoraLARGE-SEEDED DODDERNative
Cuscuta indecora var. neuropetala
(Under Cuscuta indecora var. indecora)
Synonym
Cuscuta japonica var. formosanaJAPANESE DODDERUrban weed expected in wildlands
Cuscuta jepsoniiNative
Cuscuta neuropetala
(Under Cuscuta indecora var. indecora)
Synonym
Cuscuta nevadensisNative
Cuscuta obtusiflora var. glandulosaNative
Cuscuta occidentalisNative
Cuscuta pacificaGOLDENTHREADNative
Cuscuta pacifica var. pacificaNative
Cuscuta pacifica var. papillataNative
Cuscuta pentagona var. calycina
(Under Cuscuta campestris)
Synonym
Cuscuta reflexaGIANT DODDERExtirpated weed
Cuscuta salinaSALT DODDERNative
Cuscuta salina var. acuminata
(Under Cuscuta suksdorfii)
Synonym
Cuscuta salina var. apoda
(Under Cuscuta nevadensis)
Synonym
Cuscuta salina var. major
(Under Cuscuta pacifica var. pacifica)
Synonym
Cuscuta salina var. papillata
(Under Cuscuta pacifica var. papillata)
Synonym
Cuscuta suaveolensFRINGED DODDERNaturalized
Cuscuta subinclusaNative
Cuscuta subinclusa var. abbreviata
(Under Cuscuta pacifica var. pacifica)
Synonym
Cuscuta suksdorfiiMOUNTAIN DODDERNative
Cuscuta suksdorfii var. subpedicellata
(Under Cuscuta suksdorfii)
Synonym
Cuscuta suksdorfii var. suksdorfii
(Under Cuscuta suksdorfii)
Synonym
Cuscuta veatchiiNative
Cuscuta veatchii var. apoda
(Under Cuscuta nevadensis)
Synonym
Cuscuta vivipara
(Under Cuscuta nevadensis)
Synonym ined.
Cusickiella
  ↳  Key to Cusickiella
Cusickiella douglasiiNative
Cusickiella quadricostataBODIE HILLS CUSICKIELLANative
Cyanopsis muricata
(Under Volutaria muricata)
Synonym
Cyathea cooperi
(Under Sphaeropteris cooperi)
Synonym
CyatheaceaeCLIFF FERN FAMILY
Cycladenia
Cycladenia humilis
  ↳  Key to Cycladenia humilis
Native
Cycladenia humilis var. humilisNative
Cycladenia humilis var. jonesiiNative
Cycladenia humilis var. tomentosa
(Under Cycladenia humilis var. humilis)
Synonym
Cycladenia humilis var. venustaNative
Cycladenia venusta
(Under Cycladenia humilis var. venusta)
Synonym
CyclolomaWINGED PIGWEED
Cycloloma atriplicifoliumNaturalized
Cyclospermum
Cyclospermum leptophyllumNaturalized
Cylindropuntia
  ↳  Key to Cylindropuntia
CHOLLA
Cylindropuntia ×fosbergii
(Under Cylindropuntia fosbergii)
Synonym
Cylindropuntia ×munzii
(Under Cylindropuntia munzii)
Synonym
Cylindropuntia ×wigginsii
(Under Cylindropuntia echinocarpa)
Synonym
Cylindropuntia acanthocarpa var. acanthocarpaBUCKHORN CHOLLANative
Cylindropuntia acanthocarpa var. coloradensis
(Under Cylindropuntia acanthocarpa var. acanthocarpa)
Synonym
Cylindropuntia bernardinaCANE or VALLEY CHOLLANative
Cylindropuntia bigeloviiTEDDY-BEAR CHOLLANative
Cylindropuntia californica var. californicaSNAKE CHOLLANative
Cylindropuntia californica var. parkeri
(Under Cylindropuntia bernardina)
Synonym
Cylindropuntia chuckwallensisCHUCKWALLA CHOLLANative
Cylindropuntia echinocarpaSILVER or GOLDEN CHOLLANative
Cylindropuntia fosbergiiFOSBERG'S OR MASON VALLEY CHOLLANative
Cylindropuntia ganderiGANDER'S CHOLLANative
Cylindropuntia munziiMUNZ'S CHOLLANative
Cylindropuntia proliferaCOAST CHOLLANative
Cylindropuntia ramosissimaDIAMOND CHOLLA, PENCIL CACTUSNative
Cylindropuntia wigginsii
(Under Cylindropuntia echinocarpa)
Synonym
Cylindropuntia wolfiiWOLF'S CHOLLANative
Cymbalaria
Cymbalaria muralisKENILWORTH IVYNaturalized
Cymopterus
  ↳  Key to Cymopterus
Cymopterus aboriginumNative
Cymopterus cinerariusNative
Cymopterus deserticolaDESERT CYMOPTERUSNative
Cymopterus gilmaniiGILMAN'S CYMOPTERUSNative
Cymopterus globosusGLOBOSE CYMOPTERUSNative
Cymopterus multinervatusPURPLE-NERVE CYMOPTERUSNative
Cymopterus panamintensisNative
Cymopterus panamintensis var. acutifoliusNative
Cymopterus panamintensis var. panamintensisNative
Cymopterus purpurascensNative
Cymopterus ripleyiRIPLEY'S CYMOPTERUSNative
Cymopterus ripleyi var. saniculoides
(Under Cymopterus ripleyi)
Synonym
Cymopterus terebinthinusNative
Cymopterus terebinthinus var. californicusNative
Cymopterus terebinthinus var. petraeusNative
Cynanchum utahense
(Under Funastrum utahense)
Synonym
Cynara
Cynara cardunculus
  ↳  Key to Cynara cardunculus
Naturalized
Cynara cardunculus subsp. cardunculusARTICHOKENaturalized
Cynara cardunculus subsp. flavescensNaturalized
Cynara scolymus
(Under Cynara cardunculus subsp. cardunculus)
Synonym
CynodonBERMUDA GRASS, DOG'S-TOOTH GRASS
Cynodon dactylonBERMUDA GRASSNaturalized
CynoglossumHOUND'S TONGUE
Cynoglossum grande
(Under Adelinia grandis)
Synonym
Cynoglossum occidentale
(Under Andersonglossum occidentale)
Synonym
Cynoglossum officinaleCOMMON HOUND'S TONGUENaturalized
Cynosurus
  ↳  Key to Cynosurus
DOGTAIL GRASS
Cynosurus cristatusCRESTED DOGTAIL GRASSNaturalized
Cynosurus echinatusBRISTLY DOGTAIL GRASSNaturalized
Cyperaceae
  ↳  Key to Cyperaceae
SEDGE FAMILY
Cyperus
  ↳  Key to Cyperus
FLATSEDGE, NUTSEDGE, GALINGALE
Cyperus acuminatusNative
Cyperus albomarginatus
(Under Cyperus flavicomus)
Synonym
Cyperus aristatus
(Under Cyperus squarrosus)
Synonym
Cyperus bipartitusNative
Cyperus diandrus var. castaneus
(Under Cyperus niger)
Synonym
Cyperus difformisNaturalized
Cyperus eragrostisNative
Cyperus erythrorhizosNative
Cyperus esculentusNative
Cyperus esculentus var. heermanniiNative
Cyperus esculentus var. leptostachyusNative
Cyperus esculentus var. macrostachyusNative
Cyperus ferax
(Under Cyperus odoratus)
Synonym
Cyperus flavescensNaturalized
Cyperus flavescens var. poiformis
(Under Cyperus flavescens)
Synonym
Cyperus flavicomusNaturalized
Cyperus fuscusNaturalized
Cyperus hansenii
(Under Cyperus strigosus)
Synonym
Cyperus inflexus
(Under Cyperus squarrosus)
Synonym
Cyperus involucratusNaturalized
Cyperus iriaNaturalized
Cyperus laevigatusNative
Cyperus nigerNative
Cyperus niger var. capitatus
(Under Cyperus niger)
Synonym
Cyperus niger var. castaneus
(Under Cyperus bipartitus)
Synonym
Cyperus niger var. castaneus
(Under Cyperus niger)
Synonym
Cyperus odoratusNative
Cyperus parishiiNative
Cyperus rivularis
(Under Cyperus bipartitus)
Synonym
Cyperus rotundusPURPLE NUTSEDGENaturalized
Cyperus squarrosusNative
Cyperus strigosusFALSE NUTSEDGENative
Cyperus tenellus
(Under Isolepis levynsiana)
Synonym
Cypripedium
  ↳  Key to Cypripedium
LADY'S-SLIPPER
Cypripedium californicumCALIFORNIA LADY'S-SLIPPERNative
Cypripedium fasciculatumCLUSTERED LADY'S-SLIPPERNative
Cypripedium montanumMOUNTAIN LADY'S-SLIPPERNative
Cypripedium parviflorum var. makasinNORTHERN SMALL YELLOW LADY'S-SLIPPERNative
Cypselea
Cypselea humifusaNaturalized
CyrtomiumHOLLY FERN
Cyrtomium falcatumNaturalized
CystopteridaceaeFRAGILE FERN FAMILY
CystopterisFRAGILE FERN
Cystopteris fragilisNative
Cytisus
  ↳  Key to Cytisus
Cytisus canariensis
(Under Genista canariensis)
Synonym
Cytisus linifolius
(Under Genista linifolia)
Synonym
Cytisus maderensis
(Under Genista maderensis)
Synonym
Cytisus monspessulanus
(Under Genista monspessulana)
Synonym
Cytisus multiflorusSPANISH or PORTUGUESE BROOMNaturalized
Cytisus proliferusTREE LUCERNENaturalized
Cytisus scopariusSCOTCH BROOMNaturalized
Cytisus scoparius var. andreanus
(Under Cytisus scoparius)
Synonym
Cytisus scoparius var. scoparius
(Under Cytisus scoparius)
Synonym
Cytisus striatusNaturalized
DactylisORCHARD GRASS
Dactylis glomerataNaturalized
Dactyloctenium
Dactyloctenium aegyptiumDURBAN CROWFOOTNaturalized
Dalea
  ↳  Key to Dalea
Dalea arborescens
(Under Psorothamnus arborescens var. arborescens)
Synonym
Dalea californica
(Under Psorothamnus arborescens var. simplicifolius)
Synonym
Dalea emoryi
(Under Psorothamnus emoryi)
Synonym
Dalea fremontii
(Under Psorothamnus fremontii var. fremontii)
Synonym
Dalea fremontii var. minutifolia
(Under Psorothamnus arborescens var. minutifolius)
Synonym
Dalea fremontii var. saundersii
(Under Psorothamnus arborescens var. arborescens)
Synonym
Dalea mollisNative
Dalea mollissimaNative
Dalea ornataORNATE DALEANative
Dalea parryi
(Under Marina parryi)
Synonym
Dalea polydenia
(Under Psorothamnus polydenius)
Synonym
Dalea schottii
(Under Psorothamnus schottii)
Synonym
Dalea schottii var. puberula
(Under Psorothamnus schottii)
Synonym
Dalea searlsiaeNative
Dalea spinosa
(Under Psorothamnus spinosus)
Synonym
Damasonium
Damasonium californicumNative
Danthonia
  ↳  Key to Danthonia
OAT GRASS
Danthonia californicaCALIFORNIA OAT GRASSNative
Danthonia californica var. americana
(Under Danthonia californica)
Synonym
Danthonia californica var. californica
(Under Danthonia californica)
Synonym
Danthonia decumbensMOUNTAIN HEATH GRASSWaif
Danthonia intermedia subsp. intermediaINTERMEDIATE OAT GRASSNative
Danthonia pilosa
(Under Rytidosperma penicillatum)
Misapplied name
Danthonia racemosa
(Under Rytidosperma racemosum)
Synonym
Danthonia unispicataONE-SPIKE OAT GRASSNative
DarlingtoniaCALIFORNIA PITCHER-PLANT
Darlingtonia californicaNative
Darlingtonia rediviva
(Under Styrax redivivus)
Synonym
DarmeraUMBRELLA PLANT
Darmera peltataNative
Dasiphora
Dasiphora fruticosaSHRUBBY CINQUEFOILNative
DasyochloaFLUFF GRASS
Dasyochloa pulchellaNative
Datisca
Datisca glomerataDURANGO ROOTNative
DatiscaceaeDATISCA FAMILY
Datura
  ↳  Key to Datura
JIMSON WEED
Datura discolorNative
Datura feroxNaturalized
Datura meteloides
(Under Datura wrightii)
Synonym
Datura stramoniumNaturalized
Datura stramonium var. tatula
(Under Datura stramonium)
Synonym
Datura wrightiiNative
Daucus
  ↳  Key to Daucus
Daucus carotaCARROT, QUEEN ANNE'S LACENaturalized
Daucus pusillusNative
Dedeckera
Dedeckera eurekensisJULY GOLDNative
Deinandra
  ↳  Key to Deinandra
TARWEED, TARPLANT
Deinandra aridaRED ROCK TARPLANTNative
Deinandra bacigalupiiLIVERMORE TARPLANTNative
Deinandra clementinaISLAND TARPLANTNative
Deinandra conjugensOTAY TARPLANTNative
Deinandra corymbosaNative
Deinandra corymbosa subsp. macrocephala
(Under Deinandra corymbosa)
Synonym
Deinandra fasciculataNative
Deinandra floribundaTECATE TARPLANTNative
Deinandra hallianaHALL'S TARPLANTNative
Deinandra increscensNative
Deinandra increscens subsp. foliosa
(Under Deinandra paniculata)
Synonym
Deinandra increscens subsp. increscensNative
Deinandra increscens subsp. villosaGAVIOTA TARPLANTNative
Deinandra kelloggiiNative
Deinandra lobbiiNative
Deinandra minthorniiSANTA SUSANA TARPLANTNative
Deinandra mohavensisMOJAVE TARPLANTNative
Deinandra pallidaNative
Deinandra paniculataPANICULATE TARPLANTNative
Deinandra pentactisNative
DelaireaCAPE IVY, GERMAN IVY
Delairea odorataNaturalized
Delosperma
Delosperma litoraleNaturalized
Delphinium
  ↳  Key to Delphinium
LARKSPUR
Delphinium amabile
(Under Delphinium parishii subsp. parishii)
Synonym
Delphinium amabile subsp. apachense
(Under Delphinium parishii subsp. parishii)
Synonym
Delphinium andersoniiANDERSON'S LARKSPURNative
Delphinium andersonii subsp. cognatum
(Under Delphinium andersonii)
Synonym
Delphinium andersonii var. scaposum
(Under Delphinium scaposum)
Synonym
Delphinium antoninumANTHONY PEAK LARKSPURNative
Delphinium armeniacum
(Under Delphinium nudicaule)
Illegitimate name
Delphinium bakeriBAKER'S LARKSPURNative
Delphinium blochmaniae
(Under Delphinium parryi subsp. blochmaniae)
Synonym
Delphinium californicumNative
Delphinium californicum subsp. californicumCOAST or CALIFORNIA LARKSPURNative
Delphinium californicum subsp. interiusHOSPITAL CANYON LARKSPURNative
Delphinium californicum var. interius
(Under Delphinium californicum subsp. interius)
Synonym
Delphinium cardinaleCARDINAL or SCARLET LARKSPURNative
Delphinium cuyamacae
(Under Delphinium hesperium subsp. cuyamacae)
Synonym
Delphinium cyanoreios
(Under Delphinium depauperatum)
Synonym
Delphinium decorumNative
Delphinium decorum subsp. decorumCOAST LARKSPURNative
Delphinium decorum subsp. tracyiTRACY'S LARKSPURNative
Delphinium decorum var. nevadense
(Under Delphinium andersonii)
Synonym
Delphinium decorum var. patens
(Under Delphinium patens subsp. patens)
Synonym
Delphinium depauperatumDWARF, BLUE MOUNTAIN, or MOUNTAIN LARKSPURNative
Delphinium diversifolium
(Under Delphinium depauperatum)
Synonym
Delphinium diversifolium subsp. harneyense
(Under Delphinium depauperatum)
Synonym
Delphinium emiliae
(Under Delphinium variegatum subsp. variegatum)
Synonym
Delphinium glaucumMOUNTAIN, GIANT, or TALL LARKSPURNative
Delphinium gracilentumSLENDER or GREENE'S LARKSPURNative
Delphinium gypsophilumGYPSUM-LOVING LARKSPURNative
Delphinium gypsophilum subsp. gypsophilum
(Under Delphinium gypsophilum)
Synonym
Delphinium gypsophilum subsp. parviflorum
(Under Delphinium gypsophilum)
Synonym
Delphinium hanseniiNative
Delphinium hansenii subsp. arcuatum
(Under Delphinium hansenii subsp. hansenii)
Synonym
Delphinium hansenii subsp. ewanianumEWAN'S LARKSPURNative
Delphinium hansenii subsp. hanseniiHANSEN'S LARKSPURNative
Delphinium hansenii subsp. kernenseKERN COUNTY LARKSPURNative
Delphinium hansenii var. arcuatum
(Under Delphinium hansenii subsp. hansenii)
Synonym
Delphinium hansenii var. kernense
(Under Delphinium hansenii subsp. kernense)
Synonym
Delphinium hesperiumNative
Delphinium hesperium f. pallescens
(Under Delphinium hesperium subsp. pallescens)
Synonym
Delphinium hesperium subsp. cuyamacaeCUYAMACA LARKSPURNative
Delphinium hesperium subsp. hesperiumWESTERN LARKSPURNative
Delphinium hesperium subsp. pallescensPALE-FLOWERED WESTERN LARKSPURNative
Delphinium hesperium var. hansenii
(Under Delphinium hansenii subsp. hansenii)
Synonym
Delphinium hesperium var. seditiosum
(Under Delphinium parryi subsp. parryi)
Synonym
Delphinium hutchinsoniaeHUTCHINSON'S LARKSPURNative
Delphinium inopinumUNEXPECTED LARKSPURNative
Delphinium kinkiense
(Under Delphinium variegatum subsp. kinkiense)
Synonym
Delphinium luteumGOLDEN LARKSPURNative
Delphinium nudicauleRED or ORANGE LARKSPURNative
Delphinium nuttallianumDWARF, MEADOW, SLIM, or SONNE'S LARKSPURNative
Delphinium nuttallianum var. fulvum
(Under Delphinium nuttallianum)
Synonym
Delphinium nuttallianum var. levicaule
(Under Delphinium nuttallianum)
Synonym
Delphinium parishiiNative
Delphinium parishii subsp. pallidumPALE-FLOWERED PARISH'S LARKSPURNative
Delphinium parishii subsp. parishiiPARISH'S, DESERT, SKY BLUE, or MOJAVE LARKSPURNative
Delphinium parishii subsp. purpureum
(Under Delphinium parryi subsp. purpureum)
Synonym
Delphinium parishii subsp. subglobosumCOLORADO DESERT LARKSPURNative
Delphinium parishii var. inopinum
(Under Delphinium inopinum)
Synonym
Delphinium parishii var. pallidum
(Under Delphinium parishii subsp. pallidum)
Synonym
Delphinium parryiNative
Delphinium parryi subsp. blochmaniaeDUNE LARKSPURNative
Delphinium parryi subsp. eastwoodiaeEASTWOOD'S LARKSPURNative
Delphinium parryi subsp. maritimumMARITIME LARKSPURNative
Delphinium parryi subsp. parryiPARRY'S LARKSPURNative
Delphinium parryi subsp. purpureumMOUNT PINOS LARKSPURNative
Delphinium parryi subsp. seditiosum
(Under Delphinium parryi subsp. parryi)
Synonym
Delphinium parryi var. maritimum
(Under Delphinium parryi subsp. maritimum)
Synonym
Delphinium parryi var. montanum
(Under Delphinium patens subsp. montanum)
Synonym
Delphinium patensSPREADING or ZIGZAG LARKSPURNative
Delphinium patens subsp. greenei
(Under Delphinium gracilentum)
Synonym
Delphinium patens subsp. hepaticoideumNative
Delphinium patens subsp. montanumNative
Delphinium patens subsp. patensNative
Delphinium pauciflorum
(Under Delphinium nuttallianum)
Illegitimate name
Delphinium polycladonHIGH MOUNTAIN LARKSPURNative
Delphinium pratense
(Under Delphinium gracilentum)
Synonym
Delphinium purpusiiROSE-FLOWERED LARKSPURNative
Delphinium recurvatumRECURVED LARKSPURNative
Delphinium scaposumBARE-STEM LARKSPURNative
Delphinium scopularum var. stachydeum
(Under Delphinium stachydeum)
Synonym
Delphinium scopulorum var. glaucum
(Under Delphinium glaucum)
Synonym
Delphinium scopulorum var. luporum
(Under Delphinium polycladon)
Synonym
Delphinium sonnei
(Under Delphinium nuttallianum)
Synonym
Delphinium splendens
(Under Delphinium glaucum)
Synonym
Delphinium stachydeumSPIKED LARKSPURNative
Delphinium subglobosum
(Under Delphinium parishii subsp. subglobosum)
Synonym
Delphinium trolliifoliumCOW POISON, POISON LARKSPURNative
Delphinium uliginosumSWAMP LARKSPURNative
Delphinium umatillense
(Under Delphinium stachydeum)
Synonym
Delphinium umbraculorumUMBRELLA LARKSPURNative
Delphinium variegatumROYAL LARKSPURNative
Delphinium variegatum subsp. apiculatum
(Under Delphinium variegatum subsp. variegatum)
Synonym
Delphinium variegatum subsp. kinkienseSAN CLEMENTE ISLAND LARKSPURNative
Delphinium variegatum subsp. thorneiTHORNE'S ROYAL LARKSPURNative
Delphinium variegatum subsp. variegatumNative
Delphinium variegatum var. apiculatum
(Under Delphinium variegatum subsp. variegatum)
Synonym
Demidovia tetragonoides
(Under Tetragonia tetragonoides)
Synonym
Dendromecon
  ↳  Key to Dendromecon
TREE POPPY
Dendromecon flexile
(Under Dendromecon harfordii)
Synonym
Dendromecon harfordiiCHANNEL ISLAND TREE POPPYNative
Dendromecon harfordii var. harfordii
(Under Dendromecon harfordii)
Synonym
Dendromecon harfordii var. rhamnoides
(Under Dendromecon harfordii)
Synonym
Dendromecon herbacea
(Under Dendromecon rigida)
Synonym
Dendromecon rhamnoides
(Under Dendromecon harfordii)
Synonym
Dendromecon rigidaBUSH POPPYNative
Dendromecon rigida subsp. harfordii
(Under Dendromecon harfordii)
Synonym
Dendromeda rigida subsp. rhamnoides
(Under Dendromecon harfordii)
Synonym
DennstaedtiaceaeBRACKEN FAMILY
Dentaria californica
(Under Cardamine californica)
Synonym
Dentaria californica var. cardiophylla
(Under Cardamine californica)
Synonym
Dentaria californica var. cuneata
(Under Cardamine californica)
Synonym
Dentaria californica var. integrifolia
(Under Cardamine californica)
Synonym
Dentaria californica var. sinuata
(Under Cardamine californica)
Synonym
Dentaria corymbosa
(Under Cardamine pachystigma)
Illegitimate name
Dentaria corymbosa var. grata
(Under Cardamine pachystigma)
Illegitimate name
Dentaria gemmata
(Under Cardamine nuttallii)
Synonym
Dentaria pachystigma
(Under Cardamine pachystigma)
Synonym
Dentaria pachystigma var. dissectifolia
(Under Cardamine californica)
Synonym
Dentaria tenella var. palmata
(Under Cardamine nuttallii)
Synonym
Deschampsia
  ↳  Key to Deschampsia
HAIR GRASS
Deschampsia atropurpurea
(Under Vahlodea atropurpurea)
Synonym
Deschampsia beringensis
(Under Deschampsia cespitosa subsp. beringensis)
Synonym
Deschampsia cespitosaTUFTED HAIR GRASSNative
Deschampsia cespitosa subsp. beringensisNative
Deschampsia cespitosa subsp. cespitosaNative
Deschampsia cespitosa subsp. holciformisNative
Deschampsia danthonioidesANNUAL HAIR GRASSNative
Deschampsia elongataSLENDER HAIR GRASSNative
Deschampsia holciformis
(Under Deschampsia cespitosa subsp. holciformis)
Synonym
Descurainia
  ↳  Key to Descurainia
TANSY MUSTARD
Descurainia adenophoraNative
Descurainia californicaNative
Descurainia incanaNative
Descurainia incisa subsp. filipes
(Under Descurainia longipedicellata)
Synonym
Descurainia incisa subsp. incisaNative
Descurainia longipedicellataNative
Descurainia nelsoniiNative
Descurainia obtusa subsp. adenophora
(Under Descurainia adenophora)
Synonym
Descurainia paradisaNative
Descurainia paradisa subsp. nevadensis
(Under Descurainia paradisa)
Synonym
Descurainia pinnataNative
Descurainia pinnata subsp. brachycarpaNative
Descurainia pinnata subsp. filipes
(Under Descurainia longipedicellata)
Synonym
Descurainia pinnata subsp. glabraNative
Descurainia pinnata subsp. ochroleucaNative
Descurainia pinnata subsp. paradisa
(Under Descurainia paradisa)
Synonym
Descurainia richardsonii
(Under Descurainia incana)
Illegitimate name
Descurainia richardsonii subsp. incisa
(Under Descurainia incisa subsp. incisa)
Synonym
Descurainia richardsonii subsp. viscosa
(Under Descurainia incana)
Synonym
Descurainia sophiaNaturalized
Desmazeria
Desmazeria rigidaNaturalized
Dianthus
  ↳  Key to Dianthus
CARNATION, PINK
Dianthus armeria subsp. armeriaGRASS PINK, DEPTFORD PINKNaturalized
Dianthus barbatus subsp. barbatusSWEET-WILLIAMNaturalized
Dianthus deltoides subsp. deltoidesMAIDEN PINK, MEADOW PINKNaturalized
Dianthus nudiflorusNaturalized
Dianthus plumarius subsp. plumariusGARDEN or COTTAGE PINKWaif
Dianthus prolifer
(Under Petrorhagia prolifera)
Synonym
Dicentra
  ↳  Key to Dicentra
Dicentra chrysantha
(Under Ehrendorferia chrysantha)
Synonym
Dicentra formosaPACIFIC BLEEDING HEARTNative
Dicentra nevadensisTULARE COUNTY BLEEDING HEARTNative
Dicentra ochroleuca
(Under Ehrendorferia ochroleuca)
Synonym
Dicentra paucifloraNative
Dicentra unifloraSTEER'S HEADNative
Dichanthelium acuminatum
(Under Panicum acuminatum)
Synonym
Dichanthelium acuminatum subsp. fasciculatum
(Under Panicum acuminatum var. fasciculatum)
Synonym
Dichanthelium acuminatum subsp. lindheimeri
(Under Panicum acuminatum var. lindheimeri)
Synonym
Dichanthelium acuminatum subsp. thermale
(Under Panicum acuminatum var. thermale)
Synonym
Dichanthelium lanuginosum var. thermale
(Under Panicum acuminatum var. thermale)
Synonym
Dichanthelium oligosanthes subsp. scribnerianum
(Under Panicum oligosanthes var. scribnerianum)
Synonym
Dichanthelium oligosanthes var. scribnerianum
(Under Panicum oligosanthes var. scribnerianum)
Synonym
Dichelostemma
  ↳  Key to Dichelostemma
Dichelostemma californicum
(Under Dichelostemma volubile)
Synonym
Dichelostemma capitatum
(Under Dipterostemon capitatus)
Synonym
Dichelostemma capitatum subsp. lacuna-vernalis
(Under Dipterostemon capitatus subsp. lacuna-vernalis)
Synonym
Dichelostemma capitatum subsp. pauciflorum
(Under Dipterostemon capitatus subsp. pauciflorus)
Synonym
Dichelostemma congestumFORK-TOOTHED OOKOWNative
Dichelostemma ida-maiaFIRECRACKER FLOWERNative
Dichelostemma insulare
(Under Dipterostemon capitatus subsp. capitatus)
Synonym
Dichelostemma lacuna-vernalis
(Under Dipterostemon capitatus subsp. lacuna-vernalis)
Synonym
Dichelostemma multiflorumWILD HYACINTHNative
Dichelostemma parviflorum
(Under Dichelostemma multiflorum)
Synonym
Dichelostemma pauciflorum
(Under Dipterostemon capitatus subsp. pauciflorus)
Synonym
Dichelostemma pulchellum
(Under Dipterostemon capitatus)
Synonym
Dichelostemma pulchellum var. pauciflorum
(Under Dipterostemon capitatus subsp. pauciflorus)
Synonym
Dichelostemma volubileTWINING BRODIAEA, SNAKE LILYNative
Dichondra
  ↳  Key to Dichondra
Dichondra donellianaNative
Dichondra micranthaNaturalized
Dichondra occidentalisWESTERN DICHONDRANative
Dicoria
Dicoria canescensNative
Dicoria canescens subsp. clarkiae
(Under Dicoria canescens)
Synonym
Dicoria canescens subsp. hispidula
(Under Dicoria canescens)
Synonym
Dicranostegia
Dicranostegia orcuttianaORCUTT'S BIRD'S-BEAK, BAJA BIRD'S-BEAKNative
Dieteria
  ↳  Key to Dieteria
Dieteria asteroidesNative
Dieteria asteroides var. asteroidesNative
Dieteria asteroides var. lagunensisMOUNT LAGUNA ASTERNative
Dieteria canescensHOARY-ASTERNative
Dieteria canescens var. canescensNative
Dieteria canescens var. incanaNative
Dieteria canescens var. leucanthemifoliaNative
Dieteria canescens var. shastensisNative
Dieteria canescens var. ziegleriZIEGLER'S ASTERNative
Dieteria shastensis
(Under Dieteria canescens var. shastensis)
Synonym
DigitalisFOXGLOVE
Digitalis purpureaNaturalized
Digitaria
  ↳  Key to Digitaria
CRAB GRASS
Digitaria californica var. californicaARIZONA COTTONTOPNative
Digitaria ciliaris var. ciliarisSOUTHERN CRAB GRASSNaturalized
Digitaria ischaemumSMOOTH CRAB GRASSNaturalized
Digitaria sanguinalisHAIRY CRAB GRASSNaturalized
Digitaria sanguinalis var. ciliaris
(Under Digitaria ciliaris var. ciliaris)
Synonym
Dimeresia
Dimeresia howelliiDOUBLETNative
Dimorphotheca
  ↳  Key to Dimorphotheca
Dimorphotheca ecklonisBLUE & WHITE DAISYBUSHNaturalized
Dimorphotheca fruticosaTRAILING AFRICAN DAISYNaturalized
Dimorphotheca sinuataNAMAQUALAND DAISYNaturalized
DiodiaBUTTONWEED
Diodia teresROUGH BUTTONWEED, POOR JOEWaif
Diodia teres var. teres
(Under Diodia teres)
Synonym
DiospyrosPERSIMMON, EBONY
Diospyros virginianaCOMMON PERSIMMON, POSSUMWOODNaturalized
Diplacus
  ↳  Key to Diplacus
MONKEYFLOWER
Diplacus angustatusPURPLELIP PANSY MONKEYFLOWERNative
Diplacus arachnoideus
(Under Diplacus longiflorus)
Synonym
Diplacus aridusLOW BUSH MONKEYFLOWERNative
Diplacus aurantiacusORANGE BUSH MONKEYFLOWERNative
Diplacus australisNative
Diplacus australis
(Under Diplacus australis)
Illegitimate name
Diplacus bicolorHARLEQUIN MONKEYFLOWERNative
Diplacus bigeloviiBIGELOW'S MONKEYFLOWERNative
Diplacus bigelovii var. bigeloviiNative
Diplacus bigelovii var. cuspidatusNative
Diplacus bolanderiBOLANDER'S MONKEYFLOWERNative
Diplacus brandegeeiSANTA CRUZ ISLAND MONKEYFLOWERNative
Diplacus brevipesWIDE-THROAT YELLOW MONKEYFLOWERNative
Diplacus calycinusROCK BUSH MONKEYFLOWERNative
Diplacus clevelandiiCLEVELAND'S BUSH MONKEYFLOWERNative
Diplacus compactusCOMPACT MONKEYFLOWERNative
Diplacus congdoniiNative
Diplacus constrictusDENSE-FRUITED MONKEYFLOWERNative
Diplacus cusickioidesNative
Diplacus douglasiiPURPLE MOUSE EARSNative
Diplacus fasciculatus
(Under Diplacus linearis)
Synonym
Diplacus fremontiiNative
Diplacus glutinosus var. grandiflorus
(Under Diplacus grandiflorus)
Synonym
Diplacus grandiflorusNative
Diplacus grandiflorus
(Under Diplacus grandiflorus)
Illegitimate name
Diplacus graniticolaGRANITE-CRACK MONKEYFLOWERNative
Diplacus jepsoniiNative
Diplacus johnstoniiJOHNSTON'S MONKEYFLOWERNative
Diplacus kelloggiiKELLOGG'S MONKEYFLOWERNative
Diplacus layneaeLAYNE'S MONKEYFLOWERNative
Diplacus leptaleusLEAST FLOWERED MONKEYFLOWERNative
Diplacus linearisMONTEREY MONKEYFLOWERNative
Diplacus longiflorusNative
Diplacus longiflorus var. linearis
(Under Diplacus linearis)
Synonym
Diplacus mephiticusSKUNKY MONKEYFLOWERNative
Diplacus mohavensisMOJAVE MONKEYFLOWERNative
Diplacus nanusDWARF MONKEYFLOWERNative
Diplacus parryiPARRY'S MONKEYFLOWERNative
Diplacus parviflorusISLAND BUSH MONKEYFLOWERNative
Diplacus pictusCALICO MONKEYFLOWERNative
Diplacus pulchellusYELLOW-LIP PANSY MONKEYFLOWERNative
Diplacus puniceusRED BUSH MONKEYFLOWERNative
Diplacus pygmaeusEGG LAKE MONKEYFLOWERNative
Diplacus rattaniiNative
Diplacus rupicolaDEATH VALLEY MONKEYFLOWERNative
Diplacus rutilus
(Under Diplacus longiflorus)
Synonym
Diplacus speciosus
(Under Diplacus longiflorus)
Synonym
Diplacus thompsoniiTHOMPSON'S MONKEYFLOWERNative
Diplacus torreyiNative
Diplacus traskiaeSANTA CATALINA ISLAND MONKEYFLOWERNative
Diplacus tricolorNative
Diplacus vandenbergensisVANDENBERG MONKEYFLOWERNative
Diplacus viscidusNative
Diplotaxis
  ↳  Key to Diplotaxis
WALL ROCKET
Diplotaxis muralisNaturalized
Diplotaxis tenuifoliaNaturalized
Dipsacaceae
  ↳  Key to Dipsacaceae
TEASEL FAMILY
Dipsacus
  ↳  Key to Dipsacus
TEASEL
Dipsacus fullonumWILD TEASELNaturalized
Dipsacus sativusFULLER'S TEASELNaturalized
Dipsacus sylvestris
(Under Dipsacus fullonum)
Synonym
Dipterostemon
  ↳  Key to Dipterostemon
Dipterostemon capitatusBLUE DICKSNative
Dipterostemon capitatus subsp. capitatusNative
Dipterostemon capitatus subsp. lacuna-vernalisVERNAL POOL BLUE DICKSNative
Dipterostemon capitatus subsp. pauciflorusNative
Dipterostemon insularis
(Under Dipterostemon capitatus subsp. capitatus)
Synonym
Dipterostemon pauciflorus
(Under Dipterostemon capitatus subsp. pauciflorus)
Synonym
DircaLEATHERWOOD
Dirca occidentalisWESTERN LEATHERWOODNative
Disporum hookeri
(Under Prosartes hookeri)
Synonym
Disporum hookeri var. parvifolium
(Under Prosartes parvifolia)
Synonym
Disporum hookeri var. trachyandrum
(Under Prosartes hookeri)
Synonym
Disporum parvifolium
(Under Prosartes parvifolia)
Synonym
Disporum smithii
(Under Prosartes smithii)
Synonym
Dissanthelium
Dissanthelium californicumCALIFORNIA DISSANTHELIUMNative
Distichlis
  ↳  Key to Distichlis
Distichlis littoralisSHORE GRASSNative
Distichlis spicataSALT GRASSNative
Distichlis spicata var. divaricata
(Under Distichlis spicata)
Synonym
Distichlis spicata var. nana
(Under Distichlis spicata)
Synonym
Distichlis spicata var. stolonifera
(Under Distichlis spicata)
Synonym
Distichlis spicata var. stricta
(Under Distichlis spicata)
Synonym
Ditaxis
  ↳  Key to Ditaxis
Ditaxis adenophora
(Under Ditaxis claryana)
Misapplied name
Ditaxis californica
(Under Ditaxis serrata var. californica)
Synonym
Ditaxis clariana
(Under Ditaxis claryana)
Orthographic variant
Ditaxis claryanaGLANDULAR DITAXISNative
Ditaxis lanceolataNative
Ditaxis neomexicanaNative
Ditaxis serrataNative
Ditaxis serrata var. californicaCALIFORNIA DITAXISNative
Ditaxis serrata var. serrataNative
Dithyrea
  ↳  Key to Dithyrea
SPECTACLEPOD
Dithyrea californicaNative
Dithyrea maritimaBEACH SPECTACLEPODNative
Dittrichia
  ↳  Key to Dittrichia
Dittrichia graveolensSTINKWORTNaturalized
Dittrichia viscosaFALSE YELLOWHEADNaturalized
Dodecahema
Dodecahema leptocerasSLENDER-HORNED SPINEFLOWERNative
Dodecatheon alpinum
(Under Primula tetrandra)
Synonym
Dodecatheon alpinum subsp. alpinum
(Under Primula tetrandra)
Synonym
Dodecatheon alpinum subsp. majus
(Under Primula tetrandra)
Synonym
Dodecatheon clevelandii
(Under Primula clevelandii)
Synonym
Dodecatheon clevelandii subsp. clevelandii
(Under Primula clevelandii var. clevelandii)
Synonym
Dodecatheon clevelandii subsp. insulare
(Under Primula clevelandii var. insularis)
Synonym
Dodecatheon clevelandii subsp. patulum
(Under Primula clevelandii var. patula)
Synonym
Dodecatheon clevelandii subsp. sanctarum
(Under Primula clevelandii var. gracilis)
Synonym
Dodecatheon clevelandii var. gracile
(Under Primula clevelandii var. gracilis)
Synonym
Dodecatheon clevelandii var. patulum
(Under Primula clevelandii var. patula)
Synonym
Dodecatheon conjugens
(Under Primula conjugens)
Synonym
Dodecatheon conjugens subsp. conjugens
(Under Primula conjugens)
Synonym
Dodecatheon hansenii
(Under Primula hendersonii)
Synonym
Dodecatheon hendersonii
(Under Primula hendersonii)
Synonym
Dodecatheon hendersonii subsp. cruciatum
(Under Primula hendersonii)
Synonym
Dodecatheon hendersonii subsp. hansenii
(Under Primula hendersonii)
Synonym
Dodecatheon hendersonii subsp. hendersonii
(Under Primula hendersonii)
Synonym
Dodecatheon hendersonii subsp. parvifolium
(Under Primula hendersonii)
Synonym
Dodecatheon hendersonii var. yosemitanum
(Under Primula subalpina)
Synonym
Dodecatheon jeffreyi
(Under Primula jeffreyi)
Synonym
Dodecatheon jeffreyi f. pygmaeum
(Under Primula jeffreyi)
Synonym
Dodecatheon jeffreyi subsp. jeffreyi
(Under Primula jeffreyi)
Synonym
Dodecatheon jeffreyi subsp. pygmaeum
(Under Primula jeffreyi)
Synonym
Dodecatheon jeffreyi var. alpinum
(Under Primula tetrandra)
Synonym
Dodecatheon pulchellum
(Under Primula pauciflora)
Synonym
Dodecatheon pulchellum subsp. monanthum
(Under Primula pauciflora)
Synonym ined.
Dodecatheon pulchellum var. monanthum
(Under Primula pauciflora)
Synonym
Dodecatheon pulchellum var. shoshonense
(Under Primula pauciflora)
Synonym
Dodecatheon redolens
(Under Primula fragrans)
Synonym
Dodecatheon subalpinum
(Under Primula subalpina)
Synonym
Dodecatheon tetrandrum
(Under Primula tetrandra)
Synonym
Doellingeria
  ↳  Key to Doellingeria
ASTER
Doellingeria breweriNative
Doellingeria engelmanniiNative
Doellingeria glabrataSISKIYOU ASTERNative
Doellingeria ledophylla var. covilleiNative
Doellingeria tomentellaBRICKELLBUSH ASTERNative
Dopatrium
Dopatrium junceumNaturalized
Downingia
  ↳  Key to Downingia
Downingia bacigalupiiNative
Downingia bellaNative
Downingia bicornutaNative
Downingia bicornuta var. bicornutaNative
Downingia bicornuta var. pictaNative
Downingia brachyantha
(Under Downingia laeta)
Synonym
Downingia concolorNative
Downingia concolor var. breviorCUYAMACA LAKE DOWNINGIANative
Downingia concolor var. concolorNative
Downingia concolor var. tricolor
(Under Downingia concolor var. concolor)
Synonym
Downingia cuspidataNative
Downingia elegansNative
Downingia elegans var. brachypetala
(Under Downingia elegans)
Synonym
Downingia elegans var. corymbosa
(Under Downingia elegans)
Synonym
Downingia elegans var. elegans
(Under Downingia elegans)
Synonym
Downingia humilis
(Under Downingia pusilla)
Synonym
Downingia immaculata
(Under Downingia cuspidata)
Synonym
Downingia insignisNative
Downingia laetaGREAT BASIN DOWNINGIANative
Downingia mirabilis
(Under Downingia ornatissima var. mirabilis)
Synonym
Downingia mirabilis var. eximia
(Under Downingia ornatissima var. mirabilis)
Synonym
Downingia montanaNative
Downingia ornatissimaNative
Downingia ornatissima var. eximia
(Under Downingia ornatissima var. mirabilis)
Synonym
Downingia ornatissima var. mirabilisNative
Downingia ornatissima var. ornatissimaNative
Downingia pulchellaNative
Downingia pulcherrimaNative
Downingia pusillaDWARF DOWNINGIANative
Downingia tricolor
(Under Downingia concolor var. concolor)
Synonym
Downingia willamettensisNative
Downingia yinaPossibly in ca
Downingia yina var. major
(Under Downingia pulcherrima)
Synonym, in part
Downingia yina var. major
(Under Downingia willamettensis)
Synonym, in part
Downingia yina var. yina
(Under Downingia yina)
Synonym
Draba
  ↳  Key to Draba
Draba albertinaNative
Draba asterophoraNative
Draba asterophora var. asterophora
(Under Draba asterophora)
Synonym
Draba asterophora var. macrocarpa
(Under Draba asterophora)
Synonym
Draba aureolaGOLDEN ALPINE DRABANative
Draba breweriNative
Draba breweri var. cana
(Under Draba cana)
Synonym
Draba breweri var. sublaxa
(Under Draba breweri)
Synonym
Draba californicaCALIFORNIA DRABANative
Draba canaCANESCENT DRABANative
Draba carnosulaMOUNT EDDY DRABANative
Draba corrugataNative
Draba corrugata f. vestita
(Under Draba corrugata)
Synonym
Draba corrugata var. saxosa
(Under Draba saxosa)
Synonym
Draba crassifolia var. albertina
(Under Draba albertina)
Synonym
Draba crassifolia var. nevadensis
(Under Draba albertina)
Synonym
Draba cruciataMINERAL KING DRABANative
Draba cruciata var. integrifolia
(Under Draba sharsmithii)
Synonym
Draba cuneifoliaNative
Draba cuneifolia var. californica
(Under Draba californica)
Synonym
Draba cuneifolia var. cuneifolia
(Under Draba cuneifolia)
Synonym
Draba cuneifolia var. integrifolia
(Under Draba cuneifolia)
Synonym
Draba cuneifolia var. sonorae
(Under Draba cuneifolia)
Synonym
Draba densifoliaNative
Draba douglasii var. crockeri
(Under Cusickiella douglasii)
Synonym
Draba eurycarpa
(Under Anelsonia eurycarpa)
Synonym
Draba howelliiHOWELL'S DRABANative
Draba howellii var. carnosula
(Under Draba carnosula)
Synonym
Draba incrassataSWEETWATER MOUNTAINS DRABANative
Draba lemmoniiNative
Draba lemmonii
(Under Draba longisquamosa)
Synonym, in part
Draba lemmonii var. incrassata
(Under Draba incrassata)
Synonym
Draba lemmonii var. lemmonii
(Under Draba lemmonii)
Synonym
Draba lonchocarpaSPEAR-FRUITED DRABANative
Draba lonchocarpa var. lonchocarpa
(Under Draba lonchocarpa)
Synonym
Draba longisquamosaNative
Draba micrantha
(Under Draba reptans)
Synonym
Draba monoensisWHITE MOUNTAINS DRABANative
Draba nemorosaWaif
Draba nivalis var. elongata
(Under Draba lonchocarpa)
Synonym
Draba novolympicaNative
Draba oligospermaNative
Draba oligosperma var. pectinata
(Under Draba densifolia)
Synonym
Draba paysonii var. treleasei
(Under Draba novolympica)
Synonym
Draba praealtaTALL DRABANative
Draba pterospermaWINGED-SEED DRABANative
Draba quadricostata
(Under Cusickiella quadricostata)
Synonym
Draba reptansWaif
Draba saxosaSOUTHERN CALIFORNIA ROCK DRABANative
Draba sharsmithiiMOUNT WHITNEY DRABANative
Draba sierraeSIERRA DRABANative
Draba stenoloba var. nana
(Under Draba albertina)
Synonym
Draba stenoloba var. ramosa
(Under Draba albertina)
Synonym
Draba subumbellataMOUND DRABANative
Draba unilateralis
(Under Athysanus unilateralis)
Synonym
Draba vernaNaturalized
Draba verna var. verna
(Under Draba verna)
Synonym
Draba vestita
(Under Draba corrugata)
Synonym
Draperia
Draperia systylaNative
Draperia systyla var. minor
(Under Draperia systyla)
Synonym
Drosanthemum
Drosanthemum floribundumNaturalized
Drosera
  ↳  Key to Drosera
SUNDEW
Drosera anglicaENGLISH SUNDEWNative
Drosera longifolia
(Under Drosera anglica)
Synonym
Drosera rotundifoliaROUND-LEAVED SUNDEWNative
DroseraceaeSUNDEW FAMILY
Drymocallis
  ↳  Key to Drymocallis
Drymocallis cuneifoliaNative
Drymocallis cuneifolia var. cuneifoliaWEDGELEAF WOODBEAUTYNative
Drymocallis cuneifolia var. ewaniiEWAN'S WOODBEAUTYNative
Drymocallis glandulosaNative
Drymocallis glandulosa var. glandulosaNative
Drymocallis glandulosa var. reflexaNative
Drymocallis glandulosa var. viscidaNative
Drymocallis glandulosa var. wrangellianaNative
Drymocallis hanseniiYOSEMITE WOODBEAUTYNative
Drymocallis lacteaNative
Drymocallis lactea var. austiniaeAUSTIN'S WOODBEAUTYNative
Drymocallis lactea var. lacteaSIERRAN WOODBEAUTYNative
Drymocallis pseudorupestrisNative
Drymocallis pseudorupestris var. crumianaCRUM'S WOODBEAUTYNative
Drymocallis pseudorupestris var. saxicolaCLIFF WOODBEAUTYNative
Drymocallis rhomboideaNative
Dryopteridaceae
  ↳  Key to Dryopteridaceae
WOOD FERN FAMILY
Dryopteris
  ↳  Key to Dryopteris
WOOD FERN
Dryopteris argutaNative
Dryopteris assimilis
(Under Dryopteris expansa)
Synonym
Dryopteris expansaNative
Dryopteris filix-masMALE FERNNative
Duchesnea
Duchesnea indica var. indicaMOCK-STRAWBERRYNaturalized
Dudleya
  ↳  Key to Dudleya
DUDLEYA, LIVEFOREVER
Dudleya abramsiiNative
Dudleya abramsii subsp. abramsiiNative
Dudleya abramsii subsp. affinisSAN BERNARDINO MOUNTAINS DUDLEYANative
Dudleya abramsii subsp. bettinaeBETTY'S DUDLEYANative
Dudleya abramsii subsp. calcicolaLIMESTONE DUDLEYANative
Dudleya abramsii subsp. costifolia
(Under Dudleya cymosa subsp. costifolia)
Synonym
Dudleya abramsii subsp. murinaMOUSE-GRAY DUDLEYANative
Dudleya abramsii subsp. parva
(Under Dudleya parva)
Synonym
Dudleya abramsii subsp. setchelliiSANTA CLARA VALLEY DUDLEYANative
Dudleya alainae
(Under Dudleya saxosa subsp. aloides)
Synonym
Dudleya arizonicaNative
Dudleya attenuata subsp. attenuata
(Under Dudleya attenuata subsp. orcuttii)
Misapplied name
Dudleya attenuata subsp. orcuttiiNative
Dudleya bettinae
(Under Dudleya abramsii subsp. bettinae)
Synonym
Dudleya blochmaniaeNative
Dudleya blochmaniae subsp. blochmaniaeBLOCHMAN'S DUDLEYANative
Dudleya blochmaniae subsp. brevifolia
(Under Dudleya brevifolia)
Synonym
Dudleya blochmaniae subsp. insularisSANTA ROSA ISLAND DUDLEYANative
Dudleya brevifoliaSHORTLEAVED DUDLEYANative
Dudleya caespitosaNative
Dudleya calcicola
(Under Dudleya abramsii subsp. calcicola)
Synonym
Dudleya candelabrumCANDLEHOLDER DUDLEYANative
Dudleya cespitosa
(Under Dudleya caespitosa)
Orthographic variant
Dudleya cymosaNative
Dudleya cymosa subsp. agourensisAGOURA HILLS DUDLEYANative
Dudleya cymosa subsp. costafolia
(Under Dudleya cymosa subsp. costifolia)
Orthographic variant
Dudleya cymosa subsp. costifoliaPIERPOINT SPRINGS DUDLEYANative
Dudleya cymosa subsp. crebrifoliaSAN GABRIEL RIVER DUDLEYANative
Dudleya cymosa subsp. cymosaNative
Dudleya cymosa subsp. gigantea
(Under Dudleya cymosa subsp. cymosa)
Synonym
Dudleya cymosa subsp. marcescensMARCESCENT DUDLEYANative
Dudleya cymosa subsp. minor
(Under Dudleya lanceolata)
Synonym
Dudleya cymosa subsp. ovatifoliaSANTA MONICA DUDLEYANative
Dudleya cymosa subsp. paniculataNative
Dudleya cymosa subsp. pumilaNative
Dudleya densifloraSAN GABRIEL MOUNTAINS DUDLEYANative
Dudleya edulisNative
Dudleya elongata
(Under Dudleya lanceolata)
Synonym
Dudleya farinosaBLUFF LETTUCENative
Dudleya gnomaMUNCHKIN DUDLEYANative
Dudleya goldmanii
(Under Dudleya cymosa subsp. pumila)
Synonym
Dudleya greeneiGREENE'S DUDLEYANative
Dudleya hassei
(Under Dudleya virens subsp. hassei)
Synonym
Dudleya hoffmannii
(Under Dudleya greenei)
Synonym
Dudleya lanceolataLANCE-LEAVED DUDLEYANative
Dudleya multicaulisMANY-STEMMED DUDLEYANative
Dudleya nesioticaSANTA CRUZ ISLAND DUDLEYANative
Dudleya palmeriPALMER'S DUDLEYANative
Dudleya parvaCONEJO DUDLEYANative
Dudleya pulverulentaCHALK DUDLEYANative
Dudleya pulverulenta subsp. arizonica
(Under Dudleya arizonica)
Synonym
Dudleya pulverulenta subsp. pulverulenta
(Under Dudleya pulverulenta)
Synonym
Dudleya pumila
(Under Dudleya cymosa subsp. pumila)
Synonym
Dudleya regalis
(Under Dudleya greenei)
Synonym
Dudleya saxosaNative
Dudleya saxosa subsp. aloidesNative
Dudleya saxosa subsp. saxosaPANAMINT DUDLEYANative
Dudleya setchellii
(Under Dudleya abramsii subsp. setchellii)
Synonym
Dudleya stoloniferaLAGUNA BEACH DUDLEYANative
Dudleya traskiaeSANTA BARBARA ISLAND DUDLEYANative
Dudleya variegataVARIEGATED DUDLEYANative
Dudleya verityiVERITY'S DUDLEYANative
Dudleya virensNative
Dudleya virens subsp. hasseiNative
Dudleya virens subsp. insularisISLAND GREEN DUDLEYANative
Dudleya virens subsp. virensBRIGHT GREEN DUDLEYANative
Dudleya viscidaSTICKY DUDLEYANative
Dugaldia grandiflora
(Under Helenium bolanderi)
Synonym
Dugaldia hoopesii
(Under Hymenoxys hoopesii)
Synonym
Dulichium
Dulichium arundinaceum var. arundinaceumTHREE-WAY SEDGENative
Dysphania
  ↳  Key to Dysphania
MEXICAN TEA, WORMWOOD
Dysphania ambrosioidesMEXICAN TEANaturalized
Dysphania anthelminticaWORMSEEDNaturalized
Dysphania botrysJERUSALEM OAKNaturalized
Dysphania chilensisNaturalized
Dysphania multifidaNaturalized
Dysphania pumilioNaturalized
Dyssodia
Dyssodia cooperi
(Under Adenophyllum cooperi)
Synonym
Dyssodia papposaDOGWEEDWaif
Dyssodia porophylloides
(Under Adenophyllum porophylloides)
Synonym
EastwoodiaYELLOW MOCK ASTER
Eastwoodia elegansNative
Eatonella
Eatonella congdonii
(Under Monolopia congdonii)
Synonym
Eatonella niveaNative
EbenaceaeEBONY FAMILY
Eburophyton austiniae
(Under Cephalanthera austiniae)
Synonym
Echeveria brittonii
(Under Sedum obtusatum)
Synonym
Echeveria lanceolata var. composta
(Under Dudleya lanceolata)
Synonym
Echeveria lanceolata var. incerta
(Under Dudleya lanceolata)
Synonym
Echeveria obtusata
(Under Sedum obtusatum)
Synonym
EchinocactusCLUSTERED BARREL CACTUS
Echinocactus cylindraceus
(Under Ferocactus cylindraceus)
Synonym
Echinocactus johnsonii
(Under Sclerocactus johnsonii)
Synonym
Echinocactus polyancistrus
(Under Sclerocactus polyancistrus)
Synonym
Echinocactus polycephalus var. polycephalusNative
Echinocereus
  ↳  Key to Echinocereus
HEDGEHOG CACTUS
Echinocereus engelmanniiNative
Echinocereus engelmannii var. munzii
(Under Echinocereus engelmannii)
Synonym
Echinocereus mojavensisNative
Echinocereus munzii
(Under Echinocereus engelmannii)
Synonym
Echinocereus triglochidiatus
(Under Echinocereus mojavensis)
Synonym
Echinocereus triglochidiatus var. mojavensis
(Under Echinocereus mojavensis)
Synonym
Echinochloa
  ↳  Key to Echinochloa
BARNYARD GRASS
Echinochloa colonaNaturalized
Echinochloa colonum
(Under Echinochloa colona)
Orthographic variant
Echinochloa crus-galliNaturalized
Echinochloa crus-galli subsp. spiralis
(Under Echinochloa crus-galli)
Synonym
Echinochloa crus-galli var. zelayensis
(Under Echinochloa crus-galli)
Synonym
Echinochloa crus-pavonis var. crus-pavonisNaturalized
Echinochloa esculentaWaif
Echinochloa frumentacea
(Under Echinochloa esculenta)
Misapplied name
Echinochloa muricata var. microstachyaNative
Echinochloa oryzicolaAgricultural weed
Echinochloa oryzoidesNaturalized
Echinochloa phyllopogon
(Under Echinochloa oryzicola)
Noted name
Echinochloa phyllopogon
(Under Echinochloa oryzoides)
Synonym
EchinodorusBURHEAD
Echinodorus berteroiNative
Echinodorus berteroi var. lanceolatus
(Under Echinodorus berteroi)
Synonym
Echinodorus rostratus
(Under Echinodorus berteroi)
Synonym
Echinomastus johnsonii
(Under Sclerocactus johnsonii)
Synonym
EchinopsGLOBE THISTLE
Echinops sphaerocephalusWaif
Echium
  ↳  Key to Echium
Echium candicansPRIDE OF MADEIRANaturalized
Echium pininanaTOWER OF JEWELSNaturalized
Echium plantagineumSALVATION JANENaturalized
Eclipta
Eclipta alba
(Under Eclipta prostrata)
Synonym
Eclipta prostrataFALSE DAISYNative
Ectosperma alexandrae
(Under Swallenia alexandrae)
Synonym
Edwinia californica
(Under Jamesia americana var. rosea)
Synonym
EgeriaBRAZILIAN WATERWEED
Egeria densaNaturalized
Ehrendorferia
  ↳  Key to Ehrendorferia
Ehrendorferia chrysanthaGOLDEN EARDROPSNative
Ehrendorferia ochroleucaWHITE EARDROPSNative
EhretiaceaeEHRETIA FAMILY
Ehrharta
  ↳  Key to Ehrharta
VELDT GRASS
Ehrharta calycinaPERENNIAL VELDT GRASSNaturalized
Ehrharta erectaPANIC VELDT GRASSNaturalized
Ehrharta longifloraLONG-FLOWERED VELDT GRASS, ANNUAL VELDT GRASSNaturalized
EichhorniaWATER HYACINTH
Eichhornia crassipesNaturalized
Elaeagnaceae
  ↳  Key to Elaeagnaceae
OLEASTER FAMILY
Elaeagnus
Elaeagnus angustifoliaRUSSIAN OLIVENaturalized
Elaeagnus angustifolius
(Under Elaeagnus angustifolia)
Orthographic variant
Elaterium bigelovii
(Under Brandegea bigelovii)
Synonym
Elatinaceae
  ↳  Key to Elatinaceae
WATERWORT FAMILY
Elatine
  ↳  Key to Elatine
WATERWORT
Elatine ambiguaNaturalized
Elatine brachyspermaNative
Elatine californicaNative
Elatine chilensisNative
Elatine gracilis
(Under Elatine chilensis)
Synonym
Elatine heterandraNative
Elatine obovata
(Under Elatine brachysperma)
Synonym
Elatine rubellaNative
Eleocharis
  ↳  Key to Eleocharis
SPIKERUSH
Eleocharis acicularisNEEDLE SPIKERUSHNative
Eleocharis acicularis var. acicularisNative
Eleocharis acicularis var. bella
(Under Eleocharis bella)
Synonym
Eleocharis acicularis var. gracilescensNative
Eleocharis acicularis var. occidentalisNative
Eleocharis acicularis var. radicans
(Under Eleocharis radicans)
Synonym
Eleocharis acicularis var. submersa
(Under Eleocharis acicularis var. acicularis)
Synonym
Eleocharis arenicola
(Under Eleocharis montevidensis)
Synonym
Eleocharis atropurpureaNative
Eleocharis bellaNative
Eleocharis bernardinaNative
Eleocharis bolanderiNative
Eleocharis capitata
(Under Eleocharis geniculata)
Synonym
Eleocharis caribaea
(Under Eleocharis geniculata)
Synonym
Eleocharis coloradoensisNative
Eleocharis decumbensNative
Eleocharis disciformis
(Under Eleocharis parishii)
Synonym
Eleocharis dispar
(Under Eleocharis geniculata)
Synonym
Eleocharis engelmanniiNative
Eleocharis engelmannii var. detonsaNative
Eleocharis engelmannii var. engelmanniiNative
Eleocharis flavescens var. flavescensNative
Eleocharis flavescens var. thermalis
(Under Eleocharis flavescens var. flavescens)
Synonym
Eleocharis geniculataNative
Eleocharis leptos var. coloradoensis
(Under Eleocharis coloradoensis)
Synonym
Eleocharis lindheimeri
(Under Eleocharis radicans)
Synonym
Eleocharis macrostachyaNative
Eleocharis montana subsp. montevidensis
(Under Eleocharis montevidensis)
Synonym
Eleocharis montevidensisNative
Eleocharis montevidensis var. bolanderi
(Under Eleocharis bolanderi)
Synonym
Eleocharis montevidensis var. decumbens
(Under Eleocharis decumbens)
Synonym
Eleocharis montevidensis var. parishii
(Under Eleocharis parishii)
Synonym
Eleocharis obtusaNative
Eleocharis obtusa var. ellipsoidalis
(Under Eleocharis obtusa)
Synonym
Eleocharis obtusa var. engelmannii
(Under Eleocharis engelmannii)
Synonym
Eleocharis obtusa var. gigantea
(Under Eleocharis obtusa)
Synonym
Eleocharis obtusa var. jejuna
(Under Eleocharis obtusa)
Synonym
Eleocharis obtusa var. ovata
(Under Eleocharis ovata)
Synonym
Eleocharis obtusa var. peasei
(Under Eleocharis obtusa)
Synonym
Eleocharis ovataNative
Eleocharis ovata var. detonsa
(Under Eleocharis engelmannii var. detonsa)
Synonym
Eleocharis ovata var. heuseri
(Under Eleocharis ovata)
Synonym
Eleocharis pachycarpaNaturalized
Eleocharis palmeri
(Under Eleocharis montevidensis)
Synonym
Eleocharis palustrisNative
Eleocharis parishiiNative
Eleocharis parvulaSMALL SPIKERUSHNative
Eleocharis parvula var. anachaeta
(Under Eleocharis coloradoensis)
Synonym
Eleocharis parvula var. coloradoensis
(Under Eleocharis coloradoensis)
Synonym
Eleocharis pauciflora
(Under Eleocharis quinqueflora)
Synonym
Eleocharis pauciflora var. bernardina
(Under Eleocharis bernardina)
Synonym
Eleocharis pauciflora var. fernaldii
(Under Eleocharis quinqueflora)
Synonym
Eleocharis pauciflora var. suksdorfiana
(Under Eleocharis suksdorfiana)
Synonym
Eleocharis perlonga
(Under Eleocharis macrostachya)
Synonym
Eleocharis pygmaea
(Under Eleocharis parvula)
Synonym
Eleocharis quadrangulataSQUARESTEM SPIKERUSHNaturalized
Eleocharis quadrangulata var. crassior
(Under Eleocharis quadrangulata)
Synonym
Eleocharis quinquefloraNative
Eleocharis quinqueflora subsp. fernaldii
(Under Eleocharis quinqueflora)
Synonym
Eleocharis quinqueflora var. bernardina
(Under Eleocharis bernardina)
Synonym
Eleocharis quinqueflora var. suksdorfiana
(Under Eleocharis suksdorfiana)
Synonym
Eleocharis radicansNative
Eleocharis rostellataNative
Eleocharis smallii
(Under Eleocharis palustris)
Synonym
Eleocharis suksdorfianaNative
Eleocharis tenuis var. tenuisHistorical waif
Eleocharis thermalis
(Under Eleocharis flavescens var. flavescens)
Synonym
Eleocharis torticulmisCALIFORNIA TWISTED SPIKERUSHNative
Eleusine
  ↳  Key to Eleusine
Eleusine coracana subsp. africanaAFRICAN FINGER MILLETNaturalized
Eleusine indicaGOOSE GRASS, INDIA GOOSE GRASSNaturalized
Eleusine indica subsp. africana
(Under Eleusine coracana subsp. africana)
Synonym
Eleusine tristachyaTHREE-SPIKED GOOSE GRASSNaturalized
Ellisia chrysanthemifolia
(Under Eucrypta chrysanthemifolia var. chrysanthemifolia)
Synonym
Ellisia micrantha
(Under Eucrypta micrantha)
Synonym
Ellisia torreyi
(Under Eucrypta chrysanthemifolia var. bipinnatifida)
Synonym
Ellisia torreyi var. bipinnatifida
(Under Eucrypta chrysanthemifolia var. bipinnatifida)
Synonym
Ellisia torreyi var. orcuttii
(Under Eucrypta chrysanthemifolia var. chrysanthemifolia)
Synonym
Ellisia torreyi var. paniculata
(Under Eucrypta chrysanthemifolia var. chrysanthemifolia)
Synonym
Elodea
  ↳  Key to Elodea
Elodea bifoliataTWO-LEAF WATERWEEDNative
Elodea brandegeeae
(Under Elodea canadensis)
Synonym
Elodea canadensisCOMMON WATERWEEDNative
Elodea densa
(Under Egeria densa)
Synonym
Elodea longivaginata
(Under Elodea bifoliata)
Synonym
Elodea nevadensis
(Under Elodea bifoliata)
Synonym
Elodea nuttalliiNUTTALL'S WATERWEEDNative
Elymus
  ↳  Key to Elymus
WILD-RYE, WHEAT GRASS, SQUIRRELTAIL
Elymus ×gouldiiNative
Elymus ×vancouverensisNative
Elymus californicusCALIFORNIA BOTTLE-BRUSH GRASSNative
Elymus caput-medusaeMEDUSA HEADNaturalized
Elymus cinereusGREAT BASIN WILD-RYENative
Elymus condensatusGIANT WILD-RYENative
Elymus elongatus var. ponticus
(Under Elymus ponticus)
Synonym
Elymus elymoidesSQUIRRELTAILNative
Elymus elymoides subsp. brevifolius
(Under Elymus elymoides var. brevifolius)
Synonym
Elymus elymoides subsp. californicus
(Under Elymus elymoides var. californicus)
Synonym
Elymus elymoides subsp. elymoides
(Under Elymus elymoides var. elymoides)
Synonym
Elymus elymoides var. brevifoliusNative
Elymus elymoides var. californicusNative
Elymus elymoides var. elymoidesNative
Elymus glaucusBLUE OR WESTERN WILD-RYENative
Elymus glaucus subsp. glaucusNative
Elymus glaucus subsp. jepsonii
(Under Elymus glaucus subsp. glaucus)
Synonym
Elymus glaucus subsp. virescensNative
Elymus glaucus var. jepsonii
(Under Elymus glaucus subsp. glaucus)
Synonym
Elymus hispidusNaturalized
Elymus lanceolatus subsp. lanceolatusTHICK-SPIKE WHEAT GRASSNative
Elymus lanceolatus subsp. riparius
(Under Elymus lanceolatus subsp. lanceolatus)
Synonym
Elymus mollis subsp. mollisAMERICAN DUNE GRASS, SEA LYME GRASSNative
Elymus multisetusBIG SQUIRRELTAILNative
Elymus pacificusPACIFIC WILD-RYENative
Elymus ponticusTALL WHEAT GRASSNaturalized
Elymus repensQUACK GRASSNaturalized
Elymus salinaSALINA PASS WILD-RYENative
Elymus scribneriSCRIBNER'S WHEAT GRASSNative
Elymus sierraeNative
Elymus smithiiWESTERN WHEAT GRASSNative
Elymus spicatusBLUE BUNCH WHEAT GRASSNative
Elymus stebbinsiiSTEBBINS' WHEAT GRASSNative
Elymus trachycaulus subsp. subsecundus
(Under Elymus trachycaulus subsp. trachycaulus)
Synonym
Elymus trachycaulus subsp. trachycaulusSLENDER WHEAT GRASSNative
Elymus triticoidesBEARDLESS WILD-RYENative
Elytrigia elongata
(Under Elymus ponticus)
Synonym
Elytrigia intermedia
(Under Elymus hispidus)
Synonym
Elytrigia intermedia subsp. barbulata
(Under Elymus hispidus)
Synonym
Elytrigia intermedia subsp. intermedia
(Under Elymus hispidus)
Synonym
Elytrigia intermedia var. intermedia
(Under Elymus hispidus)
Synonym
Elytrigia pontica
(Under Elymus ponticus)
Synonym
Elytrigia pontica subsp. pontica
(Under Elymus ponticus)
Synonym
Elytrigia repens
(Under Elymus repens)
Synonym
Emex
  ↳  Key to Emex
Emex australisSOUTHERN THREE-CORNERED JACKNaturalized
Emex spinosaDEVIL'S THORNNaturalized
Emmenanthe
  ↳  Key to Emmenanthe
Emmenanthe glandulifera
(Under Phacelia adenophora)
Synonym
Emmenanthe parviflora
(Under Phacelia inundata)
Synonym
Emmenanthe pendulifloraWHISPERING BELLSNative
Emmenanthe penduliflora var. rosea
(Under Emmenanthe rosea)
Synonym
Emmenanthe pusilla
(Under Phacelia tetramera)
Synonym
Emmenanthe roseaPINK WHISPERING BELLSNative
Empetrum
Empetrum nigrumBLACK CROWBERRYNative
Encelia
  ↳  Key to Encelia
Encelia actoniNative
Encelia californicaNative
Encelia farinosaBRITTLEBUSHNative
Encelia farinosa × Encelia frutescensSpontaneous hybrid
Encelia farinosa var. farinosaNative
Encelia farinosa var. phenicodontaNative
Encelia frutescensNative
Encelia virginensisNative
Encelia virginensis subsp. actoni
(Under Encelia actoni)
Synonym
Enceliopsis
  ↳  Key to Enceliopsis
Enceliopsis argophylla var. grandiflora
(Under Enceliopsis covillei)
Synonym
Enceliopsis covilleiPANAMINT DAISYNative
Enceliopsis nudicaulisNAKED-STEMMED DAISYNative
Enceliopsis nudicaulis var. corrugata
(Under Enceliopsis nudicaulis)
Synonym
Enemion
  ↳  Key to Enemion
FALSE RUE-ANEMONE
Enemion occidentaleWESTERN RUE-ANEMONENative
Enemion stipitatumSISKIYOU RUE-ANEMONENative
Engellaria
Engellaria obtusaOBTUSE STARWORT, ROCKY MOUNTAIN STARWORTNative
EnneapogonPAPPUS GRASS
Enneapogon desvauxiiNINE-AWNED PAPPUS GRASSNative
Ephedra
  ↳  Key to Ephedra
EPHEDRA, MORMON TEA
Ephedra asperaBOUNDARY EPHEDRANative
Ephedra californicaDESERT TEANative
Ephedra californica var. funerea
(Under Ephedra funerea)
Synonym
Ephedra clokeyi
(Under Ephedra aspera)
Synonym
Ephedra distachya
(Under Ephedra foeminea)
Misapplied name
Ephedra fasciculata
(Under Ephedra aspera)
Synonym
Ephedra fasciculata var. clokeyi
(Under Ephedra aspera)
Synonym
Ephedra fasciculata var. fasciculata
(Under Ephedra aspera)
Synonym
Ephedra foemineaNaturalized
Ephedra funereaDEATH VALLEY EPHEDRANative
Ephedra nevadensisNEVADA EPHEDRANative
Ephedra nevadensis f. rosea
(Under Ephedra nevadensis)
Synonym
Ephedra nevadensis subvar. paucibracteata
(Under Ephedra nevadensis)
Synonym
Ephedra nevadensis subvar. pluribracteata
(Under Ephedra viridis)
Synonym
Ephedra nevadensis var. aspera
(Under Ephedra aspera)
Synonym
Ephedra nevadensis var. viridis
(Under Ephedra viridis)
Synonym
Ephedra peninsularis
(Under Ephedra aspera)
Synonym
Ephedra reedii
(Under Ephedra aspera)
Synonym
Ephedra trifurcaLONGLEAF EPHEDRANative
Ephedra viridisGREEN EPHEDRANative
EphedraceaeEPHEDRA FAMILY
Epilobium
  ↳  Key to Epilobium
WILLOWHERB
Epilobium adenocaulon
(Under Epilobium ciliatum subsp. ciliatum)
Synonym
Epilobium adenocaulon var. holosericeum
(Under Epilobium ciliatum subsp. ciliatum)
Synonym
Epilobium adenocaulon var. occidentale
(Under Epilobium ciliatum subsp. ciliatum)
Synonym
Epilobium adenocaulon var. parishii
(Under Epilobium ciliatum subsp. ciliatum)
Synonym
Epilobium anagallidifoliumNative
Epilobium angustifolium subsp. circumvagum
(Under Chamerion angustifolium subsp. circumvagum)
Synonym
Epilobium brachycarpumNative
Epilobium brevistylum var. brevistylum
(Under Epilobium ciliatum subsp. glandulosum)
Synonym
Epilobium brevistylum var. ursinum
(Under Epilobium hallianum)
Synonym
Epilobium campestreNative
Epilobium canumCALIFORNIA FUCHSIA, ZAUSCHNERIANative
Epilobium canum subsp. canumNative
Epilobium canum subsp. garrettiiNative
Epilobium canum subsp. latifoliumNative
Epilobium canum subsp. septentrionale
(Under Epilobium septentrionale)
Synonym
Epilobium ciliatumNative
Epilobium ciliatum subsp. ciliatumNative
Epilobium ciliatum subsp. glandulosumNative
Epilobium ciliatum subsp. watsoniiNative
Epilobium clavatumNative
Epilobium cleistogamumNative
Epilobium densiflorumNative
Epilobium drummondii
(Under Epilobium saximontanum)
Synonym
Epilobium exaltatum
(Under Epilobium oreganum)
Synonym
Epilobium foliosum
(Under Epilobium ravenii)
Illegitimate name
Epilobium glaberrimumNative
Epilobium glaberrimum subsp. fastigiatumNative
Epilobium glaberrimum subsp. glaberrimumNative
Epilobium glaberrimum var. fastigiatum
(Under Epilobium glaberrimum subsp. fastigiatum)
Synonym
Epilobium glandulosum
(Under Epilobium ciliatum subsp. glandulosum)
Synonym
Epilobium halleanum
(Under Epilobium hallianum)
Orthographic variant
Epilobium hallianumNative
Epilobium hornemannii subsp. hornemanniiNative
Epilobium howelliiSUBALPINE FIREWEEDNative
Epilobium lactiflorumNative
Epilobium latifolium
(Under Chamerion latifolium)
Synonym
Epilobium leptophyllumNaturalized
Epilobium luteumYELLOW WILLOWHERBNative
Epilobium minutumNative
Epilobium niviumSNOW MOUNTAIN WILLOWHERBNative
Epilobium obcordatumNative
Epilobium obcordatum subsp. siskiyouense
(Under Epilobium siskiyouense)
Synonym
Epilobium obcordatum var. laxum
(Under Epilobium siskiyouense)
Synonym
Epilobium oreganumOREGON FIREWEEDNative
Epilobium oregonenseNative
Epilobium pallidumNative
Epilobium palustreMARSH WILLOWHERBNative
Epilobium paniculatum
(Under Epilobium brachycarpum)
Synonym
Epilobium paniculatum var. jucundum
(Under Epilobium brachycarpum)
Synonym
Epilobium paniculatum var. laevicaule
(Under Epilobium brachycarpum)
Synonym
Epilobium paniculatum var. tracyi
(Under Epilobium brachycarpum)
Synonym
Epilobium pringleanum
(Under Epilobium hallianum)
Synonym
Epilobium pringleanum var. tenue
(Under Epilobium hallianum)
Synonym
Epilobium pygmaeum
(Under Epilobium campestre)
Illegitimate name
Epilobium raveniiNative
Epilobium rigidumSISKIYOU MOUNTAINS WILLOWHERBNative
Epilobium saximontanumNative
Epilobium septentrionaleHUMBOLDT COUNTY FUCHSIANative
Epilobium siskiyouenseSISKIYOU FIREWEEDNative
Epilobium torreyiNative
Epilobium watsonii
(Under Epilobium ciliatum subsp. watsonii)
Synonym
Epilobium watsonii var. franciscanum
(Under Epilobium ciliatum subsp. watsonii)
Synonym
Epipactis
  ↳  Key to Epipactis
Epipactis giganteaSTREAM ORCHIDNative
Epipactis gigantea f. rubrifolia
(Under Epipactis gigantea)
Synonym
Epipactis helleborineBROAD-LEAVED HELLEBORINENaturalized
EquisetaceaeHORSETAIL FAMILY
Equisetum
  ↳  Key to Equisetum
HORSETAIL, SCOURING RUSH
Equisetum ×ferrissiiFERRISS' HORSETAILNative
Equisetum arvenseCOMMON HORSETAILNative
Equisetum fontinale
(Under Equisetum laevigatum)
Synonym
Equisetum funstonii
(Under Equisetum laevigatum)
Synonym
Equisetum hyemale subsp. affineCOMMON SCOURING RUSHNative
Equisetum hyemale var. californicum
(Under Equisetum hyemale subsp. affine)
Synonym
Equisetum hyemale var. robustum
(Under Equisetum hyemale subsp. affine)
Synonym
Equisetum kansanum
(Under Equisetum laevigatum)
Synonym
Equisetum laevigatumSMOOTH SCOURING RUSHNative
Equisetum palustreMARSH HORSETAILNative
Equisetum telmateia subsp. brauniiGIANT HORSETAILNative
Eragrostis
  ↳  Key to Eragrostis
LOVE GRASS
Eragrostis arida
(Under Eragrostis pectinacea var. miserrima)
Synonym
Eragrostis barrelieriMEDITERRANEAN LOVE GRASSNaturalized
Eragrostis cilianensisSTINK GRASSNaturalized
Eragrostis curvulaWEEPING LOVE GRASSNaturalized
Eragrostis curvula var. curvula
(Under Eragrostis curvula)
Synonym
Eragrostis diffusa
(Under Eragrostis pectinacea var. pectinacea)
Synonym
Eragrostis fendleriana
(Under Poa fendleriana)
Synonym
Eragrostis hypnoidesCREEPING LOVE GRASSNative
Eragrostis lehmannianaLEHMANN'S LOVE GRASSNaturalized
Eragrostis lutescensSIX-WEEKS LOVE GRASSNative
Eragrostis megastachya
(Under Eragrostis cilianensis)
Synonym
Eragrostis mexicanaNative
Eragrostis mexicana subsp. mexicanaMEXICAN LOVE GRASSNative
Eragrostis mexicana subsp. virescensCHILEAN LOVE GRASSNative
Eragrostis minorLITTLE LOVE GRASSNaturalized
Eragrostis neomexicana
(Under Eragrostis mexicana subsp. mexicana)
Synonym
Eragrostis orcuttiana
(Under Eragrostis mexicana subsp. virescens)
Synonym
Eragrostis pectinaceaNative
Eragrostis pectinacea var. miserrimaGULF LOVE GRASSNative
Eragrostis pectinacea var. pectinaceaCAROLINA LOVE GRASSNative
Eragrostis pilosa var. pilosaNaturalized
Eragrostis poaeoides
(Under Eragrostis minor)
Synonym
Eragrostis tephrosanthos
(Under Eragrostis pectinacea var. miserrima)
Synonym
Erechtites glomerata
(Under Senecio glomeratus)
Orthographic variant
Erechtites glomeratus
(Under Senecio glomeratus)
Synonym
Erechtites minima
(Under Senecio minimus)
Orthographic variant
Erechtites minimus
(Under Senecio minimus)
Synonym
Erechtites quadridentatus
(Under Senecio quadridentatus)
Synonym
Eremalche
  ↳  Key to Eremalche
Eremalche exilisWHITE MALLOWNative
Eremalche kernensis
(Under Eremalche parryi subsp. kernensis)
Synonym
Eremalche parryiNative
Eremalche parryi subsp. kernensisKERN MALLOWNative
Eremalche parryi subsp. parryiPARRY'S MALLOWNative
Eremalche rotundifoliaDESERT FIVESPOTNative
Eremocarpus setiger
(Under Croton setiger)
Synonym
Eremocarya
  ↳  Key to Eremocarya
Eremocarya lepidaMOUNTAIN RED-ROOTNative
Eremocarya micrantha var. micranthaDESERT RED-ROOTNative
Eremogone
  ↳  Key to Eremogone
SANDWORT
Eremogone aculeataPRICKLY SANDWORTNative
Eremogone cliftoniiCLIFTON'S EREMOGONE, CLIFTON'S SANDWORTNative
Eremogone congestaBALLHEAD SANDWORTNative
Eremogone congesta var. charlestonensisCHARLESTON SANDWORTNative
Eremogone congesta var. congestaNative
Eremogone congesta var. crassulaNative
Eremogone congesta var. simulansNative
Eremogone congesta var. subcongestaNative
Eremogone congesta var. suffrutescensSUFFRUTESCENT SANDWORTNative
Eremogone ferrisiaeFERRIS' SANDWORTNative
Eremogone kingii var. glabrescensKING'S SANDWORTNative
Eremogone macradeniaMOJAVE or DESERT SANDWORTNative
Eremogone macradenia var. arcuifoliaNative
Eremogone macradenia var. ferrisiae
(Under Eremogone ferrisiae)
Synonym
Eremogone macradenia var. macradeniaNative
Eremogone ursinaBEAR VALLEY SANDWORTNative
Eremothera
  ↳  Key to Eremothera
Eremothera boothiiNative
Eremothera boothii subsp. alyssoidesPINE CREEK EVENING-PRIMROSENative
Eremothera boothii subsp. boothiiBOOTH'S EVENING-PRIMROSENative
Eremothera boothii subsp. condensataNative
Eremothera boothii subsp. decorticansSHREDDING EVENING-PRIMROSENative
Eremothera boothii subsp. desertorumNative
Eremothera boothii subsp. intermediaBOOTH'S HAIRY EVENING-PRIMROSENative
Eremothera chamaenerioidesNative
Eremothera minorNELSON'S EVENING-PRIMROSENative
Eremothera refractaNative
Erianthus ravennae
(Under Saccharum ravennae)
Synonym
Eriastrum
  ↳  Key to Eriastrum
WOOLLY-STAR
Eriastrum abramsiiABRAMS' WOOLLY-STARNative
Eriastrum brandegeeae
(Under Eriastrum ertterae)
Misapplied name
Eriastrum brandegeeae
(Under Eriastrum tracyi)
Synonym
Eriastrum calocyanumPRETTY BLUE WOOLLY-STARNative
Eriastrum densifoliumPERENNIAL WOOLLY-STAR, GIANT WOOLLY-STARNative
Eriastrum densifolium subsp. austromontanumMOUNTAIN WOOLLY-STARNative
Eriastrum densifolium subsp. densifoliumPERENNIAL WOOLLY-STARNative
Eriastrum densifolium subsp. elongatumELONGATE WOOLLY-STARNative
Eriastrum densifolium subsp. mohavenseMOJAVE WOOLLY-STARNative
Eriastrum densifolium subsp. patensSPREADING WOOLLY-STARNative
Eriastrum densifolium subsp. sanctorumSANTA ANA RIVER WOOLLY-STARNative
Eriastrum diffusumSPREADING WOOLLY-STARNative
Eriastrum diffusum subsp. coachellaeCOACHELLA WOOLLY-STARNative
Eriastrum diffusum subsp. diffusumSPREADING WOOLLY-STARNative
Eriastrum eremicum subsp. eremicumDESERT WOOLLY-STARNative
Eriastrum ertteraeLIME RIDGE WOOLLY-STAR, LIME RIDGE ERIASTRUM, ERTTER'S WOOLLY-STARNative
Eriastrum filifoliumTHREAD-LEAVED WOOLLY-STARNative
Eriastrum harwoodiiHARWOOD'S WOOLLY-STARNative
Eriastrum hooveriHOOVER'S WOOLLY-STARNative
Eriastrum hooveri
(Under Eriastrum ertterae)
Misapplied name
Eriastrum luteumYELLOW WOOLLY-STAR, YELLOW-FLOWERED ERIASTRUMNative
Eriastrum pluriflorumMANY-FLOWERED WOOLLY-STARNative
Eriastrum pluriflorum subsp. albifauxWHITE-THROATED WOOLLY-STARNative
Eriastrum pluriflorum subsp. pluriflorumMANY-FLOWERED WOOLLY-STAR, MANY-FLOWERED ERIASTRUMNative
Eriastrum pluriflorum subsp. sherman-hoytaeMRS. HOYT'S WOOLLY-STARNative
Eriastrum rosamondenseROSAMOND WOOLLY-STAR, ROSAMOND ERIASTRUMNative
Eriastrum sapphirinumSAPPHIRE WOOLLY-STARNative
Eriastrum sapphirinum subsp. ambiguumSHORT-BRACT WOOLLY-STARNative
Eriastrum sapphirinum subsp. brevibracteatum
(Under Eriastrum sapphirinum subsp. ambiguum)
Synonym
Eriastrum sapphirinum subsp. dasyanthumSHAGGY WOOLLY-STARNative
Eriastrum sapphirinum subsp. gymnocephalum
(Under Eriastrum sapphirinum subsp. sapphirinum)
Synonym
Eriastrum sapphirinum subsp. sapphirinumSAPPHIRE WOOLLY-STARNative
Eriastrum signatumSPOTTED WOOLLY-STARNative
Eriastrum sparsiflorumFEW-FLOWERED WOOLLY-STARNative
Eriastrum sparsiflorum subsp. harwoodii
(Under Eriastrum harwoodii)
Synonym
Eriastrum tracyiTRACY'S WOOLLY-STAR, TRACY'S ERIASTRUMNative
Eriastrum virgatumWAND WOOLLY-STAR, VIRGATE ERIASTRUMNative
Eriastrum wilcoxiiWILCOX'S WOOLLY-STARNative
Eriastrum wilcoxii
(Under Eriastrum calocyanum)
Misapplied name
EricaHEATH
Erica lusitanicaNaturalized
Ericaceae
  ↳  Key to Ericaceae
HEATH FAMILY
Ericameria
  ↳  Key to Ericameria
GOLDENBUSH, RABBITBRUSH
Ericameria albidaWHITE-FLOWERED RABBITBRUSHNative
Ericameria arborescensGOLDEN-FLEECENative
Ericameria arborescens subsp. parishii
(Under Ericameria parishii var. parishii)
Synonym
Ericameria bloomeriBLOOMER'S GOLDENBUSHNative
Ericameria brachylepisBOUNDARY GOLDENBUSHNative
Ericameria cooperi var. cooperiCOOPER'S GOLDENBUSHNative
Ericameria cuneataWEDGELEAF GOLDENBUSHNative
Ericameria cuneata var. cuneataCLIFF GOLDENBUSHNative
Ericameria cuneata var. macrocephalaLAGUNA MOUNTAINS GOLDENBUSHNative
Ericameria cuneata var. spathulataNative
Ericameria discoideaWHITESTEM GOLDENBUSHNative
Ericameria ericoidesMOCK HEATHER, CALIFORNIA GOLDENBUSHNative
Ericameria fasciculataEASTWOOD'S GOLDENBUSHNative
Ericameria gilmaniiGILMAN'S GOLDENBUSHNative
Ericameria greeneiGREENE'S GOLDENBUSHNative
Ericameria laricifoliaTURPENTINE-BRUSHNative
Ericameria linearifoliaINTERIOR GOLDENBUSHNative
Ericameria monocephala
(Under Ericameria parryi var. monocephala)
Synonym
Ericameria nanaDWARF GOLDENBUSHNative
Ericameria nauseosaRUBBER RABBITBRUSHNative
Ericameria nauseosa var. bernardinaBERNARDINA RABBITBRUSHNative
Ericameria nauseosa var. ceruminosaDESERT RABBITBRUSHNative
Ericameria nauseosa var. hololeucaWHITE RABBITBRUSHNative
Ericameria nauseosa var. leiospermaSMOOTH-FRUIT RABBITBRUSHNative
Ericameria nauseosa var. mohavensisMOJAVE RABBITBRUSHNative
Ericameria nauseosa var. oreophilaGREAT BASIN RABBITBRUSHNative
Ericameria nauseosa var. speciosaSHOWY RABBITBRUSHNative
Ericameria nauseosa var. washoensisWASHOE RABBITBRUSHNative
Ericameria ophitidisSERPENTINE GOLDENBUSHNative
Ericameria palmeriNative
Ericameria palmeri var. pachylepisTHICKBRACTED GOLDENBUSHNative
Ericameria palmeri var. palmeriPALMER'S GOLDENBUSHNative
Ericameria paniculataBLACK-BANDED RABBITBRUSHNative
Ericameria parishii var. parishiiPARISH'S GOLDENBUSHNative
Ericameria parryiPARRY'S GOLDENBUSHNative
Ericameria parryi var. asperaROUGH RABBITBRUSHNative
Ericameria parryi var. imulaLOW RABBITBRUSHNative
Ericameria parryi var. latiorWIDELEAF RABBITBRUSHNative
Ericameria parryi var. monocephalaONE-HEADED RABBITBRUSHNative
Ericameria parryi var. nevadensisNEVADA RABBITBRUSHNative
Ericameria parryi var. vulcanicaVULCAN RABBITBRUSHNative
Ericameria pinifoliaPINE-BUSHNative
Ericameria suffruticosaSINGLEHEAD GOLDENBUSHNative
Ericameria teretifoliaGREEN or ROUND-LEAF RABBITBRUSHNative
Erigeron
  ↳  Key to Erigeron
FLEABANE DAISY
Erigeron acris var. debilis
(Under Erigeron nivalis)
Synonym
Erigeron aequifoliusHALL'S DAISYNative
Erigeron algidusSIERRA FLEABANENative
Erigeron aliceaeALICE EASTWOOD'S FLEABANENative
Erigeron angustatus
(Under Erigeron greenei)
Illegitimate name
Erigeron annuusANNUAL FLEABANENaturalized
Erigeron aphanactisRAYLESS SHAGGY FLEABANENative
Erigeron aphanactis var. aphanactisNative
Erigeron aphanactis var. congestusNative
Erigeron argentatusSILVER FLEABANENative
Erigeron austiniae
(Under Erigeron chrysopsidis var. austiniae)
Synonym
Erigeron barbellulatusSHINING FLEABANENative
Erigeron biolettiiSTREAMSIDE DAISYNative
Erigeron blasdalei
(Under Erigeron foliosus var. hartwegii)
Synonym
Erigeron blochmaniaeBLOCHMAN'S LEAFY DAISYNative
Erigeron bloomeriBLOOMER'S FLEABANENative
Erigeron bloomeri var. bloomeriNative
Erigeron bloomeri var. nudatusWALDO DAISYNative
Erigeron bloomeri var. pubens
(Under Erigeron bloomeri var. bloomeri)
Synonym
Erigeron bonariensisFLAX-LEAVED HORSEWEEDNaturalized
Erigeron breweriBREWER'S FLEABANENative
Erigeron breweri var. bisanctusNative
Erigeron breweri var. breweriNative
Erigeron breweri var. covilleiNative
Erigeron breweri var. elmeri
(Under Erigeron elmeri)
Synonym
Erigeron breweri var. jacinteusSAN JACINTO MOUNTAINS DAISYNative
Erigeron breweri var. klamathensis
(Under Erigeron klamathensis)
Synonym
Erigeron breweri var. porphyreticusNative
Erigeron californicus
(Under Erigeron incomptus)
Misapplied name
Erigeron calvusBALD DAISYNative
Erigeron canadensisHORSEWEEDNative
Erigeron cervinusSISKIYOU DAISYNative
Erigeron chrysopsidis subsp. austiniae
(Under Erigeron chrysopsidis var. austiniae)
Synonym
Erigeron chrysopsidis var. austiniaeDWARF YELLOW FLEABANENative
Erigeron clokeyi var. pinzliaePINZL'S FLEABANENative
Erigeron compactusCOMPACT DAISYNative
Erigeron compositusCUT-LEAF FLEABANENative
Erigeron compositus var. discoideus
(Under Erigeron compositus)
Synonym
Erigeron compositus var. glabratus
(Under Erigeron compositus)
Synonym
Erigeron concinnus var. concinnusNAVAJO FLEABANENative
Erigeron conditiiCONDIT'S FLEABANENative
Erigeron coulteriCOULTER'S FLEABANENative
Erigeron debilis
(Under Erigeron nivalis)
Synonym
Erigeron decumbens subsp. robustior
(Under Erigeron robustior)
Synonym
Erigeron decumbens var. robustior
(Under Erigeron robustior)
Synonym
Erigeron delicatus
(Under Erigeron cervinus)
Synonym
Erigeron divergensSPREADING FLEABANENative
Erigeron eatoniiEATON'S FLEABANENative
Erigeron eatonii var. nevadincolaNEVADA DAISYNative
Erigeron eatonii var. plantagineusNative
Erigeron eatonii var. sonneiNative
Erigeron elegantulusVOLCANIC DAISYNative
Erigeron elmeriELMER'S FLEABANENative
Erigeron filifoliusTHREAD-LEAF FLEABANENative
Erigeron filifolius var. robustior
(Under Erigeron filifolius)
Synonym
Erigeron flagellarisTRAILING FLEABANENative
Erigeron foliosusLEAFY FLEABANENative
Erigeron foliosus var. blochmaniae
(Under Erigeron blochmaniae)
Synonym
Erigeron foliosus var. confinisNative
Erigeron foliosus var. foliosusNative
Erigeron foliosus var. franciscensisNative
Erigeron foliosus var. hartwegiiNative
Erigeron foliosus var. mendocinusNative
Erigeron foliosus var. setchellii
(Under Erigeron foliosus var. foliosus)
Synonym
Erigeron glacialisSUBALPINE FLEABANENative
Erigeron glacialis var. glacialisNative
Erigeron glacialis var. hirsutusNative
Erigeron glaucusSEASIDE DAISYNative
Erigeron greeneiGREENE'S NARROW-LEAVED DAISYNative
Erigeron incomptusCALIFORNIA FLEABANENative
Erigeron inornatusWESTERN RAYLESS FLEABANENative
Erigeron inornatus var. angustatus
(Under Erigeron reductus var. angustatus)
Synonym
Erigeron inornatus var. biolettii
(Under Erigeron biolettii)
Synonym
Erigeron inornatus var. calidipetrisHOT ROCK DAISYNative
Erigeron inornatus var. inornatusNative
Erigeron inornatus var. keiliiKEIL'S DAISYNative
Erigeron jacinteus
(Under Erigeron breweri var. jacinteus)
Synonym
Erigeron karvinskianusSANTA BARBARA DAISYNaturalized
Erigeron klamathensisKLAMATH FLEABANENative
Erigeron lassenianusLASSEN FLEABANENative
Erigeron lassenianus var. deficiensNative
Erigeron lassenianus var. lassenianusNative
Erigeron linearisDESERT YELLOW FLEABANENative
Erigeron lobatus
(Under Erigeron divergens)
Misapplied name
Erigeron lonchophyllusSHORT-RAYED FLEABANENative
Erigeron maniopotamicusMAD RIVER FLEABANE DAISYNative
Erigeron mariposanusMARIPOSA DAISYNative
Erigeron mendocinensis
(Under Erigeron foliosus var. mendocinus)
Synonym
Erigeron mendocinus
(Under Erigeron foliosus var. mendocinus)
Illegitimate name
Erigeron miserSTARVED DAISYNative
Erigeron multicepsKERN RIVER DAISYNative
Erigeron nevadensis var. pygmaeus
(Under Erigeron pygmaeus)
Synonym
Erigeron nevadincola
(Under Erigeron eatonii var. nevadincola)
Synonym
Erigeron nivalisSNOW FLEABANE DAISYNative
Erigeron oxyphyllusWAND-LIKE FLEABANE DAISYNative
Erigeron parishiiPARISH'S DAISYNative
Erigeron peregrinus subsp. callianthemus
(Under Erigeron glacialis var. glacialis)
Synonym
Erigeron peregrinus var. angustifolius
(Under Erigeron glacialis var. glacialis)
Synonym
Erigeron peregrinus var. callianthemus
(Under Erigeron glacialis var. glacialis)
Synonym
Erigeron peregrinus var. hirsutus
(Under Erigeron glacialis var. hirsutus)
Synonym
Erigeron petiolaris
(Under Erigeron algidus)
Synonym
Erigeron petrophilusROCK-LOVING FLEABANENative
Erigeron petrophilus var. petrophilusNative
Erigeron petrophilus var. sierrensisNORTHERN SIERRA DAISYNative
Erigeron petrophilus var. viscidulusKLAMATH ROCK DAISYNative
Erigeron philadelphicus var. philadelphicusPHILADELPHIA FLEABANENative
Erigeron plantagineus
(Under Erigeron eatonii var. plantagineus)
Synonym
Erigeron pumilus subsp. intermedius
(Under Erigeron pumilus var. intermedius)
Synonym
Erigeron pumilus var. gracilior
(Under Erigeron pumilus var. intermedius)
Synonym
Erigeron pumilus var. intermediusSHAGGY FLEABANENative
Erigeron pygmaeusPYGMY FLEABANENative
Erigeron reductusLITTLE RAYLESS FLEABANENative
Erigeron reductus var. angustatusNative
Erigeron reductus var. reductusCALIFORNIA RAYLESS DAISYNative
Erigeron robustiorROBUST DAISYNative
Erigeron sanctarumSAINTS' DAISYNative
Erigeron serpentinusSERPENTINE DAISYNative
Erigeron setchellii
(Under Erigeron foliosus var. foliosus)
Synonym
Erigeron strigosus var. septentrionalis
(Under Erigeron strigosus var. strigosus)
Synonym
Erigeron strigosus var. strigosusPRAIRIE FLEABANENaturalized
Erigeron sumatrensisTROPICAL HORSEWEEDNaturalized
Erigeron supplexSUPPLE DAISYNative
Erigeron tenerTHIN DAISYNative
Erigeron uncialis subsp. uncialis
(Under Erigeron uncialis var. uncialis)
Synonym
Erigeron uncialis var. uncialisLIMESTONE DAISYNative
Erigeron utahensisUTAH DAISYNative
Erigeron vagusRAMBLING FLEABANENative
EriobotryaLOQUAT
Eriobotrya japonicaAgricultural, garden, or urban weed
Eriochloa
  ↳  Key to Eriochloa
CUP GRASS
Eriochloa acuminata var. acuminataSOUTHWESTERN CUP GRASS, SUMMER GRASSNative
Eriochloa aristata var. aristataAWNED CUP GRASSNaturalized
Eriochloa contractaPRAIRIE CUP GRASSNaturalized
Eriochloa gracilis
(Under Eriochloa acuminata var. acuminata)
Synonym
Eriodictyon
  ↳  Key to Eriodictyon
YERBA SANTA
Eriodictyon altissimumINDIAN KNOB MOUNTAINBALMNative
Eriodictyon angustifoliumNARROW-LEAVED YERBA SANTANative
Eriodictyon californicumCALIFORNIA YERBA SANTANative
Eriodictyon californicum var. lanatum
(Under Eriodictyon trichocalyx var. lanatum)
Synonym
Eriodictyon capitatumLOMPOC YERBA SANTANative
Eriodictyon crassifoliumNative
Eriodictyon crassifolium var. crassifoliumTHICK-LEAVED YERBA SANTANative
Eriodictyon crassifolium var. denudatum
(Under Eriodictyon crassifolium var. nigrescens)
Synonym
Eriodictyon crassifolium var. nigrescensBICOLORED YERBA SANTANative
Eriodictyon lanatum
(Under Eriodictyon trichocalyx var. lanatum)
Synonym
Eriodictyon lobbiiMATTED YERBA SANTANative
Eriodictyon parryiPOODLE-DOG BUSHNative
Eriodictyon sessilifoliumSESSILE-LEAVED YERBA SANTANative
Eriodictyon tomentosumWOOLLY YERBA SANTANative
Eriodictyon traskiaeNative
Eriodictyon traskiae subsp. smithiiSMITH'S YERBA SANTANative
Eriodictyon traskiae subsp. traskiaeTRASK'S YERBA SANTANative
Eriodictyon trichocalyxNative
Eriodictyon trichocalyx var. lanatumSAN DIEGO YERBA SANTANative
Eriodictyon trichocalyx var. trichocalyxHAIRY YERBA SANTANative
Eriogonella membranacea
(Under Chorizanthe membranacea)
Synonym
Eriogonella spinosa
(Under Chorizanthe spinosa)
Synonym
Eriogonum
  ↳  Key to Eriogonum
WILD BUCKWHEAT
Eriogonum abramsii
(Under Acanthoscyphus parishii var. abramsii)
Synonym
Eriogonum abramsii subsp. acanthoscyphus
(Under Acanthoscyphus parishii var. parishii)
Synonym
Eriogonum acetoselloides
(Under Eriogonum gracile var. gracile)
Synonym
Eriogonum affine
(Under Eriogonum nudum var. oblongifolium)
Synonym
Eriogonum agninum
(Under Eriogonum cithariforme var. agninum)
Synonym
Eriogonum alpinumTRINITY BUCKWHEATNative
Eriogonum ampullaceumMONO WILD BUCKWHEATNative
Eriogonum andinum
(Under Eriogonum caespitosum)
Synonym
Eriogonum angulosumANGLE-STEM WILD BUCKWHEATNative
Eriogonum angulosum subsp. bidentatum
(Under Eriogonum viridescens)
Synonym
Eriogonum angulosum subsp. gracillimum
(Under Eriogonum gracillimum)
Synonym
Eriogonum angulosum subsp. maculatum
(Under Eriogonum maculatum)
Synonym
Eriogonum angulosum subsp. victorense
(Under Eriogonum gracillimum)
Synonym
Eriogonum angulosum subsp. viridescens
(Under Eriogonum viridescens)
Synonym
Eriogonum angulosum var. flabellatum
(Under Eriogonum maculatum)
Synonym
Eriogonum angulosum var. gracillimum
(Under Eriogonum gracillimum)
Synonym
Eriogonum angulosum var. maculatum
(Under Eriogonum maculatum)
Synonym
Eriogonum angulosum var. patens
(Under Eriogonum maculatum)
Synonym
Eriogonum angulosum var. pauciflorum
(Under Eriogonum maculatum)
Synonym
Eriogonum angulosum var. rectipes
(Under Eriogonum maculatum)
Synonym
Eriogonum angulosum var. variable
(Under Eriogonum gracillimum)
Synonym
Eriogonum angulosum var. victorense
(Under Eriogonum gracillimum)
Synonym
Eriogonum angulosum var. viridescens
(Under Eriogonum viridescens)
Synonym
Eriogonum angustifolium
(Under Eriogonum heracleoides var. heracleoides)
Synonym
Eriogonum anserinum
(Under Eriogonum strictum var. anserinum)
Synonym
Eriogonum apachense
(Under Eriogonum heermannii var. argense)
Synonym
Eriogonum apiculatumSAN JACINTO WILD BUCKWHEATNative
Eriogonum apricumNative
Eriogonum apricum var. apricumIONE BUCKWHEATNative
Eriogonum apricum var. prostratumIRISH HILL BUCKWHEATNative
Eriogonum arachnoideum
(Under Eriogonum latifolium)
Synonym
Eriogonum arborescensSANTA CRUZ ISLAND WILD BUCKWHEATNative
Eriogonum argillosumCLAY BUCKWHEATNative
Eriogonum aridum
(Under Eriogonum umbellatum var. dichrocephalum)
Synonym
Eriogonum aspalathoides
(Under Eriogonum fasciculatum var. fasciculatum)
Synonym
Eriogonum aureum var. ambiguum
(Under Eriogonum microtheca var. ambiguum)
Synonym
Eriogonum auriculatum
(Under Eriogonum nudum var. auriculatum)
Synonym
Eriogonum baileyiNative
Eriogonum baileyi subsp. elegans
(Under Eriogonum elegans)
Synonym
Eriogonum baileyi var. baileyiBAILEY'S WILD BUCKWHEATNative
Eriogonum baileyi var. brachyanthum
(Under Eriogonum brachyanthum)
Synonym
Eriogonum baileyi var. davidsonii
(Under Eriogonum davidsonii)
Synonym
Eriogonum baileyi var. divaricatum
(Under Eriogonum baileyi var. praebens)
Synonym
Eriogonum baileyi var. porphyreticum
(Under Eriogonum baileyi var. baileyi)
Synonym
Eriogonum baileyi var. praebensBAILEY'S WOOLLY BUCKWHEATNative
Eriogonum baileyi var. tomentosum
(Under Eriogonum palmerianum)
Synonym
Eriogonum baratum
(Under Eriogonum deflexum var. baratum)
Synonym
Eriogonum beatleyae
(Under Eriogonum rosense var. rosense)
Misapplied name
Eriogonum bellum
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum bidentatum
(Under Eriogonum viridescens)
Synonym
Eriogonum bifurcatumFORKED BUCKWHEATNative
Eriogonum biumbellatum
(Under Eriogonum umbellatum var. subaridum)
Synonym
Eriogonum bloomeri
(Under Eriogonum saxatile)
Synonym
Eriogonum brachyanthumSHORT-FLOWER WILD BUCKWHEATNative
Eriogonum brachypodumPARRY'S WILD BUCKWHEATNative
Eriogonum breedloveiNative
Eriogonum breedlovei var. breedloveiBREEDLOVE'S BUCKWHEATNative
Eriogonum breedlovei var. shevockiiTHE NEEDLES BUCKWHEATNative
Eriogonum butterworthianumBUTTERWORTH'S BUCKWHEATNative
Eriogonum caespitosumMATTED WILD BUCKWHEATNative
Eriogonum caespitosum var. alyssoides
(Under Eriogonum caespitosum)
Synonym
Eriogonum caespitosum var. kelloggii
(Under Eriogonum kelloggii)
Synonym
Eriogonum callistumTEHACHAPI BUCKWHEATNative
Eriogonum caninum
(Under Eriogonum luteolum var. caninum)
Synonym
Eriogonum capitatum
(Under Eriogonum nudum var. oblongifolium)
Synonym
Eriogonum carneum
(Under Eriogonum glandulosum)
Synonym
Eriogonum caryophylloides
(Under Sidotheca caryophylloides)
Synonym
Eriogonum cedrorumTHE CEDARS BUCKWHEATNative
Eriogonum cernuumNODDING WILD BUCKWHEATNative
Eriogonum cernuum subsp. acutangulum
(Under Eriogonum maculatum)
Synonym
Eriogonum cernuum subsp. tenue
(Under Eriogonum cernuum)
Synonym
Eriogonum cernuum subsp. thurberi
(Under Eriogonum thurberi)
Synonym
Eriogonum cernuum subsp. viminale
(Under Eriogonum cernuum)
Synonym
Eriogonum cernuum subsp. viscosum
(Under Eriogonum thurberi)
Synonym
Eriogonum cernuum var. psammophilum
(Under Eriogonum cernuum)
Synonym
Eriogonum cernuum var. purpurascens
(Under Eriogonum nutans var. nutans)
Synonym
Eriogonum cernuum var. tenue
(Under Eriogonum cernuum)
Synonym
Eriogonum cernuum var. umbraticum
(Under Eriogonum cernuum)
Synonym
Eriogonum cernuum var. viminale
(Under Eriogonum cernuum)
Synonym
Eriogonum cinereumCOASTAL WILD BUCKWHEATNative
Eriogonum cithariformeNative
Eriogonum cithariforme var. agninumSANTA YNEZ WILD BUCKWHEATNative
Eriogonum cithariforme var. cithariformeCITHARA WILD BUCKWHEATNative
Eriogonum clavatumHOOVER'S DESERT TRUMPETNative
Eriogonum clutei
(Under Eriogonum inflatum)
Synonym
Eriogonum collinumHILL BUCKWHEATNative
Eriogonum commixtum
(Under Eriogonum baileyi var. praebens)
Synonym
Eriogonum comosum
(Under Eriogonum reniforme)
Synonym
Eriogonum comosum var. playanum
(Under Eriogonum pusillum)
Synonym
Eriogonum compositum var. citrinum
(Under Eriogonum compositum var. compositum)
Synonym
Eriogonum compositum var. compositumARROW-LEAF WILD BUCKWHEATNative
Eriogonum compositum var. pilicaule
(Under Eriogonum compositum var. compositum)
Synonym
Eriogonum confertiflorum
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum congdoniiCONGDON'S BUCKWHEATNative
Eriogonum contiguumREVEAL'S BUCKWHEATNative
Eriogonum cordatum
(Under Eriogonum trichopes)
Synonym
Eriogonum coryphaeum
(Under Eriogonum pyrolifolium var. coryphaeum)
Synonym
Eriogonum covilleanumCOVILLE'S WILD BUCKWHEATNative
Eriogonum covilleanum subsp. adsurgens
(Under Eriogonum eastwoodianum)
Synonym
Eriogonum covillei
(Under Eriogonum umbellatum var. covillei)
Synonym
Eriogonum crocatumCONEJO BUCKWHEATNative
Eriogonum cupulatum
(Under Eriogonum marifolium var. cupulatum)
Synonym
Eriogonum curvatum
(Under Eriogonum wrightii var. subscaposum)
Synonym
Eriogonum cusickii
(Under Eriogonum strictum var. proliferum)
Illegitimate name
Eriogonum cusickii var. californicum
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum cuspidatum
(Under Oxytheca watsonii)
Synonym
Eriogonum dasyanthemumCHAPARRAL WILD BUCKWHEATNative
Eriogonum dasyanthemum var. jepsonii
(Under Eriogonum dasyanthemum)
Synonym
Eriogonum davidsoniiDAVIDSON'S WILD BUCKWHEATNative
Eriogonum davisianum
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum deductum
(Under Eriogonum nudum var. deductum)
Synonym
Eriogonum deflexumSKELETON WEEDNative
Eriogonum deflexum f. stenopetala
(Under Eriogonum deflexum var. deflexum)
Synonym
Eriogonum deflexum subsp. baratum
(Under Eriogonum deflexum var. baratum)
Synonym
Eriogonum deflexum subsp. brachypodum
(Under Eriogonum brachypodum)
Synonym
Eriogonum deflexum subsp. hookeri
(Under Eriogonum hookeri)
Synonym
Eriogonum deflexum subsp. insigne
(Under Eriogonum deflexum var. deflexum)
Synonym
Eriogonum deflexum subsp. parryi
(Under Eriogonum brachypodum)
Synonym
Eriogonum deflexum subsp. rixfordii
(Under Eriogonum rixfordii)
Synonym
Eriogonum deflexum subsp. ultrum
(Under Eriogonum nutans var. nutans)
Synonym
Eriogonum deflexum var. baratumTALL SKELETON WEEDNative
Eriogonum deflexum var. brachypodum
(Under Eriogonum brachypodum)
Synonym
Eriogonum deflexum var. deflexumFLAT-TOPPED SKELETON WEEDNative
Eriogonum deflexum var. gilvum
(Under Eriogonum hookeri)
Synonym
Eriogonum deflexum var. insigne
(Under Eriogonum deflexum var. deflexum)
Synonym
Eriogonum deflexum var. nevadenseNEVADA SKELETON WEEDNative
Eriogonum deflexum var. rectum
(Under Eriogonum deflexum var. deflexum)
Synonym
Eriogonum deflexum var. turbinatum
(Under Eriogonum deflexum var. deflexum)
Synonym
Eriogonum delicatulum
(Under Eriogonum mohavense)
Synonym
Eriogonum dendroideum
(Under Oxytheca dendroidea subsp. dendroidea)
Synonym
Eriogonum dendroideum var. hillmanii
(Under Oxytheca dendroidea subsp. dendroidea)
Synonym
Eriogonum densum
(Under Eriogonum polycladon)
Synonym
Eriogonum denudatum
(Under Eriogonum elongatum var. elongatum)
Synonym
Eriogonum denudatum
(Under Nemacaulis denudata var. denudata)
Illegitimate name
Eriogonum deserticolaCOLORADO DESERT WILD BUCKWHEATNative
Eriogonum dichroanthum
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum diclinumJAYNES CANYON BUCKWHEATNative
Eriogonum douglasii
(Under Eriogonum douglasii var. meridionale)
Noted name
Eriogonum douglasii var. douglasii
(Under Eriogonum douglasii var. meridionale)
Misapplied name
Eriogonum douglasii var. meridionaleSOUTHERN WILD BUCKWHEATNative
Eriogonum douglasii var. twisselmannii
(Under Eriogonum twisselmannii)
Synonym
Eriogonum dudleyanum
(Under Eriogonum nummulare)
Synonym
Eriogonum dumosum
(Under Eriogonum umbellatum var. dumosum)
Synonym
Eriogonum eastwoodianumEASTWOOD'S BUCKWHEATNative
Eriogonum effusum subsp. nelsonii
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum effusum subsp. simpsonii
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum effusum var. foliosum
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum effusum var. limbatum
(Under Eriogonum microtheca var. panamintense)
Synonym
Eriogonum elatumNative
Eriogonum elatum subsp. glabrescens
(Under Eriogonum latens)
Synonym
Eriogonum elatum subsp. villosum
(Under Eriogonum elatum var. villosum)
Synonym
Eriogonum elatum var. elatumTALL WILD BUCKWHEATNative
Eriogonum elatum var. erianthum
(Under Eriogonum elatum var. elatum)
Synonym
Eriogonum elatum var. incurvum
(Under Eriogonum elatum var. villosum)
Synonym
Eriogonum elatum var. limonifolium
(Under Eriogonum elatum var. elatum)
Synonym
Eriogonum elatum var. villosumTALL WOOLLY WILD BUCKWHEATNative
Eriogonum elegansELEGANT WILD BUCKWHEATNative
Eriogonum ellipticum var. megacephalum
(Under Eriogonum sphaerocephalum var. sphaerocephalum)
Synonym
Eriogonum elongatum var. elongatumLONG-STEM WILD BUCKWHEATNative
Eriogonum emarginatum
(Under Sidotheca emarginata)
Synonym
Eriogonum eremicolaWILDROSE CANYON BUCKWHEATNative
Eriogonum ericifolium subsp. thornei
(Under Eriogonum thornei)
Synonym
Eriogonum ericifolium var. thornei
(Under Eriogonum thornei)
Synonym
Eriogonum esmeraldense var. esmeraldenseESMERALDA WILD BUCKWHEATNative
Eriogonum esmeraldense var. tayei
(Under Eriogonum esmeraldense var. esmeraldense)
Synonym
Eriogonum evanidumVANISHING WILD BUCKWHEATNative
Eriogonum exaltatumLADDER WILD BUCKWHEATNative
Eriogonum eximium
(Under Eriogonum ovalifolium var. eximium)
Synonym
Eriogonum fasciculatumCALIFORNIA BUCKWHEATNative
Eriogonum fasciculatum subsp. aspalathoides
(Under Eriogonum fasciculatum var. fasciculatum)
Synonym
Eriogonum fasciculatum subsp. flavoviride
(Under Eriogonum fasciculatum var. flavoviride)
Synonym
Eriogonum fasciculatum subsp. foliolosum
(Under Eriogonum fasciculatum var. foliolosum)
Synonym
Eriogonum fasciculatum subsp. polifolium
(Under Eriogonum fasciculatum var. polifolium)
Synonym
Eriogonum fasciculatum var. aspalathoides
(Under Eriogonum fasciculatum var. fasciculatum)
Synonym
Eriogonum fasciculatum var. fasciculatumCOASTAL CALIFORNIA BUCKWHEATNative
Eriogonum fasciculatum var. flavovirideSONORAN DESERT CALIFORNIA BUCKWHEATNative
Eriogonum fasciculatum var. foliolosumLEAFY CALIFORNIA BUCKWHEATNative
Eriogonum fasciculatum var. maritimum
(Under Eriogonum fasciculatum var. fasciculatum)
Synonym
Eriogonum fasciculatum var. obtusiflorum
(Under Eriogonum fasciculatum var. foliolosum)
Synonym
Eriogonum fasciculatum var. oleifolium
(Under Eriogonum fasciculatum var. fasciculatum)
Synonym
Eriogonum fasciculatum var. polifoliumMOJAVE DESERT CALIFORNIA BUCKWHEATNative
Eriogonum fasciculatum var. revolutum
(Under Eriogonum fasciculatum var. polifolium)
Synonym
Eriogonum ferrissii
(Under Eriogonum umbellatum var. subaridum)
Synonym
Eriogonum flavissimum
(Under Eriogonum strictum var. anserinum)
Synonym
Eriogonum foliosum
(Under Eriogonum evanidum)
Noted name
Eriogonum foliosum
(Under Eriogonum evanidum)
Misapplied name
Eriogonum formosum
(Under Eriogonum giganteum var. formosum)
Synonym
Eriogonum friscanum
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum fruticosum var. ambiguum
(Under Eriogonum microtheca var. ambiguum)
Synonym
Eriogonum fulvum
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum geniculatum
(Under Eriogonum heermannii var. heermannii)
Illegitimate name
Eriogonum geniculatum
(Under Eriogonum sphaerocephalum var. sphaerocephalum)
Synonym
Eriogonum giganteumST. CATHERINE'S-LACENative
Eriogonum giganteum subsp. compactum
(Under Eriogonum giganteum var. compactum)
Synonym
Eriogonum giganteum subsp. formosum
(Under Eriogonum giganteum var. formosum)
Synonym
Eriogonum giganteum var. compactumSANTA BARBARA ISLAND BUCKWHEATNative
Eriogonum giganteum var. formosumSAN CLEMENTE ISLAND BUCKWHEATNative
Eriogonum giganteum var. giganteumSANTA CATALINA ISLAND BUCKWHEATNative
Eriogonum gilmaniiGILMAN'S BUCKWHEATNative
Eriogonum glaberrimum
(Under Eriogonum umbellatum var. glaberrimum)
Synonym
Eriogonum glandulosumGLANDULAR WILD BUCKWHEATNative
Eriogonum glandulosum var. carneum
(Under Eriogonum glandulosum)
Synonym
Eriogonum glaucum
(Under Eriogonum inflatum)
Synonym
Eriogonum gossypinumCOTTONY BUCKWHEATNative
Eriogonum gracileNative
Eriogonum gracile var. acetoselloides
(Under Eriogonum gracile var. gracile)
Synonym
Eriogonum gracile var. cithariforme
(Under Eriogonum cithariforme var. cithariforme)
Synonym
Eriogonum gracile var. effusum
(Under Eriogonum baileyi var. baileyi)
Synonym
Eriogonum gracile var. gracileSLENDER WOOLLY WILD BUCKWHEATNative
Eriogonum gracile var. incultumPALOMAR MOUNTAIN WILD BUCKWHEATNative
Eriogonum gracile var. leucocladon
(Under Eriogonum gracile var. gracile)
Synonym
Eriogonum gracile var. polygonoides
(Under Eriogonum cithariforme var. agninum)
Synonym
Eriogonum gracilipesWHITE MOUNTAINS WILD BUCKWHEATNative
Eriogonum gracillimumROSE-AND-WHITE WILD BUCKWHEATNative
Eriogonum gramineum
(Under Eriogonum nudum var. westonii)
Synonym
Eriogonum grandeNative
Eriogonum grande subsp. rubescens
(Under Eriogonum grande var. rubescens)
Synonym
Eriogonum grande subsp. timorum
(Under Eriogonum grande var. timorum)
Synonym
Eriogonum grande var. dunklei
(Under Eriogonum grande var. rubescens)
Synonym
Eriogonum grande var. grandeISLAND BUCKWHEATNative
Eriogonum grande var. rubescensRED-FLOWERED BUCKWHEATNative
Eriogonum grande var. timorumSAN NICOLAS ISLAND BUCKWHEATNative
Eriogonum greenei
(Under Eriogonum strictum var. greenei)
Synonym
Eriogonum gyrophyllum
(Under Eriogonum heracleoides var. heracleoides)
Synonym
Eriogonum halimioides
(Under Eriogonum sphaerocephalum var. halimioides)
Synonym
Eriogonum harfordii
(Under Eriogonum nudum var. oblongifolium)
Synonym
Eriogonum heermanniiNative
Eriogonum heermannii subsp. argense
(Under Eriogonum heermannii var. argense)
Synonym
Eriogonum heermannii subsp. floccosum
(Under Eriogonum heermannii var. floccosum)
Synonym
Eriogonum heermannii subsp. humilius
(Under Eriogonum heermannii var. humilius)
Synonym
Eriogonum heermannii subsp. occidentale
(Under Eriogonum heermannii var. occidentale)
Synonym
Eriogonum heermannii subsp. sulcatum
(Under Eriogonum heermannii var. sulcatum)
Synonym
Eriogonum heermannii var. argenseHEERMANN'S ROUGH WILD BUCKWHEATNative
Eriogonum heermannii var. floccosumCLARK MOUNTAIN BUCKWHEATNative
Eriogonum heermannii var. heermanniiHEERMANN'S WILD BUCKWHEATNative
Eriogonum heermannii var. humiliusHEERMANN'S GREAT BASIN WILD BUCKWHEATNative
Eriogonum heermannii var. occidentaleWESTERN HEERMANN'S BUCKWHEATNative
Eriogonum heermannii var. sulcatumHEERMANN'S GROOVED WILD BUCKWHEATNative
Eriogonum helianthemifolium
(Under Eriogonum wrightii var. wrightii)
Synonym
Eriogonum heracleoides subsp. angustifolium
(Under Eriogonum heracleoides var. heracleoides)
Synonym
Eriogonum heracleoides var. angustifolium
(Under Eriogonum heracleoides var. heracleoides)
Synonym
Eriogonum heracleoides var. heracleoidesPARSNIP-FLOWERED BUCKWHEATNative
Eriogonum heracleoides var. micranthum
(Under Eriogonum heracleoides var. heracleoides)
Synonym
Eriogonum heracleoides var. minus
(Under Eriogonum heracleoides var. heracleoides)
Synonym
Eriogonum heracleoides var. multiceps
(Under Eriogonum heracleoides var. heracleoides)
Synonym
Eriogonum heracleoides var. rydbergii
(Under Eriogonum heracleoides var. heracleoides)
Synonym
Eriogonum heracleoides var. utahense
(Under Eriogonum heracleoides var. heracleoides)
Synonym
Eriogonum heracleoides var. viride
(Under Eriogonum umbellatum var. nevadense)
Synonym
Eriogonum hirtellumKLAMATH MOUNTAIN BUCKWHEATNative
Eriogonum hirtiflorumHAIRY-FLOWER WILD BUCKWHEATNative
Eriogonum hoffmanniiNative
Eriogonum hoffmannii subsp. robustius
(Under Eriogonum hoffmannii var. robustius)
Synonym
Eriogonum hoffmannii var. hoffmanniiHOFFMANN'S BUCKWHEATNative
Eriogonum hoffmannii var. robustiusROBUST HOFFMANN'S BUCKWHEATNative
Eriogonum hookeriHOOKER'S WILD BUCKWHEATNative
Eriogonum howellii
(Under Eriogonum heermannii var. argense)
Synonym
Eriogonum howellii var. argense
(Under Eriogonum heermannii var. argense)
Synonym
Eriogonum incanumFROSTED WILD BUCKWHEATNative
Eriogonum indictum
(Under Eriogonum nudum var. indictum)
Synonym
Eriogonum inermeNative
Eriogonum inerme subsp. hispidulum
(Under Eriogonum inerme var. hispidulum)
Synonym
Eriogonum inerme var. hispidulumGOODMAN'S UNARMED WILD BUCKWHEATNative
Eriogonum inerme var. inermeUNARMED WILD BUCKWHEATNative
Eriogonum inflatumDESERT TRUMPETNative
Eriogonum inflatum subsp. lagunense
(Under Eriogonum inflatum)
Synonym
Eriogonum inflatum var. contiguum
(Under Eriogonum contiguum)
Synonym
Eriogonum inflatum var. deflatum
(Under Eriogonum inflatum)
Synonym
Eriogonum insigne
(Under Eriogonum deflexum var. deflexum)
Synonym
Eriogonum insigne
(Under Eriogonum exaltatum)
Misapplied name
Eriogonum intrafractumJOINTED BUCKWHEATNative
Eriogonum intricatum
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum johnstonii
(Under Eriogonum compositum var. compositum)
Synonym
Eriogonum junceum
(Under Eriogonum wrightii var. subscaposum)
Synonym
Eriogonum juncinellum
(Under Eriogonum davidsonii)
Synonym
Eriogonum kearneyi
(Under Eriogonum nummulare)
Synonym
Eriogonum kearneyi subsp. monoense
(Under Eriogonum nummulare)
Synonym
Eriogonum kearneyi var. monoense
(Under Eriogonum nummulare)
Synonym
Eriogonum kelloggiiKELLOGG'S BUCKWHEATNative
Eriogonum kennedyiNative
Eriogonum kennedyi f. alpigenum
(Under Eriogonum kennedyi var. alpigenum)
Synonym
Eriogonum kennedyi subsp. alpigenum
(Under Eriogonum kennedyi var. alpigenum)
Synonym
Eriogonum kennedyi subsp. austromontanum
(Under Eriogonum kennedyi var. austromontanum)
Synonym
Eriogonum kennedyi subsp. gracilipes
(Under Eriogonum gracilipes)
Synonym
Eriogonum kennedyi subsp. pinorum
(Under Eriogonum wrightii var. subscaposum)
Synonym
Eriogonum kennedyi subsp. purpusii
(Under Eriogonum kennedyi var. purpusii)
Synonym
Eriogonum kennedyi var. alpigenumSOUTHERN ALPINE BUCKWHEATNative
Eriogonum kennedyi var. austromontanumSOUTHERN MOUNTAIN BUCKWHEATNative
Eriogonum kennedyi var. kennedyiKENNEDY'S WILD BUCKWHEATNative
Eriogonum kennedyi var. olanchense
(Under Eriogonum wrightii var. olanchense)
Synonym
Eriogonum kennedyi var. pinicolaKERN BUCKWHEATNative
Eriogonum kennedyi var. purpusiiPURPUS' WILD BUCKWHEATNative
Eriogonum lagunense
(Under Eriogonum inflatum)
Synonym
Eriogonum lanatum
(Under Hollisteria lanata)
Synonym
Eriogonum latensINYO WILD BUCKWHEATNative
Eriogonum latifoliumSEASIDE WILD BUCKWHEATNative
Eriogonum latifolium subsp. auriculatum
(Under Eriogonum nudum var. auriculatum)
Synonym
Eriogonum latifolium subsp. decurrens
(Under Eriogonum nudum var. decurrens)
Synonym
Eriogonum latifolium subsp. deductum
(Under Eriogonum nudum var. deductum)
Synonym
Eriogonum latifolium subsp. grande
(Under Eriogonum grande var. grande)
Synonym
Eriogonum latifolium subsp. nudum
(Under Eriogonum nudum var. nudum)
Synonym
Eriogonum latifolium subsp. pauciflorum
(Under Eriogonum nudum var. pauciflorum)
Synonym
Eriogonum latifolium subsp. rubescens
(Under Eriogonum grande var. rubescens)
Synonym
Eriogonum latifolium subsp. saxicola
(Under Eriogonum nudum var. westonii)
Synonym
Eriogonum latifolium subsp. sulphureum
(Under Eriogonum nudum var. oblongifolium)
Synonym
Eriogonum latifolium subsp. westonii
(Under Eriogonum nudum var. westonii)
Synonym
Eriogonum latifolium var. affine
(Under Eriogonum nudum var. oblongifolium)
Illegitimate name
Eriogonum latifolium var. alternans
(Under Eriogonum nudum var. auriculatum)
Synonym
Eriogonum latifolium var. harfordii
(Under Eriogonum nudum var. oblongifolium)
Synonym
Eriogonum latifolium var. indictum
(Under Eriogonum nudum var. indictum)
Synonym
Eriogonum latifolium var. parvulum
(Under Eriogonum nudum var. nudum)
Synonym
Eriogonum latifolium var. rubescens
(Under Eriogonum grande var. rubescens)
Synonym
Eriogonum latifolium var. scapigerum
(Under Eriogonum nudum var. scapigerum)
Synonym
Eriogonum latum
(Under Eriogonum umbellatum var. dichrocephalum)
Synonym
Eriogonum leucocladon
(Under Eriogonum gracile var. gracile)
Synonym
Eriogonum leucocladum
(Under Eriogonum baileyi var. praebens)
Synonym
Eriogonum libertiniDUBAKELLA MOUNTAIN BUCKWHEATNative
Eriogonum lobbiiLOBB'S WILD BUCKWHEATNative
Eriogonum lobbii var. lobbii
(Under Eriogonum lobbii)
Synonym
Eriogonum lobbii var. minus
(Under Eriogonum lobbii)
Synonym
Eriogonum longulum
(Under Eriogonum nudum var. nudum)
Synonym
Eriogonum luteolumNative
Eriogonum luteolum (Coville) of auth. non Greene
(Under Gilmania luteola)
Illegitimate name
Eriogonum luteolum var. caninumTIBURON BUCKWHEATNative
Eriogonum luteolum var. luteolumGOLDEN-CARPET WILD BUCKWHEATNative
Eriogonum luteolum var. pedunculatumMOKELUMNE HILL WILD BUCKWHEATNative
Eriogonum luteolum var. saltuariumJACK'S WILD BUCKWHEATNative
Eriogonum macdougalii
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum maculatumSPOTTED WILD BUCKWHEATNative
Eriogonum marifoliumNative
Eriogonum marifolium var. apertum
(Under Eriogonum marifolium var. marifolium)
Synonym
Eriogonum marifolium var. cupulatumMCCLOUD WILD BUCKWHEATNative
Eriogonum marifolium var. incanum
(Under Eriogonum incanum)
Synonym
Eriogonum marifolium var. marifoliumMARUM-LEAF WILD BUCKWHEATNative
Eriogonum mensicolaPINYON MESA BUCKWHEATNative
Eriogonum microthecaNative
Eriogonum microtheca subsp. confertiflorum
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum microtheca subsp. intermedium
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum microtheca subsp. intricatum
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum microtheca subsp. laxiflorum
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum microtheca subsp. macdougalii
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum microtheca subsp. rigidum
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum microtheca subsp. spathulare
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum microtheca var. alpinumNORTHERN LIMESTONE BUCKWHEATNative
Eriogonum microtheca var. ambiguumYELLOW-FLOWERED WILD BUCKWHEATNative
Eriogonum microtheca var. confertiflorum
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum microtheca var. corymbosoidesSAN BERNARDINO WILD BUCKWHEATNative
Eriogonum microtheca var. expansum
(Under Eriogonum microtheca var. ambiguum)
Synonym
Eriogonum microtheca var. foliosum
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum microtheca var. friscanum
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum microtheca var. johnstoniiJOHNSTON'S BUCKWHEATNative
Eriogonum microtheca var. lacus-ursiBEAR LAKE BUCKWHEATNative
Eriogonum microtheca var. lapidicolaINYO MOUNTAINS BUCKWHEATNative
Eriogonum microtheca var. laxiflorumGREAT BASIN WILD BUCKWHEATNative
Eriogonum microtheca var. macdougalii
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum microtheca var. panamintensePANAMINT MOUNTAINS BUCKWHEATNative
Eriogonum microtheca var. rigidum
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum microtheca var. schoolcraftiiSCHOOLCRAFT'S WILD BUCKWHEATNative
Eriogonum microtheca var. simpsoniiSIMPSON'S WILD BUCKWHEATNative
Eriogonum microtheca var. spathulare
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum minus
(Under Eriogonum umbellatum var. minus)
Synonym
Eriogonum minutiflorum
(Under Eriogonum thomasii)
Synonym
Eriogonum modocense
(Under Eriogonum umbellatum var. modocense)
Synonym
Eriogonum mohavenseWESTERN MOJAVE WILD BUCKWHEATNative
Eriogonum mohavense subsp. ampullaceum
(Under Eriogonum ampullaceum)
Synonym
Eriogonum molestumPINELAND WILD BUCKWHEATNative
Eriogonum molestum var. davidsonii
(Under Eriogonum davidsonii)
Synonym
Eriogonum monticola
(Under Eriogonum latens)
Synonym
Eriogonum nelsonii
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum nemacaulis
(Under Nemacaulis denudata var. denudata)
Synonym
Eriogonum nervulosumSNOW MOUNTAIN BUCKWHEATNative
Eriogonum nevadense
(Under Eriogonum ochrocephalum var. ochrocephalum)
Synonym
Eriogonum nidulariumBIRDNEST WILD BUCKWHEATNative
Eriogonum nidularium var. luciense
(Under Eriogonum nidularium)
Synonym
Eriogonum nivale
(Under Eriogonum ovalifolium var. nivale)
Synonym
Eriogonum nodosum
(Under Eriogonum wrightii var. nodosum)
Synonym
Eriogonum nodosum subsp. monoense
(Under Eriogonum nummulare)
Synonym
Eriogonum nodosum var. jaegeri
(Under Eriogonum plumatella)
Synonym
Eriogonum nodosum var. kearneyi
(Under Eriogonum nummulare)
Synonym
Eriogonum nortoniiPINNACLES BUCKWHEATNative
Eriogonum nudumNative
Eriogonum nudum subsp. pauciflorum
(Under Eriogonum nudum var. pauciflorum)
Synonym
Eriogonum nudum subsp. saxicola
(Under Eriogonum nudum var. westonii)
Synonym
Eriogonum nudum var. auriculatumEAR-SHAPED WILD BUCKWHEATNative
Eriogonum nudum var. decurrensBEN LOMOND BUCKWHEATNative
Eriogonum nudum var. deductumREDUCED WILD BUCKWHEATNative
Eriogonum nudum var. gramineum
(Under Eriogonum nudum var. westonii)
Synonym
Eriogonum nudum var. grande
(Under Eriogonum grande var. grande)
Synonym
Eriogonum nudum var. indictumPROTRUDING BUCKWHEATNative
Eriogonum nudum var. murinumMOUSE BUCKWHEATNative
Eriogonum nudum var. nudumNAKED WILD BUCKWHEATNative
Eriogonum nudum var. oblongifoliumHARFORD'S WILD BUCKWHEATNative
Eriogonum nudum var. paralinumDEL NORTE BUCKWHEATNative
Eriogonum nudum var. pauciflorumLITTLE-FLOWER WILD BUCKWHEATNative
Eriogonum nudum var. perturbum
(Under Eriogonum nudum var. pauciflorum)
Illegitimate name
Eriogonum nudum var. psychicolaANTIOCH DUNES BUCKWHEATNative
Eriogonum nudum var. pubiflorumFREMONT'S WILD BUCKWHEATNative
Eriogonum nudum var. regirivumKINGS RIVER BUCKWHEATNative
Eriogonum nudum var. scapigerumSIERRAN CREST WILD BUCKWHEATNative
Eriogonum nudum var. sulphureum
(Under Eriogonum nudum var. oblongifolium)
Synonym
Eriogonum nudum var. westoniiWESTON'S WILD BUCKWHEATNative
Eriogonum nummulareMONEY WILD BUCKWHEATNative
Eriogonum nutansNative
Eriogonum nutans var. brevipedicellatum
(Under Eriogonum nutans var. nutans)
Synonym
Eriogonum nutans var. glabratumDEETH WILD BUCKWHEATExtirpated alien
Eriogonum nutans var. nutansDUGWAY WILD BUCKWHEATNative
Eriogonum oblanceolatum
(Under Eriogonum nudum var. nudum)
Synonym
Eriogonum oblongifolium
(Under Eriogonum latifolium)
Synonym
Eriogonum oblongifolium var. minus
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum ochrocephalum subsp. agnellum
(Under Eriogonum rosense var. rosense)
Synonym
Eriogonum ochrocephalum var. agnellum
(Under Eriogonum rosense var. rosense)
Synonym
Eriogonum ochrocephalum var. breedlovei
(Under Eriogonum breedlovei var. breedlovei)
Synonym
Eriogonum ochrocephalum var. gracilipes
(Under Eriogonum gracilipes)
Synonym
Eriogonum ochrocephalum var. ochrocephalumOCHRE-FLOWERED BUCKWHEATNative
Eriogonum ordiiFORT MOHAVE WILD BUCKWHEATNative
Eriogonum orthocaulon
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum ovalifoliumNative
Eriogonum ovalifolium subsp. flavissimum
(Under Eriogonum strictum var. anserinum)
Synonym
Eriogonum ovalifolium subsp. purpureum
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum ovalifolium subsp. vineum
(Under Eriogonum ovalifolium var. vineum)
Synonym
Eriogonum ovalifolium var. anserinum
(Under Eriogonum strictum var. anserinum)
Synonym
Eriogonum ovalifolium var. bellum
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum ovalifolium var. caelestinumHEAVENLY WILD BUCKWHEATNative
Eriogonum ovalifolium var. celsum
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum ovalifolium var. cerastoides
(Under Eriogonum ovalifolium var. ovalifolium)
Synonym
Eriogonum ovalifolium var. cyclophyllum
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum ovalifolium var. deltoideum
(Under Eriogonum ovalifolium var. ovalifolium)
Synonym
Eriogonum ovalifolium var. depressumDEPRESSED WILD BUCKWHEATNative
Eriogonum ovalifolium var. eximiumBROWN-MARGINED BUCKWHEATNative
Eriogonum ovalifolium var. monarchenseMONARCH BUCKWHEATNative
Eriogonum ovalifolium var. multiscapum
(Under Eriogonum ovalifolium var. ovalifolium)
Synonym
Eriogonum ovalifolium var. nevadense
(Under Eriogonum ovalifolium var. ovalifolium)
Synonym
Eriogonum ovalifolium var. nivaleSIERRAN CUSHION WILD BUCKWHEATNative
Eriogonum ovalifolium var. orthocaulon
(Under Eriogonum ovalifolium var. purpureum)
Illegitimate name
Eriogonum ovalifolium var. ovalifoliumCUSHION WILD BUCKWHEATNative
Eriogonum ovalifolium var. proliferum
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum ovalifolium var. purpureumPURPLE CUSHION WILD BUCKWHEATNative
Eriogonum ovalifolium var. utahense
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum ovalifolium var. vineumCUSHENBURY BUCKWHEATNative
Eriogonum ovatum
(Under Eriogonum ursinum var. ursinum)
Synonym
Eriogonum palmeri
(Under Eriogonum plumatella)
Synonym
Eriogonum palmerianumPALMER'S WILD BUCKWHEATNative
Eriogonum panamintensePANAMINT MOUNTAIN WILD BUCKWHEATNative
Eriogonum panamintense subsp. mensicola
(Under Eriogonum mensicola)
Synonym
Eriogonum panamintense var. mensicola
(Under Eriogonum mensicola)
Synonym
Eriogonum panduratum
(Under Eriogonum thurberi)
Synonym
Eriogonum parishiiPARISH'S WILD BUCKWHEATNative
Eriogonum parryi
(Under Eriogonum brachypodum)
Synonym
Eriogonum parvifoliumSEACLIFF WILD BUCKWHEATNative
Eriogonum parvifolium subsp. lucidum
(Under Eriogonum parvifolium)
Synonym
Eriogonum parvifolium subsp. paynei
(Under Eriogonum parvifolium)
Synonym
Eriogonum parvifolium var. crassifolium
(Under Eriogonum parvifolium)
Synonym
Eriogonum parvifolium var. lucidum
(Under Eriogonum parvifolium)
Synonym
Eriogonum parvifolium var. paynei
(Under Eriogonum parvifolium)
Synonym
Eriogonum pedunculatum
(Under Eriogonum luteolum var. pedunculatum)
Synonym
Eriogonum pendulumWALDO WILD BUCKWHEATNative
Eriogonum pendulum var. confertum
(Under Eriogonum pendulum)
Synonym
Eriogonum perfoliatum
(Under Oxytheca perfoliata)
Synonym
Eriogonum pilicaule
(Under Eriogonum compositum var. compositum)
Synonym
Eriogonum plumatellaYUCCA WILD BUCKWHEATNative
Eriogonum plumatella var. jaegeri
(Under Eriogonum plumatella)
Synonym
Eriogonum plumatella var. palmeri
(Under Eriogonum palmerianum)
Synonym
Eriogonum polifolium
(Under Eriogonum fasciculatum var. polifolium)
Synonym
Eriogonum polyanthum
(Under Eriogonum umbellatum var. polyanthum)
Synonym
Eriogonum polyanthum var. bahiiforme
(Under Eriogonum umbellatum var. bahiiforme)
Synonym
Eriogonum polycladonSORREL WILD BUCKWHEATExtirpated alien
Eriogonum polycladon var. crispum
(Under Eriogonum polycladon)
Synonym
Eriogonum polycladon var. mexicanum
(Under Eriogonum polycladon)
Synonym
Eriogonum polypodumTULARE COUNTY BUCKWHEATNative
Eriogonum praebens
(Under Eriogonum baileyi var. praebens)
Synonym
Eriogonum praebens var. divaricatum
(Under Eriogonum baileyi var. praebens)
Synonym
Eriogonum pratense
(Under Eriogonum spergulinum var. pratense)
Synonym
Eriogonum prattenianumNative
Eriogonum prattenianum var. aviumKETTLE DOME BUCKWHEATNative
Eriogonum prattenianum var. prattenianumNEVADA CITY WILD BUCKWHEATNative
Eriogonum pringlei
(Under Eriogonum wrightii var. nodosum)
Synonym
Eriogonum prociduumPROSTRATE BUCKWHEATNative
Eriogonum prociduum var. prociduum
(Under Eriogonum prociduum)
Synonym
Eriogonum proliferum
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum proliferum subsp. anserinum
(Under Eriogonum strictum var. anserinum)
Synonym
Eriogonum puberulum
(Under Johanneshowellia puberula)
Synonym
Eriogonum puberulum var. venosum
(Under Johanneshowellia puberula)
Synonym
Eriogonum purpureum
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum purpusii
(Under Eriogonum kennedyi var. purpusii)
Synonym
Eriogonum pusillumYELLOW TURBANSNative
Eriogonum pyrolifoliumNative
Eriogonum pyrolifolium subsp. coryphaeum
(Under Eriogonum pyrolifolium var. coryphaeum)
Synonym
Eriogonum pyrolifolium var. bellingeranum
(Under Eriogonum pyrolifolium var. pyrolifolium)
Synonym
Eriogonum pyrolifolium var. coryphaeumHAIRY SHASTA WILD BUCKWHEATNative
Eriogonum pyrolifolium var. pyrolifoliumPYROLA-LEAVED BUCKWHEATNative
Eriogonum racemosum var. desertorum
(Under Eriogonum panamintense)
Synonym
Eriogonum reclinatum
(Under Eriogonum umbellatum var. nevadense)
Synonym
Eriogonum reliquum
(Under Eriogonum panamintense)
Synonym
Eriogonum reniformeKIDNEY-LEAF WILD BUCKWHEATNative
Eriogonum reniforme subsp. pusillum
(Under Eriogonum pusillum)
Synonym
Eriogonum reniforme var. asarifolium
(Under Eriogonum pusillum)
Synonym
Eriogonum reniforme var. comosum
(Under Eriogonum reniforme)
Synonym
Eriogonum reniforme var. playanum
(Under Eriogonum pusillum)
Synonym
Eriogonum restioides
(Under Eriogonum baileyi var. baileyi)
Synonym
Eriogonum revolutum
(Under Eriogonum fasciculatum var. polifolium)
Synonym
Eriogonum rhodanthum
(Under Eriogonum ovalifolium var. eximium)
Synonym
Eriogonum rixfordiiPAGODA WILD BUCKWHEATNative
Eriogonum roseiflorum
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eriogonum rosense var. beatleyae
(Under Eriogonum rosense var. rosense)
Misapplied name
Eriogonum rosense var. rosenseMOUNT ROSE WILD BUCKWHEATNative
Eriogonum roseumWAND WILD BUCKWHEATNative
Eriogonum roseum var. leucocladon
(Under Eriogonum gracile var. gracile)
Synonym
Eriogonum rosmarinifolium
(Under Eriogonum fasciculatum var. fasciculatum)
Synonym
Eriogonum rosmarinifolium var. foliolosum
(Under Eriogonum fasciculatum var. foliolosum)
Synonym
Eriogonum rosulatum
(Under Eriogonum incanum)
Synonym
Eriogonum rubescens
(Under Eriogonum grande var. rubescens)
Synonym
Eriogonum rubiflorum
(Under Eriogonum nutans var. nutans)
Synonym
Eriogonum rupinumWYMAN CREEK WILD BUCKWHEATNative
Eriogonum saxatileHOARY WILD BUCKWHEATNative
Eriogonum saxatile subsp. multicaule
(Under Eriogonum saxatile)
Synonym
Eriogonum saxatile var. crocatum
(Under Eriogonum crocatum)
Synonym
Eriogonum saxatile var. stokesae
(Under Eriogonum saxatile)
Synonym
Eriogonum saxicola
(Under Eriogonum nudum var. westonii)
Synonym
Eriogonum scapigerum
(Under Eriogonum nudum var. scapigerum)
Synonym
Eriogonum sericoleucum
(Under Eriogonum caespitosum)
Synonym
Eriogonum shockleyi var. shockleyiSHOCKLEY'S BUCKWHEATNative
Eriogonum shoshonense
(Under Eriogonum vimineum)
Synonym
Eriogonum simpsonii
(Under Eriogonum microtheca var. simpsonii)
Synonym
Eriogonum siskiyouenseSISKIYOU BUCKWHEATNative
Eriogonum smallianum
(Under Eriogonum umbellatum var. smallianum)
Synonym
Eriogonum spathulare
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum speciosum
(Under Eriogonum umbellatum var. speciosum)
Synonym
Eriogonum spectabileBARRON'S BUCKWHEATNative
Eriogonum spergulinumNative
Eriogonum spergulinum subsp. reddingianum
(Under Eriogonum spergulinum var. reddingianum)
Synonym
Eriogonum spergulinum var. pratenseMOUNTAIN MEADOW WILD BUCKWHEATNative
Eriogonum spergulinum var. reddingianumREDDING'S WILD BUCKWHEATNative
Eriogonum spergulinum var. spergulinumSPURRY WILD BUCKWHEATNative
Eriogonum sphaerocephalumNative
Eriogonum sphaerocephalum var. brevifolium
(Under Eriogonum tripodum)
Synonym
Eriogonum sphaerocephalum var. geniculatum
(Under Eriogonum sphaerocephalum var. sphaerocephalum)
Synonym
Eriogonum sphaerocephalum var. halimioidesHALIMIUM WILD BUCKWHEATNative
Eriogonum sphaerocephalum var. megacephalum
(Under Eriogonum sphaerocephalum var. sphaerocephalum)
Synonym
Eriogonum sphaerocephalum var. sericoleucum
(Under Eriogonum caespitosum)
Synonym
Eriogonum sphaerocephalum var. sphaerocephalumROCK WILD BUCKWHEATNative
Eriogonum spinescens
(Under Goodmania luteola)
Synonym
Eriogonum stellatum var. bahiiforme
(Under Eriogonum umbellatum var. bahiiforme)
Synonym
Eriogonum stokesae
(Under Eriogonum saxatile)
Synonym
Eriogonum strictumNative
Eriogonum strictum subsp. anserinum
(Under Eriogonum strictum var. anserinum)
Synonym
Eriogonum strictum subsp. bellum
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum strictum subsp. proliferum
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum strictum var. anserinumGOOSE LAKE WILD BUCKWHEATNative
Eriogonum strictum var. argenteum
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum strictum var. cusickianum
(Under Eriogonum strictum var. proliferum)
Illegitimate name
Eriogonum strictum var. cusickii
(Under Eriogonum strictum var. proliferum)
Synonym
Eriogonum strictum var. flavissimum
(Under Eriogonum strictum var. anserinum)
Synonym
Eriogonum strictum var. glabrum
(Under Eriogonum strictum)
Synonym
Eriogonum strictum var. greeneiGREENE'S BUCKWHEATNative
Eriogonum strictum var. proliferumPROLIFEROUS WILD BUCKWHEATNative
Eriogonum subalpinum var. arachnoideum
(Under Eriogonum umbellatum var. dichrocephalum)
Synonym
Eriogonum suffrutescens
(Under Eriogonum wrightii var. subscaposum)
Synonym
Eriogonum sulcatum
(Under Eriogonum heermannii var. sulcatum)
Synonym
Eriogonum sulcatum var. argense
(Under Eriogonum heermannii var. argense)
Synonym
Eriogonum sulphureum
(Under Eriogonum nudum var. oblongifolium)
Synonym
Eriogonum temblorenseTEMBLOR BUCKWHEATNative
Eriogonum tenellum
(Under Eriogonum ovalifolium var. purpureum)
Illegitimate name
Eriogonum tenellum var. erianthum
(Under Eriogonum microtheca var. ambiguum)
Synonym
Eriogonum tenellum var. grandiflorum
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum tenellum var. sessiliflorum
(Under Eriogonum microtheca var. laxiflorum)
Synonym
Eriogonum tenuissimum
(Under Eriogonum ordii)
Synonym
Eriogonum ternatumTERNATE BUCKWHEATNative
Eriogonum ternatum var. congdonii
(Under Eriogonum congdonii)
Synonym
Eriogonum thomasiiTHOMAS' WILD BUCKWHEATNative
Eriogonum thorneiTHORNE'S BUCKWHEATNative
Eriogonum thurberiTHURBER'S WILD BUCKWHEATNative
Eriogonum thurberi var. acutangulum
(Under Eriogonum maculatum)
Synonym
Eriogonum thurberi var. parishii
(Under Eriogonum thurberi)
Synonym
Eriogonum torreyanum
(Under Eriogonum umbellatum var. torreyanum)
Synonym
Eriogonum trachygonum
(Under Eriogonum wrightii var. trachygonum)
Synonym
Eriogonum trachygonum subsp. glomerulum
(Under Eriogonum wrightii var. wrightii)
Synonym
Eriogonum trachygonum subsp. membranaceum
(Under Eriogonum wrightii var. membranaceum)
Synonym
Eriogonum trachygonum subsp. pringlei
(Under Eriogonum wrightii var. nodosum)
Synonym
Eriogonum trachygonum subsp. subscaposum
(Under Eriogonum wrightii var. subscaposum)
Synonym
Eriogonum trachygonum subsp. wrightii
(Under Eriogonum wrightii var. wrightii)
Synonym
Eriogonum trachygonum var. subscaposum
(Under Eriogonum wrightii var. subscaposum)
Synonym
Eriogonum trichopesLITTLE DESERT TRUMPETNative
Eriogonum trichopes subsp. clavatum
(Under Eriogonum clavatum)
Synonym
Eriogonum trichopes subsp. glaucum
(Under Eriogonum inflatum)
Synonym
Eriogonum trichopes var. hooveri
(Under Eriogonum clavatum)
Synonym
Eriogonum trichopes var. minus
(Under Eriogonum trichopes)
Synonym
Eriogonum trichopes var. trichopes
(Under Eriogonum trichopes)
Synonym
Eriogonum trichopodum
(Under Eriogonum trichopes)
Illegitimate name
Eriogonum trichotomum
(Under Eriogonum umbellatum var. bahiiforme)
Synonym
Eriogonum trilobatum
(Under Sidotheca trilobata)
Synonym
Eriogonum tripodumTRIPOD BUCKWHEATNative
Eriogonum truncatumMOUNT DIABLO BUCKWHEATNative
Eriogonum truncatum var. adsurgens
(Under Eriogonum eastwoodianum)
Synonym
Eriogonum turbinatum
(Under Eriogonum deflexum var. deflexum)
Synonym
Eriogonum twisselmanniiTWISSELMANN'S BUCKWHEATNative
Eriogonum umbellatumSULPHUR FLOWERNative
Eriogonum umbellatum subsp. aridum
(Under Eriogonum umbellatum var. dichrocephalum)
Synonym
Eriogonum umbellatum subsp. bahiiforme
(Under Eriogonum umbellatum var. bahiiforme)
Synonym
Eriogonum umbellatum subsp. covillei
(Under Eriogonum umbellatum var. covillei)
Synonym
Eriogonum umbellatum subsp. dumosum
(Under Eriogonum umbellatum var. dumosum)
Synonym
Eriogonum umbellatum subsp. ferrissii
(Under Eriogonum umbellatum var. subaridum)
Synonym
Eriogonum umbellatum subsp. minus
(Under Eriogonum umbellatum var. minus)
Synonym
Eriogonum umbellatum subsp. munzii
(Under Eriogonum umbellatum var. munzii)
Synonym
Eriogonum umbellatum subsp. polyanthum
(Under Eriogonum umbellatum var. polyanthum)
Synonym
Eriogonum umbellatum subsp. serratum
(Under Eriogonum prattenianum var. prattenianum)
Synonym
Eriogonum umbellatum subsp. subaridum
(Under Eriogonum umbellatum var. subaridum)
Synonym
Eriogonum umbellatum subsp. versicolor
(Under Eriogonum umbellatum var. versicolor)
Synonym
Eriogonum umbellatum var. ahartiiAHART'S BUCKWHEATNative
Eriogonum umbellatum var. argusONE-EYED SULPHUR FLOWERNative
Eriogonum umbellatum var. aridum
(Under Eriogonum umbellatum var. dichrocephalum)
Synonym
Eriogonum umbellatum var. bahiiformeBAY BUCKWHEATNative
Eriogonum umbellatum var. bahiiforme
(Under Eriogonum umbellatum var. smallianum)
Misapplied name, in part
Eriogonum umbellatum var. californicum
(Under Eriogonum umbellatum var. nevadense)
Synonym
Eriogonum umbellatum var. canifoliumSHERMAN PASS SULPHUR FLOWERNative
Eriogonum umbellatum var. chlorothamnusSHERWIN GRADE SULPHUR FLOWERNative
Eriogonum umbellatum var. covilleiCOVILLE'S SULPHUR FLOWERNative
Eriogonum umbellatum var. dichrocephalumBICOLOR SULPHUR FLOWERNative
Eriogonum umbellatum var. dumosumAMERICAN VALLEY SULPHUR FLOWERNative
Eriogonum umbellatum var. furcosumSIERRA NEVADA SULPHUR FLOWERNative
Eriogonum umbellatum var. glaberrimumWARNER MOUNTAINS BUCKWHEATNative
Eriogonum umbellatum var. goodmaniiGOODMAN'S SULPHUR FLOWERNative
Eriogonum umbellatum var. humistratumMOUNT EDDY BUCKWHEATNative
Eriogonum umbellatum var. juniporinumJUNIPER SULPHUR-FLOWERED BUCKWHEATNative
Eriogonum umbellatum var. lautumSCOTT VALLEY BUCKWHEATNative
Eriogonum umbellatum var. minusALPINE SULPHUR-FLOWERED BUCKWHEATNative
Eriogonum umbellatum var. modocenseMODOC SULPHUR FLOWERNative
Eriogonum umbellatum var. munziiMUNZ'S SULPHUR FLOWERNative
Eriogonum umbellatum var. nelsoniorumNELSONS' SULPHUR FLOWERNative
Eriogonum umbellatum var. nevadenseNEVADA SULPHUR FLOWERNative
Eriogonum umbellatum var. polyanthumAMERICAN RIVER SULPHUR FLOWERNative
Eriogonum umbellatum var. polyanthum
(Under Eriogonum umbellatum var. dumosum)
Synonym, in part
Eriogonum umbellatum var. polyanthum
(Under Eriogonum umbellatum var. modocense)
Synonym, in part
Eriogonum umbellatum var. polypodum
(Under Eriogonum polypodum)
Synonym
Eriogonum umbellatum var. smallianumSMALL'S SULPHUR FLOWERNative
Eriogonum umbellatum var. speciosumBEAUTIFUL SULPHUR FLOWERNative
Eriogonum umbellatum var. subaridumFERRIS' SULPHUR FLOWERNative
Eriogonum umbellatum var. torreyanumDONNER PASS BUCKWHEATNative
Eriogonum umbellatum var. versicolorPANAMINT SULPHUR FLOWERNative
Eriogonum ursinumNative
Eriogonum ursinum var. confine
(Under Eriogonum ternatum)
Synonym
Eriogonum ursinum var. congdonii
(Under Eriogonum congdonii)
Synonym
Eriogonum ursinum var. covillei
(Under Eriogonum umbellatum var. covillei)
Synonym
Eriogonum ursinum var. erubescensBLUSHING WILD BUCKWHEATNative
Eriogonum ursinum var. nervulosum
(Under Eriogonum nervulosum)
Synonym
Eriogonum ursinum var. rosulatum
(Under Eriogonum incanum)
Synonym
Eriogonum ursinum var. siskiyouense
(Under Eriogonum siskiyouense)
Synonym
Eriogonum ursinum var. ursinumBEAR VALLEY WILD BUCKWHEATNative
Eriogonum ursinum var. venosum
(Under Eriogonum polypodum)
Synonym
Eriogonum vagans
(Under Eriogonum inerme var. inerme)
Synonym
Eriogonum variabile
(Under Eriogonum gracillimum)
Synonym
Eriogonum verticillatum
(Under Eriogonum gracile var. gracile)
Synonym
Eriogonum vestitumIDRIA BUCKWHEATNative
Eriogonum vimineumWICKER-STEM WILD BUCKWHEATNative
Eriogonum vimineum subsp. adsurgens
(Under Eriogonum eastwoodianum)
Synonym
Eriogonum vimineum subsp. baileyi
(Under Eriogonum baileyi var. baileyi)
Synonym
Eriogonum vimineum subsp. gracile
(Under Eriogonum gracile var. gracile)
Synonym
Eriogonum vimineum subsp. molestum
(Under Eriogonum molestum)
Synonym
Eriogonum vimineum subsp. nidularium
(Under Eriogonum nidularium)
Synonym
Eriogonum vimineum subsp. nortonii
(Under Eriogonum nortonii)
Synonym
Eriogonum vimineum subsp. polycladon
(Under Eriogonum polycladon)
Synonym
Eriogonum vimineum subsp. polygonoides
(Under Eriogonum cithariforme var. agninum)
Synonym
Eriogonum vimineum subsp. virgatum
(Under Eriogonum roseum)
Synonym
Eriogonum vimineum var. agninum
(Under Eriogonum cithariforme var. agninum)
Synonym
Eriogonum vimineum var. avicularia
(Under Eriogonum davidsonii)
Synonym
Eriogonum vimineum var. baileyi
(Under Eriogonum baileyi var. baileyi)
Synonym
Eriogonum vimineum var. brachyanthum
(Under Eriogonum brachyanthum)
Synonym
Eriogonum vimineum var. californicum
(Under Eriogonum luteolum var. luteolum)
Synonym
Eriogonum vimineum var. caninum
(Under Eriogonum luteolum var. caninum)
Synonym
Eriogonum vimineum var. cithariforme
(Under Eriogonum cithariforme var. cithariforme)
Synonym
Eriogonum vimineum var. commixtum
(Under Eriogonum baileyi var. praebens)
Synonym
Eriogonum vimineum var. covilleanum
(Under Eriogonum covilleanum)
Synonym
Eriogonum vimineum var. davidsonii
(Under Eriogonum davidsonii)
Synonym
Eriogonum vimineum var. densum
(Under Eriogonum polycladon)
Synonym
Eriogonum vimineum var. divergens
(Under Eriogonum vimineum)
Synonym
Eriogonum vimineum var. elegans
(Under Eriogonum elegans)
Synonym
Eriogonum vimineum var. eriocladon
(Under Eriogonum dasyanthemum)
Synonym
Eriogonum vimineum var. glabrum
(Under Eriogonum davidsonii)
Synonym
Eriogonum vimineum var. luteolum
(Under Eriogonum luteolum var. luteolum)
Synonym
Eriogonum vimineum var. multiradiatum
(Under Eriogonum baileyi var. baileyi)
Synonym
Eriogonum vimineum var. nidularium
(Under Eriogonum nidularium)
Synonym
Eriogonum vimineum var. oregonense
(Under Eriogonum vimineum)
Synonym
Eriogonum vimineum var. porphyreticum
(Under Eriogonum baileyi var. baileyi)
Synonym
Eriogonum vimineum var. restioides
(Under Eriogonum baileyi var. baileyi)
Synonym
Eriogonum vimineum var. rigescens
(Under Eriogonum vimineum)
Synonym
Eriogonum vimineum var. shoshonense
(Under Eriogonum vimineum)
Synonym
Eriogonum vineum
(Under Eriogonum ovalifolium var. vineum)
Synonym
Eriogonum virgatum
(Under Eriogonum roseum)
Synonym
Eriogonum virgatum var. roseum
(Under Eriogonum roseum)
Synonym
Eriogonum virgatum var. rubidum
(Under Eriogonum roseum)
Synonym
Eriogonum viridescensTWO-TOOTHED WILD BUCKWHEATNative
Eriogonum wrightiiBASTARD-SAGENative
Eriogonum wrightii subsp. glomerulum
(Under Eriogonum wrightii var. wrightii)
Synonym
Eriogonum wrightii subsp. membranaceum
(Under Eriogonum wrightii var. membranaceum)
Synonym
Eriogonum wrightii subsp. nodosum
(Under Eriogonum wrightii var. nodosum)
Synonym
Eriogonum wrightii subsp. pringlei
(Under Eriogonum wrightii var. nodosum)
Synonym
Eriogonum wrightii subsp. subscaposum
(Under Eriogonum wrightii var. subscaposum)
Synonym
Eriogonum wrightii subsp. trachygonum
(Under Eriogonum wrightii var. trachygonum)
Synonym
Eriogonum wrightii var. curvatum
(Under Eriogonum wrightii var. subscaposum)
Synonym
Eriogonum wrightii var. floccosum
(Under Eriogonum wrightii var. wrightii)
Synonym
Eriogonum wrightii var. helianthemifolium
(Under Eriogonum wrightii var. wrightii)
Synonym
Eriogonum wrightii var. membranaceumRINGED-STEM BASTARD-SAGENative
Eriogonum wrightii var. nodosumKNOT-STEM BASTARD-SAGENative
Eriogonum wrightii var. olanchenseOLANCHA PEAK BUCKWHEATNative
Eriogonum wrightii var. pringlei
(Under Eriogonum wrightii var. nodosum)
Synonym
Eriogonum wrightii var. subscaposumSHORT-STEMMED BASTARD-SAGENative
Eriogonum wrightii var. trachygonumROUGH-NODE BASTARD-SAGENative
Eriogonum wrightii var. wrightiiWRIGHT'S BASTARD-SAGENative
Erioneuron
Erioneuron pilosumHAIRY ERIONEURONNative
Erioneuron pulchellum
(Under Dasyochloa pulchella)
Synonym
EriophorumCOTTON GRASS
Eriophorum criniger
(Under Calliscirpus criniger)
Orthographic variant
Eriophorum crinigerum
(Under Calliscirpus criniger)
Synonym
Eriophorum gracileSLENDER COTTONGRASSNative
Eriophyllum
  ↳  Key to Eriophyllum
WOOLLY SUNFLOWER
Eriophyllum ambiguumNative
Eriophyllum ambiguum var. ambiguumBEAUTIFUL WOOLLY SUNFLOWERNative
Eriophyllum ambiguum var. paleaceumNative
Eriophyllum aureum
(Under Eriophyllum wallacei)
Synonym
Eriophyllum confertiflorumGOLDEN-YARROW, YELLOW-YARROWNative
Eriophyllum confertiflorum var. confertiflorumNative
Eriophyllum confertiflorum var. latum
(Under Eriophyllum confertiflorum var. confertiflorum)
Synonym
Eriophyllum confertiflorum var. tanacetiflorumTANSY-FLOWERED WOOLLY SUNFLOWERNative
Eriophyllum congdoniiCONGDON'S WOOLLY SUNFLOWERNative
Eriophyllum croceum
(Under Eriophyllum lanatum var. croceum)
Synonym
Eriophyllum heermannii
(Under Pseudobahia heermannii)
Synonym
Eriophyllum idoneum
(Under Eriophyllum lanatum var. achilleoides)
Synonym
Eriophyllum jepsoniiJEPSON'S WOOLLY SUNFLOWERNative
Eriophyllum lanatumCOMMON WOOLLY SUNFLOWERNative
Eriophyllum lanatum var. achillaeoides
(Under Eriophyllum lanatum var. achilleoides)
Orthographic variant
Eriophyllum lanatum var. achilleoidesNative
Eriophyllum lanatum var. arachnoideumNative
Eriophyllum lanatum var. croceumNative
Eriophyllum lanatum var. grandiflorumNative
Eriophyllum lanatum var. halliiFORT TEJON WOOLLY SUNFLOWERNative
Eriophyllum lanatum var. integrifoliumOREGON SUNSHINENative
Eriophyllum lanatum var. lanceolatumNative
Eriophyllum lanatum var. obovatumSOUTHERN SIERRA WOOLLY SUNFLOWERNative
Eriophyllum lanosumNative
Eriophyllum latilobumSAN MATEO WOOLLY SUNFLOWERNative
Eriophyllum mohavenseBARSTOW WOOLLY SUNFLOWERNative
Eriophyllum multicauleMANY-STEM WOOLLY SUNFLOWERNative
Eriophyllum nevinii
(Under Constancea nevinii)
Synonym
Eriophyllum nubigenumYOSEMITE WOOLLY SUNFLOWERNative
Eriophyllum nubigenum var. congdonii
(Under Eriophyllum congdonii)
Synonym
Eriophyllum obovatum
(Under Eriophyllum lanatum var. obovatum)
Synonym
Eriophyllum paleaceum
(Under Eriophyllum ambiguum var. paleaceum)
Synonym
Eriophyllum pringleiPRINGLE'S WOOLLY SUNFLOWERNative
Eriophyllum staechadifoliumSEASIDE WOOLLY SUNFLOWERNative
Eriophyllum staechadifolium var. artemisiifolium
(Under Eriophyllum staechadifolium)
Synonym
Eriophyllum staechadifolium var. depressum
(Under Eriophyllum staechadifolium)
Synonym
Eriophyllum tanacetiflorum
(Under Eriophyllum confertiflorum var. tanacetiflorum)
Synonym
Eriophyllum wallaceiWALLACE'S WOOLLY DAISYNative
Eriophyllum wallacei var. calvescens
(Under Eriophyllum wallacei)
Synonym
Ernstamra macrophylla
(Under Wigandia urens)
Synonym
Ernstamra urens
(Under Wigandia urens)
Synonym
Erocallis triphylla
(Under Lewisia triphylla)
Synonym
Erodium
  ↳  Key to Erodium
STORKSBILL, FILAREE
Erodium botrysNaturalized
Erodium brachycarpumNaturalized
Erodium cicutariumREDSTEM FILAREENaturalized
Erodium cygnorumWaif
Erodium macrophyllum
(Under California macrophylla)
Synonym
Erodium macrophyllum var. californicum
(Under California macrophylla)
Synonym
Erodium malacoidesNaturalized
Erodium moschatumGREENSTEM FILAREENaturalized
Erodium obtusiplicatum
(Under Erodium brachycarpum)
Synonym
Erodium texanumTEXAS FILAREENative
ErucaGARDEN-ROCKET
Eruca sativa
(Under Eruca vesicaria subsp. sativa)
Synonym
Eruca vesicaria subsp. sativaNaturalized
Erucastrum
Erucastrum gallicumWaif
Eryngium
  ↳  Key to Eryngium
Eryngium alismaefolium
(Under Eryngium alismifolium)
Orthographic variant
Eryngium alismifoliumALISMA-LEAVED BUTTON-CELERYNative
Eryngium aristulatumNative
Eryngium aristulatum var. aristulatumNative
Eryngium aristulatum var. aristulatum
(Under Eryngium jepsonii)
Misapplied name, in part
Eryngium aristulatum var. hooveriHOOVER'S BUTTON-CELERYNative
Eryngium aristulatum var. parishiiSAN DIEGO BUTTON-CELERYNative
Eryngium armatumCOASTAL BUTTON-CELERYNative
Eryngium articulatumBEETHISTLENative
Eryngium articulatum var. bakeri
(Under Eryngium articulatum)
Synonym
Eryngium articulatum var. microcephalum
(Under Eryngium alismifolium)
Synonym
Eryngium californicum
(Under Eryngium jepsonii)
Synonym
Eryngium castrenseGREAT VALLEY COYOTE-THISTLENative
Eryngium constanceiLOCH LOMOND BUTTON-CELERYNative
Eryngium elongatum
(Under Eryngium jepsonii)
Synonym
Eryngium globosum
(Under Eryngium spinosepalum)
Illegitimate name
Eryngium globosum var. medium
(Under Eryngium castrense)
Illegitimate name
Eryngium harknessii
(Under Eryngium articulatum)
Synonym
Eryngium harmsianum
(Under Eryngium armatum)
Synonym
Eryngium jepsoniiNative
Eryngium jepsonii var. parishii
(Under Eryngium aristulatum var. parishii)
Synonym
Eryngium longistylum
(Under Eryngium armatum)
Synonym
Eryngium mathiasiaeMATHIAS' BUTTON-CELERYNative
Eryngium minimum
(Under Eryngium alismifolium)
Synonym
Eryngium montereyenseFORT ORD BUTTON-CELERYNative
Eryngium parishii
(Under Eryngium aristulatum var. parishii)
Synonym
Eryngium pendletonensePENDLETON BUTTON-CELERYNative
Eryngium petiolatum var. armatum
(Under Eryngium armatum)
Synonym
Eryngium petiolatum var. minimum
(Under Eryngium alismifolium)
Synonym
Eryngium pinnatisectumTUOLUMNE BUTTON-CELERYNative
Eryngium racemosumDELTA BUTTON-CELERYNative
Eryngium spinosepalumSPINY-SEPALED BUTTON-CELERYNative
Eryngium spinosepalum var. medium
(Under Eryngium castrense)
Synonym
Eryngium vaseyiCOYOTE-THISTLENative
Eryngium vaseyi var. castrense
(Under Eryngium castrense)
Synonym
Eryngium vaseyi var. globosum
(Under Eryngium spinosepalum)
Synonym
Eryngium vaseyi var. vallicolaNative
Eryngium vaseyi var. vaseyiNative
Erysimum
  ↳  Key to Erysimum
WALLFLOWER
Erysimum ammophilumSAND-LOVING WALLFLOWERNative
Erysimum amoenum
(Under Erysimum capitatum var. purshii)
Synonym
Erysimum argillosum
(Under Erysimum capitatum var. purshii)
Synonym
Erysimum asperum var. bealianum
(Under Erysimum capitatum var. capitatum)
Synonym
Erysimum asperum var. purshii
(Under Erysimum capitatum var. purshii)
Synonym
Erysimum asperum var. stellatum
(Under Erysimum capitatum var. capitatum)
Synonym
Erysimum capitatumWESTERN WALLFLOWERNative
Erysimum capitatum subsp. angustatum
(Under Erysimum capitatum var. capitatum)
Synonym ined.
Erysimum capitatum subsp. capitatum
(Under Erysimum capitatum var. capitatum)
Synonym ined.
Erysimum capitatum subsp. lompocense
(Under Erysimum capitatum var. capitatum)
Synonym ined.
Erysimum capitatum subsp. perenne
(Under Erysimum perenne)
Synonym ined.
Erysimum capitatum var. angustatum
(Under Erysimum capitatum var. capitatum)
Synonym
Erysimum capitatum var. bealianum
(Under Erysimum capitatum var. capitatum)
Synonym
Erysimum capitatum var. capitatumNative
Erysimum capitatum var. lompocense
(Under Erysimum capitatum var. capitatum)
Synonym
Erysimum capitatum var. perenne
(Under Erysimum perenne)
Synonym
Erysimum capitatum var. purshiiNative
Erysimum cheiranthoidesWORMSEED MUSTARDNaturalized
Erysimum cheiriNaturalized
Erysimum concinnumNative
Erysimum concinnum subsp. suffrutescens
(Under Erysimum suffrutescens)
Synonym
Erysimum franciscanumSAN FRANCISCO WALLFLOWERNative
Erysimum franciscanum var. crassifolium
(Under Erysimum franciscanum)
Synonym
Erysimum franciscanum var. franciscanum
(Under Erysimum franciscanum)
Synonym
Erysimum insulareISLAND WALLFLOWERNative
Erysimum insulare subsp. suffrutescens
(Under Erysimum suffrutescens)
Synonym ined.
Erysimum insulare var. angustatum
(Under Erysimum capitatum var. capitatum)
Synonym
Erysimum menziesiiMENZIES' WALLFLOWERNative
Erysimum menziesii subsp. concinnum
(Under Erysimum concinnum)
Synonym ined.
Erysimum menziesii subsp. eurekense
(Under Erysimum menziesii)
Synonym ined.
Erysimum menziesii subsp. yadonii
(Under Erysimum menziesii)
Synonym ined.
Erysimum moniliforme
(Under Erysimum capitatum var. capitatum)
Synonym
Erysimum perenneNative
Erysimum repandumNaturalized
Erysimum suffrutescensSUFFRUTESCENT WALLFLOWERNative
Erysimum suffrutescens var. grandifolium
(Under Erysimum suffrutescens)
Synonym
Erysimum suffrutescens var. lompocense
(Under Erysimum capitatum var. capitatum)
Synonym
Erysimum teretifoliumSANTA CRUZ WALLFLOWERNative
Erythranthe
  ↳  Key to Erythranthe
MONKEYFLOWER
Erythranthe acutidensKINGS RIVER MONKEYFLOWERNative
Erythranthe alsinoidesCHICKWEED MONKEYFLOWERNative
Erythranthe androsaceaROCK-JASMINE MONKEYFLOWERNative
Erythranthe arenariaSAND-LOVING MONKEYFLOWERNative
Erythranthe arenicolaBEACH MONKEYFLOWERNative
Erythranthe arvensisVILLOUS-BRACTED MONKEYFLOWERNative
Erythranthe barbataBEARDED MONKEYFLOWERNative
Erythranthe bicolorYELLOW AND WHITE MONKEYFLOWERNative
Erythranthe brevifloraSHORT-FLOWER MONKEYFLOWERNative
Erythranthe breweriBREWER'S MONKEYFLOWERNative
Erythranthe calcicolaLIMESTONE MONKEYFLOWERNative
Erythranthe cardinalisSCARLET MONKEYFLOWERNative
Erythranthe carsonensisCARSON VALLEY MONKEYFLOWERNative
Erythranthe corallinaCORALLINE MONKEYFLOWERNative
Erythranthe cordataNative
Erythranthe dentataTOOTH-LEAVED MONKEYFLOWERNative
Erythranthe diffusaPALOMAR MONKEYFLOWERNative
Erythranthe discolorTWO-COLORED MONKEYFLOWERNative
Erythranthe erubescensCALIFORNIA BLUSHING MONKEYFLOWERNative
Erythranthe exiguaSAN BERNARDINO MOUNTAINS MONKEYFLOWER, EYE STRAIN MONKEYFLOWERNative
Erythranthe filicaulisSLENDER-STEMMED MONKEYFLOWERNative
Erythranthe filicifoliaFERNLEAF MONKEYFLOWERNative
Erythranthe floribundaMANY-FLOWERED MONKEYFLOWERNative
Erythranthe geniculataBENT-STEM MONKEYFLOWERNative
Erythranthe glaucescensSHIELD-BRACTED MONKEYFLOWERNative
Erythranthe gracilipesSLENDER-STALKED MONKEYFLOWERNative
Erythranthe grandisMAGNIFICENT SEEP MONKEYFLOWERNative
Erythranthe guttataCOMMON MONKEYFLOWER, SEEP MONKEYFLOWERNative
Erythranthe hardhamiaeHARDHAM'S MONKEYFLOWERNative
Erythranthe inconspicuaSMALL-FLOWERED MONKEYFLOWERNative
Erythranthe inflatulaEPHEMERAL MONKEYFLOWER, DISAPPEARING MONKEYFLOWERNative
Erythranthe inodora
(Under Erythranthe moschata)
Synonym
Erythranthe laciniataCUT-LEAVED MONKEYFLOWERNative
Erythranthe latidensBROAD-TOOTH MONKEYFLOWERNative
Erythranthe lewisiiGREAT PURPLE MONKEYFLOWER, LEWIS'S MONKEYFLOWERNative
Erythranthe linearifoliaTHREADLEAF PRIMROSE MONKEYFLOWERNative
Erythranthe marmorataSTANISLAUS MONKEYFLOWERNative
Erythranthe microphyllaNative
Erythranthe moniliformis
(Under Erythranthe moschata)
Synonym
Erythranthe montioidesMONTIA-LIKE MONKEYFLOWERNative
Erythranthe moschataMUSK MONKEYFLOWERNative
Erythranthe nasutaNative
Erythranthe norrisiiKAWEAH MONKEYFLOWERNative
Erythranthe nudataBARE MONKEYFLOWERNative
Erythranthe palmeriPALMER'S MONKEYFLOWERNative
Erythranthe pardalisPENNELL'S PANTHERNative
Erythranthe parishiiPARISH'S MONKEYFLOWERNative
Erythranthe percaulisSERPENTINE CANYON MONKEYFLOWERNative
Erythranthe primuloidesNative
Erythranthe ptilotaWING-LEAF MONKEYFLOWERNative
Erythranthe pulsiferaeCANDELABRUM MONKEYFLOWERNative
Erythranthe purpureaLITTLE PURPLE MONKEYFLOWERNative
Erythranthe rhodopetraRED ROCK CANYON MONKEYFLOWERNative
Erythranthe rubellaREDSTEM MONKEYFLOWERNative
Erythranthe shevockiiKELSO CREEK MONKEYFLOWERNative
Erythranthe sierraeSIERRA NEVADA MONKEYFLOWERNative
Erythranthe suksdorfiiSUKDORF'S MONKEYFLOWERNative
Erythranthe tayloriiSHASTA LIMESTONE MONKEYFLOWERNative
Erythranthe tilingiiTILING'S MONKEYFLOWERNative
Erythranthe trinitiensisPINK MARGINED MONKEYFLOWERNative
Erythranthe utahensisUTAH MONKEYFLOWERNative
Erythronium
  ↳  Key to Erythronium
FAWN LILY
Erythronium californicumNative
Erythronium citrinumNative
Erythronium citrinum var. citrinumLEMON-COLORED FAWN LILYNative
Erythronium citrinum var. roderickiiSCOTT MOUNTAINS FAWN LILYNative
Erythronium grandiflorum subsp. chrysandrum
(Under Erythronium grandiflorum subsp. grandiflorum)
Synonym
Erythronium grandiflorum subsp. grandiflorumGLACIER LILYNative
Erythronium grandiflorum subsp. pusaterii
(Under Erythronium pusaterii)
Synonym
Erythronium grandiflorum var. grandiflorum
(Under Erythronium grandiflorum subsp. grandiflorum)
Synonym
Erythronium grandiflorum var. pallidum
(Under Erythronium grandiflorum subsp. grandiflorum)
Synonym
Erythronium helenaeST. HELENA FAWN LILYNative
Erythronium hendersoniiHENDERSON'S FAWN LILYNative
Erythronium howellii
(Under Erythronium citrinum var. citrinum)
Synonym
Erythronium klamathenseKLAMATH FAWN LILYNative
Erythronium multiscapideumNative
Erythronium multiscapoideum
(Under Erythronium multiscapideum)
Orthographic variant
Erythronium oregonumGIANT FAWN LILYNative
Erythronium oregonum subsp. leucandrum
(Under Erythronium oregonum)
Synonym
Erythronium pluriflorumSHUTEYE PEAK FAWN LILYNative
Erythronium purpurascensNative
Erythronium pusateriiKAWEAH FAWN LILYNative
Erythronium revolutumCOAST FAWN LILYNative
Erythronium shastenseSHASTA FAWN LILYNative
Erythronium tayloriiPILOT RIDGE FAWN LILYNative
Erythronium tuolumnenseTUOLUMNE FAWN LILYNative
Eschscholzia
  ↳  Key to Eschscholzia
Eschscholzia androuxiiJOSHUA TREE POPPYNative
Eschscholzia caespitosaFOOTHILL POPPYNative
Eschscholzia caespitosa subsp. kernensis
(Under Eschscholzia lemmonii subsp. kernensis)
Synonym
Eschscholzia californicaCALIFORNIA POPPYNative
Eschscholzia californica subsp. mexicana
(Under Eschscholzia mexicana)
Synonym
Eschscholzia californica var. peninsularis
(Under Eschscholzia californica)
Synonym
Eschscholzia glyptospermaDESERT GOLD POPPYNative
Eschscholzia hypecoidesSAN BENITO POPPYNative
Eschscholzia lemmoniiNative
Eschscholzia lemmonii subsp. kernensisTEJON POPPYNative
Eschscholzia lemmonii subsp. lemmoniiNative
Eschscholzia lobbiiFRYING PANSNative
Eschscholzia mexicanaDESERT CALIFORNIA POPPYNative
Eschscholzia minutifloraNative
Eschscholzia minutiflora subsp. covilleiCOVILLE'S POPPYNative
Eschscholzia minutiflora subsp. minutifloraPYGMY POPPYNative
Eschscholzia minutiflora subsp. twisselmanniiRED ROCK POPPYNative
Eschscholzia papastilliiMOJAVE POPPYNative
Eschscholzia parishiiPARISH'S POPPY; GOLD POPPYNative
Eschscholzia ramosaISLAND POPPYNative
Eschscholzia rhombipetalaDIAMOND-PETALED CALIFORNIA POPPYNative
Escobaria
  ↳  Key to Escobaria
BEEHIVE CACTUS
Escobaria alversoniiFOXTAIL CACTUSNative
Escobaria chloranthaDESERT PINCUSHIONNative
Escobaria deserti
(Under Escobaria chlorantha)
Synonym
Escobaria vivipara var. alversonii
(Under Escobaria alversonii)
Synonym
Escobaria vivipara var. deserti
(Under Escobaria chlorantha)
Synonym
Escobaria vivipara var. roseaVIVIPAROUS FOXTAIL CACTUSNative
Eucalyptus
  ↳  Key to Eucalyptus
EUCALYPTUS, GUM TREE
Eucalyptus camaldulensisRED GUM, RIVER RED GUMNaturalized
Eucalyptus citriodoraLEMON-SCENTED GUMNaturalized
Eucalyptus cladocalyxSUGAR GUMNaturalized
Eucalyptus conferruminataSPIDER GUM, BUSHY YATENaturalized
Eucalyptus corynocalyx
(Under Eucalyptus cladocalyx)
Synonym
Eucalyptus globulusBLUE GUMNaturalized
Eucalyptus maculata var. citriodora
(Under Eucalyptus citriodora)
Synonym
Eucalyptus polyanthemosSILVER DOLLAR GUM, RED BOXNaturalized
Eucalyptus pulchellaWHITE PEPPERMINTNaturalized
Eucalyptus sideroxylonRED IRON BARKNaturalized
Eucalyptus tereticornisFOREST RED GUMNaturalized
Eucalyptus viminalisMANNA GUM, RIBBON GUMNaturalized
Eucephalus breweri
(Under Doellingeria breweri)
Synonym
Eucephalus brickellioides
(Under Doellingeria tomentella)
Synonym
Eucephalus engelmannii
(Under Doellingeria engelmannii)
Synonym
Eucephalus glabratus
(Under Doellingeria glabrata)
Synonym
Eucephalus glandulosus
(Under Doellingeria glabrata)
Synonym
Eucephalus ledophyllus var. covillei
(Under Doellingeria ledophylla var. covillei)
Synonym
Eucephalus tomentellus
(Under Doellingeria tomentella)
Synonym
Eucharidium breweri
(Under Clarkia breweri)
Synonym
Euchiton
  ↳  Key to Euchiton
COTTONLEAF, CUDWEED
Euchiton gymnocephalusCREEPING CUDWEEDNaturalized
Euchiton involucratusSTAR COTTONLEAFNaturalized
Euchiton sphaericusGLOBE COTTONLEAFNaturalized
Euclidium
Euclidium syriacumNaturalized
Eucnide
  ↳  Key to Eucnide
ROCK-NETTLE
Eucnide rupestrisANNUAL ROCK-NETTLENative
Eucnide urensNative
Eucrypta
  ↳  Key to Eucrypta
Eucrypta chrysanthemifoliaNative
Eucrypta chrysanthemifolia var. bipinnatifidaNative
Eucrypta chrysanthemifolia var. chrysanthemifoliaNative
Eucrypta foliosa
(Under Eucrypta chrysanthemifolia var. chrysanthemifolia)
Synonym
Eucrypta micranthaNative
Eucrypta paniculata
(Under Eucrypta chrysanthemifolia var. chrysanthemifolia)
Synonym
Eucrypta pinetorum
(Under Eucrypta micrantha)
Synonym
Eucrypta torreyi
(Under Eucrypta chrysanthemifolia var. bipinnatifida)
Synonym
Eucycla ovalifolia
(Under Eriogonum ovalifolium var. ovalifolium)
Synonym
Eucycla purpurea
(Under Eriogonum ovalifolium var. purpureum)
Synonym
Eugenia apiculata
(Under Luma apiculata)
Synonym
Eugenia australis
(Under Syzygium australe)
Synonym
Eulobus
Eulobus californicusNative
Eunanus angustifolius
(Under Diplacus mephiticus)
Synonym
Eunanus bicolor
(Under Diplacus bicolor)
Synonym
Eunanus breweri
(Under Erythranthe breweri)
Synonym
Eunanus layneae
(Under Diplacus layneae)
Synonym
Eunanus nanus
(Under Diplacus nanus)
Synonym
Eunanus pictus
(Under Diplacus pictus)
Synonym
Eunanus pulchellus
(Under Diplacus pulchellus)
Synonym
Eunanus tolmiei
(Under Diplacus nanus)
Synonym
EuonymusBURNING BUSH
Euonymus occidentalis
  ↳  Key to Euonymus occidentalis
WESTERN BURNING BUSHNative
Euonymus occidentalis var. occidentalisNative
Euonymus occidentalis var. parishiiNative
Eupatorium adenophorum
(Under Ageratina adenophora)
Synonym
Eupatorium grandiflorum
(Under Brickellia grandiflora)
Synonym
Eupatorium herbaceum
(Under Ageratina herbacea)
Synonym
Eupatorium occidentale
(Under Ageratina occidentalis)
Synonym
Eupatorium shastense
(Under Ageratina shastensis)
Synonym
Euphorbia
  ↳  Key to Euphorbia
SPURGE
Euphorbia abramsianaABRAMS' SPURGENative
Euphorbia albomarginataRATTLESNAKE SANDMATNative
Euphorbia arenicola
(Under Euphorbia ocellata subsp. arenicola)
Synonym
Euphorbia arizonicaARIZONA SPURGENative
Euphorbia crenulataCHINESE CAPSNative
Euphorbia cyathophoraPAINTED LEAFWaif
Euphorbia davidiiDAVID'S POINSETTIAWaif
Euphorbia dendroidesTREE SPURGENaturalized
Euphorbia dentataTOOTHED POINSETTIAWaif
Euphorbia dentata var. dentata
(Under Euphorbia dentata)
Synonym
Euphorbia erianthaBEETLE SPURGENative
Euphorbia exstipulata var. exstipulataCLARK MOUNTAIN SPURGENative
Euphorbia fendleriFENDLER'S SANDMATNative
Euphorbia glyptospermaRIDGE-SEEDED SPURGENative
Euphorbia helioscopiaWARTWEEDNaturalized
Euphorbia hooveriHOOVER'S SPURGENative
Euphorbia incisa
(Under Euphorbia schizoloba)
Synonym
Euphorbia incisa var. incisa
(Under Euphorbia schizoloba)
Synonym
Euphorbia jaegeriOROCOPIA MOUNTAINS SPURGENative
Euphorbia lathyrisCAPER SPURGENaturalized
Euphorbia luridaWOODLAND SPURGENative
Euphorbia maculataSPOTTED SPURGENaturalized
Euphorbia melanadeniaRED-GLAND SPURGENative
Euphorbia micromeraSONORAN SANDMATNative
Euphorbia miseraCLIFF SPURGENative
Euphorbia myrsinitesMYRTLE SPURGEWaif
Euphorbia nutansEYEBANE SPURGENaturalized
Euphorbia oblongataEGGLEAF SPURGENaturalized
Euphorbia ocellataNative
Euphorbia ocellata subsp. arenicolaDUNE SPURGENative
Euphorbia ocellata subsp. ocellataVALLEY SPURGENative
Euphorbia ocellata subsp. rattaniiSTONY CREEK SPURGENative
Euphorbia ocellata var. rattanii
(Under Euphorbia ocellata subsp. rattanii)
Synonym
Euphorbia palmeri
(Under Euphorbia lurida)
Synonym
Euphorbia parishiiPARISH'S SANDMATNative
Euphorbia parryiPARRY'S SPURGENative
Euphorbia pediculiferaCARRIZO MOUNTAIN SANDMATNative
Euphorbia peplusPETTY SPURGENaturalized
Euphorbia platyspermaFLAT-SEEDED SPURGENative
Euphorbia polycarpaSMALLSEED SANDMATNative
Euphorbia prostrataPROSTRATE SANDMATNaturalized
Euphorbia rattanii
(Under Euphorbia ocellata subsp. rattanii)
Synonym
Euphorbia revolutaREVOLUTE SPURGENative
Euphorbia rigidaGOPHER SPURGEWaif
Euphorbia schizolobaMOJAVE SPURGENative
Euphorbia serpensMATTED SANDMATNaturalized
Euphorbia serpillifoliaTHYME-LEAFED SPURGENative
Euphorbia serpillifolia subsp. hirtulaNative
Euphorbia serpillifolia subsp. serpillifoliaNative
Euphorbia setilobaYUMA SANDMATNative
Euphorbia spathulataWARTY SPURGENative
Euphorbia supina
(Under Euphorbia maculata)
Synonym
Euphorbia terracinaGERALDTON CARNATION WEEDNaturalized
Euphorbia vallis-mortaeDEATH VALLEY SANDMATNative
Euphorbia virgataLEAFY SPURGENaturalized
Euphorbiaceae
  ↳  Key to Euphorbiaceae
SPURGE FAMILY
Euphrosyne
  ↳  Key to Euphrosyne
Euphrosyne acerosaCOPPERWORTNative
Euphrosyne nevadensisNEVADA WORMWOODNative
Euploca convolvulacea subsp. californica
(Under Heliotropium convolvulaceum var. californicum)
Synonym
Eurotia lanata
(Under Krascheninnikovia lanata)
Synonym
Eurybia
  ↳  Key to Eurybia
ASTER
Eurybia integrifoliaNative
Eurybia meritaSUBALPINE ASTERNative
Eurybia radulinaNative
EustomaCATCHFLY GENTIAN
Eustoma exaltatum subsp. exaltatumNative
EuthamiaGRASS-LEAVED GOLDENROD
Euthamia occidentalisWESTERN GOLDENRODNative
Eutoca albiflora
(Under Phacelia viscida var. albiflora)
Synonym
Eutoca brachyloba
(Under Phacelia brachyloba)
Synonym
Eutoca congesta
(Under Phacelia linearis)
Synonym
Eutoca douglasii
(Under Phacelia douglasii)
Synonym
Eutoca glomerata
(Under Phacelia linearis)
Synonym
Eutoca grandiflora
(Under Phacelia grandiflora)
Synonym
Eutoca heterophylla
(Under Phacelia linearis)
Synonym
Eutoca loasifolia
(Under Phacelia malvifolia var. loasifolia)
Synonym
Eutoca menziesii
(Under Phacelia linearis)
Synonym
Eutoca menziesii var. congesta
(Under Phacelia linearis)
Synonym
Eutoca menziesii var. multiflora
(Under Phacelia linearis)
Synonym
Eutoca multiflora
(Under Phacelia linearis)
Synonym
Eutoca phacelioides
(Under Phacelia phacelioides)
Synonym
Eutoca speciosa
(Under Phacelia grandiflora)
Synonym
Evax caulescens
(Under Hesperevax caulescens)
Synonym
Extriplex
  ↳  Key to Extriplex
Extriplex californicaCALIFORNIA ORACHNative
Extriplex joaquinanaSAN JOAQUIN SPEARSCALENative
Fabaceae (Leguminosae)
  ↳  Key to Fabaceae (Leguminosae)
LEGUME FAMILY
Fagaceae
  ↳  Key to Fagaceae
OAK FAMILY
Fagonia
  ↳  Key to Fagonia
Fagonia californica subsp. laevis
(Under Fagonia laevis)
Synonym
Fagonia californica subsp. pachyacantha
(Under Fagonia pachyacantha)
Synonym
Fagonia laevisNative
Fagonia pachyacanthaNative
Fallopia
  ↳  Key to Fallopia
Fallopia aubertii
(Under Fallopia baldschuanica)
Synonym
Fallopia baldschuanicaBUKHARA FLEECEFLOWERNaturalized
Fallopia convolvulusBLACK BINDWEEDNaturalized
Fallopia japonicaJAPANESE KNOTWEEDNaturalized
Fallopia sachalinensisGIANT KNOTWEEDNaturalized
FallugiaAPACHE PLUME
Fallugia paradoxaNative
Fendlerella
Fendlerella utahensisYERBA DESIERTONative
Ferocactus
  ↳  Key to Ferocactus
BARREL CACTUS
Ferocactus acanthodes
(Under Ferocactus cylindraceus)
Misapplied name
Ferocactus cylindraceusCALIFORNIA BARREL CACTUSNative
Ferocactus cylindraceus var. cylindraceus
(Under Ferocactus cylindraceus)
Synonym
Ferocactus cylindraceus var. lecontei
(Under Ferocactus cylindraceus)
Synonym
Ferocactus viridescensSAN DIEGO BARREL CACTUSNative
Ferocactus viridescens var. viridescens
(Under Ferocactus viridescens)
Synonym
Festuca
  ↳  Key to Festuca
FESCUE, RYE GRASS
Festuca arida
(Under Festuca microstachys)
Synonym
Festuca arundinaceaTALL FESCUENaturalized
Festuca brachyphylla subsp. breviculmisALPINE FESCUENative
Festuca bromoidesBROME FESCUENaturalized
Festuca californicaCALIFORNIA FESCUENative
Festuca confusa
(Under Festuca microstachys)
Synonym
Festuca dertonensis
(Under Festuca bromoides)
Synonym
Festuca eastwoodiae
(Under Festuca microstachys)
Synonym
Festuca elatior
(Under Festuca arundinacea)
Synonym
Festuca elatior var. pratensis
(Under Festuca pratensis)
Synonym
Festuca elmeriNative
Festuca elmeri subsp. luxurians
(Under Festuca elmeri)
Synonym
Festuca grayi
(Under Festuca microstachys)
Synonym
Festuca howellii
(Under Festuca elmeri)
Synonym
Festuca idahoensisIDAHO FESCUE, BLUE BUNCHGRASSNative
Festuca idahoensis subsp. roemeri
(Under Festuca idahoensis)
Synonym
Festuca kingiiNative
Festuca megalura
(Under Festuca myuros)
Synonym
Festuca microstachysNative
Festuca microstachys var. ciliata
(Under Festuca microstachys)
Synonym
Festuca microstachys var. pauciflora
(Under Festuca microstachys)
Synonym
Festuca microstachys var. simulans
(Under Festuca microstachys)
Synonym
Festuca minutifloraSMALL-FLOWERED FESCUENative
Festuca myurosRATTAIL SIXWEEKS GRASSNaturalized
Festuca occidentalisWESTERN FESCUENative
Festuca octofloraSIXWEEKS GRASSNative
Festuca octoflora subsp. hirtella
(Under Festuca octoflora)
Synonym
Festuca pacifica
(Under Festuca microstachys)
Synonym
Festuca perennisRYE GRASSNaturalized
Festuca pratensisMEADOW FESCUENaturalized
Festuca reflexa
(Under Festuca microstachys)
Synonym
Festuca roemeri
(Under Festuca idahoensis)
Synonym
Festuca roemeri var. klamathensis
(Under Festuca idahoensis)
Synonym
Festuca rubraRED FESCUENative
Festuca saximontanaMOUNTAIN FESCUENative
Festuca saximontana var. purpusiana
(Under Festuca saximontana)
Synonym
Festuca saximontana var. saximontana
(Under Festuca saximontana)
Synonym
Festuca subulataBEARDED FESCUENative
Festuca subulifloraCRINKLE-AWN FESCUENative
Festuca temulentaDARNEL, TARESNaturalized
Festuca trachyphyllaHARD or SHEEP FESCUENaturalized
Festuca tracyi
(Under Festuca microstachys)
Synonym
Festuca viridulaMOUNTAIN BUNCH GRASS, GREEN FESCUENative
FicusFIG
Ficus caricaEDIBLE FIGNaturalized
Filago
Filago arizonica
(Under Logfia arizonica)
Synonym
Filago californica
(Under Logfia filaginoides)
Synonym
Filago depressa
(Under Logfia depressa)
Synonym
Filago gallica
(Under Logfia gallica)
Synonym
Filago germanica
(Under Filago pyramidata var. pyramidata)
Synonym
Filago germanica
(Under Filago pyramidata var. pyramidata)
Illegitimate name
Filago pyramidata var. pyramidataBROADLEAF COTTONROSENaturalized
Fimbristylis
  ↳  Key to Fimbristylis
Fimbristylis autumnalisNaturalized
Fimbristylis capillaris
(Under Bulbostylis capillaris)
Synonym
Fimbristylis thermalisHOT SPRINGS FIMBRISTYLISNative
Fimbristylis vahliiNative
Flaveria
Flaveria trinerviaNaturalized
FloerkeaFALSE MERMAID
Floerkea proserpinacoidesNative
Foeniculum
Foeniculum vulgareFENNELNaturalized
Forestiera
Forestiera neomexicana var. arizonica
(Under Forestiera pubescens)
Synonym
Forestiera neomexicana var. neomexicana
(Under Forestiera pubescens)
Synonym
Forestiera pubescensDESERT OLIVENative
Forestiera pubescens var. parviflora
(Under Forestiera pubescens)
Synonym
Forsellesia arida
(Under Glossopetalon spinescens var. aridum)
Synonym
Forsellesia nevadensis
(Under Glossopetalon spinescens var. aridum)
Synonym
Forsellesia pungens
(Under Glossopetalon pungens)
Synonym
Forsellesia pungens var. glabra
(Under Glossopetalon pungens)
Synonym
Forsellesia stipulifera
(Under Glossopetalon spinescens var. aridum)
Synonym
Fouquieria
Fouquieria splendens subsp. splendensOCOTILLONative
FouquieriaceaeOCOTILLO FAMILY
Fragaria
  ↳  Key to Fragaria
STRAWBERRY
Fragaria chiloensisBEACH STRAWBERRYNative
Fragaria chiloensis subsp. lucida
(Under Fragaria chiloensis)
Synonym
Fragaria chiloensis subsp. pacifica
(Under Fragaria chiloensis)
Synonym
Fragaria crinita
(Under Fragaria vesca)
Synonym
Fragaria vescaWOOD STRAWBERRYNative
Fragaria vesca subsp. bracteata
(Under Fragaria vesca)
Synonym
Fragaria vesca subsp. californica
(Under Fragaria vesca)
Synonym
Fragaria virginianaMOUNTAIN STRAWBERRYNative
Fragaria virginiana subsp. platypetala
(Under Fragaria virginiana)
Synonym
Frangula
  ↳  Key to Frangula
COFFEE BERRY
Frangula californicaCALIFORNIA COFFEE BERRYNative
Frangula californica subsp. californicaNative
Frangula californica subsp. crassifoliaNative
Frangula californica subsp. cuspidataNative
Frangula californica subsp. occidentalisNative
Frangula californica subsp. tomentellaNative
Frangula californica subsp. ursinaNative
Frangula purshianaCASCARANative
Frangula purshiana subsp. annonifoliaNative
Frangula purshiana subsp. purshianaNative
Frangula purshiana subsp. ultramaficaCARIBOU COFFEE BERRYNative
Frangula rubraSIERRA COFFEE BERRYNative
Frangula rubra subsp. modocensisNative
Frangula rubra subsp. obtusissimaNative
Frangula rubra subsp. rubraNative
Frangula rubra subsp. yosemitanaNative
Frankenia
  ↳  Key to Frankenia
FRANKENIA
Frankenia grandifolia
(Under Frankenia salina)
Synonym
Frankenia grandifolia var. campestris
(Under Frankenia salina)
Synonym
Frankenia palmeriPALMER'S FRANKENIANative
Frankenia pulverulentaEUROPEAN SEA HEATHWaif
Frankenia salinaALKALI HEATHNative
FrankeniaceaeFRANKENIA FAMILY
Franseria acanthicarpa
(Under Ambrosia acanthicarpa)
Synonym
Franseria ambrosioides
(Under Ambrosia ambrosioides)
Synonym
Franseria chamissonis
(Under Ambrosia chamissonis)
Synonym
Franseria chamissonis subsp. bipinnatisecta
(Under Ambrosia chamissonis)
Synonym
Franseria chenopodiifolia
(Under Ambrosia chenopodiifolia)
Synonym
Franseria confertiflora
(Under Ambrosia confertiflora)
Synonym
Franseria dumosa
(Under Ambrosia dumosa)
Synonym
Franseria ilicifolia
(Under Ambrosia ilicifolia)
Synonym
Frasera
  ↳  Key to Frasera
Frasera albicaulisNative
Frasera albicaulis var. modocensisNative
Frasera albicaulis var. nitidaNative
Frasera albomarginataNative
Frasera albomarginata var. albomarginataDESERT GREEN-GENTIANNative
Frasera albomarginata var. indutaCLARK MOUNTAIN GREEN-GENTIANNative
Frasera neglectaPINE GREEN-GENTIANNative
Frasera parryiNative
Frasera puberulentaNative
Frasera speciosaMONUMENT PLANTNative
Frasera tubulosaNative
Frasera umpquaensisUMPQUA GREEN-GENTIANNative
Fraxinus
  ↳  Key to Fraxinus
ASH
Fraxinus anomalaSINGLE-LEAF ASHNative
Fraxinus anomala var. triphylla
(Under Fraxinus anomala)
Synonym
Fraxinus dipetalaCALIFORNIA ASHNative
Fraxinus dipetala var. trifoliolata
(Under Fraxinus parryi)
Synonym
Fraxinus latifoliaOREGON ASHNative
Fraxinus oregona
(Under Fraxinus latifolia)
Synonym
Fraxinus parryiCHAPARRAL ASHNative
Fraxinus pennsylvanica subsp. oregona
(Under Fraxinus latifolia)
Synonym
Fraxinus pennsylvanica subsp. velutina
(Under Fraxinus velutina)
Synonym
Fraxinus trifoliolata
(Under Fraxinus parryi)
Illegitimate name
Fraxinus velutinaVELVET ASHNative
Fraxinus velutina var. coriacea
(Under Fraxinus velutina)
Synonym
Freesia
Freesia alba
(Under Freesia leichtlinii subsp. alba)
Synonym
Freesia leichtlinii subsp. albaWaif
Fremontia vermiculata
(Under Sarcobatus vermiculatus)
Synonym
Fremontodendron
  ↳  Key to Fremontodendron
FREMONTIA, FLANNELBUSH
Fremontodendron californicumNative
Fremontodendron californicum subsp. californicum
(Under Fremontodendron californicum)
Synonym
Fremontodendron californicum subsp. crassifolium
(Under Fremontodendron californicum)
Synonym
Fremontodendron californicum subsp. decumbens
(Under Fremontodendron decumbens)
Synonym
Fremontodendron californicum subsp. napense
(Under Fremontodendron californicum)
Synonym
Fremontodendron californicum subsp. obispoense
(Under Fremontodendron californicum)
Synonym
Fremontodendron decumbensPINE HILL FLANNELBUSHNative
Fremontodendron mexicanumMEXICAN FLANNELBUSHNative
Fritillaria
  ↳  Key to Fritillaria
FRITILLARY
Fritillaria affinisCHECKER LILYNative
Fritillaria affinis var. affinis
(Under Fritillaria affinis)
Synonym
Fritillaria affinis var. tristulis
(Under Fritillaria affinis)
Synonym ined.
Fritillaria agrestisSTINKBELLSNative
Fritillaria atropurpureaNative
Fritillaria atropurpurea var. gracillima
(Under Fritillaria atropurpurea)
Synonym
Fritillaria bifloraCHOCOLATE LILYNative
Fritillaria biflora var. agrestis
(Under Fritillaria agrestis)
Synonym
Fritillaria biflora var. bifloraNative
Fritillaria biflora var. inezianaHILLSBOROUGH CHOCOLATE LILYNative
Fritillaria brandegeeiGREENHORN FRITILLARYNative
Fritillaria brandegei
(Under Fritillaria brandegeei)
Orthographic variant
Fritillaria eastwoodiaeBUTTE COUNTY FRITILLARYNative
Fritillaria falcataTALUS FRITILLARYNative
Fritillaria gentneriGENTNER'S FRITILLARYNative
Fritillaria glaucaSISKIYOU FRITILLARIANative
Fritillaria gracillima
(Under Fritillaria atropurpurea)
Synonym
Fritillaria lanceolata
(Under Fritillaria affinis)
Illegitimate name
Fritillaria lanceolata var. tristulis
(Under Fritillaria affinis)
Illegitimate name
Fritillaria liliaceaFRAGRANT FRITILLARYNative
Fritillaria micranthaBROWN BELLSNative
Fritillaria ojaiensisOJAI FRITILLARYNative
Fritillaria phaeanthera
(Under Fritillaria affinis)
Synonym
Fritillaria phaeanthera
(Under Fritillaria eastwoodiae)
Illegitimate name
Fritillaria pinetorumPINE FRITILLARYNative
Fritillaria plurifloraADOBE-LILYNative
Fritillaria pudicaYELLOW FRITILLARYNative
Fritillaria purdyiPURDY'S FRITILLARYNative
Fritillaria recurvaSCARLET FRITILLARYNative
Fritillaria recurva var. coccinea
(Under Fritillaria recurva)
Synonym
Fritillaria roderickii
(Under Fritillaria biflora var. biflora)
Synonym
Fritillaria striataSTRIPED ADOBE-LILYNative
Fritillaria virideaSAN BENITO FRITILLARYNative
Fumaria
  ↳  Key to Fumaria
Fumaria capreolataWHITE RAMPING FUMITORYNaturalized
Fumaria officinalisFUMITORYNaturalized
Fumaria parvifloraNaturalized
Funastrum
  ↳  Key to Funastrum
Funastrum crispumWAVYLEAF TWINEVINENative
Funastrum cynanchoides subsp. heterophyllum
(Under Funastrum cynanchoides var. hartwegii)
Synonym
Funastrum cynanchoides var. hartwegiiCLIMBING MILKWEEDNative
Funastrum hirtellumTRAILING TOWNULANative
Funastrum utahenseUTAH VINE MILKWEEDNative
Gaillardia
  ↳  Key to Gaillardia
FIRE WHEEL, BLANKET FLOWER
Gaillardia amara
(Under Helenium amarum var. amarum)
Synonym
Gaillardia aristataWaif
Gaillardia pulchellaWaif
Galeobdolon luteum
(Under Lamiastrum galeobdolon)
Synonym
Galeopsis galeobdolon
(Under Lamiastrum galeobdolon)
Synonym
Galinsoga
Galinsoga parviflora var. parvifloraNaturalized
Galium
  ↳  Key to Galium
BEDSTRAW
Galium ambiguumYOLLA BOLLY BEDSTRAWNative
Galium ambiguum subsp. ambiguumNative
Galium ambiguum subsp. siskiyouenseNative
Galium ambiguum var. ambiguum
(Under Galium ambiguum subsp. ambiguum)
Synonym
Galium ambiguum var. siskiyouense
(Under Galium ambiguum subsp. siskiyouense)
Synonym
Galium andrewsiiPHLOX-LEAVED BEDSTRAWNative
Galium andrewsii subsp. andrewsiiNative
Galium andrewsii subsp. gatensePHLOX-LEAF SERPENTINE BEDSTRAWNative
Galium andrewsii subsp. intermediumNative
Galium andrewsii var. gatense
(Under Galium andrewsii subsp. gatense)
Synonym
Galium angustifoliumNARROWLY LEAVED BEDSTRAWNative
Galium angustifolium subsp. angustifoliumNative
Galium angustifolium subsp. borregoenseBORREGO BEDSTRAWNative
Galium angustifolium subsp. foliosumNative
Galium angustifolium subsp. gabrielenseSAN ANTONIO CANYON BEDSTRAWNative
Galium angustifolium subsp. gracillimumSLENDER BEDSTRAWNative
Galium angustifolium subsp. jacinticumSAN JACINTO MOUNTAINS BEDSTRAWNative
Galium angustifolium subsp. nudicauleNative
Galium angustifolium subsp. onycenseONYX PEAK BEDSTRAWNative
Galium angustifolium var. foliosum
(Under Galium angustifolium subsp. foliosum)
Synonym
Galium angustifolium var. onycense
(Under Galium angustifolium subsp. onycense)
Synonym
Galium angustifolium var. pinetorum
(Under Galium johnstonii)
Synonym
Galium aparineGOOSE GRASSNative
Galium argenseNative
Galium bifoliumLOW MOUNTAIN BEDSTRAWNative
Galium bolanderiBOLANDER'S BEDSTRAWNative
Galium borealeNORTHERN BEDSTRAWNative
Galium boreale subsp. septentrionale
(Under Galium boreale)
Synonym
Galium buxifoliumBOX BEDSTRAWNative
Galium californicumCALIFORNIA BEDSTRAWNative
Galium californicum subsp. californicumNative
Galium californicum subsp. flaccidumNative
Galium californicum subsp. lucienseCONE PEAK BEDSTRAWNative
Galium californicum subsp. maritimumNative
Galium californicum subsp. miguelenseSAN MIGUEL ISLAND BEDSTRAWNative
Galium californicum subsp. primumALVIN MEADOW BEDSTRAWNative
Galium californicum subsp. sierraeEL DORADO BEDSTRAWNative
Galium californicum var. miguelense
(Under Galium californicum subsp. miguelense)
Synonym
Galium catalinenseNative
Galium catalinense subsp. acrispumSAN CLEMENTE ISLAND BEDSTRAWNative
Galium catalinense subsp. catalinenseSANTA CATALINA ISLAND BEDSTRAWNative
Galium clementisSANTA LUCIA BEDSTRAWNative
Galium cliftonsmithiiSANTA BARBARA BEDSTRAWNative
Galium cymosum
(Under Galium trifidum subsp. columbianum)
Synonym
Galium divaricatumLAMARCK'S BEDSTRAWNaturalized
Galium gabrielense
(Under Galium angustifolium subsp. gabrielense)
Synonym
Galium glabrescensNative
Galium glabrescens subsp. glabrescensNative
Galium glabrescens subsp. modocenseMODOC BEDSTRAWNative
Galium grandeSAN GABRIEL BEDSTRAWNative
Galium grayanumGRAY'S BEDSTRAWNative
Galium grayanum var. grayanumNative
Galium grayanum var. nanumNative
Galium halliiNODDING BEDSTRAWNative
Galium hardhamiaeHARDHAM'S BEDSTRAWNative
Galium hilendiaeHILEND'S BEDSTRAWNative
Galium hilendiae subsp. carneumPANAMINT MOUNTAINS BEDSTRAWNative
Galium hilendiae subsp. hilendiaeNative
Galium hilendiae subsp. kingstonenseKINGSTON MOUNTAINS BEDSTRAWNative
Galium hypotrichiumALPINE BEDSTRAWNative
Galium hypotrichium subsp. hypotrichiumNative
Galium hypotrichium subsp. inyoenseNative
Galium hypotrichium subsp. subalpinumNative
Galium hypotrichium subsp. tomentellumTELESCOPE PEAK BEDSTRAWNative
Galium jepsoniiJEPSON'S BEDSTRAWNative
Galium johnstoniiJOHNSTON'S BEDSTRAWNative
Galium magnifoliumNative
Galium matthewsiiMATTHEWS' BEDSTRAWNative
Galium mexicanum subsp. asperulumNative
Galium mexicanum var. asperulum
(Under Galium mexicanum subsp. asperulum)
Synonym
Galium mollugoHEDGE BEDSTRAWNaturalized
Galium multiflorumKELLOGG'S BEDSTRAWNative
Galium multiflorum f. hirsutum
(Under Galium multiflorum)
Synonym
Galium munziiMUNZ'S BEDSTRAWNative
Galium munzii var. carneum
(Under Galium hilendiae subsp. carneum)
Synonym
Galium munzii var. kingstonense
(Under Galium hilendiae subsp. kingstonense)
Synonym
Galium muraleTINY BEDSTRAWNaturalized
Galium muricatumHUMBOLDT BEDSTRAWNative
Galium nuttalliiSAN DIEGO BEDSTRAWNative
Galium nuttallii subsp. insulareNUTTALL'S ISLAND BEDSTRAWNative
Galium nuttallii subsp. nuttalliiNative
Galium nuttallii var. cliftonsmithii
(Under Galium cliftonsmithii)
Synonym
Galium nuttallii var. ovalifolium
(Under Galium porrigens var. porrigens)
Synonym
Galium nuttallii var. tenue
(Under Galium porrigens var. tenue)
Synonym
Galium oreganumOREGON BEDSTRAWNative
Galium parishiiPARISH'S BEDSTRAWNative
Galium parisienseWALL BEDSTRAWNaturalized
Galium porrigensCLIMBING BEDSTRAWNative
Galium porrigens var. porrigensNative
Galium porrigens var. tenueNative
Galium proliferumDESERT BEDSTRAWNative
Galium pubens
(Under Galium bolanderi)
Synonym
Galium serpenticumNative
Galium serpenticum subsp. scotticumSCOTT MOUNTAIN BEDSTRAWNative
Galium serpenticum subsp. warnerenseWARNER MOUNTAINS BEDSTRAWNative
Galium sparsiflorumSEQUOIA BEDSTRAWNative
Galium sparsiflorum subsp. glabriusNative
Galium sparsiflorum subsp. sparsiflorumNative
Galium stellatumNative
Galium stellatum subsp. eremicum
(Under Galium stellatum)
Synonym
Galium stellatum var. eremicum
(Under Galium stellatum)
Synonym
Galium tricornutumROUGH CORN BEDSTRAWNaturalized
Galium trifidumNative
Galium trifidum subsp. columbianumNative
Galium trifidum subsp. subbiflorumNative
Galium trifidum var. pacificum
(Under Galium trifidum subsp. columbianum)
Synonym
Galium trifidum var. pusillum
(Under Galium trifidum subsp. subbiflorum)
Synonym
Galium triflorumSWEET-SCENTED BEDSTRAWNative
Galium watsonii
(Under Galium multiflorum)
Synonym
Galium wrightiiWRIGHT'S BEDSTRAWNative
Galvezia speciosa
(Under Gambelia speciosa)
Synonym
Gambelia
Gambelia speciosaSHOWY ISLAND SNAPDRAGON, SHOWY GREENBRIGHTNative
Gamochaeta
  ↳  Key to Gamochaeta
CUDWEED
Gamochaeta argyrineaNaturalized
Gamochaeta calvicepsNaturalized
Gamochaeta coarctataNaturalized
Gamochaeta pensylvanicaNaturalized
Gamochaeta stachydifoliaWaif
Gamochaeta stagnalisNaturalized
Gamochaeta ustulataNative
Garrya
  ↳  Key to Garrya
SILK TASSEL BUSH
Garrya buxifoliaNative
Garrya congdoniiNative
Garrya ellipticaNative
Garrya flavescensNative
Garrya flavescens subsp. congdonii
(Under Garrya congdonii)
Synonym
Garrya flavescens var. pallida
(Under Garrya flavescens)
Synonym
Garrya fremontiiNative
Garrya veatchiiNative
GarryaceaeSILK TASSEL FAMILY
Gastridium
Gastridium phleoidesNIT GRASSNaturalized
Gastridium ventricosum
(Under Gastridium phleoides)
Misapplied name
GaudiniaFRAGILE-OAT
Gaudinia fragilisWaif
Gaultheria
  ↳  Key to Gaultheria
Gaultheria humifusaALPINE WINTERGREENNative
Gaultheria ovatifoliaSLENDER WINTERGREENNative
Gaultheria shallonSALALNative
Gaura coccinea
(Under Oenothera suffrutescens)
Synonym
Gaura coccinea var. glabra
(Under Oenothera suffrutescens)
Synonym
Gaura decorticans
(Under Eremothera boothii subsp. decorticans)
Synonym
Gaura drummondii
(Under Oenothera xenogaura)
Synonym
Gaura mollis
(Under Oenothera curtiflora)
Synonym
Gaura odorata
(Under Oenothera xenogaura)
Misapplied name
Gaura parviflora
(Under Oenothera curtiflora)
Synonym
Gaura parviflora var. lachnocarpa
(Under Oenothera curtiflora)
Synonym
Gaura sinuata
(Under Oenothera sinuosa)
Synonym
Gaura suffrutescens
(Under Oenothera suffrutescens)
Synonym
Gaura villosa var. mckelveyae
(Under Oenothera sinuosa)
Misapplied name
Gaura villosa var. villosa
(Under Oenothera sinuosa)
Misapplied name
Gayophytum
  ↳  Key to Gayophytum
Gayophytum decipiensNative
Gayophytum diffusumNative
Gayophytum diffusum subsp. diffusumNative
Gayophytum diffusum subsp. parviflorumNative
Gayophytum eriospermumNative
Gayophytum heterozygumNative
Gayophytum humileNative
Gayophytum nuttallii
(Under Gayophytum humile)
Synonym
Gayophytum oligospermumNative
Gayophytum racemosumNative
Gayophytum ramosissimumNative
GazaniaTREASURE FLOWER
Gazania linearisNaturalized
Gazania longiscapa
(Under Gazania linearis)
Synonym
Genista
  ↳  Key to Genista
BROOM
Genista canariensisNaturalized
Genista linifoliaNaturalized
Genista maderensisMADEIRA BROOMWaif
Genista monospermaBRIDAL VEIL BROOMNaturalized
Genista monspessulanaFRENCH BROOMNaturalized
Gentiana
  ↳  Key to Gentiana
GENTIAN
Gentiana affinis var. ovataOREGON GENTIANNative
Gentiana affinis var. parvidentata
(Under Gentiana affinis var. ovata)
Synonym
Gentiana amarella var. acuta
(Under Gentianella amarella subsp. acuta)
Synonym
Gentiana bisetaea
(Under Gentiana setigera)
Synonym
Gentiana calycosaEXPLORERS' GENTIANNative
Gentiana fremontiiFREMONT'S GENTIANNative
Gentiana holopetala
(Under Gentianopsis holopetala)
Synonym
Gentiana humilis
(Under Gentiana fremontii)
Illegitimate name
Gentiana newberryiALPINE GENTIANNative
Gentiana newberryi var. newberryiNative
Gentiana newberryi var. tioganaNative
Gentiana oregana
(Under Gentiana affinis var. ovata)
Synonym
Gentiana plurisetosaKLAMATH GENTIANNative
Gentiana prostrataPYGMY GENTIANNative
Gentiana sceptrumKING'S SCEPTER GENTIANNative
Gentiana setigeraMENDOCINO GENTIANNative
Gentiana simplex
(Under Gentianopsis simplex)
Synonym
Gentiana tenella
(Under Comastoma tenellum)
Synonym
Gentiana tiogana
(Under Gentiana newberryi var. tiogana)
Synonym
Gentianaceae
  ↳  Key to Gentianaceae
GENTIAN FAMILY
Gentianella
Gentianella amarella subsp. acutaNORTHERN GENTIANNative
Gentianella tenella
(Under Comastoma tenellum)
Synonym
Gentianella tenella subsp. tenella
(Under Comastoma tenellum)
Synonym
Gentianella tenella var. tenella
(Under Comastoma tenellum)
Synonym
Gentianopsis
  ↳  Key to Gentianopsis
FRINGED GENTIAN
Gentianopsis holopetalaSIERRA GENTIANNative
Gentianopsis simplexHIKERS' GENTIANNative
Geraea
  ↳  Key to Geraea
Geraea canescensDESERT-SUNFLOWERNative
Geraea viscidaSTICKY GERAEANative
Geraniaceae
  ↳  Key to Geraniaceae
GERANIUM FAMILY
Geranium
  ↳  Key to Geranium
CRANESBILL, GERANIUM
Geranium aequaleNaturalized
Geranium anemonifolium
(Under Geranium palmatum)
Illegitimate name
Geranium attenuilobum
(Under Geranium viscosissimum)
Synonym
Geranium bicknelliiNative
Geranium bicknellii var. longipes
(Under Geranium bicknellii)
Synonym
Geranium californicumNative
Geranium carolinianumNative
Geranium carolinianum var. carolinianum
(Under Geranium carolinianum)
Synonym
Geranium carolinianum var. sphaerospermum
(Under Geranium carolinianum)
Synonym
Geranium columbinumNaturalized
Geranium concinnum
(Under Geranium californicum)
Synonym
Geranium core-coreNaturalized
Geranium dissectumNaturalized
Geranium lucidumNaturalized
Geranium microphyllum
(Under Geranium potentilloides)
Synonym
Geranium molleNaturalized
Geranium oreganumNative
Geranium palmatumUrban weed
Geranium pilosum
(Under Geranium solanderi)
Synonym
Geranium pilosum
(Under Geranium solanderi)
Illegitimate name
Geranium potentilloidesNaturalized
Geranium purpureumNaturalized
Geranium pusillumNaturalized
Geranium pyrenaicumUrban weed
Geranium richardsoniiNative
Geranium robertianumNaturalized
Geranium rotundifoliumNaturalized
Geranium solanderiNaturalized
Geranium sphaerospermum
(Under Geranium carolinianum)
Synonym
Geranium texanumWaif
Geranium viscosissimumNative
Geranium viscosissimum var. incisum
(Under Geranium oreganum)
Synonym
Geum
  ↳  Key to Geum
Geum aleppicumALEPPO OR YELLOW AVENSNative
Geum canescens
(Under Geum triflorum var. ciliatum)
Synonym
Geum ciliatum
(Under Geum triflorum var. ciliatum)
Synonym
Geum macrophyllumLARGE-LEAVED AVENSNative
Geum macrophyllum var. macrophyllumNative
Geum macrophyllum var. perincisumNative
Geum strictum
(Under Geum aleppicum)
Synonym
Geum triflorum var. canescens
(Under Geum triflorum var. ciliatum)
Synonym
Geum triflorum var. ciliatumPRAIRIE-SMOKENative
Gilia
  ↳  Key to Gilia
Gilia achilleifoliaCALIFORNIA GILIANative
Gilia achilleifolia subsp. achilleifoliaNative
Gilia achilleifolia subsp. multicaulisNative
Gilia aliquantaPUFFCALYX GILIA, WESTERN GILIANative
Gilia aliquanta subsp. aliquantaNative
Gilia aliquanta subsp. brevilobaNative
Gilia alpina
(Under Gilia salticola)
Synonym
Gilia angelensisCHAPARRAL GILIANative
Gilia australis
(Under Saltugilia australis)
Synonym
Gilia austro-occidentalisSOUTHWESTERN GILIANative
Gilia brecciarumBREAK GILIA, NEVADA GILIANative
Gilia brecciarum subsp. argusana
(Under Gilia brecciarum subsp. neglecta)
Synonym
Gilia brecciarum subsp. brecciarumNative
Gilia brecciarum subsp. jacens
(Under Gilia jacens)
Synonym
Gilia brecciarum subsp. neglectaNative
Gilia campanulata
(Under Linanthus campanulatus)
Synonym
Gilia canaDESERT GILIA, SHOWY GILIANative
Gilia cana subsp. bernardinaNative
Gilia cana subsp. canaNative
Gilia cana subsp. speciformisNative
Gilia cana subsp. speciosaNative
Gilia cana subsp. tricepsNative
Gilia capillaris
(Under Navarretia capillaris)
Synonym
Gilia capitataBLUEHEAD GILIANative
Gilia capitata subsp. abrotanifoliaNative
Gilia capitata subsp. capitataNative
Gilia capitata subsp. chamissonisBLUE COAST GILIANative
Gilia capitata subsp. mediomontanaNative
Gilia capitata subsp. pacificaPACIFIC GILIANative
Gilia capitata subsp. pedemontanaNative
Gilia capitata subsp. stamineaNative
Gilia capitata subsp. tomentosaWOOLLY-HEADED GILIANative
Gilia caruifolia
(Under Saltugilia caruifolia)
Synonym
Gilia clivorumPURPLESPOT GILIANative
Gilia clokeyiCLOKEY'S GILIANative
Gilia diegensisCOASTAL GILIANative
Gilia filiformis
(Under Linanthus filiformis)
Synonym
Gilia humillima
(Under Aliciella humillima)
Synonym
Gilia hutchinsifolia
(Under Aliciella hutchinsifolia)
Synonym
Gilia inconspicuaSHY GILIANative
Gilia inconspicua var. oreophila
(Under Gilia achilleifolia subsp. multicaulis)
Synonym
Gilia interiorINLAND GILIANative
Gilia inyoensis
(Under Linanthus inyoensis)
Synonym
Gilia inyoensis var. breviuscula
(Under Linanthus inyoensis)
Synonym
Gilia jacensNative
Gilia jaegeri
(Under Linanthus jaegeri)
Synonym
Gilia latifloraBROAD-FLOWERED GILIANative
Gilia latiflora subsp. cosana
(Under Gilia cana subsp. cana)
Synonym
Gilia latiflora subsp. cuyamensisCUYAMA GILIANative
Gilia latiflora subsp. davyiDAVY'S BROAD-FLOWERED GILIANative
Gilia latiflora subsp. elongataNative
Gilia latiflora subsp. excellens
(Under Gilia latiflora subsp. davyi)
Synonym
Gilia latiflora subsp. latifloraBROAD-LEAVED GILIANative
Gilia latifolia
(Under Aliciella latifolia subsp. latifolia)
Synonym
Gilia latifolia subsp. latifolia
(Under Aliciella latifolia subsp. latifolia)
Synonym
Gilia latifolia var. latifolia
(Under Aliciella latifolia subsp. latifolia)
Synonym
Gilia latimeri
(Under Saltugilia latimeri)
Synonym
Gilia leptalea
(Under Navarretia leptalea)
Synonym
Gilia leptalea subsp. bicolor
(Under Navarretia leptalea subsp. bicolor)
Synonym
Gilia leptalea subsp. leptalea
(Under Navarretia leptalea subsp. leptalea)
Synonym
Gilia leptalea subsp. pinnnatisecta
(Under Navarretia linearifolia subsp. pinnatisecta)
Synonym
Gilia leptanthaFINEFLOWERED GILIANative
Gilia leptantha subsp. leptanthaSAN BERNARDINO GILIANative
Gilia leptantha subsp. pinetorumPINE GILIANative
Gilia leptantha subsp. purpusiiPURPUS' FINEFLOWERED GILIANative
Gilia leptantha subsp. salticola
(Under Gilia salticola)
Synonym
Gilia leptantha subsp. transversaNative
Gilia leptantha subsp. vivida
(Under Gilia ochroleuca subsp. vivida)
Synonym
Gilia leptomeria
(Under Aliciella leptomeria)
Synonym
Gilia lottiae
(Under Aliciella lottiae)
Synonym
Gilia maculata
(Under Linanthus maculatus)
Synonym
Gilia maliorSCRUB GILIA, GREAT BASIN GILIANative
Gilia mexicanaEL PASO GILIANative
Gilia micromeria
(Under Aliciella micromeria)
Synonym
Gilia millefoliataDARK-EYED GILIANative
Gilia minorLITTLE GILIANative
Gilia modocensisMODOC GILIANative
Gilia multicaulis
(Under Gilia achilleifolia subsp. multicaulis)
Synonym
Gilia neviniiNEVIN'S GILIANative
Gilia ochroleucaVOLCANIC GILIANative
Gilia ochroleuca subsp. bizonataNative
Gilia ochroleuca subsp. exilisNative
Gilia ochroleuca subsp. ochroleucaNative
Gilia ochroleuca subsp. vividaNative
Gilia ophthalmoidesEYED GILIA, YELLOW-EYED GILIANative
Gilia ripleyi
(Under Aliciella ripleyi)
Synonym
Gilia salticolaSALT GILIANative
Gilia scopulorumROCK GILIANative
Gilia sherman-hoytae
(Under Eriastrum pluriflorum subsp. sherman-hoytae)
Synonym
Gilia sinistra
(Under Navarretia sinistra)
Synonym
Gilia sinistra subsp. pinnatisecta
(Under Navarretia linearifolia subsp. pinnatisecta)
Synonym
Gilia sinuataROSY GILIANative
Gilia splendens
(Under Saltugilia splendens)
Synonym
Gilia splendens subsp. australis
(Under Saltugilia australis)
Synonym
Gilia splendens subsp. grantii
(Under Saltugilia splendens subsp. grantii)
Synonym
Gilia splendens subsp. splendens
(Under Saltugilia splendens subsp. splendens)
Synonym
Gilia stellataSTAR GILIANative
Gilia subacaulis
(Under Aliciella monoensis)
Misapplied name
Gilia tenerrima
(Under Lathrocasis tenerrima)
Synonym
Gilia tenuifloraNative
Gilia tenuiflora subsp. amplifaucalisTRUMPET-THROATED GILIANative
Gilia tenuiflora subsp. arenariaMONTEREY GILIANative
Gilia tenuiflora subsp. docmilleriSANTA LUCIA GILIANative
Gilia tenuiflora subsp. hoffmanniiHOFFMANN'S SLENDER-FLOWERED GILIANative
Gilia tenuiflora subsp. tenuifloraSLENDER-FLOWERED GILIA, GREATER YELLOWTHROAT GILIANative
Gilia transmontanaTRANSMONTANE GILIANative
Gilia tricolorBIRD'S-EYE GILIANative
Gilia tricolor subsp. diffusaNative
Gilia tricolor subsp. tricolorNative
Gilia triodon
(Under Aliciella triodon)
Synonym
Gilia yorkiiMONARCH GILIANative
GilmaniaGOLDEN-CARPET
Gilmania luteolaGOLDEN-CARPET GILMANIANative
Githopsis
  ↳  Key to Githopsis
BLUECUP
Githopsis calycina
(Under Githopsis specularioides)
Synonym
Githopsis diffusaNative
Githopsis diffusa subsp. candidaNative
Githopsis diffusa subsp. diffusaNative
Githopsis diffusa subsp. filicaulisMISSION CANYON BLUECUPNative
Githopsis diffusa subsp. robustaNative
Githopsis filicaulis
(Under Githopsis diffusa subsp. filicaulis)
Synonym
Githopsis gilioides
(Under Githopsis diffusa subsp. diffusa)
Synonym
Githopsis pulchellaNative
Githopsis pulchella subsp. campestrisNative
Githopsis pulchella subsp. pulchellaNative
Githopsis pulchella subsp. serpentinicolaSERPENTINE BLUECUPNative
Githopsis pulchella var. glabraNative
Githopsis pulchella var. pulchellaNative
Githopsis specularioidesNative
Githopsis specularioides subsp. candida
(Under Githopsis diffusa subsp. candida)
Synonym
Githopsis specularioides var. glabra
(Under Githopsis pulchella var. glabra)
Synonym
Githopsis tenellaDELICATE BLUECUPNative
Glandularia gooddingii
(Under Verbena gooddingii)
Synonym
Glandularia pulchella
(Under Verbena pulchella)
Synonym
Glaucium
Glaucium flavumSEA POPPYWaif
Glaux maritima
(Under Lysimachia maritima)
Synonym
Glebionis
  ↳  Key to Glebionis
Glebionis coronariaGARLAND or CROWN DAISYNaturalized
Glebionis coronaria var. discolor
(Under Glebionis coronaria)
Synonym
Glebionis segetumCORN CHRYSANTHEMUMNaturalized
GlechomaGROUND IVY
Glechoma hederaceaNaturalized
GleditsiaHONEY LOCUST
Gleditsia triacanthosHONEY LOCUSTNaturalized
Glehnia
Glehnia leiocarpa
(Under Glehnia littoralis subsp. leiocarpa)
Synonym
Glehnia littoralis subsp. leiocarpaAMERICAN GLEHNIANative
Glinus
  ↳  Key to Glinus
DAMASCISA
Glinus lotoidesNaturalized
Glinus radiatusSHINING DAMASCISANaturalized
Glossopetalon
  ↳  Key to Glossopetalon
Glossopetalon pungensPUNGENT GLOSSOPETALONNative
Glossopetalon spinescens var. aridumNEVADA GREASEWOODNative
Glyceria
  ↳  Key to Glyceria
MANNA GRASS
Glyceria ×occidentalisWESTERN MANNA GRASSNaturalized
Glyceria borealisBOREAL MANNA GRASSNative
Glyceria davyi
(Under Glyceria leptostachya)
Synonym
Glyceria declinataLOW MANNA GRASSNaturalized
Glyceria elataFOWL MANNA GRASSNative
Glyceria fluitansWATER MANNA GRASSNaturalized
Glyceria grandisAMERICAN MANNA GRASSNative
Glyceria grandis var. grandis
(Under Glyceria grandis)
Synonym
Glyceria leptostachyaNARROW MANNA GRASSNative
Glyceria occidentalis
(Under Glyceria ×occidentalis)
Synonym
Glyceria striataRIDGED MANNA GRASSNative
Glycyrrhiza
  ↳  Key to Glycyrrhiza
Glycyrrhiza glabraLICORICENaturalized
Glycyrrhiza lepidotaWILD LICORICENative
Glyptopleura
  ↳  Key to Glyptopleura
Glyptopleura marginataNative
Glyptopleura setulosaNative
GnaphaliumCUDWEED
Gnaphalium beneolens
(Under Pseudognaphalium beneolens)
Synonym
Gnaphalium bicolor
(Under Pseudognaphalium biolettii)
Illegitimate name
Gnaphalium californicum
(Under Pseudognaphalium californicum)
Synonym
Gnaphalium canescens
(Under Pseudognaphalium canescens)
Synonym
Gnaphalium canescens subsp. beneolens
(Under Pseudognaphalium beneolens)
Synonym
Gnaphalium canescens subsp. microcephalum
(Under Pseudognaphalium microcephalum)
Synonym
Gnaphalium canescens subsp. thermale
(Under Pseudognaphalium thermale)
Synonym
Gnaphalium chilense
(Under Pseudognaphalium stramineum)
Synonym
Gnaphalium collinum
(Under Euchiton gymnocephalus)
Illegitimate name
Gnaphalium gymnocephalum
(Under Euchiton gymnocephalus)
Synonym
Gnaphalium japonicum
(Under Euchiton sphaericus)
Misapplied name
Gnaphalium leucocephalum
(Under Pseudognaphalium leucocephalum)
Synonym
Gnaphalium luteo-album
(Under Pseudognaphalium luteoalbum)
Orthographic variant
Gnaphalium luteoalbum
(Under Pseudognaphalium luteoalbum)
Synonym
Gnaphalium macounii
(Under Pseudognaphalium macounii)
Synonym
Gnaphalium microcephalum
(Under Pseudognaphalium microcephalum)
Synonym
Gnaphalium microcephalum var. thermale
(Under Pseudognaphalium thermale)
Synonym
Gnaphalium palustreNative
Gnaphalium purpureum
(Under Gamochaeta ustulata)
Unabridged misapplied name
Gnaphalium ramosissimum
(Under Pseudognaphalium ramosissimum)
Synonym
Gnaphalium roseum
(Under Pseudognaphalium roseum)
Synonym
Gnaphalium stramineum
(Under Pseudognaphalium stramineum)
Synonym
Gnaphalium thermale
(Under Pseudognaphalium thermale)
Synonym
Gnaphalium wrightii
(Under Pseudognaphalium canescens)
Synonym
Gomphocarpus fruticosus
(Under Asclepias fruticosa)
Synonym
Gonolobus californicus
(Under Matelea parvifolia)
Synonym
Goodmania
Goodmania luteolaGOLDEN GOODMANIANative
Goodyera
Goodyera oblongifoliaRATTLESNAKE-PLANTAINNative
Gormania burnhamii
(Under Sedum obtusatum)
Synonym
Gormania eastwoodiae
(Under Sedum eastwoodiae)
Synonym
Gormania hallii
(Under Sedum obtusatum)
Synonym
Gormania obtusata
(Under Sedum obtusatum)
Synonym
Gormania retusa
(Under Sedum sanhedrinum)
Synonym
GossypiumCOTTON
Gossypium hirsutumCOTTONWaif
Graphephorum wolfii
(Under Trisetum wolfii)
Synonym
Gratiola
  ↳  Key to Gratiola
HEDGE-HYSSOP
Gratiola ebracteataBRACTLESS HEDGE-HYSSOPNative
Gratiola heterosepalaBOGGS LAKE HEDGE-HYSSOPNative
Gratiola neglectaCLAMMY HEDGE-HYSSOPNative
GrayiaHOP-SAGE
Grayia spinosaNative
Greeneocharis
  ↳  Key to Greeneocharis
Greeneocharis circumscissaNative
Greeneocharis circumscissa var. circumscissaCUSHION GREENEOCHARISNative
Greeneocharis circumscissa var. rosulataROSETTE CUSHION GREENEOCHARISNative
Greeneocharis similisDOME GREENEOCHARISNative
Grevillea
Grevillea robustaNaturalized
Grindelia
  ↳  Key to Grindelia
GUMPLANT
Grindelia ×paludosaSUISUN GUMPLANTNative
Grindelia arenicola
(Under Grindelia stricta var. stricta)
Synonym
Grindelia blakei
(Under Grindelia stricta var. stricta)
Synonym
Grindelia camporumNative
Grindelia camporum var. bracteosa
(Under Grindelia camporum)
Synonym
Grindelia camporum var. bracteosum
(Under Grindelia camporum)
Orthographic variant
Grindelia fraxinipratensisASH MEADOWS GUMPLANTNative
Grindelia fraxino-pratensis
(Under Grindelia fraxinipratensis)
Orthographic variant
Grindelia halliiSAN DIEGO GUMPLANTNative
Grindelia hirsutulaNative
Grindelia hirsutula var. davyi
(Under Grindelia camporum)
Synonym
Grindelia hirsutula var. hallii
(Under Grindelia hallii)
Synonym
Grindelia hirsutula var. maritima
(Under Grindelia hirsutula)
Synonym
Grindelia latifolia
(Under Grindelia stricta var. platyphylla)
Synonym
Grindelia nanaNative
Grindelia nana var. altissima
(Under Grindelia nana)
Synonym
Grindelia nana var. turbinella
(Under Grindelia nana)
Synonym
Grindelia squarrosa var. serrulataNaturalized
Grindelia strictaNative
Grindelia stricta var. angustifoliaMARSH GUMPLANTNative
Grindelia stricta var. platyphyllaNative
Grindelia stricta var. strictaNative
GrossulariaceaeGOOSEBERRY FAMILY
Grusonia
  ↳  Key to Grusonia
CLUB-CHOLLA
Grusonia parishiiPARISH'S CLUB-CHOLLANative
Grusonia pulchellaBEAUTIFUL CLUB-CHOLLANative
Gruvelia
Gruvelia pusillaLITTLE GRUVELIANative
Guilleminea
Guilleminea densa var. aggregataSMALL MATWEEDWaif
Guillenia cooperi
(Under Caulanthus cooperi)
Synonym
Guillenia flavescens
(Under Caulanthus flavescens)
Synonym
Guillenia heterophylla
(Under Caulanthus heterophyllus)
Synonym
Guillenia lasiophylla
(Under Caulanthus lasiophyllus)
Synonym
Guillenia lemmonii
(Under Caulanthus anceps)
Synonym ined.
Gunnera
Gunnera chilensis
(Under Gunnera tinctoria)
Synonym
Gunnera tinctoriaCHILEAN-RHUBARBNaturalized
GunneraceaeGUNNERA FAMILY
Gutierrezia
  ↳  Key to Gutierrezia
SNAKEWEED, MATCHWEED
Gutierrezia bracteata
(Under Gutierrezia californica)
Synonym
Gutierrezia californicaCALIFORNIA MATCHWEEDNative
Gutierrezia microcephalaSTICKY SNAKEWEEDNative
Gutierrezia sarothraeMATCHWEEDNative
Gymnosteris
Gymnosteris parvulaNative
Gypsophila
  ↳  Key to Gypsophila
BABY'S-BREATH
Gypsophila elegansSHOWY BABY'S-BREATHNaturalized
Gypsophila elegans var. elegans
(Under Gypsophila elegans)
Synonym
Gypsophila paniculataBABY'S-BREATHNaturalized
Gypsophila paniculata var. paniculata
(Under Gypsophila paniculata)
Synonym
Gypsophila scorzonerifoliaGLANDULAR BABY'S-BREATHWaif
Gypsophila vaccariaCOW-HERBNaturalized
Habenaria dilatata var. leucostachys
(Under Platanthera dilatata var. leucostachys)
Synonym
Habenaria elegans var. elata
(Under Piperia elongata)
Synonym
Habenaria elegans var. maritima
(Under Piperia elegans subsp. elegans)
Synonym
Habenaria elegans var. multiflora
(Under Piperia elegans subsp. elegans)
Synonym
Habenaria greenei
(Under Piperia elegans subsp. elegans)
Synonym
Habenaria leucostachys var. virida
(Under Platanthera sparsiflora)
Synonym
Habenaria saccata
(Under Platanthera stricta)
Synonym
Habenaria unalascensis
(Under Piperia unalascensis)
Synonym
Hackelia
  ↳  Key to Hackelia
STICKSEED
Hackelia amethystinaAMETHYST STICKSEEDNative
Hackelia bellaBEAUTIFUL STICKSEEDNative
Hackelia breviculaPOISON CANYON STICKSEEDNative
Hackelia californicaCALIFORNIA STICKSEEDNative
Hackelia cusickiiCUSICK'S STICKSEEDNative
Hackelia floribundaMANY-FLOWERED STICKSEEDNative
Hackelia jessicae
(Under Hackelia micrantha)
Synonym
Hackelia longituba
(Under Hackelia velutina)
Synonym
Hackelia micranthaJESSICA'S STICKSEED, MEADOW STICKSEEDNative
Hackelia mundulaPINK-FLOWERED STICKSEEDNative
Hackelia nervosaSIERRAN STICKSEEDNative
Hackelia setosaBRISTLY STICKSEED, SISKIYOU STICKSEEDNative
Hackelia sharsmithiiSHARSMITH'S STICKSEEDNative
Hackelia velutinaVELVETY STICKSEEDNative
HainardiaBARB GRASS
Hainardia cylindricaNaturalized
Halerpestes cymbalaria
(Under Ranunculus cymbalaria)
Synonym
Halimodendron
Halimodendron halodendronRUSSIAN SALT TREEAgricultural weed
Halimolobos
Halimolobos diffusa var. jaegeri
(Under Halimolobos jaegeri)
Synonym
Halimolobos jaegeriNative
Halimolobos virgata
(Under Transberingia bursifolia subsp. virgata)
Synonym
Halogeton
Halogeton glomeratusSALTLOVERNaturalized
HaloragaceaeWATER-MILFOIL FAMILY
Haplopappus acaulis
(Under Stenotus acaulis)
Synonym
Haplopappus acradenius subsp. bracteosus
(Under Isocoma acradenia var. bracteosa)
Synonym
Haplopappus acradenius subsp. eremophilus
(Under Isocoma acradenia var. eremophila)
Synonym
Haplopappus apargioides
(Under Pyrrocoma apargioides)
Synonym
Haplopappus arborescens
(Under Ericameria arborescens)
Synonym
Haplopappus bloomeri
(Under Ericameria bloomeri)
Synonym
Haplopappus brickellioides
(Under Hazardia brickellioides)
Synonym
Haplopappus canus
(Under Hazardia cana)
Synonym
Haplopappus carthamoides subsp. cusickii
(Under Pyrrocoma carthamoides var. cusickii)
Synonym
Haplopappus cuneatus var. spathulatus
(Under Ericameria cuneata var. spathulata)
Synonym
Haplopappus eastwoodiae
(Under Ericameria fasciculata)
Synonym
Haplopappus ericoides
(Under Ericameria ericoides)
Synonym
Haplopappus ericoides subsp. blakei
(Under Ericameria ericoides)
Synonym
Haplopappus eximius
(Under Tonestus eximius)
Synonym
Haplopappus eximius subsp. peirsonii
(Under Tonestus peirsonii)
Synonym
Haplopappus gilmanii
(Under Ericameria gilmanii)
Synonym
Haplopappus greenei
(Under Ericameria greenei)
Synonym
Haplopappus hirtus subsp. hirtus
(Under Pyrrocoma hirta var. hirta)
Synonym
Haplopappus hirtus subsp. lanulosus
(Under Pyrrocoma hirta var. lanulosa)
Synonym
Haplopappus hirtus var. lanulosus
(Under Pyrrocoma hirta var. lanulosa)
Synonym
Haplopappus lanceolatus
(Under Pyrrocoma lanceolata var. lanceolata)
Synonym
Haplopappus lanceolatus subsp. tenuicaulis
(Under Pyrrocoma lanceolata var. lanceolata)
Synonym
Haplopappus laricifolius
(Under Ericameria laricifolia)
Synonym
Haplopappus linearifolius
(Under Ericameria linearifolia)
Synonym
Haplopappus lucidus
(Under Pyrrocoma lucida)
Synonym
Haplopappus lyallii
(Under Tonestus lyallii)
Synonym
Haplopappus macronema
(Under Ericameria discoidea)
Synonym
Haplopappus nanus
(Under Ericameria nana)
Synonym
Haplopappus occidentalis
(Under Benitoa occidentalis)
Synonym
Haplopappus ophitidis
(Under Ericameria ophitidis)
Synonym
Haplopappus peirsonii
(Under Tonestus peirsonii)
Synonym
Haplopappus pinifolius
(Under Ericameria pinifolia)
Synonym
Haplopappus propinquus
(Under Ericameria brachylepis)
Synonym
Haplopappus racemosus subsp. congestus
(Under Pyrrocoma racemosa var. congesta)
Synonym
Haplopappus racemosus subsp. glomeratus
(Under Pyrrocoma racemosa var. paniculata)
Synonym
Haplopappus racemosus subsp. pinetorum
(Under Pyrrocoma racemosa var. pinetorum)
Synonym
Haplopappus racemosus subsp. sessiliflorus
(Under Pyrrocoma racemosa var. sessiliflora)
Synonym
Haplopappus squarrosus subsp. grindelioides
(Under Hazardia squarrosa var. grindelioides)
Synonym
Haplopappus squarrosus subsp. obtusus
(Under Hazardia squarrosa var. obtusa)
Synonym
Haplopappus squarrosus subsp. stenolepis
(Under Hazardia stenolepis)
Synonym
Haplopappus stenophyllus
(Under Nestotus stenophyllus)
Synonym
Haplopappus suffruticosus
(Under Ericameria suffruticosa)
Synonym
Haplopappus uniflorus subsp. gossypinus
(Under Pyrrocoma uniflora var. gossypina)
Synonym
Haplopappus venetus subsp. argutus
(Under Isocoma arguta)
Synonym
Haplopappus venetus subsp. furfuraceus
(Under Isocoma menziesii var. menziesii)
Synonym
Haplopappus whitneyi subsp. discoideus
(Under Hazardia whitneyi var. discoidea)
Synonym
Harmonia
  ↳  Key to Harmonia
Harmonia doris-nilesiaeNILES' HARMONIANative
Harmonia guggolziorumGUGGOLZ'S HARMONIANative
Harmonia halliiHALL'S HARMONIANative
Harmonia nutansNODDING HARMONIANative
Harmonia stebbinsiiSTEBBINS' HARMONIANative
HarpagonellaGRAPPLINGHOOK
Harpagonella palmeriPALMER'S GRAPPLINGHOOKNative
Hartmaniella
Hartmaniella sierraeSIERRA STARWORTNative
Hastingsia
  ↳  Key to Hastingsia
Hastingsia albaNative
Hastingsia serpentinicolaNative
Hazardia
  ↳  Key to Hazardia
GOLDENBUSH
Hazardia brickellioidesBRICKELL GOLDENBUSHNative
Hazardia canaSAN CLEMENTE ISLAND HAZARDIANative
Hazardia detonsaISLAND HAZARDIANative
Hazardia orcuttiiORCUTT'S HAZARDIANative
Hazardia squarrosaSAW-TOOTHED GOLDENBUSHNative
Hazardia squarrosa var. grindelioidesNative
Hazardia squarrosa var. obtusaNative
Hazardia squarrosa var. squarrosaNative
Hazardia stenolepisNative
Hazardia whitneyiWHITNEY'S GOLDENBUSHNative
Hazardia whitneyi var. discoideaNative
Hazardia whitneyi var. whitneyiNative
Hecastocleis
Hecastocleis shockleyiNative
Hedeoma
  ↳  Key to Hedeoma
MOCK PENNYROYAL
Hedeoma drummondiiDRUMMOND'S FALSE PENNYROYALNative
Hedeoma nana subsp. californicaCALIFORNIA MOCK PENNYROYALNative
Hedeoma nanum subsp. californicum
(Under Hedeoma nana subsp. californica)
Orthographic variant
Hedera
  ↳  Key to Hedera
IVY
Hedera canariensisCANARY ISLANDS IVYNaturalized
Hedera helixENGLISH IVYNaturalized
Hedera helix subsp. canariensis
(Under Hedera canariensis)
Synonym
Hedera helix subsp. helix
(Under Hedera helix)
Synonym
HedychiumGINGER-LILY
Hedychium flavescensYELLOW GINGERWaif
Hedypnois
Hedypnois cretica
(Under Hedypnois rhagadioloides)
Synonym
Hedypnois rhagadioloidesCRETE WEEDNaturalized
Heleniastrum autumnale
(Under Helenium autumnale)
Synonym
Heleniastrum bigelovii
(Under Helenium bigelovii)
Synonym
Heleniastrum bolanderi
(Under Helenium bolanderi)
Synonym
Heleniastrum occidentale
(Under Helenium bigelovii)
Synonym
Heleniastrum puberulum
(Under Helenium puberulum)
Synonym
Heleniastrum rivulare
(Under Helenium bigelovii)
Synonym
Helenium
  ↳  Key to Helenium
SNEEZEWEED
Helenium altissimum
(Under Helenium autumnale)
Synonym
Helenium amarum var. amarumNaturalized
Helenium autumnaleNative
Helenium autumnale var. canaliculatum
(Under Helenium autumnale)
Synonym
Helenium autumnale var. fylesii
(Under Helenium autumnale)
Synonym
Helenium autumnale var. grandiflorum
(Under Helenium autumnale)
Synonym
Helenium autumnale var. montanum
(Under Helenium autumnale)
Synonym
Helenium autumnale var. parviflorum
(Under Helenium autumnale)
Synonym
Helenium bigeloviiNative
Helenium bigelovii var. festivum
(Under Helenium bolanderi)
Synonym
Helenium bolanderiNative
Helenium californicum
(Under Helenium puberulum)
Synonym
Helenium canaliculatum
(Under Helenium autumnale)
Synonym
Helenium decurrens
(Under Helenium puberulum)
Synonym
Helenium edwardsianum
(Under Helenium autumnale)
Synonym
Helenium grandiflorum
(Under Helenium autumnale)
Synonym
Helenium hoopesii
(Under Hymenoxys hoopesii)
Synonym
Helenium huronense
(Under Helenium autumnale)
Synonym
Helenium latifolium
(Under Helenium autumnale)
Synonym
Helenium macranthum
(Under Helenium autumnale)
Synonym
Helenium montanum
(Under Helenium autumnale)
Synonym
Helenium parviflorum
(Under Helenium autumnale)
Synonym
Helenium puberulumNative
Helenium pubescens
(Under Helenium puberulum)
Synonym
Helenium rivulare
(Under Helenium bigelovii)
Synonym
Helenium rosilla
(Under Helenium puberulum)
Synonym
Helenium tenuifolium
(Under Helenium amarum var. amarum)
Synonym
Heleochloa schoenoides
(Under Crypsis schoenoides)
Synonym
Helianthella
  ↳  Key to Helianthella
Helianthella californicaNative
Helianthella californica subsp. californica
(Under Helianthella californica var. californica)
Synonym
Helianthella californica subsp. nevadensis
(Under Helianthella californica var. nevadensis)
Synonym
Helianthella californica subsp. shastensis
(Under Helianthella californica var. shastensis)
Synonym
Helianthella californica var. californicaNative
Helianthella californica var. nevadensisNative
Helianthella californica var. shastensisNative
Helianthella castaneaDIABLO HELIANTHELLANative
Helianthemum aldersonii
(Under Crocanthemum aldersonii)
Synonym
Helianthemum greenei
(Under Crocanthemum greenei)
Synonym
Helianthemum guttatum
(Under Tuberaria guttata)
Synonym
Helianthemum scoparium
(Under Crocanthemum aldersonii)
Synonym, in part
Helianthemum scoparium
(Under Crocanthemum scoparium)
Synonym, in part
Helianthemum scoparium
(Under Crocanthemum scoparium var. scoparium)
Synonym, in part
Helianthemum scoparium
(Under Crocanthemum scoparium var. vulgare)
Synonym, in part
Helianthemum scoparium
(Under Crocanthemum suffrutescens)
Synonym, in part
Helianthemum scoparium var. aldersonii
(Under Crocanthemum aldersonii)
Synonym
Helianthemum scoparium var. scoparium
(Under Crocanthemum scoparium var. scoparium)
Synonym
Helianthemum scoparium var. vulgare
(Under Crocanthemum scoparium var. vulgare)
Synonym
Helianthemum suffrutescens
(Under Crocanthemum suffrutescens)
Synonym
Helianthus
  ↳  Key to Helianthus
SUNFLOWER
Helianthus annuusNative
Helianthus annuus subsp. jaegeri
(Under Helianthus annuus)
Synonym
Helianthus annuus subsp. lenticularis
(Under Helianthus annuus)
Synonym
Helianthus annuus var. macrocarpus
(Under Helianthus annuus)
Synonym
Helianthus bolanderiBOLANDER'S SUNFLOWERNative
Helianthus californicusCALIFORNIA SUNFLOWERNative
Helianthus ciliarisBLUEWEEDNaturalized
Helianthus cusickiiCUSICK'S SUNFLOWERNative
Helianthus exilis
(Under Helianthus bolanderi)
Synonym
Helianthus gracilentusSLENDER SUNFLOWERNative
Helianthus inexpectatusNEWHALL SUNFLOWERNative
Helianthus niveus subsp. canescens
(Under Helianthus petiolaris subsp. canescens)
Synonym
Helianthus niveus subsp. tephrodesALGODONES DUNES SUNFLOWERNative
Helianthus nuttalliiNative
Helianthus nuttallii subsp. nuttalliiNUTTALL'S SUNFLOWERNative
Helianthus nuttallii subsp. parishiiLOS ANGELES SUNFLOWERNative
Helianthus petiolarisPRAIRIE SUNFLOWERNative
Helianthus petiolaris subsp. canescensNative
Helianthus petiolaris subsp. petiolarisNaturalized
Helianthus winteriNative
Helichrysum
Helichrysum orbiculare
(Under Plecostachys serpyllifolia)
Synonym
Helichrysum petiolareLICORICE PLANTNaturalized
Helichrysum serpyllifolium
(Under Plecostachys serpyllifolia)
Synonym
HeliomerisGOLDEN-EYE
Heliomeris multiflora var. nevadensisNEVADA GOLDENEYENative
HeliotropiaceaeHELIOTROPE FAMILY
Heliotropium
  ↳  Key to Heliotropium
HELIOTROPE
Heliotropium amplexicauleFRAGRANT HELIOTROPENaturalized
Heliotropium californicum
(Under Heliotropium convolvulaceum var. californicum)
Synonym
Heliotropium convolvulaceum var. californicumMORNING-GLORY HELIOTROPENative
Heliotropium curassavicum var. oculatumSEASIDE HELIOTROPE, ALKALI HELIOTROPENative
Heliotropium europaeumEUROPEAN HELIOTROPENaturalized
Heliotropium oculatum
(Under Heliotropium curassavicum var. oculatum)
Synonym
Heliotropium spathulatum subsp. oculatum
(Under Heliotropium curassavicum var. oculatum)
Synonym
HelminthothecaOX-TONGUE
Helminthotheca echioidesBRISTLY OX-TONGUENaturalized
Helxine soleirolii
(Under Soleirolia soleirolii)
Synonym
Hemicarpha micrantha
(Under Lipocarpha micrantha)
Synonym
Hemicarpha micrantha var. aristulata
(Under Lipocarpha aristulata)
Synonym
Hemicarpha micrantha var. minor
(Under Lipocarpha micrantha)
Synonym
Hemicarpha occidentalis
(Under Lipocarpha occidentalis)
Synonym
Hemieva
Hemieva ranunculifoliaNative
HemitomesGNOME PLANT
Hemitomes congestumNative
HemizonellaMINIATURE TARWEED
Hemizonella minimaNative
HemizoniaHAYFIELD TARWEED
Hemizonia angustifolia
(Under Deinandra corymbosa)
Synonym
Hemizonia arida
(Under Deinandra arida)
Synonym
Hemizonia calyculata
(Under Hemizonia congesta subsp. calyculata)
Synonym
Hemizonia clementina
(Under Deinandra clementina)
Synonym
Hemizonia clevelandii
(Under Hemizonia congesta subsp. clevelandii)
Synonym
Hemizonia congesta
  ↳  Key to Hemizonia congesta
Native
Hemizonia congesta subsp. calyculataMENDOCINO TARPLANTNative
Hemizonia congesta subsp. clevelandiiNative
Hemizonia congesta subsp. congestaCONGESTED-HEADED HAYFIELD TARPLANTNative
Hemizonia congesta subsp. congesta
(Under Hemizonia congesta subsp. lutescens)
Misapplied name
Hemizonia congesta subsp. leucocephala
(Under Hemizonia congesta subsp. congesta)
Synonym
Hemizonia congesta subsp. lutescensNative
Hemizonia congesta subsp. luzulifoliaNative
Hemizonia congesta subsp. tracyiTRACY'S TARPLANTNative
Hemizonia congesta subsp. vernalis
(Under Hemizonia congesta subsp. congesta)
Synonym
Hemizonia conjugens
(Under Deinandra conjugens)
Synonym
Hemizonia corymbosa
(Under Deinandra corymbosa)
Synonym
Hemizonia corymbosa subsp. macrocephala
(Under Deinandra corymbosa)
Synonym
Hemizonia fasciculata
(Under Deinandra fasciculata)
Synonym
Hemizonia fitchii
(Under Centromadia fitchii)
Synonym
Hemizonia floribunda
(Under Deinandra floribunda)
Synonym
Hemizonia halliana
(Under Deinandra halliana)
Synonym
Hemizonia increscens subsp. foliosa
(Under Deinandra paniculata)
Synonym
Hemizonia increscens subsp. increscens
(Under Deinandra increscens subsp. increscens)
Synonym
Hemizonia increscens subsp. villosa
(Under Deinandra increscens subsp. villosa)
Synonym
Hemizonia kelloggii
(Under Deinandra kelloggii)
Synonym
Hemizonia lobbii
(Under Deinandra lobbii)
Synonym
Hemizonia lutescens
(Under Hemizonia congesta subsp. lutescens)
Synonym
Hemizonia luzulifolia
(Under Hemizonia congesta subsp. luzulifolia)
Synonym
Hemizonia luzulifolia subsp. luzulifolia
(Under Hemizonia congesta subsp. luzulifolia)
Synonym
Hemizonia luzulifolia subsp. rudis
(Under Hemizonia congesta subsp. luzulifolia)
Synonym
Hemizonia minthornii
(Under Deinandra minthornii)
Synonym
Hemizonia mohavensis
(Under Deinandra mohavensis)
Synonym
Hemizonia oppositifolia
(Under Calycadenia oppositifolia)
Synonym
Hemizonia pallida
(Under Deinandra pallida)
Synonym
Hemizonia paniculata
(Under Deinandra paniculata)
Synonym
Hemizonia parryi
(Under Centromadia parryi)
Synonym
Hemizonia parryi subsp. australis
(Under Centromadia parryi subsp. australis)
Synonym
Hemizonia parryi subsp. congdonii
(Under Centromadia parryi subsp. congdonii)
Synonym
Hemizonia parryi subsp. parryi
(Under Centromadia parryi subsp. parryi)
Synonym
Hemizonia parryi subsp. rudis
(Under Centromadia parryi subsp. rudis)
Synonym
Hemizonia pentactis
(Under Deinandra pentactis)
Synonym
Hemizonia pungens
(Under Centromadia pungens)
Synonym
Hemizonia pungens subsp. laevis
(Under Centromadia pungens subsp. laevis)
Synonym
Hemizonia pungens subsp. maritima
(Under Centromadia pungens subsp. pungens)
Synonym
Hemizonia pungens subsp. septentrionalis
(Under Centromadia pungens subsp. pungens)
Synonym
HeracleumHOGWEED
Heracleum lanatum
(Under Heracleum maximum)
Synonym
Heracleum maximumCOW PARSNIP, GIANT HOGWEEDNative
HerissantiaBLADDER MALLOW
Herissantia crispaCURLY HERISSANTIANative
Hermidium alipes
(Under Mirabilis alipes)
Synonym
HerniariaRUPTUREWORT
Herniaria cinerea
(Under Herniaria hirsuta var. cinerea)
Synonym
Herniaria hirsuta
  ↳  Key to Herniaria hirsuta
Naturalized
Herniaria hirsuta subsp. cinerea
(Under Herniaria hirsuta var. cinerea)
Synonym
Herniaria hirsuta subsp. hirsuta
(Under Herniaria hirsuta var. hirsuta)
Synonym
Herniaria hirsuta var. cinereaNaturalized
Herniaria hirsuta var. hirsutaNaturalized
Herpestris pilosa
(Under Mimetanthe pilosa)
Synonym
Hesperevax
  ↳  Key to Hesperevax
Hesperevax acaulisDWARF EVAXNative
Hesperevax acaulis var. acaulisSTEMLESS EVAXNative
Hesperevax acaulis var. ambusticolaFIRE EVAXNative
Hesperevax acaulis var. robustiorNative
Hesperevax caulescensHOGWALLOW STARFISHNative
Hesperevax sparsifloraERECT EVAXNative
Hesperevax sparsiflora var. brevifoliaSHORTLEAVED EVAXNative
Hesperevax sparsiflora var. sparsifloraNative
Hesperidanthus
Hesperidanthus jaegeriNative
HesperisROCKET
Hesperis matronalisDAME'S ROCKETNaturalized
HesperocallisDESERT LILY
Hesperocallis undulataNative
Hesperochiron
  ↳  Key to Hesperochiron
Hesperochiron californicus
(Under Hesperochiron nanus)
Synonym
Hesperochiron californicus subvar. lasianthus
(Under Hesperochiron nanus)
Synonym
Hesperochiron californicus subvar. leporinus
(Under Hesperochiron nanus)
Synonym
Hesperochiron californicus var. benthamianus
(Under Hesperochiron nanus)
Synonym
Hesperochiron californicus var. incanus
(Under Hesperochiron nanus)
Synonym
Hesperochiron californicus var. latifolius
(Under Hesperochiron nanus)
Synonym
Hesperochiron californicus var. strigosus
(Under Hesperochiron nanus)
Synonym
Hesperochiron californicus var. watsonianus
(Under Hesperochiron nanus)
Synonym
Hesperochiron campanulatus
(Under Hesperochiron pumilus)
Synonym
Hesperochiron ciliatus
(Under Hesperochiron pumilus)
Synonym
Hesperochiron latifolius
(Under Hesperochiron nanus)
Synonym
Hesperochiron nanusCALIFORNIA HESPEROCHIRONNative
Hesperochiron pumilusNative
Hesperochiron pumilus f. fulcratus
(Under Hesperochiron pumilus)
Synonym
Hesperochiron pumilus f. hirtellus
(Under Hesperochiron pumilus)
Synonym
Hesperochiron pumilus f. nervosus
(Under Hesperochiron pumilus)
Synonym
Hesperochiron pumilus f. villosulus
(Under Hesperochiron pumilus)
Synonym
Hesperochiron pumilus var. ciliatus
(Under Hesperochiron pumilus)
Synonym
Hesperochiron pumilus var. vestitus
(Under Hesperochiron pumilus)
Synonym
Hesperochloa kingii
(Under Festuca kingii)
Synonym
HesperocnideWESTERN NETTLE
Hesperocnide tenellaNative
Hesperocyparis
  ↳  Key to Hesperocyparis
WESTERN CYPRESS
Hesperocyparis abramsianaSANTA CRUZ CYPRESSNative
Hesperocyparis abramsiana var. abramsianaNative
Hesperocyparis abramsiana var. butanoensisNative
Hesperocyparis bakeriBAKER CYPRESS, SISKIYOU CYPRESSNative
Hesperocyparis forbesiiTECATE CYPRESSNative
Hesperocyparis govenianaGOWEN CYPRESSNative
Hesperocyparis macnabianaMCNAB CYPRESSNative
Hesperocyparis macrocarpaMONTEREY CYPRESSNative
Hesperocyparis nevadensisPIUTE CYPRESSNative
Hesperocyparis pigmaeaPYGMY CYPRESSNative
Hesperocyparis revealiana
(Under Hesperocyparis stephensonii)
Synonym
Hesperocyparis sargentiiSARGENT CYPRESSNative
Hesperocyparis stephensoniiCUYAMACA CYPRESSNative
Hesperolinon
  ↳  Key to Hesperolinon
WESTERN FLAX
Hesperolinon adenophyllumGLANDULAR WESTERN FLAXNative
Hesperolinon bicarpellatumTWO-CARPELLATE WESTERN FLAXNative
Hesperolinon breweriBREWER'S WESTERN FLAXNative
Hesperolinon californicumNative
Hesperolinon clevelandiiNative
Hesperolinon congestumMARIN WESTERN FLAXNative
Hesperolinon didymocarpumLAKE COUNTY WESTERN FLAXNative
Hesperolinon disjunctumNative
Hesperolinon drymarioidesDRYMARIA-LIKE WESTERN FLAXNative
Hesperolinon micranthumNative
Hesperolinon spergulinumNative
Hesperolinon tehamenseTEHAMA COUNTY WESTERN FLAXNative
Hesperomecon
Hesperomecon filiformis
(Under Hesperomecon linearis)
Synonym
Hesperomecon linearisNative
Hesperoscordum aridum
(Under Triteleia hyacinthina)
Illegitimate name
Hesperoscordum hyacinthinum
(Under Triteleia hyacinthina)
Synonym
Hesperoscordum lacteum
(Under Triteleia hyacinthina)
Synonym
Hesperoscordum lewisii
(Under Triteleia hyacinthina)
Synonym
Hesperoscordum lilacinum
(Under Triteleia lilacina)
Synonym
Hesperoscordum maritimum
(Under Muilla maritima)
Synonym
Hesperostipa comata
(Under Stipa comata)
Synonym
Hesperostipa comata subsp. comata
(Under Stipa comata var. comata)
Synonym
Hesperostipa comata subsp. intermedia
(Under Stipa comata var. intermedia)
Synonym
HesperoyuccaQUIXOTE PLANT, CHAPARRAL YUCCA
Hesperoyucca whippleiNative
Hesperoyucca whipplei var. graminifolia
(Under Hesperoyucca whipplei)
Synonym
Heteranthemis
Heteranthemis viscidehirta
(Under Heteranthemis viscidihirta)
Orthographic variant
Heteranthemis viscidihirtaNaturalized
Heteranthera
  ↳  Key to Heteranthera
MUD PLANTAIN
Heteranthera dubiaWATER STAR-GRASSNative
Heteranthera limosaNaturalized
Heterocodon
Heterocodon rariflorumNative
Heterodraba unilateralis
(Under Athysanus unilateralis)
Synonym
Heterogaura heterandra
(Under Clarkia heterandra)
Synonym
HeteromelesCHRISTMAS BERRY, TOYON
Heteromeles arbutifoliaNative
Heteromeles arbutifolia var. arbutifolia
(Under Heteromeles arbutifolia)
Synonym
Heteromeles arbutifolia var. cerina
(Under Heteromeles arbutifolia)
Synonym
Heteromeles arbutifolia var. macrocarpa
(Under Heteromeles arbutifolia)
Synonym
Heteromeles salicifolia
(Under Heteromeles arbutifolia)
Synonym
Heteropogon
Heteropogon contortusTANGLEHEADNaturalized
Heterotheca
  ↳  Key to Heterotheca
GOLDENASTER, TELEGRAPH WEED
Heterotheca echioides var. bolanderi
(Under Heterotheca sessiliflora subsp. bolanderi)
Synonym
Heterotheca grandifloraTELEGRAPH WEEDNative
Heterotheca monarchensisMONARCH GOLDENASTERNative
Heterotheca oregonaRAYLESS GOLDENASTERNative
Heterotheca oregona var. compactaNative
Heterotheca oregona var. oregonaNative
Heterotheca oregona var. rudisNative
Heterotheca oregona var. scaberrimaNative
Heterotheca psammophila
(Under Heterotheca subaxillaris subsp. latifolia)
Synonym
Heterotheca sessilifloraSESSILEFLOWER GOLDENASTERNative
Heterotheca sessiliflora subsp. bolanderiNative
Heterotheca sessiliflora subsp. echioidesNative
Heterotheca sessiliflora subsp. fastigiataNative
Heterotheca sessiliflora subsp. sessilifloraBEACH GOLDENASTERNative
Heterotheca sessiliflora var. echioides
(Under Heterotheca sessiliflora subsp. echioides)
Synonym
Heterotheca sessiliflora var. fastigiata
(Under Heterotheca sessiliflora subsp. fastigiata)
Synonym
Heterotheca sessiliflora var. sessiliflora
(Under Heterotheca sessiliflora subsp. sessiliflora)
Synonym
Heterotheca shevockiiSHEVOCK'S GOLDENASTERNative
Heterotheca subaxillaris subsp. latifoliaCAMPHOR-WEEDNative
Heterotheca villosaHAIRY GOLDENASTERNative
Heterotheca villosa var. hispida
(Under Heterotheca villosa var. minor)
Synonym
Heterotheca villosa var. minorNative
Heterotheca villosa var. scabraNative
Heterotheca villosa var. shevockii
(Under Heterotheca shevockii)
Synonym
Heterotheca villosa var. villosa
(Under Heterotheca villosa var. minor)
Misapplied name
Heuchera
  ↳  Key to Heuchera
ALUMROOT
Heuchera abramsiiABRAMS' ALUMROOTNative
Heuchera brevistamineaLAGUNA MOUNTAINS ALUMROOTNative
Heuchera caespitosaNative
Heuchera cespitosa
(Under Heuchera caespitosa)
Orthographic variant
Heuchera cylindricaNative
Heuchera cylindrica var. alpina
(Under Heuchera cylindrica)
Synonym
Heuchera duranii
(Under Heuchera parvifolia)
Synonym
Heuchera elegans
(Under Heuchera caespitosa)
Synonym
Heuchera hirsutissimaSHAGGY-HAIRED ALUMROOTNative
Heuchera maximaISLAND ALUMROOTNative
Heuchera merriamiiNative
Heuchera micranthaNative
Heuchera micrantha var. diversifolia
(Under Heuchera micrantha)
Synonym
Heuchera micrantha var. erubescens
(Under Heuchera micrantha)
Synonym
Heuchera micrantha var. hartwegii
(Under Heuchera micrantha)
Synonym
Heuchera micrantha var. macropetala
(Under Heuchera micrantha)
Synonym
Heuchera parishiiPARISH'S ALUMROOTNative
Heuchera parvifoliaNative
Heuchera pilosissimaNative
Heuchera rubescensNative
Heuchera rubescens var. abramsii
(Under Heuchera abramsii)
Synonym
Heuchera rubescens var. alpicola
(Under Heuchera rubescens)
Synonym
Heuchera rubescens var. glandulosa
(Under Heuchera rubescens)
Synonym
Heuchera rubescens var. parishii
(Under Heuchera parishii)
Synonym
Heuchera rubescens var. rydbergiana
(Under Heuchera rubescens)
Synonym
Heuchera rubescens var. versicolor
(Under Heuchera rubescens)
Synonym
Hibiscus
  ↳  Key to Hibiscus
HIBISCUS
Hibiscus californicus
(Under Hibiscus lasiocarpos var. occidentalis)
Synonym
Hibiscus denudatusPALE FACENative
Hibiscus denundatus var. involucellatus
(Under Hibiscus denudatus)
Synonym
Hibiscus lasiocarpos var. californicus
(Under Hibiscus lasiocarpos var. occidentalis)
Synonym
Hibiscus lasiocarpos var. occidentalisWOOLLY ROSE-MALLOWNative
Hibiscus lasiocarpus
(Under Hibiscus lasiocarpos var. occidentalis)
Orthographic variant
Hibiscus moscheutos var. occidentalis
(Under Hibiscus lasiocarpos var. occidentalis)
Synonym
Hibiscus trionumFLOWER-OF-AN-HOURNaturalized
Hieracium
  ↳  Key to Hieracium
HAWKWEED
Hieracium albertinum
(Under Hieracium scouleri)
Synonym
Hieracium albiflorumWHITE HAWKWEEDNative
Hieracium argutumSOUTHERN HAWKWEEDNative
Hieracium argutum var. parishii
(Under Hieracium argutum)
Synonym
Hieracium aurantiacumORANGE HAWKWEEDWaif
Hieracium bolanderiBOLANDER'S HAWKWEEDNative
Hieracium gracile
(Under Hieracium triste)
Synonym
Hieracium greeneiGREENE'S HAWKWEEDNative
Hieracium horridumPRICKLY HAWKWEEDNative
Hieracium nudicauleNAKED-STEMMED HAWKWEEDNative
Hieracium parryiPARRY'S HAWKWEEDNative
Hieracium scouleriWESTERN HAWKWEEDNative
Hieracium scouleri var. albertinum
(Under Hieracium scouleri)
Synonym
Hieracium scouleri var. griseum
(Under Hieracium scouleri)
Synonym
Hieracium tristeSLENDER HAWKWEEDNative
Hierochloe hirta
(Under Anthoxanthum nitens subsp. nitens)
Synonym
Hierochloe occidentalis
(Under Anthoxanthum occidentale)
Synonym
Hierochloe odorata
(Under Anthoxanthum nitens subsp. nitens)
Synonym
Hilaria
  ↳  Key to Hilaria
Hilaria jamesiiGALLETANative
Hilaria rigidaBIG GALLETANative
HippurisMARE'S-TAIL
Hippuris vulgarisNative
HirschfeldiaPERENNIAL, SHORTPOD, or SUMMER MUSTARD
Hirschfeldia incanaNaturalized
Hoffmannseggia
  ↳  Key to Hoffmannseggia
Hoffmannseggia densiflora
(Under Hoffmannseggia glauca)
Synonym
Hoffmannseggia glaucaPIG-NUT, HOG POTATONative
Hoffmannseggia microphyllaNative
Hofmeisteria pluriseta
(Under Pleurocoronis pluriseta)
Synonym
Hoita
  ↳  Key to Hoita
LEATHER ROOT
Hoita hallii
(Under Rupertia hallii)
Synonym
Hoita macrostachyaNative
Hoita orbicularisNative
Hoita rigida
(Under Rupertia rigida)
Synonym
Hoita strobilinaLOMA PRIETA HOITANative
Holacantha emoryi
(Under Castela emoryi)
Synonym
Holcus
  ↳  Key to Holcus
VELVET GRASS
Holcus lanatusCOMMON VELVET GRASSNaturalized
Holcus mollisCREEPING VELVET GRASSNaturalized
Hollisteria
Hollisteria lanataFALSE SPIKEFLOWERNative
Holmgrenanthe
Holmgrenanthe petrophilaROCK LADYNative
Holmgrenia andina
(Under Neoholmgrenia andina)
Synonym
Holocarpha
  ↳  Key to Holocarpha
TARWEED, TARPLANT
Holocarpha heermanniiNative
Holocarpha macradeniaSANTA CRUZ TARPLANTNative
Holocarpha obconicaNative
Holocarpha obconica subsp. autumnalis
(Under Holocarpha obconica)
Synonym
Holocarpha virgataNative
Holocarpha virgata subsp. elongataGRACEFUL TARPLANTNative
Holocarpha virgata subsp. virgataNative
Holodiscus
Holodiscus discolor
  ↳  Key to Holodiscus discolor
OCEANSPRAYNative
Holodiscus discolor var. cedrorumNative
Holodiscus discolor var. discolorNative
Holodiscus discolor var. glabrescensNative
Holodiscus discolor var. microphyllusNative
Holodiscus dumosus var. cedrorum
(Under Holodiscus discolor var. cedrorum)
Synonym
Holodiscus microphyllus
(Under Holodiscus discolor var. microphyllus)
Synonym
Holodiscus microphyllus var. glabrescens
(Under Holodiscus discolor var. glabrescens)
Synonym
Holodiscus microphyllus var. microphyllus
(Under Holodiscus discolor var. microphyllus)
Synonym
Holodiscus saxicola
(Under Holodiscus discolor)
Synonym
HolosteumJAGGED CHICKWEED
Holosteum umbellatum subsp. umbellatumNaturalized
Holozonia
Holozonia filipesWHITECROWNNative
Hookera bicolor
(Under Triteleia grandiflora)
Synonym
Hookera bridgesii
(Under Triteleia bridgesii)
Synonym
Hookera californica
(Under Brodiaea californica)
Synonym
Hookera capitata
(Under Dipterostemon capitatus)
Synonym
Hookera congesta
(Under Dichelostemma congestum)
Synonym
Hookera crocea
(Under Triteleia crocea)
Synonym
Hookera douglasii
(Under Triteleia grandiflora)
Synonym
Hookera filifolia
(Under Brodiaea filifolia)
Synonym
Hookera gracilis
(Under Triteleia montana)
Synonym
Hookera grandiflora
(Under Triteleia grandiflora)
Synonym
Hookera howellii
(Under Triteleia grandiflora)
Synonym
Hookera hyacinthina
(Under Triteleia hyacinthina)
Synonym
Hookera hyacinthina var. lactea
(Under Triteleia hyacinthina)
Synonym
Hookera ixioides var. lugens
(Under Triteleia lugens)
Synonym
Hookera laxa
(Under Triteleia laxa)
Synonym
Hookera leptandra
(Under Brodiaea leptandra)
Synonym
Hookera macropoda
(Under Brodiaea terrestris subsp. terrestris)
Synonym
Hookera minor
(Under Brodiaea minor)
Synonym
Hookera multiflora
(Under Dichelostemma multiflorum)
Synonym
Hookera multipedunculata
(Under Brodiaea orcuttii)
Synonym
Hookera orcuttii
(Under Brodiaea orcuttii)
Synonym
Hookera parviflora
(Under Dichelostemma multiflorum)
Synonym
Hookera pauciflora
(Under Dipterostemon capitatus subsp. pauciflorus)
Synonym
Hookera peduncularis
(Under Triteleia peduncularis)
Synonym
Hookera purdyi
(Under Brodiaea minor)
Synonym
Hookera rosea
(Under Brodiaea rosea subsp. rosea)
Synonym
Hookera stellaris
(Under Brodiaea stellaris)
Synonym
Hookera synandra
(Under Brodiaea leptandra)
Synonym
Hookera volubilis
(Under Dichelostemma volubile)
Synonym
Hooveria
  ↳  Key to Hooveria
AMOLE
Hooveria parvifloraNative
Hooveria purpureaNative
Hooveria purpurea var. purpureaSANTA LUCIA PURPLE AMOLENative
Hooveria purpurea var. reductaCAMATTA CANYON AMOLENative
Hordeum
  ↳  Key to Hordeum
BARLEY
Hordeum arizonicumARIZONA BARLEYNative
Hordeum brachyantherumNative
Hordeum brachyantherum subsp. brachyantherumNORTHERN BARLEYNative
Hordeum brachyantherum subsp. californicumCALIFORNIA BARLEYNative
Hordeum californicum
(Under Hordeum brachyantherum subsp. californicum)
Synonym
Hordeum depressumLOW BARLEY, ALKALI BARLEYNative
Hordeum geniculatum
(Under Hordeum marinum subsp. gussoneanum)
Synonym
Hordeum glaucum
(Under Hordeum murinum subsp. glaucum)
Synonym
Hordeum hystrix
(Under Hordeum marinum subsp. gussoneanum)
Synonym
Hordeum intercedensBOBTAIL BARLEYNative
Hordeum jubatum subsp. jubatumFOXTAIL BARLEY, SQUIRRELTAIL BARLEYNative
Hordeum jubatum var. caespitosum
(Under Hordeum jubatum subsp. jubatum)
Synonym
Hordeum leporinum
(Under Hordeum murinum subsp. leporinum)
Synonym
Hordeum marinum subsp. gussoneanumMEDITERRANEAN BARLEYNaturalized
Hordeum murinumWALL BARLEYNaturalized
Hordeum murinum subsp. glaucumSMOOTH BARLEYNaturalized
Hordeum murinum subsp. leporinumHARE BARLEYNaturalized
Hordeum murinum subsp. murinumNaturalized
Hordeum pusillum
(Under Hordeum intercedens)
Synonym, in part
Hordeum stebbinsii
(Under Hordeum murinum subsp. glaucum)
Synonym
Hordeum vulgareBARLEYWaif
Hordeum vulgare var. trifurcatum
(Under Hordeum vulgare)
Synonym
Hordeum vulgare var. vulgare
(Under Hordeum vulgare)
Synonym
Horkelia
  ↳  Key to Horkelia
Horkelia bolanderiBOLANDER'S HORKELIANative
Horkelia bolanderi subsp. clevelandii
(Under Horkelia clevelandii var. clevelandii)
Synonym
Horkelia bolanderi subsp. parryi
(Under Horkelia rydbergii)
Synonym
Horkelia californicaNative
Horkelia californica subsp. californica
(Under Horkelia californica var. californica)
Synonym
Horkelia californica subsp. dissita
(Under Horkelia californica var. elata)
Synonym
Horkelia californica subsp. frondosa
(Under Horkelia californica var. frondosa)
Synonym
Horkelia californica var. californicaNative
Horkelia californica var. elataNative
Horkelia californica var. frondosaNative
Horkelia chaetophora
(Under Ivesia pygmaea)
Synonym
Horkelia chandleri
(Under Ivesia muirii)
Synonym
Horkelia clevelandii var. clevelandiiNative
Horkelia congesta subsp. nemorosa
(Under Horkelia congesta var. nemorosa)
Synonym
Horkelia congesta var. nemorosaJOSEPHINE HORKELIANative
Horkelia cuneataNative
Horkelia cuneata subsp. cuneata
(Under Horkelia cuneata var. cuneata)
Synonym
Horkelia cuneata subsp. puberula
(Under Horkelia cuneata var. puberula)
Synonym
Horkelia cuneata subsp. sericea
(Under Horkelia cuneata var. sericea)
Synonym
Horkelia cuneata var. cuneataNative
Horkelia cuneata var. puberulaMESA HORKELIANative
Horkelia cuneata var. sericeaKELLOGG'S HORKELIANative
Horkelia daucifoliaNative
Horkelia daucifolia subsp. daucifolia
(Under Horkelia daucifolia var. daucifolia)
Synonym
Horkelia daucifolia subsp. latior
(Under Horkelia daucifolia var. daucifolia)
Synonym
Horkelia daucifolia var. daucifoliaNative
Horkelia daucifolia var. indictaJEPSON'S HORKELIANative
Horkelia elata
(Under Horkelia californica var. elata)
Synonym
Horkelia flavescens
(Under Horkelia tridentata var. flavescens)
Synonym
Horkelia frondosa
(Under Horkelia californica var. frondosa)
Synonym
Horkelia fuscaNative
Horkelia fusca subsp. capitata
(Under Horkelia fusca var. pseudocapitata)
Misapplied name
Horkelia fusca subsp. parviflora
(Under Horkelia fusca var. parviflora)
Synonym
Horkelia fusca subsp. pseudocapitata
(Under Horkelia fusca var. brownii)
Misapplied name
Horkelia fusca subsp. pseudocapitata
(Under Horkelia fusca var. pseudocapitata)
Synonym
Horkelia fusca subsp. tenella
(Under Horkelia fusca var. tenella)
Synonym
Horkelia fusca var. browniiNative
Horkelia fusca var. parvifloraNative
Horkelia fusca var. pseudocapitataNative
Horkelia fusca var. tenellaNative
Horkelia glandulosa
(Under Horkelia californica var. elata)
Synonym
Horkelia hendersoniiHENDERSON'S HORKELIANative
Horkelia hispidulaWHITE MOUNTAINS HORKELIANative
Horkelia howelliiHOWELL'S HORKELIANative
Horkelia marinensisPOINT REYES HORKELIANative
Horkelia mollis
(Under Ivesia campestris)
Synonym
Horkelia parryiPARRY'S HORKELIANative
Horkelia rydbergiiNative
Horkelia scandularis
(Under Ivesia lycopodioides var. scandularis)
Synonym
Horkelia sericataSILKY HORKELIANative
Horkelia tenuilobaTHIN-LOBED HORKELIANative
Horkelia tridentataNative
Horkelia tridentata subsp. flavescens
(Under Horkelia tridentata var. flavescens)
Synonym
Horkelia tridentata subsp. tridentata
(Under Horkelia tridentata var. tridentata)
Synonym
Horkelia tridentata var. flavescensNative
Horkelia tridentata var. tridentataNative
Horkelia truncataRAMONA HORKELIANative
Horkelia tularensisKERN PLATEAU HORKELIANative
Horkelia wilderaeBARTON FLATS HORKELIANative
Horkelia yadoniiSANTA LUCIA HORKELIANative
Horkeliella
  ↳  Key to Horkeliella
Horkeliella congdonisNative
Horkeliella purpurascensNative
Hornungia
Hornungia procumbensNaturalized
Horsfordia
  ↳  Key to Horsfordia
Horsfordia alataPINK VELVET-MALLOWNative
Horsfordia newberryiNEWBERRY'S VELVET-MALLOWNative
Hosackia
  ↳  Key to Hosackia
LOTUS
Hosackia bicolor
(Under Hosackia pinnata)
Synonym
Hosackia crassifoliaNative
Hosackia crassifolia var. crassifoliaNative
Hosackia crassifolia var. otayensisOTAY MOUNTAIN HOSACKIANative
Hosackia cuprea
(Under Hosackia oblongifolia var. cuprea)
Synonym
Hosackia gracilisHARLEQUIN LOTUSNative
Hosackia incanaNative
Hosackia oblongifoliaNative
Hosackia oblongifolia var. cupreaCOPPER-FLOWERED BIRD'S-FOOT TREFOILNative
Hosackia oblongifolia var. oblongifoliaNative
Hosackia pinnataNative
Hosackia roseaNative
Hosackia stipularisNative
Hosackia stipularis var. ottleyiNative
Hosackia stipularis var. stipularisNative
Hosackia yollabolliensisYOLLA BOLLY MOUNTAINS BIRD'S-FOOT TREFOILNative
Howellanthus
Howellanthus dalesianusNative
Howellia
Howellia aquatilisWATER HOWELLIANative
Howellia limosa
(Under Legenere limosa)
Synonym
Hulsea
  ↳  Key to Hulsea
Hulsea algidaNative
Hulsea brevifoliaSHORTLEAVED HULSEANative
Hulsea californicaSAN DIEGO SUNFLOWERNative
Hulsea californica subsp. inyoensis
(Under Hulsea vestita subsp. inyoensis)
Synonym
Hulsea heterochromaNative
Hulsea mexicanaMEXICAN HULSEANative
Hulsea nanaLITTLE HULSEANative
Hulsea vestitaNative
Hulsea vestita subsp. callicarphaBEAUTIFUL HULSEANative
Hulsea vestita subsp. gabrielensisSAN GABRIEL MOUNTAINS SUNFLOWERNative
Hulsea vestita subsp. inyoensisINYO HULSEANative
Hulsea vestita subsp. parryiPARRY'S SUNFLOWERNative
Hulsea vestita subsp. pygmaeaPYGMY HULSEANative
Hulsea vestita subsp. vestitaNative
Hulsea vestita var. callicarpha
(Under Hulsea vestita subsp. callicarpha)
Synonym
HumulusHOP
Humulus lupulusEUROPEAN HOPNaturalized
Humulus lupulus var. lupulus
(Under Humulus lupulus)
Synonym
Humulus lupulus var. neomexicanus
(Under Humulus lupulus)
Synonym
Hutchinsia procumbens
(Under Hornungia procumbens)
Illegitimate name
Hydastylus borealis
(Under Sisyrinchium californicum)
Synonym
Hydastylus brachypus
(Under Sisyrinchium californicum)
Synonym
Hydastylus longipes
(Under Sisyrinchium longipes)
Synonym
Hydrangeaceae
  ↳  Key to Hydrangeaceae
HYDRANGEA FAMILY
Hydrilla
Hydrilla verticillataNaturalized
Hydrocharis spongia
(Under Limnobium spongia)
Synonym
Hydrocharitaceae
  ↳  Key to Hydrocharitaceae
WATERWEED FAMILY
Hydrocotyle
  ↳  Key to Hydrocotyle
MARSH PENNYWORT
Hydrocotyle ranunculoidesNative
Hydrocotyle umbellataNative
Hydrocotyle verticillataNative
Hydrocotyle verticillata var. triradiata
(Under Hydrocotyle verticillata)
Synonym
Hydrolea urens
(Under Wigandia urens)
Synonym
Hydropeltis purpurea
(Under Brasenia schreberi)
Synonym
Hydrophyllaceae
  ↳  Key to Hydrophyllaceae
WATERLEAF FAMILY
Hydrophyllum
  ↳  Key to Hydrophyllum
WATERLEAF
Hydrophyllum albifrons
(Under Hydrophyllum fendleri var. albifrons)
Synonym
Hydrophyllum albifrons subvar. pendulum
(Under Hydrophyllum fendleri var. albifrons)
Synonym
Hydrophyllum alpestreALPINE BREECHES, ALPINE WATERLEAFNative
Hydrophyllum alpinum
(Under Hydrophyllum alpestre)
Synonym
Hydrophyllum capitatum var. alpinum
(Under Hydrophyllum alpestre)
Synonym
Hydrophyllum coelestinum
(Under Hydrophyllum tenuipes)
Synonym
Hydrophyllum congestum
(Under Hydrophyllum fendleri var. albifrons)
Synonym
Hydrophyllum fendleri var. albifronsWHITE WATERLEAFNative
Hydrophyllum lineare
(Under Phacelia linearis)
Synonym
Hydrophyllum macrophyllum var. occidentale
(Under Hydrophyllum occidentale)
Synonym
Hydrophyllum occidentaleWESTERN WATERLEAFNative
Hydrophyllum occidentale var. watsonii
(Under Hydrophyllum occidentale)
Synonym
Hydrophyllum speciosum
(Under Hydrophyllum occidentale)
Synonym
Hydrophyllum tenuipesPACIFIC WATERLEAFNative
Hydrophyllum tenuipes var. viride
(Under Hydrophyllum tenuipes)
Synonym
Hydrophyllum virginicum var. pacificum
(Under Hydrophyllum tenuipes)
Synonym
Hydrophyllum viridulum
(Under Hydrophyllum tenuipes)
Synonym
Hydrophyllum watsonii
(Under Hydrophyllum occidentale)
Synonym
Hymenoclea monogyra
(Under Ambrosia monogyra)
Synonym
Hymenoclea platyspina
(Under Ambrosia ×platyspina)
Synonym
Hymenoclea salsola var. fasciculata
(Under Ambrosia salsola var. salsola)
Synonym
Hymenoclea salsola var. patula
(Under Ambrosia salsola var. salsola)
Illegitimate name
Hymenoclea salsola var. pentalepis
(Under Ambrosia salsola var. pentalepis)
Synonym
Hymenoclea salsola var. salsola
(Under Ambrosia salsola var. salsola)
Synonym
Hymenolobus procumbens
(Under Hornungia procumbens)
Synonym
Hymenopappus
Hymenopappus filifolius
  ↳  Key to Hymenopappus filifolius
Native
Hymenopappus filifolius var. eriopodusHAIRY-PODDED FINE-LEAF HYMENOPAPPUSNative
Hymenopappus filifolius var. lugensNative
Hymenopappus filifolius var. megacephalusNative
Hymenopappus filifolius var. nanusLITTLE CUTLEAFNative
Hymenothrix
  ↳  Key to Hymenothrix
Hymenothrix dissectaNative
Hymenothrix loomisiiWaif
Hymenothrix wrightiiWRIGHT'S HYMENOTHRIXNative
Hymenoxys
  ↳  Key to Hymenoxys
Hymenoxys acaulis var. arizonica
(Under Tetraneuris acaulis var. arizonica)
Synonym
Hymenoxys acaulis var. nana
(Under Tetraneuris acaulis var. arizonica)
Synonym
Hymenoxys cooperiNative
Hymenoxys cooperi var. canescens
(Under Hymenoxys cooperi)
Synonym
Hymenoxys hoopesiiNative
Hymenoxys lemmoniiALKALI HYMENOXYSNative
Hymenoxys odorataBITTER HYMENOXYSNative
Hyparrhenia
Hyparrhenia hirtaTHATCHING GRASSNaturalized
HypericaceaeST. JOHN'S WORT FAMILY
Hypericum
  ↳  Key to Hypericum
Hypericum anagalloidesTINKER'S PENNYNative
Hypericum androsaemumWaif
Hypericum calycinumAARON'S BEARDNaturalized
Hypericum canarienseNaturalized
Hypericum concinnumGOLD-WIRENative
Hypericum formosum var. scouleri
(Under Hypericum scouleri)
Synonym
Hypericum hookerianumWaif
Hypericum mutilum subsp. mutilumNaturalized
Hypericum perforatum subsp. perforatumKLAMATHWEEDNaturalized
Hypericum scouleriNative
Hypericum scouleri subsp. scouleri
(Under Hypericum scouleri)
Synonym
Hypochaeris
  ↳  Key to Hypochaeris
CAT'S-EAR
Hypochaeris glabraSMOOTH CAT'S-EARNaturalized
Hypochaeris radicataROUGH CAT'S-EARNaturalized
Hypopitys fimbriata
(Under Monotropa hypopitys)
Synonym
Hypopitys lanuginosa
(Under Monotropa hypopitys)
Synonym
Hypopitys monotropa
(Under Monotropa hypopitys)
Synonym
Hyptis emoryi
(Under Condea emoryi)
Synonym
Hystrix californica
(Under Elymus californicus)
Synonym
Iberis
Iberis umbellataGLOBE CANDYTUFTWaif
Ibicella lutea
(Under Proboscidea lutea)
Synonym
Idahoa
Idahoa scapigeraNative
IlexHOLLY
Ilex aquifoliumENGLISH HOLLYNaturalized
Iliamna
  ↳  Key to Iliamna
GLOBE MALLOW
Iliamna bakeriBAKER'S GLOBE MALLOWNative
Iliamna latibracteataCALIFORNIA GLOBE MALLOWNative
Iliamna rivularisSTREAMBANK WILD HOLLYHOCKNative
Impatiens
  ↳  Key to Impatiens
TOUCH-ME-NOT, JEWELWEED
Impatiens balfouriiKASHMIR BALSAMNaturalized
Impatiens capensisSPOTTED JEWELWEEDWaif
Impatiens glanduliferaPOLICEMAN'S HELMETNaturalized
Impatiens noli-tangere
(Under Impatiens capensis)
Misapplied name
Imperata
Imperata brevifoliaCALIFORNIA SATINTAILNative
IonactisASTER
Ionactis alpinaLAVA-ASTER, CRAG-ASTERNative
IpheionSTAR FLOWER
Ipheion uniflorumNaturalized
Ipomoea
  ↳  Key to Ipomoea
MORNING-GLORY
Ipomoea acuminata
(Under Ipomoea indica)
Synonym
Ipomoea cairicaWaif
Ipomoea hederaceaIVY MORNING-GLORYWaif
Ipomoea indicaUrban weed
Ipomoea palmata
(Under Ipomoea cairica)
Synonym
Ipomoea purpureaCOMMON MORNING-GLORYWaif
Ipomoea trilobaAgricultural weed
Ipomopsis
  ↳  Key to Ipomopsis
SCARLET GILIA
Ipomopsis aggregataNative
Ipomopsis aggregata subsp. aggregataNative
Ipomopsis aggregata subsp. arizonica
(Under Ipomopsis arizonica)
Synonym
Ipomopsis aggregata subsp. attenuata
(Under Ipomopsis tenuituba)
Misapplied name
Ipomopsis aggregata subsp. bridgesiiNative
Ipomopsis aggregata subsp. formosissima
(Under Ipomopsis aggregata subsp. aggregata)
Misapplied name
Ipomopsis arizonicaNative
Ipomopsis congestaNative
Ipomopsis congesta subsp. congestaNative
Ipomopsis congesta subsp. montanaNative
Ipomopsis congesta subsp. palmifrons
(Under Ipomopsis congesta subsp. montana)
Synonym
Ipomopsis depressa
(Under Loeseliastrum depressum)
Synonym
Ipomopsis effusaBAJA CALIFORNIA IPOMOPSISExtirpated waif
Ipomopsis polycladonNative
Ipomopsis tenuifoliaSLENDER-LEAVED IPOMOPSISNative
Ipomopsis tenuitubaNative
Iridaceae
  ↳  Key to Iridaceae
IRIS FAMILY
Iris
  ↳  Key to Iris
IRIS
Iris amabilis
(Under Iris macrosiphon)
Synonym
Iris bracteataSISKIYOU IRISNative
Iris californica
(Under Iris macrosiphon)
Synonym
Iris chrysophyllaYELLOW-FLOWERED IRISNative
Iris douglasianaNative
Iris douglasiana var. altissima
(Under Iris douglasiana)
Synonym
Iris douglasiana var. major
(Under Iris douglasiana)
Synonym
Iris douglasiana var. oregonensis
(Under Iris douglasiana)
Synonym
Iris fernaldiiNative
Iris foetidissimaCORAL IRISNaturalized
Iris germanicaNaturalized
Iris hartwegiiNative
Iris hartwegii subsp. australisNative
Iris hartwegii subsp. columbianaTUOLUMNE IRISNative
Iris hartwegii subsp. hartwegiiNative
Iris hartwegii subsp. pinetorumNative
Iris innominataDEL NORTE COUNTY IRISNative
Iris longipetalaCOAST IRISNative
Iris macrosiphonNative
Iris missouriensisWESTERN BLUE FLAGNative
Iris montana
(Under Iris missouriensis)
Synonym
Iris munziiMUNZ'S IRISNative
Iris pseudacorusNaturalized
Iris purdyiNative
Iris tenax subsp. klamathensisORLEANS IRISNative
Iris tenuissimaNative
Iris tenuissima subsp. purdyiformisNative
Iris tenuissima subsp. tenuissimaNative
Iris thompsoniiNative
Isatis
Isatis tinctoriaWOADNaturalized
Isocoma
  ↳  Key to Isocoma
GOLDENBUSH
Isocoma acradeniaALKALI GOLDENBUSHNative
Isocoma acradenia var. acradeniaNative
Isocoma acradenia var. bracteosaNative
Isocoma acradenia var. eremophilaNative
Isocoma argutaCARQUINEZ GOLDENBUSHNative
Isocoma menziesiiCOASTAL GOLDENBUSHNative
Isocoma menziesii subsp. oxyphylla
(Under Isocoma menziesii var. menziesii)
Synonym
Isocoma menziesii var. decumbensDECUMBENT GOLDENBUSHNative
Isocoma menziesii var. diabolicaSATAN'S GOLDENBUSHNative
Isocoma menziesii var. menziesiiNative
Isocoma menziesii var. sedoidesNative
Isocoma menziesii var. vernonioidesNative
IsoetaceaeQUILLWORT FAMILY
Isoetes
  ↳  Key to Isoetes
QUILLWORT
Isoetes bolanderiNative
Isoetes bolanderi var. bolanderi
(Under Isoetes bolanderi)
Synonym
Isoetes bolanderi var. pygmaea
(Under Isoetes bolanderi)
Synonym
Isoetes braunii
(Under Isoetes echinospora)
Synonym
Isoetes echinosporaNative
Isoetes howelliiNative
Isoetes lacustris var. paupercula
(Under Isoetes occidentalis)
Synonym
Isoetes muricata
(Under Isoetes echinospora)
Synonym
Isoetes nuttalliiNative
Isoetes occidentalisNative
Isoetes orcuttiiNative
Isolepis
  ↳  Key to Isolepis
Isolepis carinataNative
Isolepis cernuaNative
Isolepis koilolepis
(Under Isolepis carinata)
Synonym
Isolepis levynsianaNaturalized
Isolepis setaceaNaturalized
Isolepis tenella
(Under Isolepis levynsiana)
Illegitimate name
Isomeris arborea
(Under Cleomella arborea)
Synonym
Isomeris arborea var. angustata
(Under Cleomella arborea var. angustata)
Synonym
Isomeris arborea var. arborea
(Under Cleomella arborea var. arborea)
Synonym
Isomeris arborea var. globosa
(Under Cleomella arborea var. globosa)
Synonym
Isomeris arborea var. insularis
(Under Cleomella arborea var. globosa)
Synonym
Isopyrum occidentale
(Under Enemion occidentale)
Synonym
Isopyrum stipitatum
(Under Enemion stipitatum)
Synonym
Isotrema californicum
(Under Aristolochia californica)
Synonym
Iva
  ↳  Key to Iva
MARSH-ELDER
Iva acerosa
(Under Euphrosyne acerosa)
Synonym
Iva axillarisPOVERTY WEEDNative
Iva axillaris subsp. robustior
(Under Iva axillaris)
Synonym
Iva axillaris var. robustior
(Under Iva axillaris)
Synonym
Iva hayesianaSAN DIEGO MARSH-ELDERNative
Iva nevadensis
(Under Euphrosyne nevadensis)
Synonym
Ivesia
  ↳  Key to Ivesia
Ivesia apertaNative
Ivesia aperta var. apertaSIERRA VALLEY IVESIANative
Ivesia aperta var. caninaDOG VALLEY IVESIANative
Ivesia argyrocoma var. argyrocomaSILVER-HAIRED IVESIANative
Ivesia arizonica var. arizonicaYELLOW PURPUSIANative
Ivesia baileyiNative
Ivesia baileyi var. baileyiBAILEY'S IVESIANative
Ivesia baileyi var. beneolensOWYHEE IVESIANative
Ivesia callidaTAHQUITZ IVESIANative
Ivesia campestrisFIELD IVESIANative
Ivesia gordoniiNative
Ivesia gordonii var. alpicolaNative
Ivesia gordonii var. ursinorumNative
Ivesia jaegeriJAEGER'S IVESIANative
Ivesia kingii var. kingiiALKALI IVESIANative
Ivesia longibracteataCASTLE CRAGS IVESIANative
Ivesia lycopodioidesCLUB-MOSS IVESIANative
Ivesia lycopodioides subsp. lycopodioides
(Under Ivesia lycopodioides var. lycopodioides)
Synonym
Ivesia lycopodioides subsp. megalopetala
(Under Ivesia lycopodioides var. megalopetala)
Synonym
Ivesia lycopodioides subsp. scandularis
(Under Ivesia lycopodioides var. scandularis)
Synonym
Ivesia lycopodioides var. lycopodioidesNative
Ivesia lycopodioides var. megalopetalaNative
Ivesia lycopodioides var. scandularisNative
Ivesia muiriiNative
Ivesia paniculataASH CREEK IVESIANative
Ivesia patelliferaKINGSTON MOUNTAINS IVESIANative
Ivesia pickeringiiPICKERING'S IVESIANative
Ivesia purpurascens subsp. congdonis
(Under Horkeliella congdonis)
Synonym
Ivesia purpurascens subsp. purpurascens
(Under Horkeliella purpurascens)
Synonym
Ivesia pygmaeaNative
Ivesia santolinoidesMOUSETAIL IVESIANative
Ivesia saxosaNative
Ivesia sericoleucaPLUMAS IVESIANative
Ivesia shockleyi var. shockleyiNative
Ivesia unguiculataYOSEMITE IVESIANative
Ivesia webberiWEBBER'S IVESIANative
Ixia
Ixia maculataAFRICAN CORNLILYWaif
JacarandaJACARANDA
Jacaranda mimosifoliaBLUE JACARANDAUrban weed
Jacobaea vulgaris
(Under Senecio jacobaea)
Synonym
JamesiaCLIFFBUSH
Jamesia americana subsp. californica
(Under Jamesia americana var. rosea)
Synonym
Jamesia americana var. californica
(Under Jamesia americana var. rosea)
Synonym
Jamesia americana var. roseaROSY-PETALLED CLIFFBUSHNative
Jamesia californica
(Under Jamesia americana var. rosea)
Synonym
Jarava speciosa
(Under Stipa speciosa)
Synonym
Jaumea
Jaumea carnosaNative
Jensia
  ↳  Key to Jensia
TARWEED, TARPLANT
Jensia rammiiNative
Jensia yosemitanaYOSEMITE TARPLANTNative
Jepsonia
  ↳  Key to Jepsonia
Jepsonia heterandraFOOTHILL JEPSONIANative
Jepsonia malvifoliaISLAND JEPSONIANative
Jepsonia parryiNative
Jepsonia parryi var. heterandra
(Under Jepsonia heterandra)
Synonym
Johanneshowellia
Johanneshowellia puberulaDOWNY BUCKWHEATNative
Johnstonella
  ↳  Key to Johnstonella
Johnstonella angelicaANGELIC JOHNSTONELLANative
Johnstonella angustifoliaNARROW-LEAVED JOHNSTONELLANative
Johnstonella costataRIBBED JOHNSTONELLANative
Johnstonella holopteraWINGED JOHNSTONELLANative
Johnstonella inaequataPANAMINT JOHNSTONELLANative
Johnstonella micromeres
(Under Cryptantha micromeres)
Synonym
Johnstonella racemosaSHRUBBY JOHNSTONELLANative
Juglandaceae
  ↳  Key to Juglandaceae
WALNUT FAMILY
Juglans
  ↳  Key to Juglans
WALNUT
Juglans californicaSOUTHERN CALIFORNIA BLACK WALNUTNative
Juglans californica var. californica
(Under Juglans californica)
Synonym
Juglans californica var. hindsii
(Under Juglans hindsii)
Synonym
Juglans hindsiiNORTHERN CALIFORNIA BLACK WALNUTNative
Juglans regiaPERSIAN or ENGLISH WALNUTWaif
Juncaceae
  ↳  Key to Juncaceae
RUSH FAMILY
JuncaginaceaeARROW-GRASS FAMILY
Juncoides comosa
(Under Luzula comosa)
Synonym
Juncoides comosa var. macrantha
(Under Luzula macrantha)
Synonym
Juncoides comosa var. subsessilis
(Under Luzula subsessilis)
Synonym
Juncoides divaricata
(Under Luzula divaricata)
Synonym
Juncoides parviflora
(Under Luzula parviflora)
Synonym
Juncoides piperi
(Under Luzula piperi)
Synonym
Juncoides spicata
(Under Luzula spicata subsp. spicata)
Synonym
Juncoides subcongesta
(Under Luzula subcongesta)
Synonym
Juncoides subsessilis
(Under Luzula subsessilis)
Synonym
Juncus
  ↳  Key to Juncus
RUSH
Juncus acuminatusTAPERED RUSHNative
Juncus acutus subsp. leopoldiiSOUTHWESTERN SPINY RUSHNative
Juncus acutus var. sphaerocarpus
(Under Juncus acutus subsp. leopoldii)
Synonym
Juncus ambiguusFROG RUSHNaturalized
Juncus anthelatusKENTUCKY or POVERTY RUSHWaif
Juncus arcticus var. balticus
(Under Juncus balticus subsp. ater)
Synonym
Juncus arcticus var. mexicanus
(Under Juncus mexicanus)
Synonym
Juncus articulatus subsp. articulatusJOINTED RUSHNative
Juncus balticus subsp. aterBALTIC RUSHNative
Juncus balticus var. montanus
(Under Juncus balticus subsp. ater)
Synonym
Juncus bolanderiBOLANDER'S RUSHNative
Juncus breweriSALT or BREWER'S RUSHNative
Juncus bryoidesMOSS RUSHNative
Juncus bufoniusTOAD RUSHNative
Juncus bufonius var. bufoniusNative
Juncus bufonius var. congdonii
(Under Juncus bufonius var. bufonius)
Synonym
Juncus bufonius var. congestusCLUSTERED TOAD RUSHNaturalized
Juncus bufonius var. halophilus
(Under Juncus ambiguus)
Synonym
Juncus bufonius var. occidentalisWESTERN TOAD RUSHNative
Juncus bulbosusBULBOUS RUSHNaturalized
Juncus capillarisHAIRSTEMMED RUSHNative
Juncus capitatusDWARF RUSHNaturalized
Juncus chlorocephalusGREENHEADED RUSHNative
Juncus confususCOLORADO RUSHNative
Juncus cooperiCOOPER'S RUSHNative
Juncus covilleiCOVILLE'S RUSHNative
Juncus covillei var. covillei
(Under Juncus covillei)
Synonym
Juncus covillei var. obtusatus
(Under Juncus covillei)
Synonym
Juncus cyperoidesBOLIVIAN RUSHNaturalized
Juncus dichotomusDICHOTOMOUS RUSHNaturalized
Juncus diffusissimusSLIM-POD RUSHNaturalized
Juncus digitatusFINGER RUSHNative
Juncus drummondiiDRUMMOND'S RUSHNative
Juncus drummondii var. subtriflorus
(Under Juncus drummondii)
Synonym
Juncus dubiusMARIPOSA RUSHNative
Juncus dudleyiDUDLEY'S RUSHNative
Juncus duraniiDURAN'S RUSHNative
Juncus effususSOFT or LAMP RUSHNative
Juncus effusus subsp. austrocalifornicusSONORAN or BAJA RUSHNative
Juncus effusus subsp. effususCOMMON RUSHNaturalized
Juncus effusus subsp. pacificusPACIFIC RUSHNative
Juncus effusus subsp. solutusEASTERN SOFT RUSHNaturalized
Juncus effusus var. australis
(Under Juncus effusus subsp. austrocalifornicus)
Synonym ined.
Juncus effusus var. brunneus
(Under Juncus hesperius)
Synonym
Juncus effusus var. compactus
(Under Juncus effusus subsp. effusus)
Synonym
Juncus effusus var. exiguus
(Under Juncus exiguus)
Synonym
Juncus effusus var. gracilis
(Under Juncus laccatus)
Synonym
Juncus effusus var. pacificus
(Under Juncus effusus subsp. pacificus)
Synonym
Juncus effusus var. solutus
(Under Juncus effusus subsp. solutus)
Synonym
Juncus elliottiiELLIOTT'S RUSHNaturalized
Juncus ensifoliusDAGGER RUSH, SWORDLEAVED RUSHNative
Juncus ensifolius var. montanus
(Under Juncus saximontanus)
Synonym
Juncus exiguusKLAMATH or WEAK RUSHNative
Juncus falcatusNative
Juncus falcatus subsp. falcatusSICKLELEAVED RUSHNative
Juncus falcatus subsp. sitchensisALASKAN SICKLELEAVED RUSHNative
Juncus falcatus var. falcatus
(Under Juncus falcatus subsp. falcatus)
Synonym
Juncus falcatus var. sitchensis
(Under Juncus falcatus subsp. sitchensis)
Synonym
Juncus gerardi subsp. gerardiMUD RUSHNaturalized
Juncus glabratus
(Under Luzula piperi)
Misapplied name
Juncus hemiendytusNative
Juncus hemiendytus var. abjectusCENTER BASIN RUSHNative
Juncus hemiendytus var. hemiendytusHERMANN'S DWARF RUSHNative
Juncus hesperiusCOAST or BOG RUSHNative
Juncus howelliiHOWELL'S RUSHNative
Juncus interiorINLAND RUSHNative
Juncus interior var. arizonicus
(Under Juncus interior)
Synonym
Juncus interior var. neomexicanus
(Under Juncus interior)
Synonym
Juncus kelloggiiKELLOGG'S DWARF RUSHNative
Juncus laccatusSHINY RUSHNative
Juncus leiospermusNative
Juncus leiospermus var. ahartiiAHART'S DWARF RUSHNative
Juncus leiospermus var. leiospermusRED BLUFF DWARF RUSHNative
Juncus lescuriiSAN FRANCISCO RUSHNative
Juncus lescurii var. tracyi
(Under Juncus breweri)
Synonym
Juncus lesueurii
(Under Juncus lescurii)
Orthographic variant
Juncus longistylisLONG-STYLED RUSHNative
Juncus luciensisSANTA LUCIA DWARF RUSHNative
Juncus macrandrusLONG-ANTHERED RUSHNative
Juncus macrophyllusLONG-LEAVED RUSHNative
Juncus marginatusGRASSLEAVED or RED-ANTHERED RUSHNaturalized
Juncus marginatus var. marginatus
(Under Juncus marginatus)
Synonym
Juncus megaspermus
(Under Juncus triformis)
Synonym
Juncus melanocarpus
(Under Luzula parviflora)
Synonym
Juncus mertensianusMERTENS' RUSHNative
Juncus mertensianus subsp. gracilis
(Under Juncus nevadensis var. nevadensis)
Synonym
Juncus mertensianus var. duranii
(Under Juncus duranii)
Synonym
Juncus mexicanusMEXICAN RUSHNative
Juncus nevadensisNative
Juncus nevadensis var. inventusDUNE RUSHNative
Juncus nevadensis var. nevadensisNEVADA or SIERRAN RUSHNative
Juncus nodosusKNOTTED RUSHNative
Juncus nodosus var. nodosus
(Under Juncus nodosus)
Synonym
Juncus occidentalisWESTERN RUSHNative
Juncus oreganus
(Under Juncus supiniformis)
Synonym
Juncus orthophyllusSTRAIGHTLEAVED RUSHNative
Juncus oxymerisPOINTED RUSHNative
Juncus parryiPARRY'S RUSHNative
Juncus parviflorus
(Under Luzula parviflora)
Synonym
Juncus patensSPREADING RUSHNative
Juncus phaeocephalusNative
Juncus phaeocephalus var. gracilis
(Under Juncus nevadensis var. nevadensis)
Synonym
Juncus phaeocephalus var. paniculatusPANICLED RUSHNative
Juncus phaeocephalus var. phaeocephalusBROWNHEADED RUSHNative
Juncus planifoliusNEW ZEALAND or FLAT-LEAVED RUSHNaturalized
Juncus ranarius
(Under Juncus ambiguus)
Synonym
Juncus regeliiREGEL'S RUSHNative
Juncus rugulosusWRINKLED RUSHNative
Juncus saximontanusROCKY MOUNTAIN RUSHNative
Juncus saximontanus f. brunnescens
(Under Juncus saximontanus)
Synonym
Juncus spicatus
(Under Luzula spicata subsp. spicata)
Synonym
Juncus supiniformisHAIR-LEAVED RUSHNative
Juncus supinus
(Under Juncus bulbosus)
Synonym
Juncus tenuisPOVERTY or SLENDER RUSHNative
Juncus tenuis var. congestus
(Under Juncus occidentalis)
Synonym
Juncus tenuis var. dudleyi
(Under Juncus dudleyi)
Synonym
Juncus tenuis var. occidentalis
(Under Juncus occidentalis)
Synonym
Juncus textilisMAT or BASKET RUSHNative
Juncus tiehmiiTIEHM'S RUSHNative
Juncus torreyiTORREY'S RUSHNative
Juncus triformisYOSEMITE DWARF RUSHNative
Juncus trilocularisFOOTHILL RUSHNative
Juncus uncialisINCH-HIGH RUSHNative
Juncus usitatusAUSTRALIAN RUSHNaturalized
Juncus xiphioidesIRIS-LEAVED RUSHNative
Juniperus
  ↳  Key to Juniperus
JUNIPER
Juniperus californicaCALIFORNIA JUNIPERNative
Juniperus communisCOMMON JUNIPERNative
Juniperus communis var. depressaDEPRESSED JUNIPERNative
Juniperus communis var. jackiiJACK'S JUNIPERNative
Juniperus communis var. montana
(Under Juniperus communis var. jackii)
Synonym, in part
Juniperus communis var. montana
(Under Juniperus communis var. saxatilis)
Synonym, in part
Juniperus communis var. saxatilisMOUNTAIN JUNIPERNative
Juniperus grandisSIERRA JUNIPER, GRAND JUNIPERNative
Juniperus occidentalisWESTERN JUNIPERNative
Juniperus occidentalis var. australis
(Under Juniperus grandis)
Synonym
Juniperus occidentalis var. occidentalis
(Under Juniperus occidentalis)
Synonym
Juniperus osteospermaUTAH JUNIPERNative
Jussiaea californica
(Under Ludwigia peploides subsp. peploides)
Synonym
Jussiaea repens var. californica
(Under Ludwigia peploides subsp. peploides)
Synonym
Jussiaea repens var. montevidensis
(Under Ludwigia peploides subsp. montevidensis)
Synonym
Jussiaea repens var. peploides
(Under Ludwigia peploides subsp. peploides)
Synonym
Jussiaea uruguayensis
(Under Ludwigia grandiflora)
Synonym, in part
Jussiaea uruguayensis
(Under Ludwigia hexapetala)
Synonym, in part
Justicia
Justicia californicaBELOPERONE, CHUPAROSANative
Kali australis
(Under Salsola australis)
Synonym
Kali paulsenii
(Under Salsola paulsenii)
Synonym
Kallstroemia
  ↳  Key to Kallstroemia
Kallstroemia californicaNative
Kallstroemia grandifloraWaif
Kallstroemia parvifloraNative
Kalmia
Kalmia microphylla
(Under Kalmia polifolia)
Synonym
Kalmia microphylla var. microphylla
(Under Kalmia polifolia)
Synonym
Kalmia polifoliaSWAMP LAUREL, BOG LAURELNative
Kalmia polifolia subsp. microphylla
(Under Kalmia polifolia)
Synonym
Kalmia polifolia subsp. polifolia
(Under Kalmia polifolia)
Synonym
Keckiella
  ↳  Key to Keckiella
BUSH PENSTEMON
Keckiella antirrhinoidesNative
Keckiella antirrhinoides subsp. antirrhinoides
(Under Keckiella antirrhinoides var. antirrhinoides)
Synonym
Keckiella antirrhinoides subsp. microphylla
(Under Keckiella antirrhinoides var. microphylla)
Synonym
Keckiella antirrhinoides var. antirrhinoidesNative
Keckiella antirrhinoides var. microphyllaNative
Keckiella brevifloraNative
Keckiella breviflora subsp. breviflora
(Under Keckiella breviflora var. breviflora)
Synonym
Keckiella breviflora subsp. glabrisepala
(Under Keckiella breviflora var. glabrisepala)
Synonym
Keckiella breviflora var. brevifloraNative
Keckiella breviflora var. glabrisepalaNative
Keckiella cordifoliaNative
Keckiella corymbosaNative
Keckiella lemmoniiNative
Keckiella rothrockiiNative
Keckiella rothrockii subsp. jacintensis
(Under Keckiella rothrockii var. jacintensis)
Synonym
Keckiella rothrockii subsp. rothrockii
(Under Keckiella rothrockii var. rothrockii)
Synonym
Keckiella rothrockii var. jacintensisNative
Keckiella rothrockii var. rothrockiiNative
Keckiella ternataNative
Keckiella ternata subsp. septentrionalis
(Under Keckiella ternata var. septentrionalis)
Synonym
Keckiella ternata subsp. ternata
(Under Keckiella ternata var. ternata)
Synonym
Keckiella ternata var. septentrionalisNative
Keckiella ternata var. ternataNative
Kelloggia
Kelloggia galioidesNative
Kickxia
  ↳  Key to Kickxia
Kickxia elatineNaturalized
Kickxia spuriaNaturalized
KniphofiaRED-HOT POKER
Kniphofia uvariaNaturalized
Kobresia
Kobresia bellardii
(Under Kobresia myosuroides)
Synonym
Kobresia myosuroidesSEEP KOBRESIANative
Kochia americana
(Under Neokochia americana)
Synonym
Kochia americana var. californica
(Under Neokochia californica)
Synonym
Kochia americana var. vestita
(Under Neokochia americana)
Synonym
Kochia californica
(Under Neokochia californica)
Synonym
Kochia iranica
(Under Bassia scoparia)
Unabridged misapplied name
Kochia scoparia f. trichophylla
(Under Bassia scoparia)
Synonym
Kochia scoparia subsp. culta
(Under Bassia scoparia)
Synonym
Kochia scoparia subsp. scoparia
(Under Bassia scoparia)
Synonym
Kochia scoparia var. subvillosa
(Under Bassia scoparia)
Synonym
Kochia trichophylla
(Under Bassia scoparia)
Synonym
Kochia vestita
(Under Neokochia americana)
Synonym
KoeberliniaALL THORN
Koeberlinia spinosa subsp. tenuispina
(Under Koeberlinia spinosa var. tenuispina)
Synonym
Koeberlinia spinosa var. tenuispinaSLENDER-SPINED ALL THORNNative
KoeberliniaceaeJUNCO FAMILY
Koeleria
  ↳  Key to Koeleria
Koeleria cristata
(Under Koeleria macrantha)
Synonym, in part
Koeleria cristata var. longifolia
(Under Koeleria macrantha)
Synonym
Koeleria gerardiANNUAL JUNE GRASS, BRISTLY KOELERIANaturalized
Koeleria gracilis
(Under Koeleria macrantha)
Illegitimate name
Koeleria macranthaJUNE GRASSNative
Koeleria nitida
(Under Koeleria macrantha)
Synonym
Koeleria phleoides
(Under Koeleria gerardi)
Illegitimate name
Koeleria pyramidata
(Under Koeleria macrantha)
Misapplied name
Kohlrauschia velutina
(Under Petrorhagia dubia)
Synonym
Kopsiopsis
  ↳  Key to Kopsiopsis
GROUND-CONE
Kopsiopsis hookeriSMALL GROUND-CONENative
Kopsiopsis strobilaceaCALIFORNIA GROUND-CONENative
Krameria
  ↳  Key to Krameria
RHATANY
Krameria bicolorWHITE RHATANYNative
Krameria canescens
(Under Krameria bicolor)
Illegitimate name
Krameria erectaPIMA RHATANY, PURPLE HEATHER, LITTLE-LEAVED RHATANYNative
Krameria glandulosa
(Under Krameria erecta)
Synonym
Krameria grayi
(Under Krameria bicolor)
Synonym
Krameria parvifolia
(Under Krameria erecta)
Synonym
Krameria parvifolia var. imparata
(Under Krameria erecta)
Synonym
KrameriaceaeRHATANY FAMILY
Krascheninnikovia
Krascheninnikovia lanataWINTER FATNative
Kumlienia hystricula
(Under Ranunculus hystriculus)
Synonym
Kyhosia
Kyhosia bolanderiNative
Kyllinga
Kyllinga brevifoliaNaturalized
Lachnagrostis filiformis
(Under Agrostis avenacea)
Synonym
Lactuca
  ↳  Key to Lactuca
LETTUCE
Lactuca biennisNative
Lactuca canadensisNaturalized
Lactuca ludovicianaNaturalized
Lactuca muralis
(Under Mycelis muralis)
Synonym
Lactuca salignaNaturalized
Lactuca serriolaPRICKLY LETTUCENaturalized
Lactuca serriola var. integra
(Under Lactuca serriola)
Synonym
Lactuca tatarica subsp. pulchellaNative
Lactuca tatarica var. pulchella
(Under Lactuca tatarica subsp. pulchella)
Synonym
Lactuca virosaNaturalized
Ladeania
Ladeania lanceolataNative
Laennecia
Laennecia coulteriCOULTER'S HORSEWEEDNative
Lagophylla
  ↳  Key to Lagophylla
HARE-LEAF
Lagophylla diabolensisNative
Lagophylla dichotomaNative
Lagophylla dichotoma subsp. minor
(Under Lagophylla minor)
Synonym
Lagophylla glandulosaNative
Lagophylla glandulosa subsp. serrata
(Under Lagophylla glandulosa)
Synonym
Lagophylla minorNative
Lagophylla ramosissimaNative
Lagophylla ramosissima subsp. congesta
(Under Lagophylla ramosissima)
Synonym
Lagophylla ramosissima subsp. ramosissima
(Under Lagophylla ramosissima)
Synonym
Lagunaria
Lagunaria patersoniaNORFOLK ISLAND HIBISCUS, COW ITCH TREENaturalized
LagurusHARE'S TAIL GRASS
Lagurus ovatusNaturalized
LamarckiaGOLDENTOP
Lamarckia aureaNaturalized
Lamiaceae (Labiatae)
  ↳  Key to Lamiaceae (Labiatae)
MINT FAMILY
LamiastrumYELLOW ARCHANGEL
Lamiastrum galeobdolonWaif
Lamium
  ↳  Key to Lamium
DEAD NETTLE
Lamium amplexicauleHENBITNaturalized
Lamium galeobdolon
(Under Lamiastrum galeobdolon)
Synonym
Lamium purpureumNaturalized
LandoltiaDOTTED DUCKMEAT
Landoltia punctataNative
Langloisia
Langloisia matthewsii
(Under Loeseliastrum matthewsii)
Synonym
Langloisia punctata
(Under Langloisia setosissima subsp. punctata)
Synonym
Langloisia schottii
(Under Loeseliastrum schottii)
Synonym
Langloisia setosissima
  ↳  Key to Langloisia setosissima
Native
Langloisia setosissima subsp. punctataLILAC SUNBONNETNative
Langloisia setosissima subsp. setosissimaBRISTLY LANGLOISIANative
Lantana
  ↳  Key to Lantana
Lantana camaraWaif
Lantana montevidensisWaif
Laphamia
  ↳  Key to Laphamia
ROCK DAISY
Laphamia intricataDESERT ROCK DAISYNative
Laphamia inyoensisINYO ROCK DAISYNative
Laphamia megalocephalaNative
Laphamia megalocephala subsp. intricata
(Under Laphamia intricata)
Synonym
Laphamia megalocephala var. megalocephalaNEVADA ROCK DAISYNative
Laphamia megalocephala var. oligophyllaSMALL-LEAVED ROCK DAISYNative
Laphamia villosaHANAUPAH ROCK DAISYNative
Lappula
  ↳  Key to Lappula
Lappula echinata
(Under Lappula squarrosa)
Synonym
Lappula fremontii
(Under Lappula squarrosa)
Synonym
Lappula occidentalis
(Under Lappula redowskii)
Synonym
Lappula redowskiiNative
Lappula redowskii var. cupulataCROWNED STICKSEEDNative
Lappula redowskii var. desertorum
(Under Lappula redowskii var. cupulata)
Synonym
Lappula redowskii var. redowskiiWESTERN STICKSEEDNative
Lappula squarrosaTWO-ROWED STICKSEEDWaif
LapsanaNIPPLEWORT
Lapsana communisNaturalized
LarreaCREOSOTE BUSH
Larrea divaricata subsp. tridentata
(Under Larrea tridentata)
Synonym
Larrea tridentataNative
Larrea tridentata var. arenaria
(Under Larrea tridentata)
Synonym
LasiospermumCOCOONHEAD
Lasiospermum bipinnatumNaturalized
Lastarriaea
Lastarriaea chilensis subsp. californica
(Under Lastarriaea coriacea)
Synonym
Lastarriaea coriaceaLEATHER-SPINEFLOWERNative
Lasthenia
  ↳  Key to Lasthenia
GOLDFIELDS
Lasthenia burkeiBURKE'S GOLDFIELDSNative
Lasthenia californicaNative
Lasthenia californica subsp. bakeriBAKER'S GOLDFIELDSNative
Lasthenia californica subsp. californicaCALIFORNIA GOLDFIELDSNative
Lasthenia californica subsp. macranthaPERENNIAL GOLDFIELDSNative
Lasthenia chrysanthaALKALI-SINK GOLDFIELDSNative
Lasthenia chrysostoma
(Under Lasthenia californica subsp. californica)
Synonym
Lasthenia conjugensCONTRA COSTA GOLDFIELDSNative
Lasthenia coronariaCROWNED or ROYAL GOLDFIELDSNative
Lasthenia debilisGREENE'S GOLDFIELDSNative
Lasthenia ferrisiaeFERRIS' GOLDFIELDSNative
Lasthenia fremontiiFREMONT'S GOLDFIELDSNative
Lasthenia glaberrimaSMOOTH GOLDFIELDSNative
Lasthenia glabrataNative
Lasthenia glabrata subsp. coulteriCOULTER'S GOLDFIELDSNative
Lasthenia glabrata subsp. glabrataYELLOW-RAY GOLDFIELDSNative
Lasthenia gracilisCOMMON GOLDFIELDSNative
Lasthenia hirsutula
(Under Lasthenia californica subsp. californica)
Synonym
Lasthenia leptaleaSALINAS VALLEY GOLDFIELDSNative
Lasthenia macrantha
(Under Lasthenia californica subsp. macrantha)
Synonym
Lasthenia macrantha subsp. bakeri
(Under Lasthenia californica subsp. bakeri)
Synonym
Lasthenia maritimaMARITIME or SEASIDE GOLDFIELDSNative
Lasthenia microglossaSMALL-RAY GOLDFIELDSNative
Lasthenia minorCOASTAL GOLDFIELDSNative
Lasthenia minor subsp. maritima
(Under Lasthenia maritima)
Synonym
Lasthenia platycarphaALKALI GOLDFIELDSNative
Lastrea oregana
(Under Amauropelta nevadensis)
Synonym
Lathrocasis
Lathrocasis tenerrimaDELICATE GILIANative
Lathyrus
  ↳  Key to Lathyrus
WILD PEA
Lathyrus alefeldii
(Under Lathyrus vestitus var. alefeldii)
Synonym
Lathyrus angulatusNaturalized
Lathyrus aphacaWaif
Lathyrus biflorusTWO-FLOWERED PEANative
Lathyrus browniiNative
Lathyrus ciceraNaturalized
Lathyrus delnorticusDEL NORTE PEANative
Lathyrus glandulosusSTICKY PEANative
Lathyrus hirsutusCALEY PEANaturalized
Lathyrus hitchcockianusBULLFROG MOUNTAIN PEANative
Lathyrus japonicusSEASIDE PEANative
Lathyrus japonicus var. glaber
(Under Lathyrus japonicus)
Synonym
Lathyrus japonicus var. maritimus
(Under Lathyrus japonicus)
Synonym
Lathyrus jepsoniiNative
Lathyrus jepsonii var. californicusNative
Lathyrus jepsonii var. jepsoniiDELTA TULE PEANative
Lathyrus laetiflorus
(Under Lathyrus vestitus var. vestitus)
Synonym
Lathyrus laetiflorus subsp. alefeldii
(Under Lathyrus vestitus var. alefeldii)
Synonym
Lathyrus laetiflorus subsp. barbarae
(Under Lathyrus vestitus var. vestitus)
Synonym
Lathyrus lanszwertiiNative
Lathyrus lanszwertii var. aridusNative
Lathyrus lanszwertii var. brownii
(Under Lathyrus brownii)
Synonym
Lathyrus lanszwertii var. lanszwertiiNative
Lathyrus lanszwertii var. tracyiNative
Lathyrus latifoliusPERENNIAL SWEET PEANaturalized
Lathyrus littoralisNative
Lathyrus maritimus
(Under Lathyrus japonicus)
Synonym
Lathyrus nevadensis subsp. lanceolatus
(Under Lathyrus nevadensis var. nevadensis)
Synonym
Lathyrus nevadensis var. nevadensisNative
Lathyrus nevadensis var. pilosellus
(Under Lathyrus nevadensis var. nevadensis)
Synonym
Lathyrus odoratusSWEET PEANaturalized
Lathyrus palustrisMARSH PEANative
Lathyrus pauciflorus subsp. brownii
(Under Lathyrus brownii)
Synonym
Lathyrus pauciflorus var. brownii
(Under Lathyrus brownii)
Synonym
Lathyrus polyphyllusNative
Lathyrus rigidusRIGID PEANative
Lathyrus sphaericusNaturalized
Lathyrus splendensPRIDE-OF-CALIFORNIANative
Lathyrus sulphureusNative
Lathyrus sulphureus var. argillaceus
(Under Lathyrus sulphureus)
Synonym
Lathyrus tingitanusTANGIER PEANaturalized
Lathyrus torreyiNative
Lathyrus tracyi
(Under Lathyrus lanszwertii var. tracyi)
Synonym
Lathyrus vestitusNative
Lathyrus vestitus subsp. bolanderi
(Under Lathyrus vestitus var. ochropetalus)
Synonym, in part
Lathyrus vestitus subsp. bolanderi
(Under Lathyrus vestitus var. vestitus)
Synonym, in part
Lathyrus vestitus subsp. laetiflorus
(Under Lathyrus vestitus var. vestitus)
Synonym
Lathyrus vestitus subsp. laevicarpus
(Under Lathyrus vestitus var. vestitus)
Synonym
Lathyrus vestitus subsp. puberulus
(Under Lathyrus vestitus var. vestitus)
Synonym
Lathyrus vestitus var. alefeldiiNative
Lathyrus vestitus var. ochropetalusNative
Lathyrus vestitus var. vestitusNative
Lauraceae
  ↳  Key to Lauraceae
LAUREL FAMILY
LaurusLAUREL
Laurus nobilisBAY LAURELWaif
Lavatera
  ↳  Key to Lavatera
Lavatera arborea
(Under Malva arborea)
Synonym
Lavatera assurgentiflora
(Under Malva assurgentiflora)
Synonym
Lavatera assurgentiflora subsp. assurgentiflora
(Under Malva assurgentiflora)
Synonym
Lavatera assurgentiflora subsp. glabra
(Under Malva assurgentiflora)
Synonym
Lavatera cretica
(Under Malva multiflora)
Synonym
Lavatera olbiaTREE LAVATERANaturalized
Lavatera trimestrisANNUAL LAVATERA, ROSE MALLOWWaif
LaxmanniaceaeWIRE-LILY FAMILY
Layia
  ↳  Key to Layia
Layia carnosaBEACH LAYIANative
Layia chrysanthemoidesNative
Layia chrysanthemoides subsp. maritima
(Under Layia chrysanthemoides)
Synonym
Layia discoideaRAYLESS LAYIANative
Layia erubescensNative
Layia fremontiiNative
Layia gaillardioidesNative
Layia glandulosaWHITE LAYIANative
Layia glandulosa subsp. lutea
(Under Layia glandulosa)
Synonym
Layia heterotrichaPALE-YELLOW LAYIANative
Layia hieracioidesNative
Layia jonesiiJONES' LAYIANative
Layia leucopappaCOMANCHE POINT LAYIANative
Layia munziiMUNZ'S TIDY-TIPSNative
Layia paniculata
(Under Layia hieracioides)
Synonym
Layia pentachaetaNative
Layia pentachaeta subsp. albidaNative
Layia pentachaeta subsp. pentachaetaNative
Layia platyglossaTIDY-TIPSNative
Layia platyglossa subsp. campestris
(Under Layia platyglossa)
Synonym
Layia septentrionalisCOLUSA LAYIANative
Ledum glandulosum
(Under Rhododendron columbianum)
Synonym
LeersiaCUTGRASS
Leersia oryzoidesRICE CUTGRASSNative
Legenere
Legenere limosaLEGENERENative
Lembertia congdonii
(Under Monolopia congdonii)
Synonym
Lemmonia californica
(Under Nama californica)
Synonym
Lemna
  ↳  Key to Lemna
DUCKWEED
Lemna aequinoctialisNative
Lemna cyclostasa
(Under Lemna valdiviana)
Synonym
Lemna gibbaNative
Lemna minima
(Under Lemna minuta)
Illegitimate name
Lemna minorNative
Lemna minor var. minima
(Under Lemna minor)
Synonym
Lemna minuscula
(Under Lemna minuta)
Synonym
Lemna minutaNative
Lemna paucicostata
(Under Lemna aequinoctialis)
Synonym
Lemna trisulcaNative
Lemna turioniferaNative
Lemna valdivianaNative
Lemna valdiviana var. abbreviata
(Under Lemna valdiviana)
Synonym
Lemna valdiviana var. valdiviana
(Under Lemna valdiviana)
Synonym
LennoaceaeLENNOA FAMILY
Lens
Lens culinarisLENTILAgricultural, garden, or urban weed
Lentibulariaceae
  ↳  Key to Lentibulariaceae
BLADDERWORT FAMILY
LeontodonHAWKBIT
Leontodon leysseri
(Under Leontodon saxatilis)
Synonym
Leontodon saxatilis
  ↳  Key to Leontodon saxatilis
HAIRY HAWKBITNaturalized
Leontodon saxatilis subsp. longirostrisNaturalized
Leontodon saxatilis subsp. saxatilisNaturalized
Leontodon taraxacoides
(Under Leontodon saxatilis)
Illegitimate name
Leontodon taraxacoides
(Under Leontodon saxatilis)
Synonym
Leontodon taraxacoides subsp. longirostris
(Under Leontodon saxatilis subsp. longirostris)
Illegitimate name
Leontodon taraxacoides subsp. taraxacoides
(Under Leontodon saxatilis subsp. saxatilis)
Illegitimate name
Lepechinia
  ↳  Key to Lepechinia
PITCHER SAGE
Lepechinia calycinaNative
Lepechinia cardiophyllaHEART-LEAVED PITCHER SAGENative
Lepechinia fragransFRAGRANT PITCHER SAGENative
Lepechinia ganderiGANDER'S PITCHER SAGENative
Lepechinia rossiiROSS' PITCHER SAGENative
Lepidium
  ↳  Key to Lepidium
PEPPERGRASS, PEPPERCRESS
Lepidium acutidensNative
Lepidium appelianumWHITE-TOPNaturalized
Lepidium campestreNaturalized
Lepidium chalepenseLENS-PODDED HOARY CRESSNaturalized
Lepidium coronopusSWINE CRESSNaturalized
Lepidium densiflorumNative
Lepidium densiflorum var. bourgeauanum
(Under Lepidium ramosissimum)
Synonym
Lepidium densiflorum var. elongatum
(Under Lepidium densiflorum)
Synonym
Lepidium densiflorum var. macrocarpum
(Under Lepidium densiflorum)
Synonym
Lepidium densiflorum var. pubicarpum
(Under Lepidium densiflorum)
Synonym
Lepidium densiflorum var. ramosum
(Under Lepidium densiflorum)
Synonym
Lepidium dictyotumNative
Lepidium dictyotum var. acutidens
(Under Lepidium acutidens)
Synonym
Lepidium didymumLESSER SWINE CRESSNaturalized
Lepidium drabaHEART-PODDED HOARY CRESSNaturalized
Lepidium flavumNative
Lepidium flavum var. felipense
(Under Lepidium flavum)
Synonym
Lepidium fremontiiNative
Lepidium fremontii var. fremontii
(Under Lepidium fremontii)
Synonym
Lepidium fremontii var. stipitatum
(Under Lepidium fremontii)
Synonym
Lepidium heterophyllumNaturalized
Lepidium jarediiJARED'S PEPPERGRASSNative
Lepidium jaredii subsp. album
(Under Lepidium jaredii)
Synonym
Lepidium lasiocarpum subsp. lasiocarpumNative
Lepidium lasiocarpum var. lasiocarpum
(Under Lepidium lasiocarpum subsp. lasiocarpum)
Synonym
Lepidium latifoliumPERENNIAL PEPPERWEEDNaturalized
Lepidium latipesNative
Lepidium latipes var. heckardii
(Under Lepidium latipes)
Synonym
Lepidium latipes var. latipes
(Under Lepidium latipes)
Synonym
Lepidium montanumNative
Lepidium montanum subsp. canescens
(Under Lepidium montanum)
Synonym
Lepidium montanum subsp. cinereum
(Under Lepidium montanum)
Synonym
Lepidium montanum var. canescens
(Under Lepidium montanum)
Synonym
Lepidium montanum var. cinereum
(Under Lepidium montanum)
Synonym
Lepidium nitidumNative
Lepidium nitidum var. howellii
(Under Lepidium nitidum)
Synonym
Lepidium nitidum var. oreganum
(Under Lepidium nitidum)
Synonym
Lepidium oblongumNative
Lepidium oblongum var. insulare
(Under Lepidium oblongum)
Synonym
Lepidium oblongum var. oblongum
(Under Lepidium oblongum)
Synonym
Lepidium oxycarpumNative
Lepidium oxycarpum var. acutidens
(Under Lepidium acutidens)
Synonym
Lepidium perfoliatumNaturalized
Lepidium pinnatifidumNaturalized
Lepidium ramosissimumNative
Lepidium ramosissimum var. bourgeauanum
(Under Lepidium ramosissimum)
Synonym
Lepidium ruderale
(Under Lepidium virginicum)
Misapplied name
Lepidium squamatum
(Under Lepidium coronopus)
Synonym
Lepidium strictumNaturalized
Lepidium thurberiNative
Lepidium virginicumNative
Lepidium virginicum subsp. menziesiiNative
Lepidium virginicum subsp. virginicumNative
Lepidium virginicum var. medium
(Under Lepidium virginicum subsp. menziesii)
Synonym
Lepidium virginicum var. menziesii
(Under Lepidium virginicum subsp. menziesii)
Synonym
Lepidium virginicum var. pubescens
(Under Lepidium virginicum subsp. menziesii)
Synonym
Lepidium virginicum var. robinsonii
(Under Lepidium virginicum subsp. menziesii)
Synonym
Lepidospartum
  ↳  Key to Lepidospartum
SCALE-BROOM
Lepidospartum latisquamumNative
Lepidospartum squamatumNative
Leptochloa
  ↳  Key to Leptochloa
Leptochloa dubiaGREEN SPRANGLETOPNative
Leptochloa fascicularis
(Under Leptochloa fusca subsp. fascicularis)
Synonym
Leptochloa filiformis
(Under Leptochloa panicea subsp. brachiata)
Synonym
Leptochloa fuscaSPRANGLETOPNative
Leptochloa fusca subsp. fascicularisBEARDED SPRANGLETOPNative
Leptochloa fusca subsp. uninerviaMEXICAN SPRANGLETOPNative
Leptochloa mucronata
(Under Leptochloa panicea subsp. brachiata)
Synonym
Leptochloa panicea subsp. brachiataRED SPRANGLETOPNative
Leptochloa uninervia
(Under Leptochloa fusca subsp. uninervia)
Synonym
Leptochloa viscidaSTICKY SPRANGLETOP, SONORAN SPRANGLETOPNative
Leptodactylon californicum
(Under Linanthus californicus)
Synonym
Leptodactylon californicum subsp. brevitrichomum
(Under Linanthus californicus subsp. californicus)
Synonym
Leptodactylon californicum subsp. glandulosum
(Under Linanthus californicus subsp. glandulosus)
Synonym
Leptodactylon californicum subsp. leptotrichomum
(Under Linanthus californicus subsp. glandulosus)
Synonym
Leptodactylon californicum subsp. tomentosum
(Under Linanthus californicus subsp. tomentosus)
Synonym
Leptodactylon jaegeri
(Under Linanthus jaegeri)
Synonym
Leptodactylon pungens
(Under Linanthus pungens)
Synonym
Leptosiphon
  ↳  Key to Leptosiphon
Leptosiphon acicularis
(Under Leptosiphon aureus)
Synonym
Leptosiphon ambiguusSERPENTINE LEPTOSIPHONNative
Leptosiphon androsaceusNative
Leptosiphon aureusBRISTLY LEPTOSIPHONNative
Leptosiphon aureus (Nutt.) of various auth. non Benth.
(Under Leptosiphon chrysanthus)
Illegitimate name
Leptosiphon aureus subsp. aureus
(Under Leptosiphon chrysanthus subsp. chrysanthus)
Synonym
Leptosiphon aureus subsp. decorus
(Under Leptosiphon chrysanthus subsp. decorus)
Synonym
Leptosiphon bicolorNative
Leptosiphon bolanderiNative
Leptosiphon breviculusNative
Leptosiphon chrysanthusNative
Leptosiphon chrysanthus subsp. chrysanthusNative
Leptosiphon chrysanthus subsp. decorusNative
Leptosiphon ciliatusWHISKER BRUSHNative
Leptosiphon croceusCOAST YELLOW LEPTOSIPHONNative
Leptosiphon filipesNative
Leptosiphon floribundusNative
Leptosiphon floribundus subsp. floribundusNative
Leptosiphon floribundus subsp. glaberNative
Leptosiphon floribundus subsp. halliiSANTA ROSA MOUNTAINS LEPTOSIPHONNative
Leptosiphon grandiflorusLARGE-FLOWERED LEPTOSIPHONNative
Leptosiphon harknessiiNative
Leptosiphon jepsoniiJEPSON'S LEPTOSIPHONNative
Leptosiphon laetus
(Under Leptosiphon parviflorus)
Synonym
Leptosiphon latisectusBROAD-LOBED LEPTOSIPHONNative
Leptosiphon lemmoniiNative
Leptosiphon liniflorusNative
Leptosiphon luteolus
(Under Leptosiphon parviflorus)
Synonym
Leptosiphon luteus
(Under Leptosiphon parviflorus)
Synonym
Leptosiphon micranthus
(Under Leptosiphon parviflorus)
Synonym
Leptosiphon minimusNative
Leptosiphon montanusMUSTANG CLOVERNative
Leptosiphon nudatusNative
Leptosiphon nuttalliiNative
Leptosiphon nuttallii subsp. howelliiMOUNT TEDOC LEPTOSIPHONNative
Leptosiphon nuttallii subsp. nuttalliiNative
Leptosiphon nuttallii subsp. pubescensNative
Leptosiphon oblanceolatusSIERRA NEVADA LEPTOSIPHONNative
Leptosiphon pachyphyllusNative
Leptosiphon parviflorusNative
Leptosiphon pygmaeusNative
Leptosiphon pygmaeus subsp. continentalisNative
Leptosiphon pygmaeus subsp. pygmaeusPYGMY LEPTOSIPHONNative
Leptosiphon rattaniiRATTAN'S LEPTOSIPHONNative
Leptosiphon rosaceusROSE LEPTOSIPHONNative
Leptosiphon septentrionalisNative
Leptosiphon serrulatusMADERA LEPTOSIPHONNative
Leptospermum
Leptospermum laevigatumAUSTRALIAN TEA TREENaturalized
Leptosyne
  ↳  Key to Leptosyne
TICKSEED
Leptosyne bigeloviiNative
Leptosyne californicaNative
Leptosyne calliopsideaNative
Leptosyne douglasiiNative
Leptosyne giganteaGIANT TICKSEEDNative
Leptosyne hamiltoniiMOUNT HAMILTON TICKSEEDNative
Leptosyne maritimaSEA DAHLIANative
Leptosyne stillmaniiNative
Leptotaenia californica
(Under Lomatium californicum)
Synonym
Leptotaenia leibergi
(Under Lomatium roseanum)
Synonym
Lepturus cylindricus
(Under Hainardia cylindrica)
Synonym
Lesquerella cordiformis
(Under Physaria cordiformis)
Synonym
Lesquerella cusickii
(Under Physaria occidentalis subsp. occidentalis)
Synonym
Lesquerella kingii
(Under Physaria kingii)
Synonym
Lesquerella kingii subsp. bernardina
(Under Physaria kingii subsp. bernardina)
Synonym
Lesquerella kingii subsp. kingii
(Under Physaria kingii subsp. kingii)
Synonym
Lesquerella kingii subsp. latifolia
(Under Physaria kingii subsp. latifolia)
Synonym
Lesquerella kingii var. cordiformis
(Under Physaria cordiformis)
Synonym
Lesquerella ludoviciana
(Under Physaria ludoviciana)
Synonym
Lesquerella occidentalis subsp. occidentalis
(Under Physaria occidentalis subsp. occidentalis)
Synonym
Lesquerella tenella
(Under Physaria tenella)
Synonym
Lesquerella wardii
(Under Physaria kingii subsp. latifolia)
Synonym
Lessingia
  ↳  Key to Lessingia
Lessingia arachnoideaCRYSTAL SPRINGS LESSINGIANative
Lessingia filaginifolia var. filaginifolia
(Under Corethrogyne filaginifolia)
Synonym
Lessingia germanorumSAN FRANCISCO LESSINGIANative
Lessingia germanorum var. parvula
(Under Lessingia tenuis)
Synonym
Lessingia germanorum var. tenuis
(Under Lessingia tenuis)
Synonym
Lessingia glanduliferaNative
Lessingia glandulifera var. glanduliferaNative
Lessingia glandulifera var. glandulifera
(Under Lessingia pectinata var. tenuipes)
Misapplied name
Lessingia glandulifera var. pectinata
(Under Lessingia pectinata var. pectinata)
Synonym
Lessingia glandulifera var. peirsoniiNative
Lessingia glandulifera var. tomentosaWARNER SPRINGS LESSINGIANative
Lessingia hololeucaWOOLLY-HEADED LESSINGIANative
Lessingia hololeuca var. arachnoidea
(Under Lessingia arachnoidea)
Synonym
Lessingia lemmonii var. lemmonii
(Under Lessingia glandulifera var. glandulifera)
Synonym
Lessingia lemmonii var. peirsonii
(Under Lessingia glandulifera var. peirsonii)
Synonym
Lessingia lemmonii var. ramulosissima
(Under Lessingia glandulifera var. glandulifera)
Synonym
Lessingia leptocladaSIERRA LESSINGIANative
Lessingia micradeniaNative
Lessingia micradenia var. glabrataSMOOTH LESSINGIANative
Lessingia micradenia var. micradeniaTAMALPAIS LESSINGIANative
Lessingia nanaDWARF LESSINGIANative
Lessingia nemacladaNative
Lessingia nemaclada var. albiflora
(Under Lessingia nemaclada)
Synonym
Lessingia occidentalis
(Under Benitoa occidentalis)
Synonym
Lessingia pectinataNative
Lessingia pectinata var. pectinataNative
Lessingia pectinata var. tenuipesNative
Lessingia ramulosaNative
Lessingia tenuisSPRING LESSINGIANative
Lessingia virgataWAND LESSINGIANative
Leucanthemum
  ↳  Key to Leucanthemum
Leucanthemum lacustrePORTUGUESE DAISYNaturalized
Leucanthemum maximumSHASTA DAISYNaturalized
Leucanthemum paludosum
(Under Mauranthemum paludosum)
Synonym
Leucanthemum vulgareOX-EYE DAISYNaturalized
Leucelene ericoides
(Under Chaetopappa ericoides)
Synonym
Leucocraspedum albicaulis
(Under Frasera albicaulis)
Synonym
LeucocrinumSAND LILY
Leucocrinum montanumNative
Leucojum
Leucojum aestivumSNOWFLAKEWaif
Leucophysalis nana
(Under Chamaesaracha nana)
Synonym
Leucopoa kingii
(Under Festuca kingii)
Synonym
Leucoseris tenuifolia
(Under Malacothrix saxatilis var. tenuifolia)
Synonym
Leucosyris
  ↳  Key to Leucosyris
Leucosyris aridaSILVER LAKE DAISYNative
Leucosyris carnosaSHRUBBY ALKALI ASTERNative
Leucothoe
Leucothoe davisiaeSIERRA LAURELNative
Lewisia
  ↳  Key to Lewisia
Lewisia ×whiteaeNative
Lewisia alba
(Under Lewisia rediviva var. rediviva)
Synonym
Lewisia bernardina
(Under Lewisia nevadensis)
Synonym
Lewisia brachycalyxSHORT-SEPALED LEWISIANative
Lewisia brachycarpa
(Under Lewisia brachycalyx)
Synonym
Lewisia canteloviiCANTELOW'S LEWISIANative
Lewisia cantelowii
(Under Lewisia cantelovii)
Orthographic variant
Lewisia columbiana subsp. congdonii
(Under Lewisia congdonii)
Synonym
Lewisia congdoniiCONGDON'S LEWISIANative
Lewisia cotyledonCLIFF MAIDSNative
Lewisia cotyledon var. cotyledonNative
Lewisia cotyledon var. heckneriHECKNER'S LEWISIANative
Lewisia cotyledon var. howelliiHOWELL'S LEWISIANative
Lewisia cotyledon var. purdyi
(Under Lewisia cotyledon var. cotyledon)
Synonym
Lewisia disepalaYOSEMITE LEWISIANative
Lewisia eastwoodiana
(Under Lewisia leeana)
Synonym
Lewisia exarticulata
(Under Lewisia pygmaea)
Synonym
Lewisia finchiae
(Under Lewisia cotyledon var. cotyledon)
Synonym
Lewisia glandulosaGLANDULAR LEWISIANative
Lewisia glandulosa
(Under Lewisia glandulosa)
Illegitimate name
Lewisia heckneri
(Under Lewisia cotyledon var. heckneri)
Synonym
Lewisia howellii
(Under Lewisia cotyledon var. howellii)
Synonym
Lewisia kelloggiiKELLOGG'S LEWISIANative
Lewisia kelloggii subsp. hutchisoniiHUTCHISON'S LEWISIANative
Lewisia kelloggii subsp. kelloggiiNative
Lewisia leana
(Under Lewisia leeana)
Orthographic variant
Lewisia leeanaQUILL-LEAVED LEWISIANative
Lewisia longipetalaLONG-PETALED LEWISIANative
Lewisia minima
(Under Lewisia pygmaea)
Synonym
Lewisia minor
(Under Lewisia rediviva var. minor)
Synonym
Lewisia nevadensisNEVADA LEWISIANative
Lewisia oppositifoliaOPPOSITE-LEAVED LEWISIANative
Lewisia purdyi
(Under Lewisia cotyledon var. cotyledon)
Synonym
Lewisia pygmaeaDWARF LEWISIANative
Lewisia pygmaea subsp. glandulosa
(Under Lewisia glandulosa)
Synonym
Lewisia pygmaea subsp. longipetala
(Under Lewisia longipetala)
Synonym
Lewisia pygmaea var. aridorum
(Under Lewisia pygmaea)
Synonym
Lewisia pygmaea var. nevadensis
(Under Lewisia nevadensis)
Synonym
Lewisia pygmaea var. sierrae
(Under Lewisia pygmaea)
Synonym
Lewisia redivivaNative
Lewisia rediviva subsp. minor
(Under Lewisia rediviva var. minor)
Synonym
Lewisia rediviva var. minorSMALL BITTERROOTNative
Lewisia rediviva var. redivivaBITTERROOTNative
Lewisia rediviva var. yosemitana
(Under Lewisia disepala)
Synonym
Lewisia serrataSAW-TOOTHED LEWISIANative
Lewisia sierrae
(Under Lewisia pygmaea)
Synonym
Lewisia stebbinsiiSTEBBINS' LEWISIANative
Lewisia triphyllaTHREE-LEAVED LEWISIANative
Leymus ×multiflorus
(Under Elymus ×gouldii)
Synonym
Leymus ×vancouverensis
(Under Elymus ×vancouverensis)
Synonym
Leymus californicus
(Under Elymus californicus)
Synonym
Leymus cinereus
(Under Elymus cinereus)
Synonym
Leymus condensatus
(Under Elymus condensatus)
Synonym
Leymus mollis subsp. mollis
(Under Elymus mollis subsp. mollis)
Synonym
Leymus pacificus
(Under Elymus pacificus)
Synonym
Leymus salina subsp. mojavensis
(Under Elymus salina)
Synonym
Leymus salinus subsp. mojavensis
(Under Elymus salina)
Orthographic variant
Leymus triticoides
(Under Elymus triticoides)
Synonym
Libertia
Libertia formosaWaif
Libocedrus decurrens
(Under Calocedrus decurrens)
Synonym
Ligusticum
  ↳  Key to Ligusticum
Ligusticum apiifoliumNative
Ligusticum californicumNative
Ligusticum grayiNative
Ligustrum
  ↳  Key to Ligustrum
PRIVET
Ligustrum japonicumJAPANESE PRIVETNaturalized
Ligustrum lucidumCHINESE PRIVETNaturalized
Ligustrum ovalifoliumCALIFORNIA PRIVETNaturalized
Lilaea scilloides
(Under Triglochin scilloides)
Synonym
Lilaeopsis
  ↳  Key to Lilaeopsis
Lilaeopsis masoniiMASON'S LILAEOPSISNative
Lilaeopsis occidentalisNative
Liliaceae
  ↳  Key to Liliaceae
LILY FAMILY
Lilium
  ↳  Key to Lilium
LILY
Lilium bloomerianum var. ocellatum
(Under Lilium humboldtii subsp. ocellatum)
Synonym
Lilium bolanderiBOLANDER'S LILYNative
Lilium canadense var. parviflorum
(Under Lilium columbianum)
Synonym
Lilium canadense var. parvum
(Under Lilium parvum)
Synonym
Lilium columbianumCOLUMBIA LILYNative
Lilium fairchildii
(Under Lilium humboldtii subsp. ocellatum)
Synonym
Lilium fresnense
(Under Lilium kelleyanum)
Synonym
Lilium harrisianum
(Under Lilium pardalinum subsp. pardalinum)
Synonym
Lilium howellii
(Under Lilium bolanderi)
Synonym
Lilium humboldtiiNative
Lilium humboldtii subsp. humboldtiiHUMBOLDT LILYNative
Lilium humboldtii subsp. ocellatumOCELLATED HUMBOLDT LILYNative
Lilium humboldtii var. bloomerianum
(Under Lilium humboldtii subsp. ocellatum)
Synonym
Lilium humboldtii var. magnificum
(Under Lilium humboldtii subsp. ocellatum)
Synonym
Lilium humboldtii var. ocellatum
(Under Lilium humboldtii subsp. ocellatum)
Synonym
Lilium inyoense
(Under Lilium kelleyanum)
Synonym
Lilium kelleyanumKELLEY'S LILYNative
Lilium kelloggiiKELLOGG'S LILYNative
Lilium lucidum
(Under Lilium columbianum)
Synonym
Lilium maritimumCOAST LILYNative
Lilium nevadense
(Under Lilium pardalinum subsp. shastense)
Synonym
Lilium nevadense var. fresnense
(Under Lilium kelleyanum)
Synonym
Lilium nevadense var. monense
(Under Lilium kelleyanum)
Synonym
Lilium nevadense var. shastense
(Under Lilium pardalinum subsp. shastense)
Synonym
Lilium occidentaleWESTERN LILYNative
Lilium ocellatum
(Under Lilium humboldtii subsp. ocellatum)
Synonym
Lilium pardalinumNative
Lilium pardalinum subsp. pardalinumLEOPARD LILYNative
Lilium pardalinum subsp. pitkinensePITKIN MARSH LILYNative
Lilium pardalinum subsp. shastenseSHASTA LILYNative
Lilium pardalinum subsp. vollmeriVOLLMER'S LILYNative
Lilium pardalinum subsp. wigginsiiWIGGINS' LILYNative
Lilium pardalinum var. angustifolium
(Under Lilium pardalinum subsp. pardalinum)
Synonym
Lilium pardalinum var. parviflorum
(Under Lilium kelleyanum)
Synonym
Lilium parryiLEMON LILYNative
Lilium parryi var. kessleri
(Under Lilium parryi)
Synonym
Lilium parviflorum
(Under Lilium columbianum)
Synonym
Lilium parviflorum var. luteum
(Under Lilium pardalinum subsp. shastense)
Synonym
Lilium parvumALPINE LILY, SIERRA TIGER LILYNative
Lilium parvum var. crocatum
(Under Lilium parvum)
Synonym
Lilium parvum var. luteum
(Under Lilium pardalinum subsp. shastense)
Synonym
Lilium pitkinense
(Under Lilium pardalinum subsp. pitkinense)
Synonym
Lilium purpureum
(Under Lilium washingtonianum subsp. purpurascens)
Synonym
Lilium roezlii
(Under Lilium pardalinum subsp. pardalinum)
Synonym
Lilium rubescensREDWOOD LILYNative
Lilium shastense
(Under Lilium pardalinum subsp. shastense)
Synonym
Lilium vollmeri
(Under Lilium pardalinum subsp. vollmeri)
Synonym
Lilium washingtonianumWASHINGTON LILYNative
Lilium washingtonianum subsp. purpurascensPURPLE-FLOWERED WASHINGTON LILYNative
Lilium washingtonianum subsp. washingtonianumNative
Lilium washingtonianum var. minor
(Under Lilium washingtonianum subsp. washingtonianum)
Synonym
Lilium washingtonianum var. purpurascens
(Under Lilium washingtonianum subsp. purpurascens)
Synonym
Lilium washingtonianum var. purpureum
(Under Lilium rubescens)
Synonym
Lilium washingtonianum var. purpureum
(Under Lilium washingtonianum subsp. purpurascens)
Illegitimate name
Lilium wigginsii
(Under Lilium pardalinum subsp. wigginsii)
Synonym
Limnanthaceae
  ↳  Key to Limnanthaceae
MEADOWFOAM FAMILY
Limnanthes
  ↳  Key to Limnanthes
MEADOWFOAM
Limnanthes albaNative
Limnanthes alba subsp. albaNative
Limnanthes alba subsp. parishiiNative
Limnanthes alba subsp. versicolorNative
Limnanthes bakeriBAKER'S MEADOWFOAMNative
Limnanthes douglasiiNative
Limnanthes douglasii subsp. douglasiiNative
Limnanthes douglasii subsp. niveaNative
Limnanthes douglasii subsp. roseaNative
Limnanthes douglasii subsp. striataNative
Limnanthes douglasii subsp. sulphureaPOINT REYES MEADOWFOAMNative
Limnanthes floccosaNative
Limnanthes floccosa subsp. bellingerianaBELLINGER'S MEADOWFOAMNative
Limnanthes floccosa subsp. californicaBUTTE COUNTY MEADOWFOAMNative
Limnanthes floccosa subsp. floccosaWOOLLY MEADOWFOAMNative
Limnanthes gracilis subsp. parishii
(Under Limnanthes alba subsp. parishii)
Synonym
Limnanthes montanaNative
Limnanthes striata
(Under Limnanthes douglasii subsp. striata)
Synonym
Limnanthes versicolor var. parishii
(Under Limnanthes alba subsp. parishii)
Synonym
Limnanthes vinculansSEBASTOPOL MEADOWFOAMNative
LimnobiumFROGBIT
Limnobium laevigatum
(Under Limnobium spongia)
Misapplied name
Limnobium spongiaAMERICAN FROGBITNaturalized
Limonium
  ↳  Key to Limonium
SEA-LAVENDER, MARSH-ROSEMARY
Limonium brassicifoliumWaif
Limonium californicumWESTERN MARSH-ROSEMARYNative
Limonium californicum var. mexicanum
(Under Limonium californicum)
Synonym
Limonium duriusculumNaturalized
Limonium otolepisWaif
Limonium pereziiNaturalized
Limonium perfoliatum
(Under Limonium otolepis)
Unabridged misapplied name
Limonium preauxiiWaif
Limonium ramosissimumNaturalized
Limonium sinuatumNaturalized
Limonium sventeniiWaif
Limosella
  ↳  Key to Limosella
MUDWORT
Limosella acaulisNative
Limosella aquaticaNative
Limosella australisDELTA MUDWORTNaturalized
Limosella subulata
(Under Limosella australis)
Synonym
Linaceae
  ↳  Key to Linaceae
FLAX FAMILY
Linanthastrum nuttallii subsp. pubescens
(Under Leptosiphon nuttallii subsp. pubescens)
Synonym
Linanthastrum pachyphyllum
(Under Leptosiphon pachyphyllus)
Synonym
Linanthus
  ↳  Key to Linanthus
Linanthus acicularis
(Under Leptosiphon aureus)
Synonym
Linanthus ambiguus
(Under Leptosiphon ambiguus)
Synonym
Linanthus androsaceus
(Under Leptosiphon androsaceus)
Synonym
Linanthus androsaceus subsp. laetus
(Under Leptosiphon parviflorus)
Synonym
Linanthus arenicolaSAND LINANTHUSNative
Linanthus aureus subsp. aureus
(Under Leptosiphon chrysanthus subsp. chrysanthus)
Synonym
Linanthus aureus subsp. decorus
(Under Leptosiphon chrysanthus subsp. decorus)
Synonym
Linanthus bakeri
(Under Leptosiphon bolanderi)
Synonym
Linanthus bellusDESERT BEAUTYNative
Linanthus bernardinusPIONEERTOWN LINANTHUSNative
Linanthus bicolor
(Under Leptosiphon bicolor)
Synonym
Linanthus bicolor subsp. minimus
(Under Leptosiphon minimus)
Synonym
Linanthus bigelovii subsp. johnsoniiNative
Linanthus bolanderi
(Under Leptosiphon bolanderi)
Synonym
Linanthus breviculus
(Under Leptosiphon breviculus)
Synonym
Linanthus californicusPRICKLY PHLOXNative
Linanthus californicus subsp. californicusNative
Linanthus californicus subsp. glandulosusNative
Linanthus californicus subsp. tomentosusNative
Linanthus campanulatusNative
Linanthus ciliatus
(Under Leptosiphon ciliatus)
Synonym
Linanthus ciliatus var. montanus
(Under Leptosiphon montanus)
Synonym
Linanthus concinnusSAN GABRIEL LINANTHUSNative
Linanthus croceus
(Under Leptosiphon croceus)
Synonym
Linanthus demissusNative
Linanthus dianthiflorusNative
Linanthus dianthiflorus subsp. farinosus
(Under Linanthus dianthiflorus)
Synonym
Linanthus dichotomusNative
Linanthus dichotomus subsp. dichotomusEVENING SNOWNative
Linanthus dichotomus subsp. meridianusNative
Linanthus dichotomus subsp. pattersoniiNative
Linanthus filiformisNative
Linanthus filipes
(Under Leptosiphon filipes)
Synonym
Linanthus floribundus subsp. floribundus
(Under Leptosiphon floribundus subsp. floribundus)
Synonym
Linanthus floribundus subsp. glaber
(Under Leptosiphon floribundus subsp. glaber)
Synonym
Linanthus floribundus subsp. hallii
(Under Leptosiphon floribundus subsp. hallii)
Synonym
Linanthus grandiflorus
(Under Leptosiphon grandiflorus)
Synonym
Linanthus harknessii
(Under Leptosiphon harknessii)
Synonym
Linanthus harknessii subsp. condensatus
(Under Leptosiphon harknessii)
Synonym
Linanthus inyoensisNative
Linanthus jaegeriSAN JACINTO LINANTHUSNative
Linanthus jepsonii
(Under Leptosiphon jepsonii)
Synonym
Linanthus jonesiiNative
Linanthus killipiiBALDWIN LAKE LINANTHUSNative
Linanthus latisectus
(Under Leptosiphon latisectus)
Synonym
Linanthus lemmonii
(Under Leptosiphon lemmonii)
Synonym
Linanthus liniflorus
(Under Leptosiphon liniflorus)
Synonym
Linanthus liniflorus subsp. pharnaceoides
(Under Leptosiphon liniflorus)
Synonym
Linanthus maculatusLITTLE SAN BERNARDINO MOUNTAINS LINANTHUSNative
Linanthus maculatus subsp. emaculatusNative
Linanthus maculatus subsp. maculatusNative
Linanthus montanus
(Under Leptosiphon montanus)
Synonym
Linanthus nudatus
(Under Leptosiphon nudatus)
Synonym
Linanthus nuttallii subsp. floribundus
(Under Leptosiphon floribundus subsp. floribundus)
Synonym
Linanthus nuttallii subsp. howellii
(Under Leptosiphon nuttallii subsp. howellii)
Synonym
Linanthus nuttallii subsp. nuttallii
(Under Leptosiphon nuttallii subsp. nuttallii)
Synonym
Linanthus nuttallii subsp. pubescens
(Under Leptosiphon nuttallii subsp. pubescens)
Synonym
Linanthus oblanceolatus
(Under Leptosiphon oblanceolatus)
Synonym
Linanthus orcuttiiORCUTT'S LINANTHUSNative
Linanthus pachyphyllus
(Under Leptosiphon pachyphyllus)
Synonym
Linanthus parryaeNative
Linanthus parviflorus
(Under Leptosiphon parviflorus)
Synonym
Linanthus parviflorus var. rosaceus
(Under Leptosiphon rosaceus)
Synonym
Linanthus plaskettii
(Under Leptosiphon parviflorus)
Synonym
Linanthus pungensGRANITE GILIANative
Linanthus pungens subsp. halliiNative
Linanthus pungens subsp. pulchriflorusNative
Linanthus pygmaeus subsp. continentalis
(Under Leptosiphon pygmaeus subsp. continentalis)
Synonym
Linanthus pygmaeus subsp. pygmaeus
(Under Leptosiphon pygmaeus subsp. pygmaeus)
Synonym
Linanthus rattanii
(Under Leptosiphon rattanii)
Synonym
Linanthus rosaceus
(Under Leptosiphon rosaceus)
Synonym
Linanthus septentrionalis
(Under Leptosiphon septentrionalis)
Synonym
Linanthus serrulatus
(Under Leptosiphon serrulatus)
Synonym
Linaria
  ↳  Key to Linaria
TOADFLAX
Linaria bipartitaNaturalized
Linaria canadensis
(Under Nuttallanthus texanus)
Misapplied name, in part
Linaria canadensis var. texana
(Under Nuttallanthus texanus)
Synonym
Linaria dalmatica subsp. dalmaticaDALMATIAN TOADFLAXNaturalized
Linaria genistifolia subsp. dalmatica
(Under Linaria dalmatica subsp. dalmatica)
Synonym
Linaria maroccanaNaturalized
Linaria pinifoliaNaturalized
Linaria purpureaWaif
Linaria reticulata
(Under Linaria pinifolia)
Synonym
Linaria vulgarisBUTTER-AND-EGGSNaturalized
LinderniaFALSE PIMPERNEL
Lindernia dubiaNative
Lindernia dubia var. anagallidea
(Under Lindernia dubia)
Synonym
Lindernia dubia var. dubia
(Under Lindernia dubia)
Synonym
LinderniaceaeFALSE-PIMPERNEL FAMILY
LinnaeaTWIN FLOWER
Linnaea borealis subsp. americana
(Under Linnaea borealis var. longiflora)
Synonym
Linnaea borealis var. longifloraNative
LinnaeaceaeTWIN FLOWER FAMILY
Linum
  ↳  Key to Linum
FLAX
Linum angustifolium
(Under Linum bienne)
Synonym
Linum bienneNaturalized
Linum clevelandii
(Under Hesperolinon clevelandii)
Synonym
Linum congestum
(Under Hesperolinon congestum)
Synonym
Linum drymarioides
(Under Hesperolinon drymarioides)
Synonym
Linum gallicum
(Under Linum trigynum)
Illegitimate name
Linum grandiflorumNaturalized
Linum lewisii var. alpicola
(Under Linum lewisii var. lewisii)
Synonym
Linum lewisii var. lewisiiNative
Linum micranthum
(Under Hesperolinon micranthum)
Synonym
Linum perenne subsp. lewisii
(Under Linum lewisii var. lewisii)
Synonym
Linum puberulumPLAINS FLAXNative
Linum spergulinum
(Under Hesperolinon spergulinum)
Synonym
Linum trigynumNaturalized
Linum usitatissimumNaturalized
Lipocarpha
  ↳  Key to Lipocarpha
Lipocarpha aristulataNative
Lipocarpha micranthaNative
Lipocarpha occidentalisNative
Lippia lanceolata
(Under Phyla lanceolata)
Synonym
Lippia wrightii
(Under Aloysia wrightii)
Synonym
Listera
  ↳  Key to Listera
TWAYBLADE
Listera banksianaNORTHWEST TWAYBLADENative
Listera caurina
(Under Listera banksiana)
Synonym
Listera convallarioidesBROAD-LEAVED TWAYBLADENative
Listera cordataHEART-LEAVED TWAYBLADENative
Listera cordata var. cordata
(Under Listera cordata)
Synonym
Listera cordata var. nephrophylla
(Under Listera cordata)
Synonym
Listera nephrophylla
(Under Listera cordata)
Synonym
Listera retusa
(Under Listera banksiana)
Synonym
Lithocarpus densiflorus
(Under Notholithocarpus densiflorus)
Synonym
Lithocarpus densiflorus var. densiflorus
(Under Notholithocarpus densiflorus var. densiflorus)
Synonym
Lithocarpus densiflorus var. echinoides
(Under Notholithocarpus densiflorus var. echinoides)
Synonym
Lithophragma
  ↳  Key to Lithophragma
WOODLAND STAR
Lithophragma affineNative
Lithophragma affine subsp. mixtum
(Under Lithophragma affine)
Synonym
Lithophragma bolanderiNative
Lithophragma breviloba
(Under Lithophragma tenellum)
Synonym
Lithophragma bulbiferum
(Under Lithophragma glabrum)
Synonym
Lithophragma campanulatumNative
Lithophragma cymbalariaNative
Lithophragma glabrumNative
Lithophragma heterophyllumNative
Lithophragma maximumSAN CLEMENTE ISLAND WOODLAND STARNative
Lithophragma parviflorumNative
Lithophragma parviflorum var. parviflorumNative
Lithophragma parviflorum var. trifoliatumNative
Lithophragma rupicola
(Under Lithophragma tenellum)
Synonym
Lithophragma scabrella
(Under Lithophragma bolanderi)
Synonym
Lithophragma tenellumNative
Lithophragma trifoliatum
(Under Lithophragma parviflorum var. trifoliatum)
Synonym
Lithophragma tripartitum
(Under Lithophragma affine)
Synonym
Lithospermum
  ↳  Key to Lithospermum
STONESEED
Lithospermum arvenseGROMWELLNaturalized
Lithospermum californicumCALIFORNIA STONESEEDNative
Lithospermum incisumPLAINS STONESEEDNative
Lithospermum ruderaleWESTERN STONESEEDNative
Loasaceae
  ↳  Key to Loasaceae
LOASA FAMILY
Lobelia
  ↳  Key to Lobelia
Lobelia cardinalis var. pseudosplendensCARDINAL FLOWERNative
Lobelia dunnii var. serrataNative
Lobelia erinusWaif
LobulariaSWEET ALYSSUM
Lobularia maritimaNaturalized
Loeflingia
Loeflingia pusilla
(Under Loeflingia squarrosa)
Synonym
Loeflingia squarrosaSPREADING PYGMYLEAFNative
Loeflingia squarrosa subsp. artemisiarum
(Under Loeflingia squarrosa)
Synonym
Loeflingia squarrosa subsp. squarosa
(Under Loeflingia squarrosa)
Synonym
Loeflingia squarrosa var. artemisiarum
(Under Loeflingia squarrosa)
Synonym
Loeflingia squarrosa var. squarrosa
(Under Loeflingia squarrosa)
Synonym
Loeselia tenuifolia
(Under Ipomopsis tenuifolia)
Synonym
Loeseliastrum
  ↳  Key to Loeseliastrum
Loeseliastrum depressumDEPRESSED STANDING-CYPRESSNative
Loeseliastrum matthewsiiDESERT CALICONative
Loeseliastrum schottiiNative
Logfia
  ↳  Key to Logfia
Logfia arizonicaARIZONA COTTONROSENative
Logfia depressaHIERBA LIMPIANative
Logfia filaginoidesCALIFORNIA COTTONROSENative
Logfia gallicaDAGGERLEAF COTTONROSENaturalized
Lolium arundinaceum
(Under Festuca arundinacea)
Synonym
Lolium multiflorum
(Under Festuca perennis)
Synonym
Lolium perenne
(Under Festuca perennis)
Synonym
Lolium perenne var. multiflorum
(Under Festuca perennis)
Synonym
Lolium pratense
(Under Festuca pratensis)
Synonym
Lolium strictum
(Under Festuca perennis)
Synonym
Lolium temulentum
(Under Festuca temulenta)
Synonym
Lomatium
  ↳  Key to Lomatium
Lomatium alatum
(Under Lomatium triternatum var. macrocarpum)
Synonym
Lomatium austiniaeNative
Lomatium bicolor var. leptocarpumNative
Lomatium californicumNative
Lomatium canbyiCANBY'S LOMATIUMNative
Lomatium caruifoliumNative
Lomatium caruifolium var. caruifoliumNative
Lomatium caruifolium var. denticulatumNative
Lomatium ciliolatumNative
Lomatium ciliolatum var. hooveri
(Under Lomatium hooveri)
Synonym
Lomatium congdoniiCONGDON'S LOMATIUMNative
Lomatium dasycarpumNative
Lomatium dasycarpum subsp. dasycarpumNative
Lomatium dasycarpum subsp. tomentosumNative
Lomatium dissectumNative
Lomatium dissectum var. multifidum
(Under Lomatium multifidum)
Synonym
Lomatium engelmanniiENGELMANN'S LOMATIUMNative
Lomatium foeniculaceumNative
Lomatium foeniculaceum subsp. fimbriatumNative
Lomatium foeniculaceum subsp. inyoenseINYO LOMATIUMNative
Lomatium foeniculaceum subsp. macdougaliiMACDOUGAL'S LOMATIUMNative
Lomatium foeniculaceum var. macdougalii
(Under Lomatium foeniculaceum subsp. macdougalii)
Synonym
Lomatium fusiformisNative
Lomatium giganteum
(Under Lomatium triternatum var. macrocarpum)
Synonym
Lomatium grayiGRAY'S LOMATIUMNative
Lomatium halliiNative
Lomatium hendersoniiHENDERSON'S LOMATIUMNative
Lomatium hooveriHOOVER'S LOMATIUMNative
Lomatium howelliiHOWELL'S LOMATIUMNative
Lomatium humile
(Under Lomatium caruifolium var. denticulatum)
Synonym
Lomatium insulareSAN NICOLAS ISLAND LOMATIUMNative
Lomatium inyoense
(Under Lomatium foeniculaceum subsp. inyoense)
Synonym
Lomatium kogholiiniWAILAKI LOMATIUMNative
Lomatium leptocarpum
(Under Lomatium bicolor var. leptocarpum)
Synonym
Lomatium lucidumNative
Lomatium lucidum var. repostum
(Under Lomatium repostum)
Synonym
Lomatium macrocarpumNative
Lomatium macrocarpum var. ellipticum
(Under Lomatium macrocarpum)
Synonym
Lomatium marginatumNative
Lomatium marginatum var. marginatumNative
Lomatium marginatum var. purpureumNative
Lomatium martindaleiCOAST RANGE LOMATIUMNative
Lomatium microcarpum
(Under Lomatium hallii)
Synonym
Lomatium mohavenseNative
Lomatium multifidumNative
Lomatium nelsonianum
(Under Lomatium hallii)
Unabridged synonym, in part
Lomatium nevadenseNative
Lomatium nevadense var. holopterum
(Under Lomatium nevadense var. parishii)
Synonym
Lomatium nevadense var. nevadenseNative
Lomatium nevadense var. parishiiNative
Lomatium nevadense var. pseudorientale
(Under Lomatium nevadense var. parishii)
Synonym
Lomatium nudicauleNative
Lomatium nudicaule var. puberulum
(Under Lomatium triternatum var. triternatum)
Synonym
Lomatium observatoriumMOUNT HAMILTON LOMATIUMNative
Lomatium parryiNative
Lomatium parvifoliumSMALL-LEAVED LOMATIUMNative
Lomatium parvifolium var. pallidum
(Under Lomatium parvifolium)
Synonym
Lomatium peckianumPECK'S LOMATIUMNative
Lomatium piperiNative
Lomatium plummerae
(Under Lomatium austiniae)
Synonym
Lomatium plummerae var. austiniae
(Under Lomatium austiniae)
Synonym
Lomatium plummerae var. sonnei
(Under Lomatium austiniae)
Synonym
Lomatium raveniiRAVEN'S LOMATIUMNative
Lomatium ravenii var. paiutenseNative
Lomatium ravenii var. raveniiNative
Lomatium repostumNAPA LOMATIUMNative
Lomatium rigidumSTIFF LOMATIUMNative
Lomatium roseanumADOBE LOMATIUMNative
Lomatium shevockiiOWENS PEAK LOMATIUMNative
Lomatium stebbinsiiSTEBBINS' LOMATIUMNative
Lomatium tomentosum
(Under Lomatium dasycarpum subsp. tomentosum)
Synonym
Lomatium torreyiNative
Lomatium tracyiTRACY'S LOMATIUMNative
Lomatium triternatumNative
Lomatium triternatum var. macrocarpumNative
Lomatium triternatum var. triternatumNative
Lomatium utriculatumNative
Lomatium vaginatumNative
Lomatium vaseyi
(Under Lomatium utriculatum)
Synonym
Lonicera
  ↳  Key to Lonicera
HONEYSUCKLE
Lonicera caerulea var. cauriana
(Under Lonicera cauriana)
Synonym
Lonicera caurianaNative
Lonicera ciliosaORANGE HONEYSUCKLENative
Lonicera conjugialisNative
Lonicera etruscaWaif
Lonicera hispidulaNative
Lonicera hispidula var. californica
(Under Lonicera hispidula)
Superfluous name
Lonicera hispidula var. hispidula
(Under Lonicera hispidula)
Synonym
Lonicera hispidula var. vacillans
(Under Lonicera hispidula)
Synonym
Lonicera interruptaNative
Lonicera involucrataTWINBERRYNative
Lonicera involucrata var. involucrataNative
Lonicera involucrata var. ledebouriiNative
Lonicera japonicaJAPANESE HONEYSUCKLENaturalized
Lonicera subspicataNative
Lonicera subspicata var. denudataNative
Lonicera subspicata var. johnstonii
(Under Lonicera subspicata var. denudata)
Synonym
Lonicera subspicata var. subspicataSANTA BARBARA HONEYSUCKLENative
Lonicera tataricaNaturalized
Lophochloa cristata
(Under Koeleria gerardi)
Synonym
Lorandersonia peirsonii
(Under Tonestus peirsonii)
Synonym
Lotus
  ↳  Key to Lotus
Lotus aboriginus
(Under Hosackia rosea)
Synonym
Lotus angustissimusNaturalized
Lotus argophyllus
(Under Acmispon argophyllus)
Synonym
Lotus argophyllus subsp. adsurgens
(Under Acmispon argophyllus var. adsurgens)
Synonym
Lotus argophyllus subsp. niveus
(Under Acmispon argophyllus var. niveus)
Synonym
Lotus argophyllus var. adsurgens
(Under Acmispon argophyllus var. adsurgens)
Synonym
Lotus argophyllus var. argenteus
(Under Acmispon argophyllus var. argenteus)
Synonym
Lotus argophyllus var. argophyllus
(Under Acmispon argophyllus var. argophyllus)
Synonym
Lotus argophyllus var. decorus
(Under Acmispon argophyllus var. argophyllus)
Synonym
Lotus argophyllus var. fremontii
(Under Acmispon argophyllus var. fremontii)
Synonym
Lotus argophyllus var. niveus
(Under Acmispon argophyllus var. niveus)
Synonym
Lotus argophyllus var. ornithopus
(Under Acmispon argophyllus var. argenteus)
Synonym, in part
Lotus argyraeus
(Under Acmispon argyraeus)
Synonym
Lotus argyraeus subsp. argyraeus
(Under Acmispon argyraeus var. argyraeus)
Synonym
Lotus argyraeus subsp. multicaulis
(Under Acmispon argyraeus var. multicaulis)
Synonym
Lotus argyraeus var. argyraeus
(Under Acmispon argyraeus var. argyraeus)
Synonym
Lotus argyraeus var. multicaulis
(Under Acmispon argyraeus var. multicaulis)
Synonym
Lotus argyraeus var. notitius
(Under Acmispon argyraeus var. notitius)
Synonym
Lotus benthamii
(Under Acmispon cytisoides)
Synonym
Lotus corniculatusBIRD'S-FOOT TREFOILNaturalized
Lotus crassifolius var. crassifolius
(Under Hosackia crassifolia var. crassifolia)
Synonym
Lotus crassifolius var. otayensis
(Under Hosackia crassifolia var. otayensis)
Synonym
Lotus cupreus
(Under Hosackia oblongifolia var. cuprea)
Synonym
Lotus davidsonii
(Under Acmispon decumbens var. davidsonii)
Synonym
Lotus dendroideus
(Under Acmispon dendroideus)
Synonym
Lotus dendroideus var. dendroideus
(Under Acmispon dendroideus var. dendroideus)
Synonym
Lotus dendroideus var. traskiae
(Under Acmispon dendroideus var. traskiae)
Synonym
Lotus dendroideus var. veatchii
(Under Acmispon dendroideus var. veatchii)
Synonym
Lotus denticulatus
(Under Acmispon denticulatus)
Synonym
Lotus douglasii
(Under Acmispon decumbens var. decumbens)
Synonym
Lotus formosissimus
(Under Hosackia gracilis)
Synonym
Lotus glaber
(Under Lotus tenuis)
Synonym
Lotus grandiflorus
(Under Acmispon grandiflorus)
Synonym
Lotus grandiflorus var. grandiflorus
(Under Acmispon grandiflorus var. grandiflorus)
Synonym
Lotus grandiflorus var. macranthus
(Under Acmispon grandiflorus var. macranthus)
Synonym
Lotus grandiflorus var. mutabilis
(Under Acmispon grandiflorus var. grandiflorus)
Synonym
Lotus hamatus
(Under Acmispon micranthus)
Synonym
Lotus haydonii
(Under Acmispon haydonii)
Synonym
Lotus heermannii
(Under Acmispon tomentosus)
Synonym
Lotus heermannii var. eriophorus
(Under Acmispon tomentosus var. tomentosus)
Synonym
Lotus heermannii var. heermannii
(Under Acmispon tomentosus var. glabriusculus)
Synonym
Lotus heermannii var. orbicularis
(Under Acmispon tomentosus var. tomentosus)
Synonym
Lotus humistratus
(Under Acmispon brachycarpus)
Synonym
Lotus incanus
(Under Hosackia incana)
Synonym
Lotus junceus
(Under Acmispon junceus)
Synonym
Lotus junceus var. biolettii
(Under Acmispon junceus var. biolettii)
Synonym
Lotus junceus var. junceus
(Under Acmispon junceus var. junceus)
Synonym
Lotus micranthus
(Under Acmispon parviflorus)
Synonym
Lotus neo-incanus
(Under Hosackia incana)
Synonym
Lotus nevadensis
(Under Acmispon decumbens)
Synonym
Lotus nevadensis var. davidsonii
(Under Acmispon decumbens var. davidsonii)
Synonym
Lotus nevadensis var. douglasii
(Under Acmispon decumbens var. decumbens)
Synonym
Lotus nevadensis var. nevadensis
(Under Acmispon decumbens var. decumbens)
Synonym
Lotus nuttallianus
(Under Acmispon prostratus)
Synonym
Lotus oblongifolius var. cupreus
(Under Hosackia oblongifolia var. cuprea)
Synonym
Lotus oblongifolius var. nevadensis
(Under Hosackia oblongifolia var. oblongifolia)
Synonym
Lotus oblongifolius var. oblongifolius
(Under Hosackia oblongifolia var. oblongifolia)
Synonym
Lotus pinnatus
(Under Hosackia pinnata)
Synonym
Lotus procumbens
(Under Acmispon procumbens)
Synonym
Lotus procumbens var. jepsonii
(Under Acmispon procumbens var. jepsonii)
Synonym
Lotus procumbens var. procumbens
(Under Acmispon procumbens var. procumbens)
Synonym
Lotus purshianus var. glaber
(Under Acmispon americanus var. americanus)
Synonym
Lotus purshianus var. purshianus
(Under Acmispon americanus var. americanus)
Synonym
Lotus rigidus
(Under Acmispon rigidus)
Synonym
Lotus rubriflorus
(Under Acmispon rubriflorus)
Synonym
Lotus salsuginosus
(Under Acmispon maritimus)
Synonym
Lotus salsuginosus subsp. brevivexillus
(Under Acmispon maritimus var. brevivexillus)
Synonym
Lotus salsuginosus subsp. salsuginosus
(Under Acmispon maritimus var. maritimus)
Synonym
Lotus salsuginosus var. brevivexillus
(Under Acmispon maritimus var. brevivexillus)
Synonym
Lotus salsuginosus var. salsuginosus
(Under Acmispon maritimus var. maritimus)
Synonym
Lotus scoparius
(Under Acmispon glaber)
Synonym
Lotus scoparius subsp. scoparius
(Under Acmispon glaber var. glaber)
Synonym
Lotus scoparius subsp. traskiae
(Under Acmispon dendroideus var. traskiae)
Synonym
Lotus scoparius var. brevialatus
(Under Acmispon glaber var. brevialatus)
Synonym
Lotus scoparius var. dendroideus
(Under Acmispon dendroideus var. dendroideus)
Synonym
Lotus scoparius var. scoparius
(Under Acmispon glaber var. glaber)
Synonym
Lotus scoparius var. veatchii
(Under Acmispon dendroideus var. veatchii)
Synonym
Lotus stipularis
(Under Hosackia stipularis)
Synonym
Lotus stipularis var. ottleyi
(Under Hosackia stipularis var. ottleyi)
Synonym
Lotus stipularis var. stipularis
(Under Hosackia stipularis var. stipularis)
Synonym
Lotus strigosus
(Under Acmispon strigosus)
Synonym
Lotus strigosus var. hirtellus
(Under Acmispon strigosus)
Synonym
Lotus strigosus var. tomentellus
(Under Acmispon strigosus)
Synonym
Lotus subpinnatus
(Under Acmispon wrangelianus)
Misapplied name
Lotus tenuisNaturalized
Lotus tomentellus
(Under Acmispon strigosus)
Synonym
Lotus uliginosusNaturalized
Lotus wrangelianus
(Under Acmispon wrangelianus)
Synonym
Lotus yollabolliensis
(Under Hosackia yollabolliensis)
Synonym
Ludwigia
  ↳  Key to Ludwigia
FALSE LOOSESTRIFE, WATER PRIMROSE
Ludwigia grandifloraLARGE-FLOWERED PRIMROSE-WILLOWNaturalized
Ludwigia grandiflora subsp. hexapetala
(Under Ludwigia hexapetala)
Synonym
Ludwigia hexapetalaURUGUAYAN PRIMROSE-WILLOWNaturalized
Ludwigia natans var. stipitata
(Under Ludwigia repens)
Synonym
Ludwigia palustrisNative
Ludwigia palustris var. americana
(Under Ludwigia palustris)
Synonym
Ludwigia palustris var. pacifica
(Under Ludwigia palustris)
Synonym
Ludwigia peploidesNaturalized
Ludwigia peploides subsp. montevidensisNaturalized
Ludwigia peploides subsp. peploidesNaturalized
Ludwigia repensNative
Ludwigia repens var. stipitata
(Under Ludwigia repens)
Synonym
Luetkea
Luetkea pectinataNative
Luina
Luina hypoleucaNative
Luma
Luma apiculataARRAYAN, TEMUWaif
LunariaMONEY PLANT, HONESTY
Lunaria annuaNaturalized
Lupinus
  ↳  Key to Lupinus
LUPINE
Lupinus abramsii
(Under Lupinus albifrons var. abramsii)
Synonym
Lupinus adsurgensDREW'S SILKY LUPINENative
Lupinus adsurgens var. lilacinus
(Under Lupinus antoninus)
Synonym, in part
Lupinus adsurgens var. undulatus
(Under Lupinus dalesiae)
Synonym, in part
Lupinus affinisFLESHY LUPINENative
Lupinus albicaulisSICKLE KEELED LUPINENative
Lupinus albicaulis var. silvestris
(Under Lupinus elmeri)
Synonym, in part
Lupinus albifronsNative
Lupinus albifrons var. abramsiiABRAMS' LUPINENative
Lupinus albifrons var. albifronsSILVER BUSH LUPINENative
Lupinus albifrons var. austromontanusSOUTHERN MOUNTAIN LUPINENative
Lupinus albifrons var. collinusLOW-GROWING SILVER LUPINENative
Lupinus albifrons var. douglasiiLONG-BRACTED SILVER LUPINENative
Lupinus albifrons var. flumineus
(Under Lupinus albifrons var. collinus)
Synonym
Lupinus albifrons var. halliiHALL'S BUSH LUPINENative
Lupinus albifrons var. johnstoniiJOHNSTON'S SILVER LUPINENative
Lupinus albifrons var. mediusMOUNTAIN SPRINGS LUPINENative
Lupinus andersoniiANDERSON'S LUPINENative
Lupinus andersonii var. apertus
(Under Lupinus apertus)
Synonym
Lupinus andersonii var. christinae
(Under Lupinus angustiflorus)
Synonym
Lupinus angustiflorusNARROW FLOWERED LUPINENative
Lupinus antoninusANTHONY PEAK LUPINENative
Lupinus apertusSUMMIT LUPINENative
Lupinus arboreusCOASTAL BUSH LUPINENative
Lupinus arbustusSPURRED LUPINENative
Lupinus arbustus subsp. calcaratus
(Under Lupinus arbustus)
Synonym
Lupinus arbustus subsp. silvicola
(Under Lupinus arbustus)
Synonym
Lupinus arbustus var. montanus
(Under Lupinus arbustus)
Synonym
Lupinus arenicola
(Under Lupinus microcarpus var. horizontalis)
Synonym
Lupinus argenteusNative
Lupinus argenteus var. argenteusSILVERY LUPINENative
Lupinus argenteus var. heteranthusSILVER SPURRED LUPINENative
Lupinus argenteus var. meionanthusSMALL FLOWERED SIERRAN LUPINENative
Lupinus argenteus var. montigenusLONG PETIOLED SILVER LUPINENative
Lupinus argenteus var. palmeriPALMER'S LUPINENative
Lupinus argenteus var. tenellus
(Under Lupinus argenteus var. argenteus)
Synonym
Lupinus arizonicusARIZONA LUPINENative
Lupinus arizonicus subsp. arizonicus
(Under Lupinus arizonicus)
Synonym
Lupinus arizonicus subsp. setosissimus
(Under Lupinus arizonicus)
Synonym
Lupinus arizonicus subsp. sonorensis
(Under Lupinus arizonicus)
Synonym
Lupinus arizonicus var. arizonicus
(Under Lupinus arizonicus)
Synonym
Lupinus benthamiiSPIDER LUPINENative
Lupinus benthamii var. benthamii
(Under Lupinus benthamii)
Synonym
Lupinus benthamii var. opimus
(Under Lupinus benthamii)
Synonym
Lupinus bicolorMINIATURE LUPINENative
Lupinus bicolor subsp. marginatus
(Under Lupinus bicolor)
Synonym
Lupinus bicolor subsp. microphyllus
(Under Lupinus bicolor)
Synonym
Lupinus bicolor subsp. pipersmithii
(Under Lupinus bicolor)
Synonym
Lupinus bicolor subsp. tridentatus
(Under Lupinus bicolor)
Synonym
Lupinus bicolor subsp. umbellatus
(Under Lupinus bicolor)
Synonym
Lupinus bicolor var. rostratus
(Under Lupinus bicolor)
Synonym
Lupinus bicolor var. trifidus
(Under Lupinus bicolor)
Synonym
Lupinus brevicaulisSAND LUPINENative
Lupinus breweriNative
Lupinus breweri var. breweriBREWER'S LUPINENative
Lupinus breweri var. bryoidesMATTED BREWER'S LUPINENative
Lupinus breweri var. grandiflorusSHOWY BREWER'S LUPINENative
Lupinus caespitosus
(Under Lupinus lepidus var. utahensis)
Synonym
Lupinus caudatus
(Under Lupinus argenteus var. heteranthus)
Synonym
Lupinus cervinusSANTA LUCIA LUPINENative
Lupinus chamissonisDUNE BUSH LUPINENative
Lupinus citrinusNative
Lupinus citrinus var. citrinusORANGE LUPINENative
Lupinus citrinus var. deflexusMARIPOSA LUPINENative
Lupinus concinnusBAJADA LUPINENative
Lupinus concinnus var. agardhianus
(Under Lupinus concinnus)
Synonym
Lupinus concinnus var. brevior
(Under Lupinus arizonicus)
Synonym
Lupinus concinnus var. concinnus
(Under Lupinus concinnus)
Synonym
Lupinus concinnus var. desertorum
(Under Lupinus concinnus)
Synonym
Lupinus concinnus var. optatus
(Under Lupinus concinnus)
Synonym
Lupinus concinnus var. orcuttii
(Under Lupinus concinnus)
Synonym
Lupinus concinnus var. pallidus
(Under Lupinus concinnus)
Synonym
Lupinus confertus
(Under Lupinus lepidus var. confertus)
Synonym
Lupinus congdonii
(Under Lupinus bicolor)
Synonym
Lupinus constanceiTHE LASSICS LUPINENative
Lupinus covilleiCOVILLE'S SHAGGY LUPINENative
Lupinus croceusMOUNT EDDY LUPINENative
Lupinus culbertsonii
(Under Lupinus lepidus var. culbertsonii)
Synonym
Lupinus dalesiaeQUINCY LUPINENative
Lupinus dedeckerae
(Under Lupinus padrecrowleyi)
Synonym
Lupinus deflexus
(Under Lupinus citrinus var. deflexus)
Synonym
Lupinus densiflorus
(Under Lupinus microcarpus var. densiflorus)
Synonym
Lupinus densiflorus var. aureus
(Under Lupinus microcarpus var. densiflorus)
Synonym
Lupinus densiflorus var. austrocollium
(Under Lupinus microcarpus var. microcarpus)
Synonym
Lupinus densiflorus var. glareosus
(Under Lupinus microcarpus var. horizontalis)
Synonym
Lupinus densiflorus var. lacteus
(Under Lupinus microcarpus var. densiflorus)
Synonym, in part
Lupinus densiflorus var. palustris
(Under Lupinus microcarpus var. microcarpus)
Synonym
Lupinus densiflorus var. persecundus
(Under Lupinus microcarpus var. microcarpus)
Synonym
Lupinus duraniiMONO LUPINENative
Lupinus elatusSILKY LUPINENative
Lupinus elmeriSOUTH FORK MOUNTAIN LUPINENative
Lupinus excubitusDESERT BUSH LUPINENative
Lupinus excubitus var. austromontanus
(Under Lupinus albifrons var. austromontanus)
Synonym
Lupinus excubitus var. hallii
(Under Lupinus albifrons var. hallii)
Synonym
Lupinus excubitus var. johnstonii
(Under Lupinus albifrons var. johnstonii)
Synonym
Lupinus excubitus var. medius
(Under Lupinus albifrons var. medius)
Synonym
Lupinus flavoculatusYELLOW EYED LUPINENative
Lupinus formosusNative
Lupinus formosus var. formosusWESTERN LUPINENative
Lupinus formosus var. hyacinthinus
(Under Lupinus hyacinthinus)
Synonym
Lupinus formosus var. robustusROBUST WESTERN LUPINENative
Lupinus fulcratusGREEN STIPULED LUPINENative
Lupinus gracilentusSLENDER LUPINENative
Lupinus gracilentus var. covillei
(Under Lupinus covillei)
Synonym
Lupinus grayiGRAY'S LUPINENative
Lupinus guadalupensisGUADALUPE ISLAND LUPINENative
Lupinus hirsutissimusSTINGING LUPINENative
Lupinus holmgrenanus
(Under Lupinus polyphyllus var. humicola)
Orthographic variant
Lupinus holmgrenianus
(Under Lupinus polyphyllus var. humicola)
Synonym
Lupinus horizontalis
(Under Lupinus microcarpus var. horizontalis)
Synonym
Lupinus horizontalis var. platypetalus
(Under Lupinus microcarpus var. horizontalis)
Synonym
Lupinus hyacinthinusSAN JACINTO MOUNTAIN LUPINENative
Lupinus hypolasius
(Under Lupinus lepidus var. ramosus)
Synonym
Lupinus inyoensis
(Under Lupinus argenteus var. heteranthus)
Synonym, in part
Lupinus inyoensis
(Under Lupinus padrecrowleyi)
Synonym, in part
Lupinus lapidicolaHELLER'S MOUNT EDDY LUPINENative
Lupinus latifoliusNative
Lupinus latifolius var. barbatus
(Under Lupinus latifolius var. viridifolius)
Synonym
Lupinus latifolius var. columbianus
(Under Lupinus latifolius var. latifolius)
Synonym, in part
Lupinus latifolius var. dudleyiDUDLEY'S BROADLEAF LUPINENative
Lupinus latifolius var. latifoliusBROADLEAF LUPINENative
Lupinus latifolius var. parishiiPARISH'S BROADLEAF LUPINENative
Lupinus latifolius var. viridifoliusSMALL FLOWERED BROADLEAF LUPINENative
Lupinus lepidusNative
Lupinus lepidus var. aridusGREAT BASIN DWARF LUPINENative
Lupinus lepidus var. confertusCLUSTERED TIDY LUPINENative
Lupinus lepidus var. culbertsoniiHOCKETT MEADOW LUPINENative
Lupinus lepidus var. lobbiiLOBB'S DWARF LUPINENative
Lupinus lepidus var. ramosusBRANCHED DWARF LUPINENative
Lupinus lepidus var. sellulusDONNER LAKE LUPINENative
Lupinus lepidus var. utahensisUTAH DWARF LUPINENative
Lupinus leucophyllusVELVET LUPINENative
Lupinus leucophyllus var. canescens
(Under Lupinus leucophyllus)
Synonym
Lupinus littoralisNative
Lupinus littoralis var. littoralisBLUFF LUPINENative
Lupinus littoralis var. variicolorVARICOLORED BLUFF LUPINENative
Lupinus lobbii
(Under Lupinus lepidus var. lobbii)
Synonym
Lupinus longifoliusLONGLEAF BUSH LUPINENative
Lupinus ludovicianusSAN LUIS OBISPO COUNTY LUPINENative
Lupinus luteolusBUTTER LUPINENative
Lupinus lyallii var. danaus
(Under Lupinus lepidus var. lobbii)
Synonym
Lupinus lyallii var. lyallii
(Under Lupinus lepidus var. lobbii)
Synonym
Lupinus magnificusNative
Lupinus magnificus var. glarecolaCOSO MOUNTAIN LUPINENative
Lupinus magnificus var. hesperiusMCGEE MEADOW LUPINENative
Lupinus magnificus var. magnificusPANAMINT MOUNTAIN LUPINENative
Lupinus meionanthus
(Under Lupinus argenteus var. meionanthus)
Synonym
Lupinus microcarpusNative
Lupinus microcarpus var. densiflorusSECUND CHICK LUPINENative
Lupinus microcarpus var. horizontalisROSE CHICK LUPINENative
Lupinus microcarpus var. microcarpusSHAGGY HAIRED CHICK LUPINENative
Lupinus milo-bakeri
(Under Lupinus milobakeri)
Orthographic variant
Lupinus milobakeriMILO BAKER'S LUPINENative
Lupinus montigenus
(Under Lupinus argenteus var. montigenus)
Synonym
Lupinus nanusSKY LUPINENative
Lupinus nanus subsp. apricus
(Under Lupinus nanus)
Synonym
Lupinus nanus subsp. latifolius
(Under Lupinus nanus)
Synonym
Lupinus nanus subsp. menkerae
(Under Lupinus nanus)
Synonym
Lupinus nanus var. maritimus
(Under Lupinus nanus)
Synonym
Lupinus nevadensisNEVADA LUPINENative
Lupinus nipomensisNIPOMO MESA LUPINENative
Lupinus obtusilobusSATIN LUPINENative
Lupinus odoratusMOJAVE LUPINENative
Lupinus onustusPLUMAS LUPINENative
Lupinus pachylobusBIG POD LUPINENative
Lupinus padre-crowleyi
(Under Lupinus padrecrowleyi)
Orthographic variant
Lupinus padrecrowleyiFATHER CROWLEY'S LUPINENative
Lupinus palmeri
(Under Lupinus argenteus var. palmeri)
Synonym
Lupinus paynei
(Under Lupinus albifrons var. hallii)
Synonym
Lupinus peirsoniiPEIRSON'S LUPINENative
Lupinus polycarpus
(Under Lupinus bicolor)
Synonym
Lupinus polyphyllusNative
Lupinus polyphyllus subsp. bernardinus
(Under Lupinus polyphyllus var. burkei)
Synonym
Lupinus polyphyllus subsp. superbus
(Under Lupinus polyphyllus var. burkei)
Synonym
Lupinus polyphyllus var. burkeiBURKE'S LUPINENative
Lupinus polyphyllus var. humicolaHOLMGREN'S LUPINENative
Lupinus polyphyllus var. pallidipes
(Under Lupinus polyphyllus var. polyphyllus)
Synonym, in part
Lupinus polyphyllus var. polyphyllusMEADOW LUPINENative
Lupinus polyphyllus var. saxosusROCK LUPINENative
Lupinus pratensisNative
Lupinus pratensis var. eriostachyusHAIRY BANNERED INYO MEADOW LUPINENative
Lupinus pratensis var. pratensisINYO MEADOW LUPINENative
Lupinus pusillus var. intermontanusINTERMOUNTAIN LUPINENative
Lupinus rivularisRIVERBANK LUPINENative
Lupinus rivularis
(Under Lupinus latifolius)
Synonym, in part
Lupinus rostratus
(Under Lupinus bicolor)
Synonym
Lupinus ruber
(Under Lupinus microcarpus var. microcarpus)
Synonym
Lupinus saxosus
(Under Lupinus polyphyllus var. saxosus)
Synonym
Lupinus sellulus subsp. ursinus
(Under Lupinus lepidus var. sellulus)
Synonym
Lupinus sellulus var. artulus
(Under Lupinus lepidus var. sellulus)
Synonym
Lupinus sellulus var. sellulus
(Under Lupinus lepidus var. sellulus)
Synonym
Lupinus sericatusCOBB MOUNTAIN LUPINENative
Lupinus shockleyiDESERT LUPINENative
Lupinus silvicola
(Under Lupinus arbustus)
Synonym
Lupinus sonomensis
(Under Lupinus formosus var. robustus)
Synonym
Lupinus sparsiflorusCOULTER'S LUPINENative
Lupinus sparsiflorus var. brevior
(Under Lupinus arizonicus)
Synonym
Lupinus spectabilisSHAGGY HAIR LUPINENative
Lupinus stiversiiHARLEQUIN LUPINENative
Lupinus sublanatus
(Under Lupinus argenteus var. argenteus)
Synonym
Lupinus subvexus
(Under Lupinus microcarpus var. microcarpus)
Synonym
Lupinus subvexus var. insularis
(Under Lupinus microcarpus var. microcarpus)
Synonym
Lupinus subvexus var. phoeniceus
(Under Lupinus microcarpus var. microcarpus)
Synonym
Lupinus subvexus var. subvexus
(Under Lupinus microcarpus var. microcarpus)
Synonym
Lupinus subvexus var. transmontanus
(Under Lupinus microcarpus var. microcarpus)
Synonym
Lupinus succulentusARROYO LUPINENative
Lupinus sylvestris
(Under Lupinus albicaulis)
Synonym
Lupinus tegeticulatus
(Under Lupinus breweri var. bryoides)
Synonym
Lupinus tegeticulatus var. duranii
(Under Lupinus duranii)
Synonym
Lupinus tidestromiiTIDESTROM'S LUPINENative
Lupinus tracyiTRACY'S LUPINENative
Lupinus truncatusTRUNCATED LEAF LUPINENative
Lupinus uncialisLILLIPUT LUPINENative
Lupinus vallicola
(Under Lupinus nanus)
Synonym
Lupinus variicolor
(Under Lupinus littoralis var. variicolor)
Synonym
Lupinus violaceus
(Under Lupinus onustus)
Synonym
Lupinus viridifolius
(Under Lupinus latifolius var. viridifolius)
Synonym
Luzula
  ↳  Key to Luzula
HAIRY WOOD RUSH
Luzula campestris subsp. sudetica
(Under Luzula orestera)
Illegitimate name
Luzula campestris var. columbiana
(Under Luzula cascadensis)
Synonym
Luzula campestris var. comosa
(Under Luzula comosa)
Synonym
Luzula campestris var. congesta
(Under Luzula orestera)
Misapplied name
Luzula campestris var. macrantha
(Under Luzula macrantha)
Synonym
Luzula cascadensisNative
Luzula comosaNative
Luzula comosa var. comosaNative
Luzula comosa var. congesta
(Under Luzula comosa var. comosa)
Misapplied name
Luzula comosa var. laxaNative
Luzula comosa var. macrantha
(Under Luzula macrantha)
Synonym
Luzula comosa var. subsessilis
(Under Luzula subsessilis)
Synonym
Luzula congesta
(Under Luzula comosa var. comosa)
Misapplied name
Luzula congesta
(Under Luzula orestera)
Misapplied name
Luzula divaricataNative
Luzula glabrata
(Under Luzula piperi)
Misapplied name
Luzula macranthaNative
Luzula multiflora subsp. comosa
(Under Luzula comosa)
Synonym
Luzula multiflora subsp. congesta
(Under Luzula orestera)
Misapplied name
Luzula multiflora var. comosa
(Under Luzula comosa)
Synonym
Luzula multiflora var. congesta
(Under Luzula orestera)
Misapplied name
Luzula oresteraNative
Luzula parvifloraNative
Luzula parviflora subsp. divaricata
(Under Luzula divaricata)
Synonym
Luzula parviflora subsp. fastigiata
(Under Luzula parviflora)
Synonym
Luzula parviflora subsp. melanocarpa
(Under Luzula parviflora)
Synonym
Luzula parviflora var. divaricata
(Under Luzula divaricata)
Synonym
Luzula parviflora var. fastigiata
(Under Luzula parviflora)
Synonym
Luzula parviflora var. melanocarpa
(Under Luzula parviflora)
Synonym
Luzula parviflora var. parviflora
(Under Luzula parviflora)
Synonym
Luzula parviflora var. subcongesta
(Under Luzula subcongesta)
Synonym
Luzula piperiNative
Luzula spadicea var. subcongesta
(Under Luzula subcongesta)
Synonym
Luzula spicata subsp. saximontana
(Under Luzula spicata subsp. spicata)
Synonym
Luzula spicata subsp. spicataNative
Luzula spicata var. nova
(Under Luzula spicata subsp. spicata)
Synonym
Luzula subcongestaNative
Luzula subsessilisNative
Luzula sudetica
(Under Luzula orestera)
Misapplied name
Luzula wahlenbergii subsp. piperi
(Under Luzula piperi)
Synonym
LychnisCAMPION
Lychnis alba
(Under Silene latifolia)
Synonym
Lychnis coronariaROSE CAMPIONNaturalized
Lycium
  ↳  Key to Lycium
BOX-THORN, WOLFBERRY
Lycium andersoniiNative
Lycium andersonii var. deserticola
(Under Lycium andersonii)
Synonym
Lycium barbarumMATRIMONY VINENaturalized
Lycium brevipesNative
Lycium brevipes var. brevipesNative
Lycium brevipes var. hasseiSANTA CATALINA ISLAND DESERT-THORNNative
Lycium californicumCALIFORNIA BOX-THORNNative
Lycium cooperiNative
Lycium fremontiiNative
Lycium halimifolium
(Under Lycium barbarum)
Synonym
Lycium hassei
(Under Lycium brevipes var. hassei)
Synonym
Lycium pallidum var. oligospermumNative
Lycium parishiiPARISH'S DESERT-THORNNative
Lycium torreyiNative
Lycium verrucosumSAN NICOLAS ISLAND DESERT-THORNNative
Lycopersicon
  ↳  Key to Lycopersicon
Lycopersicon esculentumTOMATONaturalized
Lycopersicon peruvianumNaturalized
Lycopodiaceae
  ↳  Key to Lycopodiaceae
CLUB-MOSS FAMILY
LycopodiellaBOG CLUB-MOSS
Lycopodiella inundataINUNDATED BOG CLUB-MOSSNative
LycopodiumRUNNING-PINE, CLUB-MOSS
Lycopodium clavatumRUNNING-PINENative
Lycopodium inundatum
(Under Lycopodiella inundata)
Synonym
Lycopus
  ↳  Key to Lycopus
BUGLEWEED
Lycopus americanusNative
Lycopus asperNative
Lycopus lucidus
(Under Lycopus asper)
Unabridged misapplied name
Lycopus uniflorusNORTHERN BUGLEWEEDNative
Lycurus phleoides
(Under Muhlenbergia alopecuroides)
Misapplied name
Lycurus setosus
(Under Muhlenbergia alopecuroides)
Synonym
Lygodesmia exigua
(Under Prenanthella exigua)
Synonym
LyonothamnusCATALINA IRONWOOD
Lyonothamnus floribundus
  ↳  Key to Lyonothamnus floribundus
Native
Lyonothamnus floribundus subsp. aspleniifoliusSANTA CRUZ ISLAND IRONWOODNative
Lyonothamnus floribundus subsp. floribundusSANTA CATALINA ISLAND IRONWOODNative
Lyonothamnus floribundus var. aspleniifolius
(Under Lyonothamnus floribundus subsp. aspleniifolius)
Synonym
Lyrocarpa
Lyrocarpa coulteriCOULTER'S LYREPODNative
Lyrocarpa coulteri var. coulteri
(Under Lyrocarpa coulteri)
Synonym
Lyrocarpa coulteri var. palmeri
(Under Lyrocarpa coulteri)
Synonym
Lysichiton
Lysichiton americanum
(Under Lysichiton americanus)
Orthographic variant
Lysichiton americanusYELLOW SKUNK-CABBAGENative
Lysimachia
  ↳  Key to Lysimachia
LOOSESTRIFE
Lysimachia arvensisSCARLET PIMPERNELNaturalized
Lysimachia europaeaARCTIC STARFLOWERNative
Lysimachia latifoliaPACIFIC STARFLOWERNative
Lysimachia maritimaSEA MILKWORTNative
Lysimachia minimaCHAFFWEEDNative
Lysimachia monelliFLAXLEAF PIMPERNELWaif
Lysimachia nummulariaCREEPING-JENNYNaturalized
Lysimachia thyrsifloraTUFTED LOOSESTRIFENative
Lythraceae
  ↳  Key to Lythraceae
LOOSESTRIFE FAMILY
Lythrum
  ↳  Key to Lythrum
LOOSESTRIFE
Lythrum alatum var. linearifolium
(Under Lythrum californicum)
Synonym
Lythrum californicumCALIFORNIA LOOSESTRIFENative
Lythrum hyssopifoliaNaturalized
Lythrum portulaNaturalized
Lythrum salicariaPURPLE LOOSESTRIFENaturalized
Lythrum sanfordii
(Under Lythrum californicum)
Synonym
Lythrum tribracteatumNaturalized
MachaerantheraTANSY-ASTER
Machaeranthera arida
(Under Leucosyris arida)
Synonym
Machaeranthera asteroides
(Under Dieteria asteroides)
Synonym
Machaeranthera asteroides var. asteroides
(Under Dieteria asteroides var. asteroides)
Synonym
Machaeranthera asteroides var. lagunensis
(Under Dieteria asteroides var. lagunensis)
Synonym
Machaeranthera canescens subsp. canescens
(Under Dieteria canescens var. canescens)
Synonym
Machaeranthera canescens var. canescens
(Under Dieteria canescens var. canescens)
Synonym
Machaeranthera canescens var. incana
(Under Dieteria canescens var. incana)
Synonym
Machaeranthera canescens var. leucanthemifolia
(Under Dieteria canescens var. leucanthemifolia)
Synonym
Machaeranthera canescens var. shastensis
(Under Dieteria canescens var. shastensis)
Synonym
Machaeranthera canescens var. ziegleri
(Under Dieteria canescens var. ziegleri)
Synonym
Machaeranthera carnosa
(Under Leucosyris carnosa)
Synonym
Machaeranthera carnosa var. intricata
(Under Leucosyris carnosa)
Synonym
Machaeranthera cognata
(Under Xylorhiza cognata)
Synonym
Machaeranthera gracilis
(Under Xanthisma gracile)
Synonym
Machaeranthera juncea
(Under Xanthisma junceum)
Synonym
Machaeranthera orcuttii
(Under Xylorhiza orcuttii)
Synonym
Machaeranthera pinnatifida subsp. gooddingii
(Under Xanthisma spinulosum var. gooddingii)
Synonym, in part
Machaeranthera pinnatifida var. gooddingii
(Under Xanthisma spinulosum var. gooddingii)
Synonym
Machaeranthera tanacetifoliaNative
Machaeranthera tephrodes
(Under Dieteria asteroides var. asteroides)
Synonym
Machaerocarpus californicus
(Under Damasonium californicum)
Synonym
MacluraOSAGE ORANGE
Maclura pomiferaNaturalized
Macrocalyx bipinnatifidus
(Under Eucrypta chrysanthemifolia var. bipinnatifida)
Synonym
Macrocalyx chrysanthemifolius
(Under Eucrypta chrysanthemifolia var. chrysanthemifolia)
Synonym
Macrocalyx micranthus
(Under Eucrypta micrantha)
Synonym
Macroscapa volubilis
(Under Dichelostemma volubile)
Synonym
Madia
  ↳  Key to Madia
TARWEED, TARPLANT
Madia anomalaNative
Madia bolanderi
(Under Kyhosia bolanderi)
Synonym
Madia capitata
(Under Madia sativa)
Synonym
Madia citrigracilisNative
Madia citriodoraNative
Madia doris-nilesiae
(Under Harmonia doris-nilesiae)
Synonym
Madia elegansCOMMON MADIANative
Madia elegans subsp. densifolia
(Under Madia elegans)
Synonym
Madia elegans subsp. vernalis
(Under Madia elegans)
Synonym
Madia elegans subsp. wheeleri
(Under Madia elegans)
Synonym
Madia exiguaNative
Madia glomerataMOUNTAIN TARWEEDNative
Madia gracilisGUMWEEDNative
Madia gracilis subsp. collina
(Under Madia gracilis)
Synonym
Madia gracilis subsp. pilosa
(Under Madia gracilis)
Synonym
Madia hallii
(Under Harmonia hallii)
Synonym
Madia madioides
(Under Anisocarpus madioides)
Synonym
Madia minima
(Under Hemizonella minima)
Synonym
Madia nutans
(Under Harmonia nutans)
Synonym
Madia radiataSHOWY GOLDEN MADIANative
Madia rammii
(Under Jensia rammii)
Synonym
Madia sativaCOAST TARWEEDNative
Madia stebbinsii
(Under Harmonia stebbinsii)
Synonym
Madia subspicataNative
Madia yosemitana
(Under Jensia yosemitana)
Synonym
Mahonia dictyota
(Under Berberis aquifolium var. dictyota)
Synonym
Mahonia fremontii
(Under Berberis fremontii)
Synonym
Mahonia haematocarpa
(Under Berberis haematocarpa)
Synonym
Mahonia higginsiae
(Under Berberis higginsiae)
Synonym
Mahonia nervosa var. mendocinensis
(Under Berberis nervosa)
Synonym
Mahonia nevinii
(Under Berberis nevinii)
Synonym
Mahonia pinnata subsp. insularis
(Under Berberis pinnata subsp. insularis)
Synonym
Mahonia pinnata subsp. pinnata
(Under Berberis pinnata subsp. pinnata)
Synonym
Mahonia repens
(Under Berberis aquifolium var. repens)
Synonym
Mahonia sonnei
(Under Berberis aquifolium var. repens)
Synonym
Maianthemum
  ↳  Key to Maianthemum
FALSE LILY-OF-THE-VALLEY, FALSE SOLOMON'S SEAL
Maianthemum dilatatumNative
Maianthemum racemosumNative
Maianthemum racemosum subsp. amplexicaule
(Under Maianthemum racemosum)
Synonym
Maianthemum stellatumNative
Malacomeris incanus
(Under Malacothrix incana)
Synonym
Malacothamnus
  ↳  Key to Malacothamnus
BUSHMALLOW
Malacothamnus abbottiiABBOTT'S BUSHMALLOWNative
Malacothamnus aboriginumINDIAN VALLEY BUSHMALLOWNative
Malacothamnus arcuatusBEWILDERING BUSHMALLOWNative
Malacothamnus arcuatus var. arcuatusWESTERN BEWILDERING BUSHMALLOW, ARCUATE BUSHMALLOWNative
Malacothamnus arcuatus var. elmeriEASTERN BEWILDERING BUSHMALLOW, HALL'S BUSHMALLOWNative
Malacothamnus astrotentaculatusSTARRY-TENTACLED BUSHMALLOWNative
Malacothamnus clementinusSAN CLEMENTE ISLAND BUSHMALLOWNative
Malacothamnus davidsoniiTUJUNGA BUSHMALLOW, DAVIDSON'S BUSHMALLOWNative
Malacothamnus densiflorusNative
Malacothamnus densiflorus var. densiflorusFEW-RAYED BUSHMALLOWNative
Malacothamnus densiflorus var. viscidusEMERALD UNICORN BUSHMALLOWNative
Malacothamnus discombobulatusDISCOMBOBULATING BUSHMALLOWNative
Malacothamnus eastwoodiaeALICE'S LOVELY BUSHMALLOWNative
Malacothamnus enigmaticusENIGMATIC BUSHMALLOWNative
Malacothamnus fasciculatusNative
Malacothamnus fasciculatus subsp. catalinensis
(Under Malacothamnus fasciculatus var. catalinensis)
Synonym
Malacothamnus fasciculatus subsp. laxiflorus
(Under Malacothamnus fasciculatus var. laxiflorus)
Synonym
Malacothamnus fasciculatus var. catalinensisSANTA CATALINA ISLAND BUSHMALLOWNative
Malacothamnus fasciculatus var. fasciculatusSOUTHERN COASTAL BUSHMALLOWNative
Malacothamnus fasciculatus var. laxiflorusSPLENDID BUSHMALLOWNative
Malacothamnus fasciculatus var. nesioticusSANTA CRUZ ISLAND BUSHMALLOWNative
Malacothamnus fasciculatus var. nuttallii
(Under Malacothamnus nuttallii)
Synonym
Malacothamnus foliosusENSENADA BUSHMALLOWNaturalized
Malacothamnus fremontiiUNFURLED BUSHMALLOWNative
Malacothamnus fremontii subsp. cercophorus
(Under Malacothamnus fremontii var. fremontii)
Synonym
Malacothamnus fremontii var. exfibulosusSHORT-HAIRED UNFURLED BUSHMALLOW, HELLER'S BUSHMALLOWNative
Malacothamnus fremontii var. fremontiiLONG-HAIRED UNFURLED BUSHMALLOWNative
Malacothamnus gracilis
(Under Malacothamnus jonesii var. gracilis)
Synonym
Malacothamnus hallii
(Under Malacothamnus arcuatus var. elmeri)
Synonym
Malacothamnus helleri
(Under Malacothamnus fremontii var. exfibulosus)
Synonym
Malacothamnus howellii
(Under Malacothamnus fremontii var. fremontii)
Synonym
Malacothamnus involucratusCARMEL VALLEY BUSHMALLOWNative
Malacothamnus jonesiiNative
Malacothamnus jonesii var. gracilisHUASNA BUSHMALLOW, SLENDER BUSHMALLOWNative
Malacothamnus jonesii var. jonesiiJONES'S BUSHMALLOWNative
Malacothamnus jonesii var. niveusFRAGRANT-SNOW BUSHMALLOWNative
Malacothamnus lucianusSANTA LUCIA BUSHMALLOW, ARROYO SECO BUSHMALLOWNative
Malacothamnus marrubioidesSANTA CLARITA BUSHMALLOWNative
Malacothamnus mendocinensisMENDOCINO BUSHMALLOWNative
Malacothamnus nesioticus
(Under Malacothamnus fasciculatus var. nesioticus)
Synonym
Malacothamnus niveus
(Under Malacothamnus jonesii var. niveus)
Synonym
Malacothamnus nuttalliiOJAI BUSHMALLOWNative
Malacothamnus orbiculatusTEHACHAPI BUSHMALLOWNative
Malacothamnus orbiculatus subsp. clementinus
(Under Malacothamnus clementinus)
Synonym
Malacothamnus palmeriCAMBRIA BUSHMALLOWNative
Malacothamnus palmeri var. involucratus
(Under Malacothamnus involucratus)
Synonym
Malacothamnus palmeri var. lucianus
(Under Malacothamnus lucianus)
Synonym
Malacothamnus paniculatus
(Under Malacothamnus foliosus)
Synonym
Malacothamnus parishii
(Under Malacothamnus fasciculatus var. laxiflorus)
Synonym
Malacothrix
  ↳  Key to Malacothrix
Malacothrix altissima
(Under Malacothrix saxatilis var. tenuifolia)
Synonym
Malacothrix californicaNative
Malacothrix clevelandiiNative
Malacothrix coulteriSNAKE'S-HEADNative
Malacothrix coulteri var. cognata
(Under Malacothrix coulteri)
Synonym
Malacothrix flocciferaNative
Malacothrix foliosaNative
Malacothrix foliosa subsp. crispifoliaWAVY-LEAVED MALACOTHRIXNative
Malacothrix foliosa subsp. foliosaLEAFY MALACOTHRIXNative
Malacothrix foliosa subsp. philbrickiiPHILBRICK'S MALACOTHRIXNative
Malacothrix foliosa subsp. polycephalaMANY-HEADED MALACOTHRIXNative
Malacothrix glabrataDESERT DANDELIONNative
Malacothrix incanaDUNEDELIONNative
Malacothrix incana var. succulenta
(Under Malacothrix incana)
Synonym
Malacothrix indecoraSANTA CRUZ ISLAND MALACOTHRIXNative
Malacothrix junakiiJUNAK'S MALACOTHRIXNative
Malacothrix phaeocarpaDUSKY-FRUITED MALACOTHRIXNative
Malacothrix saxatilisNative
Malacothrix saxatilis var. altissima
(Under Malacothrix saxatilis var. tenuifolia)
Synonym
Malacothrix saxatilis var. arachnoideaCARMEL VALLEY MALACOTHRIXNative
Malacothrix saxatilis var. commutataNative
Malacothrix saxatilis var. implicataNative
Malacothrix saxatilis var. saxatilisCLIFF MALACOTHRIXNative
Malacothrix saxatilis var. tenuifoliaNative
Malacothrix senecioides
(Under Malacothrix clevelandii)
Synonym
Malacothrix similisMEXICAN MALACOTHRIXNative
Malacothrix sonchoidesNative
Malacothrix squalidaISLAND MALACOTHRIXNative
Malacothrix stebbinsiiNative
Malacothrix torreyiNative
Malaxis
Malaxis brachypoda
(Under Malaxis monophyllos var. brachypoda)
Synonym
Malaxis monophyllos subsp. brachypoda
(Under Malaxis monophyllos var. brachypoda)
Synonym
Malaxis monophyllos var. brachypodaWHITE BOG ADDER'S-MOUTHNative
Malcolmia africana
(Under Strigosella africana)
Synonym
Malephora
Malephora croceaNaturalized
Malephora purpureo-crocea
(Under Malephora crocea)
Synonym
Malosma
Malosma laurinaLAUREL SUMACNative
Malperia
Malperia tenuisBROWN TURBANSNative
Malus
  ↳  Key to Malus
Malus domestica
(Under Malus pumila)
Synonym
Malus fuscaOREGON CRAB APPLENative
Malus pumilaAPPLENaturalized
Malus pumila var. domestica
(Under Malus pumila)
Synonym
Malus sylvestris
(Under Malus pumila)
Misapplied name
Malva
  ↳  Key to Malva
MALLOW
Malva arboreaTREE MALLOWNaturalized
Malva assurgentifloraISLAND MALLOWNative
Malva assurgentiflora subsp. assurgentiflora
(Under Malva assurgentiflora)
Synonym ined.
Malva assurgentiflora subsp. glabra
(Under Malva assurgentiflora)
Synonym ined.
Malva crispa
(Under Malva verticillata var. crispa)
Synonym
Malva dendromorpha
(Under Malva arborea)
Superfluous name
Malva fasciculata
(Under Malacothamnus fasciculatus var. fasciculatus)
Synonym
Malva linnaei
(Under Malva multiflora)
Superfluous name
Malva multifloraCRETAN MALLOWNaturalized
Malva neglectaCOMMON MALLOWNaturalized
Malva nicaeensisBULL MALLOWNaturalized
Malva parvifloraCHEESEWEED, LITTLE MALLOWNaturalized
Malva pseudolavatera
(Under Malva multiflora)
Synonym
Malva sylvestrisHIGH MALLOWNaturalized
Malva sylvestris var. mauritiana
(Under Malva sylvestris)
Synonym
Malva verticillata var. crispaCRISPED MALLOW, CURLED MALLOWGarden and urban weed
Malvaceae
  ↳  Key to Malvaceae
MALLOW FAMILY
Malvastrum abbottii
(Under Malacothamnus abbottii)
Synonym
Malvastrum aboriginum
(Under Malacothamnus aboriginum)
Synonym
Malvastrum arcuatum
(Under Malacothamnus arcuatus var. arcuatus)
Synonym
Malvastrum capense
(Under Anisodontea capensis)
Synonym
Malvastrum catalinense
(Under Malacothamnus fasciculatus var. catalinensis)
Synonym
Malvastrum clementinum
(Under Malacothamnus clementinus)
Synonym
Malvastrum davidsonii
(Under Malacothamnus davidsonii)
Synonym
Malvastrum densiflorum
(Under Malacothamnus densiflorus var. densiflorus)
Synonym
Malvastrum dudleyi
(Under Malacothamnus jonesii var. jonesii)
Synonym
Malvastrum exilis
(Under Eremalche exilis)
Synonym
Malvastrum fasciculatum
(Under Malacothamnus fasciculatus var. fasciculatus)
Synonym
Malvastrum fasciculatum var. catalinense
(Under Malacothamnus fasciculatus var. catalinensis)
Synonym
Malvastrum fasciculatum var. laxiflorum
(Under Malacothamnus fasciculatus var. laxiflorus)
Synonym
Malvastrum fasciculatum var. nesioticum
(Under Malacothamnus fasciculatus var. nesioticus)
Synonym
Malvastrum fasciculatum var. nuttallii
(Under Malacothamnus nuttallii)
Synonym
Malvastrum foliosum
(Under Malacothamnus foliosus)
Synonym
Malvastrum fremontii
(Under Malacothamnus fremontii var. fremontii)
Synonym
Malvastrum fremontii subsp. exfibulosum
(Under Malacothamnus fremontii var. exfibulosus)
Synonym
Malvastrum fremontii var. cercophorum
(Under Malacothamnus fremontii var. fremontii)
Synonym
Malvastrum fremontii var. helleri
(Under Malacothamnus fremontii var. exfibulosus)
Synonym
Malvastrum fremontii var. niveum
(Under Malacothamnus jonesii var. niveus)
Synonym
Malvastrum fremontii var. orbiculatum
(Under Malacothamnus orbiculatus)
Synonym
Malvastrum gabrielense
(Under Malacothamnus marrubioides)
Synonym
Malvastrum gracile
(Under Malacothamnus jonesii var. gracilis)
Synonym
Malvastrum hallii
(Under Malacothamnus arcuatus var. elmeri)
Synonym
Malvastrum helleri
(Under Malacothamnus fremontii var. exfibulosus)
Synonym
Malvastrum howellii
(Under Malacothamnus fremontii var. fremontii)
Synonym
Malvastrum howellii var. cordatum
(Under Malacothamnus fremontii var. fremontii)
Synonym
Malvastrum involucratum
(Under Malacothamnus involucratus)
Synonym
Malvastrum jonesii
(Under Malacothamnus jonesii var. jonesii)
Synonym
Malvastrum kernense
(Under Eremalche parryi subsp. kernensis)
Synonym
Malvastrum marrubioides
(Under Malacothamnus marrubioides)
Synonym
Malvastrum marrubioides var. paniculatum
(Under Malacothamnus foliosus)
Synonym
Malvastrum mendocinense
(Under Malacothamnus mendocinensis)
Synonym
Malvastrum nesioticum
(Under Malacothamnus fasciculatus var. nesioticus)
Synonym
Malvastrum nesioticum subsp. nuttallii
(Under Malacothamnus nuttallii)
Synonym
Malvastrum niveum
(Under Malacothamnus jonesii var. niveus)
Synonym
Malvastrum nuttallii
(Under Malacothamnus nuttallii)
Synonym
Malvastrum orbiculatum
(Under Malacothamnus orbiculatus)
Synonym
Malvastrum palmeri
(Under Malacothamnus palmeri)
Synonym
Malvastrum paniculatum
(Under Malacothamnus foliosus)
Synonym
Malvastrum parishii
(Under Malacothamnus fasciculatus var. laxiflorus)
Synonym
Malvastrum rotundifolium
(Under Eremalche rotundifolia)
Synonym
Malvastrum splendidum
(Under Malacothamnus fasciculatus var. laxiflorus)
Synonym
Malvastrum thurberi
(Under Malacothamnus fasciculatus var. fasciculatus)
Synonym
Malvastrum thurberi var. laxiflorum
(Under Malacothamnus fasciculatus var. laxiflorus)
Synonym
Malvastrum viscidum
(Under Malacothamnus densiflorus var. viscidus)
Synonym
Malvella
Malvella leprosaALKALI-MALLOW, WHITE-WEEDNative
Malveopsis arcuata
(Under Malacothamnus arcuatus var. arcuatus)
Synonym
Malveopsis fasciculata
(Under Malacothamnus fasciculatus var. fasciculatus)
Synonym
Malveopsis fremontii
(Under Malacothamnus fremontii var. fremontii)
Synonym
Malveopsis splendida
(Under Malacothamnus fasciculatus var. laxiflorus)
Synonym
Mammillaria
  ↳  Key to Mammillaria
FISHHOOK CACTUS
Mammillaria alversonii
(Under Escobaria alversonii)
Synonym
Mammillaria deserti
(Under Escobaria chlorantha)
Synonym
Mammillaria dioicaNative
Mammillaria dioica var. incerta
(Under Mammillaria dioica)
Synonym
Mammillaria grahamii var. grahamiiGRAHAM'S FISHHOOK CACTUSNative
Mammillaria microcarpa
(Under Mammillaria grahamii var. grahamii)
Synonym
Mammillaria milleri
(Under Mammillaria grahamii var. grahamii)
Synonym
Mammillaria tetrancistraNative
Marah
  ↳  Key to Marah
MAN-ROOT, WILD CUCUMBER
Marah fabaceaCALIFORNIA MAN-ROOTNative
Marah fabacea var. agrestis
(Under Marah fabacea)
Synonym
Marah fabaceus
(Under Marah fabacea)
Orthographic variant
Marah guadalupensis
(Under Marah macrocarpa)
Synonym
Marah horridaSIERRA MAN-ROOTNative
Marah horridus
(Under Marah horrida)
Orthographic variant
Marah macrocarpaCHILICOTHENative
Marah macrocarpa var. macrocarpa
(Under Marah macrocarpa)
Synonym
Marah macrocarpa var. major
(Under Marah macrocarpa)
Synonym
Marah macrocarpa var. micrantha
(Under Marah macrocarpa)
Synonym
Marah macrocarpus
(Under Marah macrocarpa)
Orthographic variant
Marah macrocarpus var. macrocarpus
(Under Marah macrocarpa)
Orthographic variant
Marah macrocarpus var. major
(Under Marah macrocarpa)
Orthographic variant
Marah macrocarpus var. micranthus
(Under Marah macrocarpa)
Orthographic variant
Marah oreganaCOAST MAN-ROOTNative
Marah oreganus
(Under Marah oregana)
Orthographic variant
Marah watsoniiTAW MAN-ROOTNative
Marina
  ↳  Key to Marina
Marina orcuttii var. orcuttiiCALIFORNIA MARINANative
Marina parryiNative
MarrubiumHOREHOUND
Marrubium vulgareNaturalized
Marsilea
  ↳  Key to Marsilea
WATER-CLOVER
Marsilea oligosporaNative
Marsilea vestita subsp. vestitaNative
Marsilea vestita var. oligospora
(Under Marsilea oligospora)
Synonym
Marsileaceae
  ↳  Key to Marsileaceae
MARSILEA FAMILY
MartyniaceaeUNICORN-PLANT FAMILY
Maruta cotula
(Under Anthemis cotula)
Synonym
Matelea
Matelea parvifoliaSPEARLEAFNative
Matricaria
  ↳  Key to Matricaria
Matricaria chamomillaGERMAN CHAMOMILENaturalized
Matricaria discoideaPINEAPPLE WEED, RAYLESS CHAMOMILENative
Matricaria globifera
(Under Oncosiphon pilulifer)
Synonym
Matricaria inodora
(Under Tripleurospermum inodorum)
Synonym
Matricaria matricarioides
(Under Matricaria discoidea)
Misapplied name
Matricaria occidentalisVALLEY MAYWEEDNative
MatthiolaSTOCK
Matthiola incanaNaturalized
Maurandella
Maurandella antirrhinifloraVIOLET TWINING SNAPDRAGONNative
Maurandya antirrhiniflora
(Under Maurandella antirrhiniflora)
Synonym
Maurandya antirrhiniflora subsp. antirrhiniflora
(Under Maurandella antirrhiniflora)
Synonym
Maurandya petrophila
(Under Holmgrenanthe petrophila)
Synonym
Mauranthemum
Mauranthemum paludosumMINI-MARGUERITEWaif
MaytenusMAITEN
Maytenus boariaMAITEN TREENaturalized
Meconella
  ↳  Key to Meconella
Meconella californicaNative
Meconella denticulataNative
Meconella linearis
(Under Hesperomecon linearis)
Synonym
Meconella oreganaOREGON MECONELLANative
Meconella oregana var. denticulata
(Under Meconella denticulata)
Synonym
Medicago
  ↳  Key to Medicago
ALFALFA, MEDICK
Medicago arabicaBURCLOVER, SPOTTED BURCLOVERNaturalized
Medicago hispida
(Under Medicago polymorpha)
Synonym
Medicago hispida var. confinis
(Under Medicago polymorpha)
Synonym
Medicago hispida var. hispida
(Under Medicago polymorpha)
Synonym
Medicago lupulinaBLACK MEDICKNaturalized
Medicago lupulina var. cupaniana
(Under Medicago lupulina)
Synonym
Medicago minimaBURCLOVERNaturalized
Medicago minima subsp. brevispina
(Under Medicago polymorpha)
Synonym
Medicago minima var. brevispina
(Under Medicago polymorpha)
Synonym
Medicago muricata
(Under Medicago truncatula)
Misapplied name
Medicago orbicularisAgricultural, garden, or urban weed
Medicago polymorphaCALIFORNIA BURCLOVERNaturalized
Medicago polymorpha var. brevispina
(Under Medicago polymorpha)
Synonym
Medicago polymorpha var. minima
(Under Medicago minima)
Synonym
Medicago praecoxNaturalized
Medicago rigidulaTIFTON MEDICK, TIFTON BURCLOVERNaturalized
Medicago sativaALFALFANaturalized
Medicago sativa subsp. falcata
(Under Medicago sativa)
Synonym
Medicago sativa subsp. sativa
(Under Medicago sativa)
Synonym
Medicago scutellataSNAIL MEDICKWaif
Medicago truncatulaBARREL MEDICK, BARREL CLOVERNaturalized
Melaleuca
  ↳  Key to Melaleuca
BOTTLEBRUSH
Melaleuca citrinaCRIMSON BOTTLEBRUSHWaif
Melaleuca viminalisWEEPING BOTTLEBRUSHNaturalized
Melanthiaceae
  ↳  Key to Melanthiaceae
FALSE-HELLEBORE FAMILY
MeliaBEAD TREE
Melia azedarachCHINA BERRY, PERSIAN LILACNaturalized
MeliaceaeMAHOGANY FAMILY
Melica
  ↳  Key to Melica
ONIONGRASS, MELIC
Melica aristataAWNED MELICNative
Melica bulbosaONIONGRASSNative
Melica californicaCALIFORNIA MELICNative
Melica frutescensWOODY MELICNative
Melica fugaxLITTLE MELICNative
Melica geyeriGEYER'S ONIONGRASSNative
Melica geyeri var. aristulata
(Under Melica geyeri)
Synonym
Melica geyeri var. geyeri
(Under Melica geyeri)
Synonym
Melica harfordiiNative
Melica imperfectaLITTLE CALIFORNIA MELICANative
Melica spectabilisPURPLE ONIONGRASSNative
Melica strictaROCK MELICNative
Melica stricta var. albicaulis
(Under Melica stricta)
Synonym
Melica stricta var. stricta
(Under Melica stricta)
Synonym
Melica subulataALASKAN ONIONGRASSNative
Melica torreyanaTORREY'S MELICNative
Melilotus
  ↳  Key to Melilotus
SWEETCLOVER
Melilotus alba
(Under Melilotus albus)
Orthographic variant
Melilotus albusWHITE SWEETCLOVERNaturalized
Melilotus indica
(Under Melilotus indicus)
Orthographic variant
Melilotus indicusSOURCLOVERNaturalized
Melilotus officinalisYELLOW SWEETCLOVERNaturalized
Melinis
Melinis repens subsp. repensNATAL GRASS, RUBY GRASSNaturalized
Melissa
Melissa officinalisLEMON BALMNaturalized
Menodora
  ↳  Key to Menodora
Menodora scabraROUGH MENODORANative
Menodora scabra var. glabrescensNative
Menodora scabra var. scabraNative
Menodora scoparia
(Under Menodora scabra var. glabrescens)
Synonym
Menodora spinescensNative
Menodora spinescens var. mohavensisNative
Menodora spinescens var. spinescensNative
Mentha
  ↳  Key to Mentha
MINT
Mentha ×gracilisSCOTCH SPEARMINTNaturalized
Mentha ×piperitaPEPPERMINTNaturalized
Mentha ×rotundifoliaAPPLE MINTNaturalized
Mentha ×smithianaREDSTEM MINTNaturalized
Mentha ×villosaAPPLE MINTNaturalized
Mentha aquaticaWATERMINTNaturalized
Mentha arvensisFIELD MINTNaturalized
Mentha arvensis var. canadensis
(Under Mentha canadensis)
Synonym
Mentha arvensis var. villosa
(Under Mentha arvensis)
Synonym
Mentha arvensis var. villosa
(Under Mentha canadensis)
Synonym
Mentha canadensisAMERICAN CORNMINT, JAPANESE PEPPERMINTNative
Mentha citrata
(Under Mentha aquatica)
Synonym
Mentha citrata
(Under Mentha ×piperita)
Unabridged misapplied name
Mentha gentilis
(Under Mentha ×gracilis)
Unabridged misapplied name
Mentha longifoliaNaturalized
Mentha pulegiumPENNYROYALNaturalized
Mentha rotundifolia
(Under Mentha suaveolens)
Unabridged misapplied name
Mentha spicataSPEARMINTNaturalized
Mentha suaveolensPINEAPPLE MINTNaturalized
Mentzelia
  ↳  Key to Mentzelia
BLAZING STAR
Mentzelia affinisNative
Mentzelia albicaulisNative
Mentzelia congestaNative
Mentzelia congesta var. davidsoniana
(Under Mentzelia congesta)
Synonym
Mentzelia croceaNative
Mentzelia desertorumNative
Mentzelia dispersaNative
Mentzelia dispersa var. compacta
(Under Mentzelia dispersa)
Synonym
Mentzelia dispersa var. dispersa
(Under Mentzelia dispersa)
Synonym
Mentzelia dispersa var. latifolia
(Under Mentzelia dispersa)
Synonym
Mentzelia dispersa var. obtusa
(Under Mentzelia dispersa)
Synonym
Mentzelia eremophilaSOLITARY BLAZING STARNative
Mentzelia gracilentaNative
Mentzelia gracilenta
(Under Mentzelia pectinata var. chrysopetala)
Misapplied name
Mentzelia hirsutissimaHAIRY STICKLEAFNative
Mentzelia hirsutissima var. stenophylla
(Under Mentzelia hirsutissima)
Synonym
Mentzelia involucrataNative
Mentzelia involucrata var. involucrata
(Under Mentzelia involucrata)
Synonym
Mentzelia involucrata var. megalantha
(Under Mentzelia involucrata)
Synonym
Mentzelia inyoensisINYO BLAZING STARNative
Mentzelia jonesiiNative
Mentzelia laevicaulis var. laevicaulisNative
Mentzelia leucophylla
(Under Mentzelia oreophila)
Unabridged misapplied name
Mentzelia lindleyiNative
Mentzelia lindleyi subsp. crocea
(Under Mentzelia crocea)
Synonym
Mentzelia longiloba var. longilobaDUNE BLAZING STARNative
Mentzelia micranthaNative
Mentzelia monoensisMONO CRATERS BLAZING STARNative
Mentzelia montanaNative
Mentzelia multiflora subsp. longiloba
(Under Mentzelia longiloba var. longiloba)
Synonym
Mentzelia multiflora var. longiloba
(Under Mentzelia longiloba var. longiloba)
Synonym
Mentzelia nitensNative
Mentzelia obscuraNative
Mentzelia oreophilaARGUS BLAZING STARNative
Mentzelia pectinataNative
Mentzelia pectinata var. chrysopetalaOBISPO BLAZING STARNative
Mentzelia pectinata var. pectinataSAN JOAQUIN BLAZING STARNative
Mentzelia peirsonii
(Under Mentzelia tricuspis)
Synonym
Mentzelia pinetorum
(Under Mentzelia dispersa)
Synonym
Mentzelia politaPOLISHED BLAZING STARNative
Mentzelia pterospermaWING-SEED BLAZING STARNative
Mentzelia puberulaDARLINGTON'S BLAZING STARNative
Mentzelia raveniiNative
Mentzelia reflexaNative
Mentzelia torreyiTORREY'S BLAZING STARNative
Mentzelia tricuspisSPINY-HAIR BLAZING STARNative
Mentzelia tricuspis var. brevicornuta
(Under Mentzelia tridentata)
Synonym
Mentzelia tridentataCREAMY BLAZING STARNative
Mentzelia veatchianaNative
Menyanthaceae
  ↳  Key to Menyanthaceae
BUCKBEAN FAMILY
MenyanthesBUCKBEAN, BOGBEAN
Menyanthes trifoliataNative
Menziesia
Menziesia ferrugineaMOCK AZALEANative
MercurialisMERCURY
Mercurialis annuaNaturalized
Mertensia
  ↳  Key to Mertensia
BLUEBELL
Mertensia bellaOREGON LUNGWORTNative
Mertensia ciliata var. stomatechoidesSTREAMSIDE BLUEBELLNative
Mertensia cusickiiTOIYABE BLUEBELLSNative
Mertensia longifloraLONG BLUEBELLSNative
Mertensia oblongifoliaSAGEBRUSH BLUEBELLNative
Mertensia oblongifolia var. amoenaBEAUTIFUL SAGEBRUSH BLUEBELLSNative
Mertensia oblongifolia var. nevadensisNative
Mertensia oblongifolia var. oblongifoliaSAGEBRUSH BLUEBELLSNative
Mertensia toiyabensis
(Under Mertensia cusickii)
Synonym
Mesembryanthemum
  ↳  Key to Mesembryanthemum
ICEPLANT
Mesembryanthemum chilensis
(Under Carpobrotus chilensis)
Synonym
Mesembryanthemum cordifolium
(Under Aptenia cordifolia)
Synonym
Mesembryanthemum crystallinumCRYSTALLINE ICEPLANTNaturalized
Mesembryanthemum edule
(Under Carpobrotus edulis)
Synonym
Mesembryanthemum floribundum
(Under Drosanthemum floribundum)
Synonym
Mesembryanthemum litorale
(Under Delosperma litorale)
Synonym
Mesembryanthemum nodiflorumSLENDER-LEAVED ICEPLANTNaturalized
Mesembryanthemum pugioniforme
(Under Conicosia pugioniformis)
Synonym
Micranthes
  ↳  Key to Micranthes
SAXIFRAGE
Micranthes apricaNative
Micranthes bryophoraNative
Micranthes californicaNative
Micranthes ferrugineaNative
Micranthes fragosaNative
Micranthes howelliiHOWELL'S SAXIFRAGENative
Micranthes integrifoliaNative
Micranthes marshalliiNative
Micranthes nidificaNative
Micranthes odontolomaNative
Micranthes oreganaNative
Micranthes tolmieiNative
Microcala quadrangularis
(Under Cicendia quadrangularis)
Synonym
Micromonolepis
Micromonolepis pusillaDWARF MONOLEPISNative
Micropus
  ↳  Key to Micropus
Micropus amphibolusMOUNT DIABLO COTTONSEEDNative
Micropus californicusQ-TIPSNative
Micropus californicus var. californicusCOTTONTOPNative
Micropus californicus var. subvestitusNative
Microseris
  ↳  Key to Microseris
Microseris acuminataNative
Microseris bigeloviiNative
Microseris borealisNORTHERN MICROSERISNative
Microseris campestrisNative
Microseris decipiens
(Under Stebbinsoseris decipiens)
Synonym
Microseris douglasiiNative
Microseris douglasii subsp. douglasiiNative
Microseris douglasii subsp. platycarphaSMALL-FLOWERED MICROSERISNative
Microseris douglasii subsp. tenellaNative
Microseris elegansNative
Microseris heterocarpa
(Under Stebbinsoseris heterocarpa)
Synonym
Microseris howellii
(Under Microseris laciniata subsp. siskiyouensis)
Misapplied name
Microseris laciniataNative
Microseris laciniata subsp. detlingiiDETLING'S SILVERPUFFSNative
Microseris laciniata subsp. laciniataNative
Microseris laciniata subsp. leptosepalaNative
Microseris laciniata subsp. siskiyouensisNative
Microseris lindleyi
(Under Uropappus lindleyi)
Synonym
Microseris linearifolia
(Under Uropappus lindleyi)
Synonym
Microseris nutansNative
Microseris paludosaMARSH MICROSERISNative
Microseris sylvaticaSYLVAN MICROSERISNative
Microsteris
Microsteris gracilisNative
Microsteris gracilis subsp. gracilis
(Under Microsteris gracilis)
Synonym
Microsteris gracilis subsp. humilior
(Under Microsteris gracilis)
Synonym ined.
Microsteris gracilis subsp. humilior
(Under Microsteris gracilis)
Synonym ined.
Microsteris gracilis subsp. humilis
(Under Microsteris gracilis)
Synonym
Microsteris gracilis var. gracilis
(Under Microsteris gracilis)
Synonym
Microsteris gracilis var. humilior
(Under Microsteris gracilis)
Synonym
Milla capitata
(Under Dipterostemon capitatus)
Synonym
Milla capitata var. pauciflora
(Under Dipterostemon capitatus subsp. pauciflorus)
Synonym
Milla crocea
(Under Triteleia crocea)
Synonym
Milla grandiflora
(Under Triteleia grandiflora)
Synonym
Milla hyacinthina
(Under Triteleia hyacinthina)
Synonym
Milla hyacinthina var. lactea
(Under Triteleia hyacinthina)
Synonym
Milla laxa
(Under Triteleia laxa)
Synonym
Milla maritima
(Under Muilla maritima)
Synonym
Milla peduncularis
(Under Triteleia peduncularis)
Synonym
Milla uniflora
(Under Ipheion uniflorum)
Synonym
Miltitzia glandulifera
(Under Phacelia adenophora)
Synonym
Miltitzia glandulifera var. californica
(Under Phacelia adenophora)
Synonym
Miltitzia inyoensis
(Under Phacelia inyoensis)
Synonym
Miltitzia parviflora
(Under Phacelia inundata)
Synonym
Miltitzia pinnatifida
(Under Phacelia ivesiana)
Synonym
Miltitzia pusilla
(Under Phacelia tetramera)
Synonym
Miltitzia pusilla var. flagellaris
(Under Phacelia tetramera)
Synonym
MimetantheDOWNY MIMETANTHE, FALSE MONKEYFLOWER
Mimetanthe pilosaNative
MimulusMONKEYFLOWER
Mimulus acutidens
(Under Erythranthe acutidens)
Synonym
Mimulus alsinoides
(Under Erythranthe alsinoides)
Synonym
Mimulus androsaceus
(Under Erythranthe androsacea)
Synonym
Mimulus angustatus
(Under Diplacus angustatus)
Synonym
Mimulus angustifolius
(Under Diplacus mephiticus)
Synonym
Mimulus arenarius
(Under Erythranthe arenaria)
Synonym
Mimulus aridus
(Under Diplacus aridus)
Synonym
Mimulus arvensis
(Under Erythranthe arvensis)
Synonym
Mimulus aurantiacus
(Under Diplacus aurantiacus)
Synonym
Mimulus aurantiacus subsp. australis
(Under Diplacus australis)
Synonym
Mimulus aurantiacus var. aridus
(Under Diplacus aridus)
Synonym
Mimulus aurantiacus var. grandiflorus
(Under Diplacus grandiflorus)
Synonym
Mimulus aurantiacus var. parviflorus
(Under Diplacus parviflorus)
Synonym
Mimulus aurantiacus var. pubescens
(Under Diplacus longiflorus)
Synonym
Mimulus aurantiacus var. puniceus
(Under Diplacus puniceus)
Synonym
Mimulus bakeri
(Under Erythranthe nasuta)
Synonym
Mimulus barbatus
(Under Erythranthe barbata)
Synonym
Mimulus bicolor
(Under Erythranthe bicolor)
Synonym
Mimulus bifidus
(Under Diplacus grandiflorus)
Synonym
Mimulus bifidus subsp. fasciculatus
(Under Diplacus linearis)
Synonym
Mimulus bigelovii
(Under Diplacus bigelovii)
Synonym
Mimulus bigelovii var. cuspidatus
(Under Diplacus bigelovii var. cuspidatus)
Synonym
Mimulus bigelovii var. panamintensis
(Under Diplacus bigelovii var. cuspidatus)
Synonym
Mimulus biolettii
(Under Erythranthe filicaulis)
Synonym
Mimulus bolanderi
(Under Diplacus bolanderi)
Synonym
Mimulus brachiatus
(Under Diplacus layneae)
Synonym
Mimulus brandegeei
(Under Diplacus brandegeei)
Synonym
Mimulus breviflorus
(Under Erythranthe breviflora)
Synonym
Mimulus brevipes
(Under Diplacus brevipes)
Synonym
Mimulus breweri
(Under Erythranthe breweri)
Synonym
Mimulus caespitosus var. implexus
(Under Erythranthe tilingii)
Synonym
Mimulus cardinalis
(Under Erythranthe cardinalis)
Synonym
Mimulus cardinalis var. griseus
(Under Erythranthe cardinalis)
Synonym
Mimulus cardinalis var. rigens
(Under Erythranthe cardinalis)
Synonym
Mimulus clementinus
(Under Erythranthe guttata)
Synonym
Mimulus clevelandii
(Under Diplacus clevelandii)
Synonym
Mimulus coccineus
(Under Diplacus mephiticus)
Synonym
Mimulus coccineus var. wolfii
(Under Diplacus mephiticus)
Synonym
Mimulus congdonii
(Under Diplacus congdonii)
Synonym
Mimulus constrictus
(Under Diplacus constrictus)
Synonym
Mimulus corallinus
(Under Erythranthe corallina)
Synonym
Mimulus cordatus
(Under Erythranthe cordata)
Synonym
Mimulus crinitus
(Under Erythranthe moschata)
Synonym
Mimulus cupriphilus
(Under Erythranthe pardalis)
Synonym
Mimulus cuspidatus
(Under Erythranthe nasuta)
Synonym
Mimulus decurtatus
(Under Diplacus rattanii)
Synonym
Mimulus densus
(Under Diplacus mephiticus)
Synonym
Mimulus dentatus
(Under Erythranthe dentata)
Synonym
Mimulus diffusus
(Under Erythranthe diffusa)
Synonym
Mimulus discolor
(Under Erythranthe discolor)
Synonym
Mimulus discolor
(Under Erythranthe moschata)
Synonym
Mimulus douglasii
(Under Diplacus douglasii)
Synonym
Mimulus dudleyi
(Under Erythranthe geniculata)
Synonym
Mimulus equinus
(Under Erythranthe guttata)
Synonym
Mimulus erosus
(Under Erythranthe nasuta)
Synonym
Mimulus evanescens
(Under Erythranthe inflatula)
Synonym
Mimulus exiguus
(Under Erythranthe exigua)
Synonym
Mimulus filicaulis
(Under Erythranthe filicaulis)
Synonym
Mimulus filicifolius
(Under Erythranthe filicifolia)
Synonym
Mimulus flemingii
(Under Diplacus parviflorus)
Synonym
Mimulus floribundus
(Under Erythranthe floribunda)
Synonym
Mimulus floribundus var. geniculatus
(Under Erythranthe geniculata)
Synonym
Mimulus floribundus var. membranaceus
(Under Erythranthe floribunda)
Synonym
Mimulus fremontii
(Under Diplacus fremontii)
Synonym
Mimulus fremontii var. vandenbergensis
(Under Diplacus vandenbergensis)
Synonym
Mimulus geniculatus
(Under Erythranthe geniculata)
Synonym
Mimulus glabratus subsp. utahensis
(Under Erythranthe utahensis)
Synonym
Mimulus glabratus var. adscendens
(Under Erythranthe guttata)
Synonym
Mimulus glareosus
(Under Erythranthe microphylla)
Synonym
Mimulus glaucescens
(Under Erythranthe glaucescens)
Synonym
Mimulus glutinosus
(Under Diplacus aurantiacus)
Synonym
Mimulus glutinosus var. brachypus
(Under Diplacus longiflorus)
Synonym
Mimulus glutinosus var. linearis
(Under Diplacus linearis)
Synonym
Mimulus gracilipes
(Under Erythranthe gracilipes)
Synonym
Mimulus grandiflorus
(Under Erythranthe guttata)
Synonym
Mimulus grandis
(Under Erythranthe grandis)
Synonym
Mimulus grantianus
(Under Erythranthe diffusa)
Synonym
Mimulus grayi
(Under Erythranthe acutidens)
Synonym
Mimulus guttatus
(Under Erythranthe guttata)
Synonym
Mimulus guttatus subsp. arenicola
(Under Erythranthe arenicola)
Synonym
Mimulus guttatus subsp. arvensis
(Under Erythranthe arvensis)
Synonym
Mimulus guttatus subsp. haidensis
(Under Erythranthe guttata)
Synonym
Mimulus guttatus subsp. litoralis
(Under Erythranthe grandis)
Synonym
Mimulus guttatus subsp. micranthus
(Under Erythranthe arvensis)
Synonym
Mimulus guttatus var. arvensis
(Under Erythranthe arvensis)
Synonym
Mimulus guttatus var. cupriphilus
(Under Erythranthe pardalis)
Synonym
Mimulus guttatus var. depauperatus
(Under Erythranthe microphylla)
Synonym
Mimulus guttatus var. glaucescens
(Under Erythranthe glaucescens)
Synonym
Mimulus guttatus var. gracilis
(Under Erythranthe nasuta)
Synonym
Mimulus guttatus var. grandis
(Under Erythranthe grandis)
Synonym
Mimulus guttatus var. insignis
(Under Erythranthe microphylla)
Synonym
Mimulus guttatus var. microphyllus
(Under Erythranthe microphylla)
Synonym
Mimulus guttatus var. moschatus
(Under Erythranthe moschata)
Synonym
Mimulus guttatus var. nasutus
(Under Erythranthe nasuta)
Synonym
Mimulus guttatus var. pardalis
(Under Erythranthe pardalis)
Synonym
Mimulus guttatus var. puberulus
(Under Erythranthe guttata)
Synonym
Mimulus hirsutus
(Under Erythranthe guttata)
Synonym
Mimulus implexus
(Under Erythranthe tilingii)
Synonym
Mimulus implicatus
(Under Erythranthe tilingii)
Synonym
Mimulus inconspicuus
(Under Erythranthe inconspicua)
Synonym
Mimulus inconspicuus var. acutidens
(Under Erythranthe acutidens)
Synonym
Mimulus inconspicuus var. latidens
(Under Erythranthe latidens)
Synonym
Mimulus inflatulus
(Under Erythranthe inflatula)
Synonym
Mimulus jepsonii
(Under Diplacus jepsonii)
Synonym
Mimulus johnstonii
(Under Diplacus johnstonii)
Synonym
Mimulus kelloggii
(Under Diplacus kelloggii)
Synonym
Mimulus laciniatus
(Under Erythranthe laciniata)
Synonym
Mimulus langsdorffii
(Under Erythranthe guttata)
Synonym
Mimulus langsdorffii var. argutus
(Under Erythranthe guttata)
Synonym
Mimulus langsdorffii var. arvensis
(Under Erythranthe arvensis)
Synonym
Mimulus langsdorffii var. californicus
(Under Erythranthe guttata)
Synonym
Mimulus langsdorffii var. grandis
(Under Erythranthe grandis)
Synonym
Mimulus langsdorffii var. guttatus
(Under Erythranthe guttata)
Synonym
Mimulus langsdorffii var. insignis
(Under Erythranthe microphylla)
Synonym
Mimulus langsdorffii var. microphyllus
(Under Erythranthe microphylla)
Synonym
Mimulus langsdorffii var. minimus
(Under Erythranthe guttata)
Synonym
Mimulus langsdorffii var. nasutus
(Under Erythranthe nasuta)
Synonym
Mimulus langsdorffii var. platyphyllus
(Under Erythranthe guttata)
Synonym
Mimulus langsdorffii var. tilingii
(Under Erythranthe tilingii)
Synonym
Mimulus latidens
(Under Erythranthe latidens)
Synonym
Mimulus latifolius
(Under Diplacus brandegeei)
Synonym
Mimulus laxus
(Under Erythranthe microphylla)
Synonym
Mimulus layneae
(Under Diplacus layneae)
Synonym
Mimulus leibergii
(Under Erythranthe moschata)
Synonym
Mimulus leptaleus
(Under Diplacus leptaleus)
Synonym
Mimulus lewisii
(Under Erythranthe lewisii)
Synonym
Mimulus linearis
(Under Diplacus linearis)
Synonym
Mimulus longiflorus
(Under Diplacus longiflorus)
Synonym
Mimulus longiflorus subsp. calycinus
(Under Diplacus calycinus)
Synonym
Mimulus longiflorus var. linearis
(Under Diplacus linearis)
Synonym
Mimulus longiflorus var. rutilus
(Under Diplacus longiflorus)
Synonym
Mimulus longulus
(Under Erythranthe arvensis)
Synonym
Mimulus lucens
(Under Erythranthe tilingii)
Synonym
Mimulus luteus var. depauperatus
(Under Erythranthe microphylla)
Synonym
Mimulus luteus var. gracilis
(Under Erythranthe nasuta)
Synonym
Mimulus lyratus
(Under Erythranthe guttata)
Synonym
Mimulus maguirei
(Under Erythranthe cordata)
Synonym
Mimulus marmoratus
(Under Erythranthe marmorata)
Synonym
Mimulus membranaceus
(Under Erythranthe floribunda)
Synonym
Mimulus mephiticus
(Under Diplacus mephiticus)
Synonym
Mimulus micranthus
(Under Erythranthe arvensis)
Synonym
Mimulus microcarpus
(Under Diplacus jepsonii)
Synonym
Mimulus microphyllus
(Under Erythranthe microphylla)
Synonym
Mimulus minusculus
(Under Erythranthe corallina)
Synonym
Mimulus minusculus
(Under Erythranthe tilingii)
Synonym
Mimulus mohavensis
(Under Diplacus mohavensis)
Synonym
Mimulus moniliformis
(Under Erythranthe moschata)
Synonym
Mimulus montioides
(Under Erythranthe montioides)
Synonym
Mimulus moschatus
(Under Erythranthe moschata)
Synonym
Mimulus moschatus var. moniliformis
(Under Erythranthe moschata)
Synonym
Mimulus moschatus var. pallidiflorus
(Under Erythranthe moschata)
Synonym
Mimulus moschatus var. sessilifolius
(Under Erythranthe ptilota)
Synonym
Mimulus nanus
(Under Diplacus nanus)
Synonym
Mimulus nanus var. bicolor
(Under Diplacus bicolor)
Synonym
Mimulus nanus var. jepsonii
(Under Diplacus jepsonii)
Synonym
Mimulus nanus var. mephiticus
(Under Diplacus mephiticus)
Synonym
Mimulus nasutus
(Under Erythranthe nasuta)
Synonym
Mimulus nasutus var. insignis
(Under Erythranthe microphylla)
Synonym
Mimulus norrisii
(Under Erythranthe norrisii)
Synonym
Mimulus nudatus
(Under Erythranthe nudata)
Synonym
Mimulus palmeri
(Under Erythranthe palmeri)
Synonym
Mimulus palmeri var. androsaceus
(Under Erythranthe androsacea)
Synonym
Mimulus paniculatus
(Under Erythranthe guttata)
Synonym
Mimulus pardalis
(Under Erythranthe pardalis)
Synonym
Mimulus parishii
(Under Erythranthe parishii)
Synonym
Mimulus parryi
(Under Diplacus parryi)
Synonym
Mimulus peduncularis
(Under Erythranthe floribunda)
Synonym
Mimulus petiolaris
(Under Erythranthe guttata)
Synonym
Mimulus pictus
(Under Diplacus pictus)
Synonym
Mimulus pilosellus
(Under Erythranthe primuloides)
Synonym
Mimulus pilosus
(Under Mimetanthe pilosa)
Synonym
Mimulus platycalyx
(Under Erythranthe microphylla)
Synonym
Mimulus platylaemus
(Under Diplacus bolanderi)
Synonym
Mimulus primuloides
(Under Erythranthe primuloides)
Synonym
Mimulus primuloides subsp. linearifolius
(Under Erythranthe linearifolia)
Synonym
Mimulus primuloides var. linearifolius
(Under Erythranthe linearifolia)
Synonym
Mimulus primuloides var. minimus
(Under Erythranthe primuloides)
Synonym
Mimulus primuloides var. pilosellus
(Under Erythranthe primuloides)
Synonym
Mimulus prionophyllus
(Under Erythranthe guttata)
Synonym
Mimulus procerus
(Under Erythranthe grandis)
Synonym
Mimulus puberulus
(Under Erythranthe guttata)
Synonym
Mimulus pulchellus
(Under Diplacus pulchellus)
Synonym
Mimulus pulsiferae
(Under Erythranthe pulsiferae)
Synonym
Mimulus puncticalyx
(Under Erythranthe nasuta)
Synonym
Mimulus puniceus
(Under Diplacus puniceus)
Synonym
Mimulus purpureus
(Under Erythranthe purpurea)
Synonym
Mimulus purpureus var. pauxillus
(Under Erythranthe purpurea)
Synonym
Mimulus purpureus var. purpureus
(Under Erythranthe purpurea)
Synonym
Mimulus pygmaeus
(Under Diplacus pygmaeus)
Synonym
Mimulus rattanii
(Under Diplacus rattanii)
Synonym
Mimulus rattanii subsp. decurtatus
(Under Diplacus rattanii)
Synonym
Mimulus rattanii var. decurtatus
(Under Diplacus rattanii)
Synonym
Mimulus reifschneiderae
(Under Diplacus mephiticus)
Synonym
Mimulus ringensNative or naturalized
Mimulus rivularis
(Under Erythranthe guttata)
Synonym
Mimulus rubellus
(Under Erythranthe rubella)
Synonym
Mimulus rubellus var. breweri
(Under Erythranthe breweri)
Synonym
Mimulus rubellus var. latiflorus
(Under Erythranthe carsonensis)
Synonym
Mimulus rupicola
(Under Diplacus rupicola)
Synonym
Mimulus serotinus
(Under Erythranthe floribunda)
Synonym
Mimulus shevockii
(Under Erythranthe shevockii)
Synonym
Mimulus sookensis
(Under Erythranthe nasuta)
Synonym
Mimulus spissus
(Under Diplacus bigelovii var. cuspidatus)
Synonym
Mimulus stamineus
(Under Diplacus mephiticus)
Synonym
Mimulus subreniformis
(Under Erythranthe nasuta)
Synonym
Mimulus subsecundus
(Under Diplacus fremontii)
Synonym
Mimulus subsecundus var. constrictus
(Under Diplacus constrictus)
Synonym
Mimulus suksdorfii
(Under Erythranthe suksdorfii)
Synonym
Mimulus tilingii
(Under Erythranthe tilingii)
Synonym
Mimulus tilingii var. corallinus
(Under Erythranthe corallina)
Synonym
Mimulus tolmiei
(Under Diplacus nanus)
Synonym
Mimulus torreyi
(Under Diplacus torreyi)
Synonym
Mimulus traskiae
(Under Diplacus traskiae)
Synonym
Mimulus tricolor
(Under Diplacus tricolor)
Synonym
Mimulus veronicifolius
(Under Erythranthe tilingii)
Synonym
Mimulus viscidus
(Under Diplacus viscidus)
Synonym
Mimulus viscidus subsp. constrictus
(Under Diplacus constrictus)
Synonym
Mimulus viscidus var. compactus
(Under Diplacus compactus)
Synonym
Mimulus washoensis
(Under Diplacus mephiticus)
Synonym
Mimulus whitneyi
(Under Diplacus bicolor)
Synonym
Mimulus wolfii
(Under Diplacus mephiticus)
Synonym
Minuartia biflora
(Under Cherleria biflora)
Synonym
Minuartia californica
(Under Sabulina californica)
Synonym
Minuartia cismontana
(Under Sabulina cismontana)
Synonym
Minuartia decumbens
(Under Sabulina decumbens)
Synonym
Minuartia douglasii
(Under Sabulina douglasii)
Synonym
Minuartia howellii
(Under Sabulina howellii)
Synonym
Minuartia nuttallii
(Under Sabulina nuttallii)
Synonym
Minuartia nuttallii subsp. fragilis
(Under Sabulina nuttallii var. fragilis)
Synonym
Minuartia nuttallii subsp. gregaria
(Under Sabulina nuttallii var. gregaria)
Synonym
Minuartia nuttallii var. fragilis
(Under Sabulina nuttallii var. fragilis)
Synonym
Minuartia nuttallii var. gracilis
(Under Sabulina nuttallii var. gracilis)
Synonym
Minuartia nuttallii var. gregaria
(Under Sabulina nuttallii var. gregaria)
Synonym
Minuartia obtusiloba
(Under Cherleria biflora)
Misapplied name
Minuartia pusilla
(Under Sabulina pusilla)
Synonym
Minuartia rosei
(Under Sabulina rosei)
Synonym
Minuartia rubella
(Under Sabulina rubella)
Synonym
Minuartia stolonifera
(Under Sabulina stolonifera)
Synonym
Minuartia stricta
(Under Sabulina stricta)
Synonym
Mirabilis
  ↳  Key to Mirabilis
FOUR O'CLOCK
Mirabilis albidaNative
Mirabilis alipesNative
Mirabilis aspera
(Under Mirabilis laevis var. villosa)
Synonym
Mirabilis bigelovii
(Under Mirabilis laevis var. villosa)
Synonym
Mirabilis bigelovii var. aspera
(Under Mirabilis laevis var. villosa)
Synonym
Mirabilis bigelovii var. bigelovii
(Under Mirabilis laevis var. villosa)
Synonym
Mirabilis bigelovii var. retrorsa
(Under Mirabilis laevis var. retrorsa)
Synonym
Mirabilis californica
(Under Mirabilis laevis var. crassifolia)
Synonym
Mirabilis californica var. californica
(Under Mirabilis laevis var. crassifolia)
Synonym
Mirabilis californica var. cedrosensis
(Under Mirabilis laevis var. crassifolia)
Synonym
Mirabilis californica var. cordifolia
(Under Mirabilis laevis var. crassifolia)
Illegitimate name
Mirabilis coccineaRED FOUR O'CLOCKNative
Mirabilis comata
(Under Mirabilis albida)
Synonym
Mirabilis froebelii
(Under Mirabilis multiflora var. pubescens)
Synonym
Mirabilis froebelii var. glabrata
(Under Mirabilis multiflora var. pubescens)
Synonym
Mirabilis glandulosa
(Under Mirabilis multiflora var. glandulosa)
Synonym
Mirabilis greeneiGREENE'S FOUR O'CLOCKNative
Mirabilis jalapa var. jalapaNaturalized
Mirabilis laevisNative
Mirabilis laevis var. crassifoliaWISHBONE BUSHNative
Mirabilis laevis var. retrorsaNative
Mirabilis laevis var. villosaNative
Mirabilis linearis var. linearisNaturalized
Mirabilis multifloraNative
Mirabilis multiflora var. glandulosaNative
Mirabilis multiflora var. pubescensNative
Mirabilis nyctagineaWaif
Mirabilis oblongifolia
(Under Mirabilis albida)
Synonym
Mirabilis pumila
(Under Mirabilis albida)
Synonym
Mirabilis retrorsa
(Under Mirabilis laevis var. retrorsa)
Synonym
Mirabilis tenuilobaSLENDER-LOBED FOUR O'CLOCKNative
Misopates orontium
(Under Antirrhinum orontium)
Synonym
Mitella breweri
(Under Pectiantia breweri)
Synonym
Mitella caulescens
(Under Mitellastra caulescens)
Synonym
Mitella diversifolia
(Under Ozomelis diversifolia)
Synonym
Mitella ovalis
(Under Pectiantia ovalis)
Synonym
Mitella pentandra
(Under Pectiantia pentandra)
Synonym
Mitella trifida
(Under Ozomelis trifida)
Synonym
Mitellastra
Mitellastra caulescensNative
Modiola
Modiola carolinianaMODIOLANaturalized
Moehringia
Moehringia macrophyllaLARGE-LEAVED SANDWORTNative
Moenchia
Moenchia erecta subsp. erectaUPRIGHT CHICKWEEDNaturalized
Mohavea breviflora
(Under Antirrhinum mohavea)
Synonym
Mohavea confertiflora
(Under Antirrhinum confertiflorum)
Synonym
Molluginaceae
  ↳  Key to Molluginaceae
CARPET-WEED FAMILY
Mollugo
  ↳  Key to Mollugo
CARPET-WEED
Mollugo cervianaNaturalized
Mollugo verticillataNaturalized
MoluccellaSHELL FLOWER
Moluccella laevisHistorical waif
Monanthochloe littoralis
(Under Distichlis littoralis)
Synonym
MonardaBEE BALM
Monarda pectinataPLAINS BEE BALMNative
Monardella
  ↳  Key to Monardella
Monardella anemonoides
(Under Monardella linoides subsp. anemonoides)
Synonym
Monardella antonina
(Under Monardella villosa subsp. villosa)
Synonym
Monardella antonina subsp. antonina
(Under Monardella villosa subsp. villosa)
Synonym
Monardella antonina subsp. benitensis
(Under Monardella villosa subsp. villosa)
Synonym
Monardella australisNative
Monardella australis subsp. australisNative
Monardella australis subsp. cinereaGRAY MONARDELLANative
Monardella australis subsp. jokerstiiJOKERST'S MONARDELLANative
Monardella beneolensSWEET-SMELLING MONARDELLANative
Monardella boydiiNative
Monardella breweriNative
Monardella breweri subsp. breweriNative
Monardella breweri subsp. glanduliferaNative
Monardella breweri subsp. lanceolataMUSTANG MINTNative
Monardella breweri subsp. microcephalaNative
Monardella candicansSIERRA MONARDELLANative
Monardella candicans var. exilis
(Under Monardella exilis)
Synonym
Monardella candicans var. venosa
(Under Monardella venosa)
Synonym
Monardella cinerea
(Under Monardella australis subsp. cinerea)
Synonym
Monardella crispa
(Under Monardella undulata subsp. crispa)
Synonym
Monardella douglasiiNative
Monardella douglasii subsp. venosa
(Under Monardella venosa)
Synonym
Monardella douglasii var. parryi
(Under Monardella venosa)
Synonym
Monardella douglasii var. venosa
(Under Monardella venosa)
Synonym
Monardella eremicolaNative
Monardella exilisNative
Monardella follettiiFOLLETT'S MONARDELLANative
Monardella franciscana
(Under Monardella villosa subsp. franciscana)
Synonym
Monardella frutescens
(Under Monardella undulata subsp. undulata)
Synonym
Monardella glauca
(Under Monardella odoratissima subsp. glauca)
Synonym
Monardella hypoleucaNative
Monardella hypoleuca subsp. hypoleucaNative
Monardella hypoleuca subsp. intermediaNative
Monardella hypoleuca subsp. lanataFELT-LEAVED MONARDELLANative
Monardella hypoleuca var. saxicola
(Under Monardella saxicola)
Synonym
Monardella lanata
(Under Monardella hypoleuca subsp. lanata)
Synonym
Monardella lanceolata
(Under Monardella breweri subsp. glandulifera)
Synonym, in part
Monardella lanceolata
(Under Monardella breweri subsp. lanceolata)
Synonym
Monardella lanceolata
(Under Monardella breweri subsp. microcephala)
Synonym, in part
Monardella lanceolata var. glandulifera
(Under Monardella breweri subsp. glandulifera)
Synonym
Monardella lanceolata var. microcephala
(Under Monardella breweri subsp. microcephala)
Synonym
Monardella lanceolata var. sanguinea
(Under Monardella breweri subsp. lanceolata)
Synonym
Monardella ledifolia
(Under Monardella viridis)
Synonym
Monardella leucocephalaMERCED MONARDELLANative
Monardella linoidesNative
Monardella linoides subsp. anemonoidesNative
Monardella linoides subsp. erectaNative
Monardella linoides subsp. linoidesNative
Monardella linoides subsp. linoides
(Under Monardella linoides subsp. anemonoides)
Synonym, in part
Monardella linoides subsp. oblongaTEHACHAPI MONARDELLANative
Monardella linoides subsp. sierraeNative
Monardella linoides subsp. viminea
(Under Monardella viminea)
Synonym
Monardella linoides var. anemonoides
(Under Monardella linoides subsp. anemonoides)
Synonym
Monardella linoides var. oblonga
(Under Monardella linoides subsp. oblonga)
Synonym
Monardella linoides var. viminea
(Under Monardella viminea)
Synonym
Monardella macranthaNative
Monardella macrantha subsp. halliiHALL'S MONARDELLANative
Monardella macrantha subsp. macranthaNative
Monardella macrantha var. hallii
(Under Monardella macrantha subsp. hallii)
Synonym
Monardella macrantha var. pinetorum
(Under Monardella nana)
Synonym
Monardella mojavensisNative
Monardella nanaNative
Monardella nana subsp. arida
(Under Monardella nana)
Synonym
Monardella nana subsp. leptosiphon
(Under Monardella nana)
Synonym
Monardella nana subsp. tenuiflora
(Under Monardella nana)
Synonym
Monardella neglecta
(Under Monardella purpurea)
Synonym
Monardella oblonga
(Under Monardella linoides subsp. oblonga)
Synonym
Monardella odoratissimaCOYOTE-MINTNative
Monardella odoratissima subsp. australis
(Under Monardella australis subsp. australis)
Synonym
Monardella odoratissima subsp. glaucaNative
Monardella odoratissima subsp. glauca
(Under Monardella follettii)
Unabridged synonym, in part
Monardella odoratissima subsp. pallidaNative
Monardella odoratissima var. follettii
(Under Monardella follettii)
Synonym
Monardella odoratissima var. glauca
(Under Monardella odoratissima subsp. glauca)
Synonym
Monardella odoratissima var. neglecta
(Under Monardella purpurea)
Synonym
Monardella odoratissima var. ovata
(Under Monardella odoratissima)
Synonym
Monardella odoratissima var. ovata
(Under Monardella odoratissima subsp. glauca)
Synonym
Monardella ovata
(Under Monardella odoratissima)
Synonym
Monardella ovata
(Under Monardella odoratissima subsp. glauca)
Synonym
Monardella pallida
(Under Monardella odoratissima subsp. pallida)
Synonym
Monardella palmeriPALMER'S MONARDELLANative
Monardella peninsularis
(Under Monardella breweri subsp. microcephala)
Synonym
Monardella pringleiPRINGLE'S MONARDELLANative
Monardella purpureaSISKIYOU MONARDELLANative
Monardella reflexa
(Under Monardella villosa subsp. villosa)
Synonym
Monardella robisoniiROBISON'S MONARDELLANative
Monardella robusta
(Under Monardella hypoleuca subsp. hypoleuca)
Synonym
Monardella saxicolaROCK MONARDELLANative
Monardella sheltoniiNative
Monardella sinuataNative
Monardella sinuata subsp. nigrescensNative
Monardella sinuata subsp. sinuataNative
Monardella siskiyouensis
(Under Monardella villosa subsp. villosa)
Synonym
Monardella stebbinsiiSTEBBINS' MONARDELLANative
Monardella stoneanaJENNIFER'S MONARDELLANative
Monardella undulataNative
Monardella undulata
(Under Monardella sinuata)
Misapplied name
Monardella undulata subsp. arguelloensisNative
Monardella undulata subsp. crispaCRISP MONARDELLANative
Monardella undulata subsp. undulataSAN LUIS OBISPO MONARDELLANative
Monardella undulata var. crispa
(Under Monardella undulata subsp. crispa)
Synonym
Monardella undulata var. frutescens
(Under Monardella undulata subsp. undulata)
Synonym
Monardella venosaVEINY MONARDELLANative
Monardella villosaCOYOTE-MINTNative
Monardella villosa subsp. franciscanaNative
Monardella villosa subsp. globosa
(Under Monardella villosa subsp. villosa)
Synonym
Monardella villosa subsp. neglecta
(Under Monardella purpurea)
Synonym
Monardella villosa subsp. obispoensisNative
Monardella villosa subsp. sheltonii
(Under Monardella sheltonii)
Synonym
Monardella villosa subsp. subserrata
(Under Monardella villosa subsp. villosa)
Synonym
Monardella villosa subsp. villosaNative
Monardella villosa var. franciscana
(Under Monardella villosa subsp. franciscana)
Synonym
Monardella villosa var. neglecta
(Under Monardella purpurea)
Synonym
Monardella villosa var. obispoensis
(Under Monardella villosa subsp. obispoensis)
Synonym
Monardella villosa var. sheltonii
(Under Monardella sheltonii)
Synonym
Monardella vimineaWILLOWY MONARDELLANative
Monardella viridisGREEN MONARDELLANative
Monardella viridis subsp. saxicola
(Under Monardella saxicola)
Synonym
Monerma cylindrica
(Under Hainardia cylindrica)
Synonym
Moneses
Moneses unifloraWOODNYMPHNative
Moneses uniflora var. reticulata
(Under Moneses uniflora)
Synonym
Monochoria
Monochoria vaginalisNaturalized
Monolepis
  ↳  Key to Monolepis
POVERTY WEED
Monolepis nuttallianaNUTTALL'S POVERTY WEEDNative
Monolepis pusilla
(Under Micromonolepis pusilla)
Synonym
Monolepis spathulataNative
Monolopia
  ↳  Key to Monolopia
HILLSIDE DAISY
Monolopia bahiifolia
(Under Pseudobahia bahiifolia)
Synonym
Monolopia bahiifolia var. pinnatifida
(Under Pseudobahia heermannii)
Synonym
Monolopia congdoniiSAN JOAQUIN WOOLLYTHREADSNative
Monolopia gracilensWOODLAND WOOLLYTHREADSNative
Monolopia lanceolataCOMMON HILLSIDE DAISYNative
Monolopia majorNative
Monolopia strictaNative
Monoptilon
  ↳  Key to Monoptilon
DESERT STAR
Monoptilon bellidiformeNative
Monoptilon bellioidesNative
Monothrix intricata
(Under Laphamia intricata)
Synonym
Monothrix megalocephala
(Under Laphamia megalocephala var. megalocephala)
Synonym
Monotropa
  ↳  Key to Monotropa
Monotropa hypopitysPINESAPNative
Monotropa unifloraGHOST-PIPENative
Montia
  ↳  Key to Montia
Montia alpina
(Under Claytonia nevadensis)
Synonym
Montia chamissoiTOAD LILYNative
Montia cordifolia
(Under Claytonia cordifolia)
Synonym
Montia dichotomaNative
Montia diffusaNative
Montia fontanaWATER CHICKWEED, BLINKSNative
Montia fontana subsp. amporitana
(Under Montia fontana)
Synonym
Montia fontana subsp. chondrosperma
(Under Montia fontana)
Synonym
Montia fontana subsp. variabilis
(Under Montia fontana)
Synonym
Montia funstonii
(Under Montia fontana)
Synonym
Montia gypsophiloides
(Under Claytonia gypsophiloides)
Synonym
Montia hallii
(Under Montia fontana)
Synonym
Montia howelliiHOWELL'S MONTIANative
Montia linearisNative
Montia parvifoliaNative
Montia perfoliata
(Under Claytonia perfoliata subsp. perfoliata)
Synonym
Montia perfoliata f. glauca
(Under Claytonia exigua subsp. glauca)
Synonym
Montia perfoliata f. parviflora
(Under Claytonia parviflora subsp. utahensis)
Synonym
Montia perfoliata f. parvifolia
(Under Claytonia parviflora subsp. parviflora)
Synonym
Montia perfoliata var. depressa
(Under Claytonia rubra subsp. depressa)
Synonym
Montia perfoliata var. glauca
(Under Claytonia exigua subsp. glauca)
Synonym
Montia perfoliata var. utahensis
(Under Claytonia parviflora subsp. utahensis)
Synonym
Montia rosulata
(Under Claytonia exigua subsp. exigua)
Synonym
Montia saxosa
(Under Claytonia saxosa)
Synonym
Montia sibirica
(Under Claytonia sibirica)
Synonym
Montia spathulata
(Under Claytonia exigua subsp. exigua)
Synonym
Montia spathulata var. exigua
(Under Claytonia exigua subsp. exigua)
Synonym
Montia spathulata var. rosulata
(Under Claytonia exigua subsp. exigua)
Synonym
Montia spathulata var. spathulata
(Under Claytonia exigua subsp. exigua)
Synonym
Montia spathulata var. tenuifolia
(Under Claytonia parviflora subsp. viridis)
Synonym
Montia spathulata var. viridis
(Under Claytonia parviflora subsp. viridis)
Synonym
Montia verna
(Under Montia fontana)
Synonym
Montiaceae
  ↳  Key to Montiaceae
MINER'S LETTUCE FAMILY
Moraceae
  ↳  Key to Moraceae
MULBERRY FAMILY
Morella
Morella californicaWAX MYRTLENative
Mortonia
Mortonia utahensisUTAH MORTONIANative
MorusMULBERRY
Morus albaWHITE MULBERRYNaturalized
Mucronea
  ↳  Key to Mucronea
Mucronea californicaCALIFORNIA SPINEFLOWERNative
Mucronea californica var. suksdorfii
(Under Mucronea californica)
Synonym
Mucronea perfoliataPERFOLIATE SPINEFLOWERNative
Mucronea perfoliata var. opaca
(Under Mucronea perfoliata)
Synonym
Muehlenbeckia
  ↳  Key to Muehlenbeckia
Muehlenbeckia complexaMAIDENHAIR VINENaturalized
Muehlenbeckia hastatula
(Under Muehlenbeckia hastulata)
Orthographic variant
Muehlenbeckia hastulataWIREVINENaturalized
Muehlenbeckia hastulata var. fascicularis
(Under Muehlenbeckia hastulata)
Synonym
Muehlenbeckia hastulata var. hastulata
(Under Muehlenbeckia hastulata)
Synonym
Muehlenbeckia hastulata var. rotundata
(Under Muehlenbeckia hastulata)
Synonym
Muhlenbergia
  ↳  Key to Muhlenbergia
MUHLY
Muhlenbergia alopecuroidesWOLFTAILNative
Muhlenbergia andinaFOXTAIL MUHLYNative
Muhlenbergia appressaAPPRESSED MUHLYNative
Muhlenbergia arseneiTOUGH MUHLYNative
Muhlenbergia asperifoliaSCRATCH GRASSNative
Muhlenbergia californicaCALIFORNIA MUHLYNative
Muhlenbergia emersleyiBULLGRASSNative
Muhlenbergia filiformisPULL-UP MUHLYNative
Muhlenbergia fragilisDELICATE MUHLYNative
Muhlenbergia jonesiiJONES' MUHLYNative
Muhlenbergia mexicanaNative
Muhlenbergia microspermaLITTLESEED MUHLYNative
Muhlenbergia minutissimaNative
Muhlenbergia montanaMOUNTAIN MUHLYNative
Muhlenbergia paucifloraFEW-FLOWERED MUHLYNative
Muhlenbergia porteriNative
Muhlenbergia richardsonisMAT MUHLYNative
Muhlenbergia rigensDEER GRASSNative
Muhlenbergia schreberiNIMBLEWELLWaif
Muhlenbergia utilisAPAREJO GRASSNative
Muilla
  ↳  Key to Muilla
Muilla clevelandii
(Under Bloomeria clevelandii)
Synonym
Muilla coronataCROWNED MUILLANative
Muilla maritimaCOMMON MUILLANative
Muilla serotina
(Under Muilla maritima)
Synonym
Muilla tenuis
(Under Muilla maritima)
Synonym
Muilla transmontanaNative
Mulgedium oblongifolium
(Under Lactuca tatarica subsp. pulchella)
Synonym
Mulgedium pulchellum
(Under Lactuca tatarica subsp. pulchella)
Illegitimate name
Munroa
Munroa squarrosaFALSE BUFFALOGRASSNative
Munzothamnus
Munzothamnus blairiiBLAIR'S MUNZOTHAMNUSNative
Mycelis
Mycelis muralisWALL-LETTUCENaturalized
Myoporum
Myoporum laetumMYOPORUM, NGAIO TREENaturalized
Myosotis
  ↳  Key to Myosotis
FORGET-ME-NOT
Myosotis discolorCHANGING FORGET-ME-NOTNaturalized
Myosotis latifoliaBROADLEAVED FORGET-ME-NOTNaturalized
Myosotis laxaBAY FORGET-ME-NOTNative
Myosotis micranthaSMALL-FLOWERED FORGET-ME-NOTNaturalized
Myosotis palustris
(Under Myosotis scorpioides)
Synonym
Myosotis scorpioidesWATER FORGET-ME-NOTNaturalized
Myosotis stricta
(Under Myosotis micrantha)
Synonym
Myosotis vernaEARLY FORGET-ME-NOTWaif
Myosotis versicolor
(Under Myosotis discolor)
Synonym
Myosotis virginica
(Under Myosotis verna)
Synonym
Myosurus
  ↳  Key to Myosurus
MOUSETAIL
Myosurus apetalusNative
Myosurus apetalus var. borealisNative
Myosurus apetalus var. montanusNative
Myosurus aristatus
(Under Myosurus apetalus var. borealis)
Illegitimate name
Myosurus aristatus subsp. montanus
(Under Myosurus apetalus var. montanus)
Synonym
Myosurus cupulatusNative
Myosurus lepturus
(Under Myosurus minimus)
Synonym
Myosurus lepturus var. filiformis
(Under Myosurus minimus)
Synonym
Myosurus minimusNative
Myosurus minimus subsp. major
(Under Myosurus minimus)
Synonym
Myosurus minimus subsp. montanus
(Under Myosurus apetalus var. montanus)
Synonym
Myosurus minimus var. filiformis
(Under Myosurus minimus)
Synonym
Myosurus minimus var. major
(Under Myosurus minimus)
Synonym
Myosurus minimus var. sessiliflorus
(Under Myosurus sessilis)
Synonym
Myosurus sessilisNative
Myrica
Myrica californica
(Under Morella californica)
Synonym
Myrica hartwegiiSIERRA SWEET BAYNative
Myricaceae
  ↳  Key to Myricaceae
WAX MYRTLE FAMILY
Myriophyllum
  ↳  Key to Myriophyllum
WATER-MILFOIL
Myriophyllum aquaticumPARROT'S FEATHERNaturalized
Myriophyllum brasiliense
(Under Myriophyllum aquaticum)
Synonym
Myriophyllum elatinoides
(Under Myriophyllum quitense)
Synonym
Myriophyllum exalbescens
(Under Myriophyllum sibiricum)
Synonym
Myriophyllum hippuroidesWESTERN WATER-MILFOILNative
Myriophyllum proserpinacoides
(Under Myriophyllum aquaticum)
Synonym
Myriophyllum quitenseANDEAN WATER-MILFOILNative
Myriophyllum sibiricumSIBERIAN WATER-MILFOILNative
Myriophyllum spicatumEURASIAN WATER-MILFOILNaturalized
Myriophyllum spicatum subsp. exalbescens
(Under Myriophyllum sibiricum)
Synonym
Myriophyllum spicatum var. exalbescens
(Under Myriophyllum sibiricum)
Synonym
Myriophyllum verticillatumWHORLED WATER-MILFOILNative
Myriopteris
  ↳  Key to Myriopteris
Myriopteris clevelandiiCLEVELAND'S LIP FERNNative
Myriopteris cooperaeCOOPER'S LIP FERNNative
Myriopteris covilleiCOVILLE'S LIP FERNNative
Myriopteris gracilisSLENDER LIP FERNNative
Myriopteris gracillimaLACE LIP FERNNative
Myriopteris intertextaCOASTAL LIP FERNNative
Myriopteris newberryiNEWBERRY'S LIP FERNNative
Myriopteris parryiPARRY'S LIP FERNNative
Myriopteris viscidaVISCID LACE FERNNative
Myriopteris wootoniiWOOTON'S LIP FERNNative
MyrsinaceaeMYRSINE FAMILY
Myrtaceae
  ↳  Key to Myrtaceae
MYRTLE FAMILY
Myrtus
Myrtus communisMYRTLEWaif
Najas
  ↳  Key to Najas
Najas flexilisSLENDER WATER-NYMPHNative
Najas gracillimaTHREAD-LEAVED WATER-NYMPHNaturalized
Najas gramineaRICE-FIELD WATER-NYMPHAgricultural weed
Najas guadalupensis subsp. guadalupensisCOMMON WATER-NYMPHNative
Najas marinaHOLLY-LEAVED WATER-NYMPHNative
Nama
  ↳  Key to Nama
PURPLE MAT
Nama aretioidesNative
Nama aretioides var. californicaNative
Nama aretioides var. multifloraNative
Nama californicaNative
Nama demissaNative
Nama demissa var. covilleiNative
Nama demissa var. demissaNative
Nama demissa var. deserti
(Under Nama demissa var. demissa)
Synonym
Nama densaNative
Nama densa var. densaNative
Nama densa var. parvifloraNative
Nama depressaNative
Nama dichotoma var. dichotomaFORKED PURPLE MATNative
Nama hispida var. revoluta
(Under Nama hispida var. spathulata)
Synonym
Nama hispida var. spathulataNative
Nama lobbii
(Under Eriodictyon lobbii)
Synonym
Nama pusillaNative
Nama racemosum
(Under Phacelia racemosa)
Synonym
Nama rothrockiiNative
Nama stenocarpaMUD NAMANative
Nama systyla
(Under Draperia systyla)
Synonym
Namaceae
  ↳  Key to Namaceae
NAMA FAMILY
Narcissus
  ↳  Key to Narcissus
Narcissus pseudonarcissusDAFFODILNaturalized
Narcissus tazettaPAPER WHITENaturalized
NartheciaceaeBOG ASPHODEL FAMILY
NartheciumBOG ASPHODEL
Narthecium californicumNative
Nassella cernua
(Under Stipa cernua)
Synonym
Nassella formicara
(Under Stipa manicata)
Misapplied name
Nassella formicarum
(Under Stipa manicata)
Misapplied name
Nassella lepida
(Under Stipa lepida)
Synonym
Nassella lepida var. lepida
(Under Stipa lepida)
Synonym
Nassella manicata
(Under Stipa manicata)
Synonym
Nassella pulchra
(Under Stipa pulchra)
Synonym
Nasturtium
  ↳  Key to Nasturtium
Nasturtium gambeliiGAMBEL'S WATER CRESSNative
Nasturtium officinaleWATER CRESSNative
Navarretia
  ↳  Key to Navarretia
NAVARRETIA
Navarretia atractyloidesNative
Navarretia bakeri
(Under Navarretia leucocephala subsp. bakeri)
Synonym
Navarretia breweriNative
Navarretia capillarisNative
Navarretia cotulifoliaCOTULA NAVARRETIANative
Navarretia divaricataMOUNTAIN NAVARRETIANative
Navarretia divaricata subsp. divaricataNative
Navarretia divaricata subsp. vividiorNative
Navarretia eriocephalaHOARY NAVARRETIANative
Navarretia filicaulisNative
Navarretia fossalisSPREADING NAVARRETIANative
Navarretia goweniiLIME RIDGE NAVARRETIANative
Navarretia hamataNative
Navarretia hamata subsp. foliacea
(Under Navarretia atractyloides)
Synonym
Navarretia hamata subsp. hamataNative
Navarretia hamata subsp. leptanthaNative
Navarretia hamata subsp. parvilobaNative
Navarretia heterandraTEHAMA NAVARRETIANative
Navarretia heterodoxaNative
Navarretia heterodoxa subsp. rosulata
(Under Navarretia rosulata)
Synonym
Navarretia intertextaNative
Navarretia intertexta subsp. intertexta
(Under Navarretia intertexta)
Synonym
Navarretia intertexta subsp. intertexta
(Under Navarretia paradoxiclara)
Synonym, in part
Navarretia intertexta subsp. intertexta
(Under Navarretia paradoxinota)
Synonym, in part
Navarretia intertexta subsp. propinqua
(Under Navarretia propinqua)
Synonym
Navarretia jaredii
(Under Navarretia mitracarpa)
Synonym
Navarretia jepsoniiJEPSON'S NAVARRETIANative
Navarretia leptaleaNative
Navarretia leptalea subsp. bicolorNative
Navarretia leptalea subsp. leptaleaNative
Navarretia leucocephalaNative
Navarretia leucocephala subsp. bakeriBAKER'S NAVARRETIANative
Navarretia leucocephala subsp. leucocephalaNative
Navarretia leucocephala subsp. minimaNative
Navarretia leucocephala subsp. paucifloraFEW-FLOWERED NAVARRETIANative
Navarretia leucocephala subsp. plieanthaMANY-FLOWERED NAVARRETIANative
Navarretia linearifoliaNative
Navarretia linearifolia subsp. linearifoliaNative
Navarretia linearifolia subsp. pinnatisectaPINNATE-LEAVED NAVARRETIANative
Navarretia mellitaNative
Navarretia minima
(Under Navarretia leucocephala subsp. minima)
Synonym
Navarretia mitracarpaNative
Navarretia mitracarpa subsp. jaredii
(Under Navarretia mitracarpa)
Synonym
Navarretia myersiiNative
Navarretia myersii subsp. deminutaSMALL PINCUSHION NAVARRETIANative
Navarretia myersii subsp. myersiiPINCUSHION NAVARRETIANative
Navarretia nigelliformisNative
Navarretia nigelliformis subsp. nigelliformisADOBE NAVARRETIANative
Navarretia nigelliformis subsp. radiansSHINING NAVARRETIANative
Navarretia nigelliformis var. radians
(Under Navarretia nigelliformis subsp. radians)
Synonym
Navarretia ojaiensisOJAI NAVARRETIANative
Navarretia paradoxiclaraNative
Navarretia paradoxinotaNative
Navarretia pauciflora
(Under Navarretia leucocephala subsp. pauciflora)
Synonym
Navarretia peninsularisBAJA NAVARRETIANative
Navarretia plieantha
(Under Navarretia leucocephala subsp. plieantha)
Synonym
Navarretia proliferaNative
Navarretia prolifera subsp. luteaYELLOW BUR NAVARRETIANative
Navarretia prolifera subsp. proliferaNative
Navarretia propinquaNative
Navarretia prostrataPROSTRATE VERNAL POOL NAVARRETIANative
Navarretia pubescensNative
Navarretia rosulataMARIN COUNTY NAVARRETIANative
Navarretia setilobaPIUTE MOUNTAINS NAVARRETIANative
Navarretia sinistraNative
Navarretia sinistra subsp. pinnatisecta
(Under Navarretia linearifolia subsp. pinnatisecta)
Synonym
Navarretia sinistra subsp. sinistra
(Under Navarretia linearifolia)
Synonym, in part
Navarretia sinistra subsp. sinistra
(Under Navarretia linearifolia subsp. linearifolia)
Synonym, in part
Navarretia sinistra subsp. sinistra
(Under Navarretia sinistra)
Synonym
Navarretia squarrosaSKUNKWEEDNative
Navarretia subuligeraAWL-LEAVED NAVARRETIANative
Navarretia tagetinaMARIGOLD NAVARRETIANative
Navarretia viscidulaNative
Neltuma
  ↳  Key to Neltuma
Neltuma odorataHONEY MESQUITENative
Neltuma velutinaVELVET MESQUITENaturalized
NemacaulisCOTTONHEADS
Nemacaulis denudata
  ↳  Key to Nemacaulis denudata
Native
Nemacaulis denudata var. denudataCOAST WOOLLY-HEADSNative
Nemacaulis denudata var. gracilisSLENDER COTTONHEADSNative
Nemacaulis nuttallii
(Under Nemacaulis denudata var. denudata)
Illegitimate name
Nemacladus
  ↳  Key to Nemacladus
Nemacladus adenophorus
(Under Nemacladus rubescens)
Synonym
Nemacladus calcaratusCHIMNEY CREEK NEMACLADUSNative
Nemacladus californicusNative
Nemacladus capillarisNative
Nemacladus glanduliferusNative
Nemacladus glanduliferus var. glanduliferus
(Under Nemacladus glanduliferus)
Synonym
Nemacladus glanduliferus var. orientalis
(Under Nemacladus orientalis)
Synonym
Nemacladus gracilisSLENDER NEMACLADUSNative
Nemacladus interiorNative
Nemacladus longiflorusNative
Nemacladus longiflorus var. breviflorusNative
Nemacladus longiflorus var. longiflorusNative
Nemacladus montanusNative
Nemacladus orientalisNative
Nemacladus pinnatifidusNative
Nemacladus ramosissimusNative
Nemacladus rigidusNative
Nemacladus rubescensNative
Nemacladus rubescens var. rubescens
(Under Nemacladus rubescens)
Synonym
Nemacladus rubescens var. tenuis
(Under Nemacladus tenuis)
Synonym
Nemacladus rubescens var. tenuis
(Under Nemacladus tenuis var. tenuis)
Synonym
Nemacladus secundiflorusNative
Nemacladus secundiflorus var. robbinsiiROBBINS' NEMACLADUSNative
Nemacladus secundiflorus var. secundiflorusLARGE-FLOWERED NEMACLADUSNative
Nemacladus sigmoideusNative
Nemacladus tenuisNative
Nemacladus tenuis var. aliformisNative
Nemacladus tenuis var. tenuisNative
Nemacladus twisselmanniiTWISSELMANN'S NEMACLADUSNative
Nemophila
  ↳  Key to Nemophila
Nemophila brevifloraGREAT BASIN NEMOPHILANative
Nemophila fremontii
(Under Nemophila pulchella var. fremontii)
Synonym
Nemophila heterophyllaNative
Nemophila maculataFIVESPOTNative
Nemophila menziesiiBABY BLUE-EYESNative
Nemophila menziesii var. atomariaNative
Nemophila menziesii var. integrifoliaNative
Nemophila menziesii var. menziesiiNative
Nemophila parvifloraNative
Nemophila parviflora var. austiniaeNative
Nemophila parviflora var. parvifloraNative
Nemophila parviflora var. quercifoliaOAK-LEAVED NEMOPHILANative
Nemophila pedunculataNative
Nemophila pulchellaNative
Nemophila pulchella var. fremontiiNative
Nemophila pulchella var. gracilisNative
Nemophila pulchella var. pulchellaNative
Nemophila spatulataNative
Neogaerrhinum filipes
(Under Antirrhinum filipes)
Synonym
Neogaerrhinum strictum
(Under Antirrhinum kelloggii)
Synonym
Neoholmgrenia
Neoholmgrenia andinaNative
Neokochia
  ↳  Key to Neokochia
Neokochia americanaNative
Neokochia californicaNative
Neolloydia johnsonii
(Under Sclerocactus johnsonii)
Synonym
Neostapfia
Neostapfia colusanaCOLUSA GRASSNative
Nepeta
Nepeta catariaCATNIPNaturalized
NeriumOLEANDER
Nerium oleanderCOMMON OLEANDERNaturalized
Nestotus
Nestotus stenophyllusNative
Neviusia
Neviusia cliftoniiSHASTA SNOW-WREATHNative
Nicandra
Nicandra physalodesAPPLE OF PERU, SHOO-FLY PLANTWaif
Nicolletia
Nicolletia occidentalisHOLE-IN-THE-SAND PLANTNative
Nicotiana
  ↳  Key to Nicotiana
TOBACCO
Nicotiana acuminata var. multifloraNaturalized
Nicotiana attenuataNative
Nicotiana bigelovii
(Under Nicotiana quadrivalvis)
Synonym
Nicotiana bigelovii var. wallacei
(Under Nicotiana quadrivalvis)
Synonym
Nicotiana clevelandiiNative
Nicotiana glaucaTREE TOBACCONaturalized
Nicotiana nana
(Under Hesperochiron nanus)
Synonym
Nicotiana obtusifoliaNative
Nicotiana quadrivalvisNative
Nicotiana quadrivalvis var. bigelovii
(Under Nicotiana quadrivalvis)
Synonym
Nicotiana quadrivalvis var. quadrivalvis
(Under Nicotiana quadrivalvis)
Synonym
Nicotiana sylvestrisWaif
Nicotiana trigonophylla
(Under Nicotiana obtusifolia)
Synonym
NitrariaceaeNITRARIA FAMILY
Nitrophila
  ↳  Key to Nitrophila
Nitrophila mohavensisAMARGOSA NITROPHILANative
Nitrophila occidentalisNative
Noccaea
Noccaea fendleri
  ↳  Key to Noccaea fendleri
Native
Noccaea fendleri subsp. californicaKNEELAND PRAIRIE PENNYCRESSNative
Noccaea fendleri subsp. glaucaNative
Noccaea glauca
(Under Noccaea fendleri subsp. glauca)
Synonym
Nolina
  ↳  Key to Nolina
BEARGRASS
Nolina bigeloviiNative
Nolina cismontanaCHAPARRAL NOLINANative
Nolina interrataDEHESA NOLINANative
Nolina parryiNative
Nolina parryi subsp. wolfii
(Under Nolina parryi)
Synonym
Nothocalais
  ↳  Key to Nothocalais
FALSE-DANDELION
Nothocalais alpestrisALPINE LAKE FALSE-DANDELIONNative
Nothocalais troximoidesSAGEBRUSH FALSE-DANDELIONNative
Nothochelone
Nothochelone nemorosaNative
Notholaena
Notholaena californicaCALIFORNIA CLOAK-FERNNative
Notholaena candida var. accessita
(Under Notholaena californica)
Synonym
Notholaena jonesii
(Under Argyrochosma jonesii)
Synonym
Notholaena limitanea
(Under Argyrochosma limitanea subsp. limitanea)
Synonym
NotholithocarpusTAN OAK, TANBARK OAK
Notholithocarpus densiflorus
  ↳  Key to Notholithocarpus densiflorus
Native
Notholithocarpus densiflorus var. densiflorusNative
Notholithocarpus densiflorus var. echinoidesNative
NothoscordumFALSE GARLIC
Nothoscordum aureum
(Under Bloomeria crocea var. aurea)
Synonym
Nothoscordum gracileNaturalized
Nothoscordum inodorum
(Under Nothoscordum gracile)
Misapplied name
NupharCOW-LILY, YELLOW POND-LILY
Nuphar lutea subsp. polysepala
(Under Nuphar polysepala)
Synonym
Nuphar polysepalaNative
Nuttallanthus
Nuttallanthus texanusBLUE TOADFLAXNative
Nuttallia cerasiformis
(Under Oemleria cerasiformis)
Synonym
Nyctaginaceae
  ↳  Key to Nyctaginaceae
FOUR O'CLOCK FAMILY
Nyctelea micrantha
(Under Eucrypta micrantha)
Synonym
Nyctelea pinetorum
(Under Eucrypta micrantha)
Synonym
Nyctelea torreyi
(Under Eucrypta chrysanthemifolia var. bipinnatifida)
Synonym
Nymphaea
  ↳  Key to Nymphaea
WATERLILY, WATER-NYMPH
Nymphaea mexicanaYELLOW or BANANA WATERLILYNaturalized
Nymphaea odorataFRAGRANT or WHITE WATERLILYNaturalized
Nymphaea polysepala
(Under Nuphar polysepala)
Synonym
Nymphaeaceae
  ↳  Key to Nymphaeaceae
WATERLILY FAMILY
NymphoidesFLOATING-HEART
Nymphoides peltataWATER FRINGENaturalized
Obione bracteosa
(Under Atriplex serenana)
Synonym
Obione confertifolia
(Under Atriplex confertifolia)
Synonym
Obione cordulata
(Under Atriplex cordulata)
Synonym
Obione coulteri
(Under Atriplex coulteri)
Synonym
Obione elegans
(Under Atriplex elegans)
Synonym
Obione flavida
(Under Atriplex flavida)
Synonym
Obione fruticulosa
(Under Atriplex fruticulosa)
Synonym
Obione glauca
(Under Atriplex glauca)
Synonym
Obione hymenelytra
(Under Atriplex hymenelytra)
Synonym
Obione lentiformis
(Under Atriplex lentiformis)
Synonym
Obione leucophylla
(Under Atriplex leucophylla)
Synonym
Obione microcarpa
(Under Atriplex pacifica)
Synonym
Obione parishii
(Under Atriplex parishii)
Synonym
Obione polycarpa
(Under Atriplex polycarpa)
Synonym
Obione pusilla
(Under Atriplex pusilla)
Synonym
Obione radiata
(Under Atriplex elegans)
Synonym
Obione torreyi
(Under Atriplex torreyi var. torreyi)
Synonym
Obione truncata
(Under Atriplex truncata)
Synonym
Obione tularensis
(Under Atriplex tularensis)
Synonym
Ocimum salinum
(Under Frankenia salina)
Synonym
Odontostomum
Odontostomum hartwegiiNative
OemleriaOSO BERRY
Oemleria cerasiformisNative
Oenanthe
Oenanthe sarmentosaNative
Oenothera
  ↳  Key to Oenothera
EVENING-PRIMROSE
Oenothera ×erythrosepala
(Under Oenothera glazioviana)
Synonym
Oenothera abramsii
(Under Camissoniopsis pallida subsp. pallida)
Synonym
Oenothera alyssoides
(Under Eremothera boothii subsp. alyssoides)
Synonym
Oenothera andina
(Under Neoholmgrenia andina)
Synonym
Oenothera arenaria
(Under Chylismia arenaria)
Synonym
Oenothera avitaNative
Oenothera avita subsp. avitaNative
Oenothera avita subsp. californicaNative
Oenothera avita subsp. eurekensisEUREKA DUNES EVENING-PRIMROSENative
Oenothera biennisCOMMON EVENING-PRIMROSENaturalized
Oenothera biennis
(Under Oenothera villosa subsp. strigosa)
Misapplied name
Oenothera bistorta
(Under Camissoniopsis bistorta)
Synonym
Oenothera bistorta var. veitchiana
(Under Camissoniopsis bistorta)
Synonym
Oenothera boothii
(Under Eremothera boothii)
Synonym
Oenothera boothii subsp. condensata
(Under Eremothera boothii subsp. condensata)
Synonym
Oenothera boothii subsp. decorticans
(Under Eremothera boothii subsp. decorticans)
Synonym
Oenothera boothii subsp. desertorum
(Under Eremothera boothii subsp. desertorum)
Synonym
Oenothera boothii subsp. intermedia
(Under Eremothera boothii subsp. intermedia)
Synonym
Oenothera boothii subsp. inyoensis
(Under Eremothera boothii subsp. desertorum)
Synonym
Oenothera boothii subsp. rutila
(Under Eremothera boothii subsp. decorticans)
Synonym
Oenothera brevipes
(Under Chylismia brevipes)
Synonym
Oenothera brevipes subsp. arizonica
(Under Chylismia brevipes subsp. arizonica)
Synonym
Oenothera brevipes subsp. pallidula
(Under Chylismia brevipes subsp. pallidula)
Synonym
Oenothera caespitosa
(Under Oenothera cespitosa)
Orthographic variant
Oenothera caespitosa subsp. crinita
(Under Oenothera cespitosa subsp. crinita)
Orthographic variant
Oenothera caespitosa subsp. marginata
(Under Oenothera cespitosa subsp. marginata)
Orthographic variant
Oenothera californica
(Under Oenothera avita)
Illegitimate name
Oenothera californica subsp. avita
(Under Oenothera avita subsp. avita)
Illegitimate name
Oenothera californica subsp. californica
(Under Oenothera avita subsp. californica)
Illegitimate name
Oenothera californica subsp. eurekensis
(Under Oenothera avita subsp. eurekensis)
Illegitimate name
Oenothera californica var. glabrata
(Under Oenothera avita subsp. californica)
Synonym
Oenothera campestris
(Under Camissonia campestris subsp. campestris)
Synonym
Oenothera campestris subsp. parishii
(Under Camissonia campestris subsp. campestris)
Synonym
Oenothera cardiophylla
(Under Chylismia cardiophylla)
Synonym
Oenothera cardiophylla subsp. robusta
(Under Chylismia cardiophylla subsp. robusta)
Synonym
Oenothera cavernaeCAVE EVENING-PRIMROSENative
Oenothera cespitosaFRAGRANT EVENING-PRIMROSENative
Oenothera cespitosa subsp. crinitaCESPITOSE EVENING-PRIMROSENative
Oenothera cespitosa subsp. marginataNative
Oenothera cespitosa var. crinita
(Under Oenothera cespitosa subsp. crinita)
Synonym
Oenothera cespitosa var. marginata
(Under Oenothera cespitosa subsp. marginata)
Synonym
Oenothera chamaenerioides
(Under Eremothera chamaenerioides)
Synonym
Oenothera cheiranthifolia
(Under Camissoniopsis cheiranthifolia)
Synonym
Oenothera cheiranthifolia subsp. suffruticosa
(Under Camissoniopsis cheiranthifolia subsp. suffruticosa)
Synonym
Oenothera cheiranthifolia var. nitida
(Under Camissoniopsis cheiranthifolia)
Synonym
Oenothera cheiranthifolia var. suffruticosa
(Under Camissoniopsis cheiranthifolia subsp. suffruticosa)
Synonym
Oenothera claviformis
(Under Chylismia claviformis)
Synonym
Oenothera claviformis subsp. aurantiaca
(Under Chylismia claviformis subsp. aurantiaca)
Synonym
Oenothera claviformis subsp. citrina
(Under Chylismia claviformis subsp. cruciformis)
Synonym
Oenothera claviformis subsp. cruciformis
(Under Chylismia claviformis subsp. cruciformis)
Synonym
Oenothera claviformis subsp. funerea
(Under Chylismia claviformis subsp. funerea)
Synonym
Oenothera claviformis subsp. integrior
(Under Chylismia claviformis subsp. integrior)
Synonym
Oenothera claviformis subsp. lancifolia
(Under Chylismia claviformis subsp. lancifolia)
Synonym
Oenothera claviformis subsp. peirsonii
(Under Chylismia claviformis subsp. peirsonii)
Synonym
Oenothera claviformis subsp. yumae
(Under Chylismia claviformis subsp. yumae)
Synonym
Oenothera contorta
(Under Camissonia contorta)
Synonym
Oenothera contorta var. flexuosa
(Under Camissonia parvula)
Synonym
Oenothera contorta var. flexuosa
(Under Camissonia pusilla)
Unabridged misapplied name
Oenothera cruciata
(Under Camissonia contorta)
Illegitimate name
Oenothera cruciata
(Under Camissonia lacustris)
Unabridged misapplied name
Oenothera curtifloraLIZARD-TAIL, VELVET WEEDNaturalized
Oenothera decorticans
(Under Eremothera boothii subsp. decorticans)
Synonym
Oenothera deltoidesDEVIL'S LANTERN, LION-IN-A-CAGE, BASKET EVENING-PRIMROSENative
Oenothera deltoides subsp. cognataNative
Oenothera deltoides subsp. deltoidesNative
Oenothera deltoides subsp. howelliiANTIOCH DUNES EVENING-PRIMROSENative
Oenothera deltoides subsp. piperiNative
Oenothera dentata
(Under Camissonia lacustris)
Unabridged misapplied name
Oenothera dentata
(Under Camissonia strigulosa)
Misapplied name
Oenothera deserti
(Under Eremothera refracta)
Synonym
Oenothera elataNative
Oenothera elata subsp. hirsutissimaNative
Oenothera elata subsp. hookeriNative
Oenothera flavaNative
Oenothera flava subsp. flava
(Under Oenothera flava)
Synonym
Oenothera glaziovianaNaturalized
Oenothera graciliflora
(Under Tetrapteron graciliflorum)
Synonym
Oenothera guadalupensis subsp. clementina
(Under Camissoniopsis guadalupensis subsp. clementina)
Synonym
Oenothera hallii
(Under Camissoniopsis pallida subsp. hallii)
Synonym
Oenothera heterochroma
(Under Chylismia heterochroma)
Synonym
Oenothera heterochroma subsp. monoensis
(Under Chylismia heterochroma)
Synonym
Oenothera heterophylla
(Under Camissoniopsis bistorta)
Synonym
Oenothera hirta
(Under Camissoniopsis intermedia)
Unabridged misapplied name
Oenothera hirta
(Under Camissoniopsis micrantha)
Illegitimate name
Oenothera hirtella
(Under Camissoniopsis hirtella)
Synonym
Oenothera hookeri
(Under Oenothera villosa subsp. strigosa)
Misapplied name
Oenothera hookeri subsp. angustifolia
(Under Oenothera elata subsp. hirsutissima)
Synonym
Oenothera hookeri subsp. grisea
(Under Oenothera elata subsp. hirsutissima)
Synonym
Oenothera hookeri subsp. montereyensis
(Under Oenothera elata subsp. hookeri)
Synonym
Oenothera hookeri subsp. venusta
(Under Oenothera elata subsp. hirsutissima)
Synonym
Oenothera hookeri subsp. wolfii
(Under Oenothera wolfii)
Synonym
Oenothera ignota
(Under Camissoniopsis confusa)
Unabridged misapplied name
Oenothera ignota
(Under Camissoniopsis ignota)
Synonym
Oenothera kernensis subsp. gilmanii
(Under Camissonia kernensis subsp. gilmanii)
Synonym
Oenothera kernensis subsp. mojavensis
(Under Camissonia kernensis subsp. gilmanii)
Synonym
Oenothera laciniataNaturalized
Oenothera laciniata subsp. pubescens
(Under Oenothera pubescens)
Synonym
Oenothera leptocarpa
(Under Eulobus californicus)
Synonym
Oenothera longissimaLONG-STEM EVENING-PRIMROSENative
Oenothera longissima subsp. clutei
(Under Oenothera longissima)
Synonym
Oenothera micrantha
(Under Camissoniopsis intermedia)
Unabridged misapplied name
Oenothera micrantha
(Under Camissoniopsis lewisii)
Unabridged misapplied name
Oenothera micrantha
(Under Camissoniopsis luciae)
Unabridged misapplied name
Oenothera micrantha
(Under Camissoniopsis micrantha)
Synonym
Oenothera micrantha
(Under Camissoniopsis robusta)
Unabridged misapplied name
Oenothera micrantha var. ignota
(Under Camissoniopsis ignota)
Synonym
Oenothera micrantha var. jonesii
(Under Camissoniopsis hirtella)
Synonym
Oenothera micrantha var. jonesii
(Under Camissoniopsis luciae)
Unabridged misapplied name
Oenothera minor
(Under Eremothera minor)
Synonym
Oenothera multijuga var. parviflora
(Under Chylismia walkeri subsp. tortilis)
Synonym
Oenothera munzii
(Under Chylismia munzii)
Synonym
Oenothera ovata
(Under Taraxia ovata)
Synonym
Oenothera palmeri
(Under Tetrapteron palmeri)
Synonym
Oenothera parvula
(Under Camissonia parvula)
Synonym
Oenothera primiverisNative
Oenothera primiveris subsp. bufonis
(Under Oenothera primiveris)
Synonym
Oenothera pterosperma
(Under Chylismiella pterosperma)
Synonym
Oenothera pubens
(Under Camissonia pubens)
Synonym
Oenothera pubescensNative
Oenothera refracta
(Under Eremothera refracta)
Synonym
Oenothera roseaWaif
Oenothera scapoidea var. tortilis
(Under Chylismia walkeri subsp. tortilis)
Synonym
Oenothera sinuosaWAVY-LEAVED GAURANaturalized
Oenothera speciosaNaturalized
Oenothera speciosa var. childsii
(Under Oenothera speciosa)
Synonym
Oenothera stricta subsp. strictaWaif
Oenothera strigosa
(Under Oenothera villosa subsp. strigosa)
Synonym
Oenothera strigulosa
(Under Camissonia contorta)
Unabridged misapplied name
Oenothera strigulosa
(Under Camissonia strigulosa)
Synonym
Oenothera subacaulis
(Under Taraxia subacaulis)
Synonym
Oenothera subacaulis var. taraxacifolia
(Under Taraxia subacaulis)
Synonym
Oenothera suffrutescensWILD HONEYSUCKLE, LINDA TARDENative
Oenothera tanacetifolia
(Under Taraxia tanacetifolia)
Synonym
Oenothera villosa subsp. strigosaNative
Oenothera walkeri subsp. tortilis
(Under Chylismia walkeri subsp. tortilis)
Synonym
Oenothera wolfiiWOLF'S EVENING-PRIMROSENative
Oenothera xenogauraNaturalized
Oenothera xylocarpaNative
OleaOLIVE
Olea europaeaNaturalized
Olea europaea subsp. africana
(Under Olea europaea)
Synonym
Oleaceae
  ↳  Key to Oleaceae
OLIVE FAMILY
Oligomeris
Oligomeris linifoliaNative
OlneyaIRONWOOD
Olneya tesotaIRONWOODNative
Olsynium
Olsynium douglasii var. douglasiiPURPLE-EYED-GRASS, GRASS WIDOWSNative
Onagraceae
  ↳  Key to Onagraceae
EVENING-PRIMROSE FAMILY
Oncosiphon
Oncosiphon piluliferSTINKNETNaturalized
Oncosiphon piluliferum
(Under Oncosiphon pilulifer)
Orthographic variant
Onobrychis
Onobrychis viciifoliaSANFOINNaturalized
Onopordum
  ↳  Key to Onopordum
Onopordum acanthium subsp. acanthiumSCOTCH THISTLENaturalized
Onopordum illyricumILLYRIAN THISTLENaturalized
Onopordum tauricumTAURIAN THISTLENaturalized
Onychium densum
(Under Aspidotis densa)
Synonym
Ophioglossaceae
  ↳  Key to Ophioglossaceae
ADDER'S-TONGUE FAMILY
Ophioglossum
  ↳  Key to Ophioglossum
ADDER'S-TONGUE
Ophioglossum californicumCALIFORNIA ADDER'S-TONGUENative
Ophioglossum lusitanicum subsp. californicum
(Under Ophioglossum californicum)
Synonym
Ophioglossum pusillumNORTHERN ADDER'S-TONGUENative
Ophioglossum vulgatum var. pseudopodum
(Under Ophioglossum pusillum)
Synonym
Opuntia
  ↳  Key to Opuntia
PRICKLY-PEAR
Opuntia ×charlestonensisNative
Opuntia ×fosbergii
(Under Cylindropuntia fosbergii)
Synonym
Opuntia ×munzii
(Under Cylindropuntia munzii)
Synonym
Opuntia ×occidentalisNative
Opuntia ×vaseyi
(Under Opuntia vaseyi)
Synonym
Opuntia ×wigginsii
(Under Cylindropuntia echinocarpa)
Synonym
Opuntia acanthocarpa subsp. ganderi
(Under Cylindropuntia ganderi)
Synonym
Opuntia acanthocarpa var. coloradensis
(Under Cylindropuntia acanthocarpa var. acanthocarpa)
Synonym
Opuntia basilarisNative
Opuntia basilaris var. basilarisBEAVERTAILNative
Opuntia basilaris var. brachycladaSHORT-JOINT BEAVERTAILNative
Opuntia basilaris var. ramosa
(Under Opuntia basilaris var. basilaris)
Synonym
Opuntia basilaris var. treleaseiBAKERSFIELD CACTUSNative
Opuntia bernardina
(Under Cylindropuntia bernardina)
Synonym
Opuntia bigelovii
(Under Cylindropuntia bigelovii)
Synonym
Opuntia bigelovii var. hoffmannii
(Under Cylindropuntia fosbergii)
Synonym
Opuntia californica var. parkeri
(Under Cylindropuntia bernardina)
Synonym
Opuntia chloroticaPANCAKE PRICKLY-PEARNative
Opuntia curvispinaNative
Opuntia echinocarpa
(Under Cylindropuntia echinocarpa)
Synonym
Opuntia echinocarpa var. parkeri
(Under Cylindropuntia bernardina)
Synonym
Opuntia engelmannii var. engelmanniiENGELMANN PRICKLY-PEARNative
Opuntia erinacea var. erinacea
(Under Opuntia polyacantha var. erinacea)
Synonym
Opuntia erinacea var. hystricina
(Under Opuntia polyacantha var. hystricina)
Synonym
Opuntia erinacea var. ursina
(Under Opuntia polyacantha var. erinacea)
Synonym
Opuntia erinacea var. utahensis
(Under Opuntia polyacantha var. erinacea)
Synonym
Opuntia ficus-indicaMISSION PRICKLY-PEARNaturalized
Opuntia ficus-indica
(Under Opuntia ×occidentalis)
Unabridged misapplied name
Opuntia fosbergii
(Under Cylindropuntia fosbergii)
Synonym
Opuntia fragilisBRITTLE PRICKLY-PEARNative
Opuntia ganderi
(Under Cylindropuntia ganderi)
Synonym
Opuntia humistrata
(Under Opuntia basilaris var. brachyclada)
Synonym
Opuntia leucotrichaNOPAL DURAZNILLOWaif
Opuntia littoralisNative
Opuntia littoralis
(Under Opuntia oricola)
Unabridged misapplied name
Opuntia littoralis var. austrocalifornica
(Under Opuntia vaseyi)
Synonym
Opuntia littoralis var. piercei
(Under Opuntia phaeacantha)
Synonym
Opuntia littoralis var. vaseyi
(Under Opuntia vaseyi)
Synonym
Opuntia megacantha
(Under Opuntia ficus-indica)
Unabridged misapplied name
Opuntia microdasysBUNNY EARSNaturalized
Opuntia munzii
(Under Cylindropuntia munzii)
Synonym
Opuntia occidentalis
(Under Opuntia littoralis)
Unabridged misapplied name
Opuntia occidentalis var. covillei
(Under Opuntia vaseyi)
Synonym
Opuntia oricolaNative
Opuntia parishii
(Under Grusonia parishii)
Synonym
Opuntia parryi
(Under Cylindropuntia bernardina)
Synonym
Opuntia parryi var. parryi
(Under Cylindropuntia bernardina)
Synonym
Opuntia parryi var. serpentina
(Under Cylindropuntia californica var. californica)
Synonym
Opuntia phaeacanthaBROWN-SPINED PRICKLY-PEARNative
Opuntia phaeacantha var. discata
(Under Opuntia engelmannii var. engelmannii)
Synonym
Opuntia phaeacantha var. major
(Under Opuntia phaeacantha)
Synonym
Opuntia polyacanthaSTARVATION PRICKLY-PEARNative
Opuntia polyacantha var. erinaceaMOJAVE PRICKLY-PEAR, GRIZZLY BEAR PRICKLY-PEARNative
Opuntia polyacantha var. hystricinaPORCUPINE PRICKLY-PEARNative
Opuntia polyacantha var. rufispina
(Under Opuntia polyacantha var. erinacea)
Misapplied name
Opuntia prolifera
(Under Cylindropuntia prolifera)
Synonym
Opuntia pulchella
(Under Grusonia pulchella)
Synonym
Opuntia ramosissima
(Under Cylindropuntia ramosissima)
Synonym
Opuntia robustaNOPAL TAPONWaif
Opuntia semispinosa
(Under Opuntia littoralis)
Synonym
Opuntia serpentina
(Under Cylindropuntia californica var. californica)
Synonym
Opuntia stanlyi
(Under Grusonia parishii)
Synonym
Opuntia stanlyi var. parishii
(Under Grusonia parishii)
Synonym
Opuntia treleasei
(Under Opuntia basilaris var. treleasei)
Synonym
Opuntia ursina
(Under Opuntia polyacantha var. erinacea)
Synonym
Opuntia vaseyiNative
Opuntia whitneyana
(Under Opuntia basilaris var. basilaris)
Synonym
Opuntia wigginsii
(Under Cylindropuntia echinocarpa)
Synonym
Opuntia wolfii
(Under Cylindropuntia wolfii)
Synonym
Orchidaceae
  ↳  Key to Orchidaceae
ORCHID FAMILY
Orcuttia
  ↳  Key to Orcuttia
Orcuttia californicaCALIFORNIA ORCUTT GRASSNative
Orcuttia californica var. inaequalis
(Under Orcuttia inaequalis)
Synonym
Orcuttia californica var. viscida
(Under Orcuttia viscida)
Synonym
Orcuttia greenei
(Under Tuctoria greenei)
Synonym
Orcuttia inaequalisSAN JOAQUIN VALLEY ORCUTT GRASSNative
Orcuttia mucronata
(Under Tuctoria mucronata)
Synonym
Orcuttia pilosaHAIRY ORCUTT GRASSNative
Orcuttia tenuisSLENDER ORCUTT GRASSNative
Orcuttia viscidaSACRAMENTO ORCUTT GRASSNative
Oreobroma aridorum
(Under Lewisia pygmaea)
Synonym
Oreobroma brachycalyx
(Under Lewisia brachycalyx)
Synonym
Oreobroma congdonii
(Under Lewisia congdonii)
Synonym
Oreobroma exarticulatum
(Under Lewisia pygmaea)
Synonym
Oreobroma heckneri
(Under Lewisia cotyledon var. heckneri)
Synonym
Oreobroma howellii
(Under Lewisia cotyledon var. howellii)
Synonym
Oreobroma leeanum
(Under Lewisia leeana)
Synonym
Oreobroma longipetalum
(Under Lewisia longipetala)
Synonym
Oreobroma oppositifolium
(Under Lewisia oppositifolia)
Synonym
Oreobroma triphyllum
(Under Lewisia triphylla)
Synonym
Oreocarya
  ↳  Key to Oreocarya
Oreocarya abortivaBOW-NUT OREOCARYANative
Oreocarya confertifloraYELLOW-FLOWERED OREOCARYANative
Oreocarya crymophilaSUBALPINE OREOCARYANative
Oreocarya flavoculataYELLOW-EYED OREOCARYANative
Oreocarya glomerataCOCKS-COMB CAT'S-EYENative
Oreocarya hoffmanniiWHITE MOUNTAINS OREOCARYANative
Oreocarya humilis subsp. humilisLOW OREOCARYANative
Oreocarya nubigenaSIERRA OREOCARYANative
Oreocarya roosiorumBRISTLECONE OREOCARYANative
Oreocarya schoolcraftiiSCHOOLCRAFT'S OREOCARYANative
Oreocarya soboliferaCREEPING OREOCARYANative
Oreocarya subretusaCRATER LAKE OREOCARYANative
Oreocarya tumulosaNEW YORK MOUNTAINS OREOCARYANative
Oreocarya virginensisVIRGIN RIVER OREOCARYANative
Oreonana
  ↳  Key to Oreonana
Oreonana clementisNative
Oreonana purpurascensPURPLE MOUNTAIN-PARSLEYNative
Oreonana vestitaWOOLLY MOUNTAIN-PARSLEYNative
Oreostemma
  ↳  Key to Oreostemma
ASTER
Oreostemma alpigenum var. andersoniiNative
Oreostemma elatumTALL ALPINE-ASTERNative
Oreostemma peirsoniiNative
Origanum
  ↳  Key to Origanum
Origanum ×majoricumITALIAN OREGANO, HARDY SWEET MARJORAMNaturalized
Origanum vulgare subsp. hirtumOREGANONaturalized
Ornithopus
  ↳  Key to Ornithopus
Ornithopus pinnatusNaturalized
Ornithopus sativusCOMMON BIRDSFOOTNaturalized
Ornithopus sativus subsp. isthmocarpus
(Under Ornithopus sativus)
Synonym
Ornithopus sativus subsp. sativus
(Under Ornithopus sativus)
Synonym
Ornithopus sativus var. macrorrhynchus
(Under Ornithopus sativus)
Synonym
Ornithostaphylos
Ornithostaphylos oppositifoliaBAJA CALIFORNIA BIRDBUSHNative
Orobanchaceae
  ↳  Key to Orobanchaceae
BROOMRAPE FAMILY
Orobanche bulbosa
(Under Aphyllon tuberosum)
Synonym
Orobanche californica
(Under Aphyllon californicum)
Synonym
Orobanche californica subsp. condensa
(Under Aphyllon californicum subsp. condensum)
Synonym
Orobanche californica subsp. feudgei
(Under Aphyllon californicum subsp. feudgei)
Synonym
Orobanche californica subsp. grandis
(Under Aphyllon californicum subsp. grande)
Synonym
Orobanche californica subsp. grayana
(Under Aphyllon californicum subsp. grayanum)
Synonym
Orobanche californica subsp. jepsonii
(Under Aphyllon californicum subsp. jepsonii)
Synonym
Orobanche californica var. californica
(Under Aphyllon vallicola)
Unabridged misapplied name
Orobanche californica var. claremontensis
(Under Aphyllon vallicola)
Unabridged misapplied name
Orobanche californica var. corymbosa
(Under Aphyllon corymbosum)
Synonym
Orobanche californica var. parishii
(Under Aphyllon parishii subsp. parishii)
Synonym
Orobanche cooperi
(Under Aphyllon cooperi)
Synonym
Orobanche corymbosa
(Under Aphyllon corymbosum)
Synonym
Orobanche fasciculata
(Under Aphyllon fasciculatum)
Synonym
Orobanche fasciculata var. franciscana
(Under Aphyllon franciscanum)
Synonym
Orobanche fasciculata var. lutea
(Under Aphyllon fasciculatum)
Synonym
Orobanche fasciculata var. subulata
(Under Aphyllon fasciculatum)
Synonym
Orobanche grayana var. feudgei
(Under Aphyllon californicum subsp. feudgei)
Synonym
Orobanche grayana var. grayana
(Under Aphyllon californicum subsp. grayanum)
Synonym
Orobanche grayana var. jepsonii
(Under Aphyllon californicum subsp. jepsonii)
Synonym
Orobanche grayana var. nelsonii
(Under Aphyllon californicum subsp. californicum)
Synonym
Orobanche grayana var. violacea
(Under Aphyllon californicum subsp. californicum)
Synonym
Orobanche parishii
(Under Aphyllon parishii)
Synonym
Orobanche parishii subsp. brachyloba
(Under Aphyllon parishii subsp. brachylobum)
Synonym
Orobanche pinorum
(Under Aphyllon pinorum)
Synonym
Orobanche ramosa
(Under Phelipanche ramosa)
Synonym
Orobanche uniflora
(Under Aphyllon purpureum)
Unabridged misapplied name
Orobanche uniflora subsp. occidentalis
(Under Aphyllon purpureum)
Synonym
Orobanche uniflora var. minuta
(Under Aphyllon purpureum)
Synonym
Orobanche uniflora var. purpurea
(Under Aphyllon purpureum)
Synonym
Orobanche uniflora var. sedi
(Under Aphyllon purpureum)
Synonym
Orobanche valida
(Under Aphyllon validum)
Synonym
Orobanche valida subsp. howellii
(Under Aphyllon validum subsp. howellii)
Synonym
Orobanche vallicola
(Under Aphyllon vallicola)
Synonym
Orochaenactis
Orochaenactis thysanocarphaNative
Orogenia fusiformis
(Under Lomatium fusiformis)
Synonym
Orthilia
Orthilia secundaONE-SIDED WINTERGREENNative
Orthocarpus
  ↳  Key to Orthocarpus
Orthocarpus attenuatus
(Under Castilleja attenuata)
Synonym
Orthocarpus bidwelliae var. micranthus
(Under Triphysaria micrantha)
Synonym
Orthocarpus bracteosusNative
Orthocarpus brevistyla
(Under Castilleja brevistyla)
Synonym
Orthocarpus campestris
(Under Castilleja campestris)
Synonym
Orthocarpus campestris var. succulentus
(Under Castilleja campestris subsp. succulenta)
Synonym
Orthocarpus castillejoides
(Under Castilleja ambigua)
Synonym
Orthocarpus castillejoides var. humboldtiensis
(Under Castilleja ambigua subsp. humboldtiensis)
Synonym
Orthocarpus castillejoides var. insalutatus
(Under Castilleja ambigua subsp. insalutata)
Synonym
Orthocarpus copelandii
(Under Orthocarpus cuspidatus subsp. copelandii)
Synonym
Orthocarpus copelandii var. cryptanthus
(Under Orthocarpus cuspidatus subsp. cryptanthus)
Synonym
Orthocarpus cuspidatusNative
Orthocarpus cuspidatus subsp. copelandiiNative
Orthocarpus cuspidatus subsp. cryptanthusNative
Orthocarpus cuspidatus subsp. cuspidatusSISKIYOU MOUNTAINS ORTHOCARPUSNative
Orthocarpus densiflorus
(Under Castilleja densiflora)
Synonym
Orthocarpus densiflorus
(Under Castilleja densiflora subsp. densiflora)
Synonym
Orthocarpus densiflorus subsp. gracilis
(Under Castilleja densiflora subsp. gracilis)
Synonym
Orthocarpus densiflorus var. gracilis
(Under Castilleja densiflora subsp. gracilis)
Synonym
Orthocarpus densiflorus var. obispoensis
(Under Castilleja densiflora subsp. obispoensis)
Synonym
Orthocarpus erianthus
(Under Triphysaria eriantha subsp. eriantha)
Synonym
Orthocarpus erianthus var. gratiosus
(Under Triphysaria eriantha subsp. eriantha)
Synonym
Orthocarpus erianthus var. micranthus
(Under Triphysaria micrantha)
Synonym
Orthocarpus erianthus var. roseus
(Under Triphysaria eriantha subsp. rosea)
Synonym
Orthocarpus faucibarbatus
(Under Triphysaria versicolor subsp. faucibarbata)
Synonym
Orthocarpus faucibarbatus subsp. albidus
(Under Triphysaria versicolor subsp. versicolor)
Synonym
Orthocarpus floribundus
(Under Triphysaria floribunda)
Synonym
Orthocarpus hispidus
(Under Castilleja tenuis)
Synonym
Orthocarpus imbricatusNative
Orthocarpus lacerus
(Under Castilleja lacera)
Synonym
Orthocarpus lasiorhynchus
(Under Castilleja lasiorhyncha)
Synonym
Orthocarpus linearilobus
(Under Castilleja lineariloba)
Synonym
Orthocarpus lithospermoides var. bicolor
(Under Castilleja rubicundula subsp. rubicundula)
Synonym
Orthocarpus lithospermoides var. lithospermoides
(Under Castilleja rubicundula subsp. lithospermoides)
Synonym
Orthocarpus luteusNative
Orthocarpus micranthus
(Under Triphysaria micrantha)
Synonym
Orthocarpus pachystachyusSHASTA ORTHOCARPUSNative
Orthocarpus purpurascens
(Under Castilleja exserta)
Synonym
Orthocarpus purpurascens
(Under Castilleja exserta subsp. exserta)
Synonym
Orthocarpus purpurascens var. latifolius
(Under Castilleja exserta subsp. latifolia)
Synonym
Orthocarpus purpurascens var. ornatus
(Under Castilleja exserta subsp. venusta)
Synonym
Orthocarpus purpurascens var. pallidus
(Under Castilleja exserta subsp. exserta)
Synonym
Orthocarpus pusillus
(Under Triphysaria pusilla)
Synonym
Orthocarpus versicolor var. roseus
(Under Triphysaria eriantha subsp. rosea)
Synonym
Oryctes
Oryctes nevadensisNEVADA ORYCTESNative
OryzaRICE
Oryza sativaNaturalized
Oryzopsis exigua
(Under Stipa exigua)
Synonym
Oryzopsis hymenoides
(Under Stipa hymenoides)
Synonym
Oryzopsis kingii
(Under Stipa kingii)
Synonym
Oryzopsis micrantha
(Under Stipa divaricata)
Synonym
Oryzopsis miliacea
(Under Stipa miliacea var. miliacea)
Synonym
Oryzopsis webberi
(Under Stipa webberi)
Synonym
Osmadenia
Osmadenia tenellaOSMADENIANative
Osmaronia cerasiformis
(Under Oemleria cerasiformis)
Synonym
Osmorhiza
  ↳  Key to Osmorhiza
SWEET-CICELY
Osmorhiza berteroiNative
Osmorhiza brachypodaNative
Osmorhiza chilensis
(Under Osmorhiza berteroi)
Synonym
Osmorhiza depauperataBLUNT-FRUITED SWEET-CICELYNative
Osmorhiza occidentalisNative
Osmorhiza purpureaNative
Osteospermum ecklonis
(Under Dimorphotheca ecklonis)
Synonym
Osteospermum fruticosum
(Under Dimorphotheca fruticosa)
Synonym
Ottelia
Ottelia alismoidesExtirpated alien
Ourisia californica
(Under Hesperochiron nanus)
Synonym
OxalidaceaeOXALIS FAMILY
Oxalis
  ↳  Key to Oxalis
Oxalis albicans subsp. californica
(Under Oxalis californica)
Synonym
Oxalis albicans subsp. pilosa
(Under Oxalis pilosa)
Synonym
Oxalis articulata subsp. rubraWINDOWBOX WOOD-SORRELNaturalized
Oxalis bowieiBOWIE'S WOOD-SORRELWaif
Oxalis californicaCALIFORNIA WOOD-SORRELNative
Oxalis cernua
(Under Oxalis pes-caprae)
Synonym
Oxalis corniculataNaturalized
Oxalis corniculata subsp. pilosa
(Under Oxalis pilosa)
Synonym
Oxalis corniculata var. wrightii
(Under Oxalis pilosa)
Synonym
Oxalis incarnataCRIMSON WOOD-SORRELNaturalized
Oxalis laxa
(Under Oxalis micrantha)
Misapplied name
Oxalis micranthaDWARF WOOD-SORRELNaturalized
Oxalis oreganaOREGON WOOD SORRELNative
Oxalis oregana f. smalliana
(Under Oxalis smalliana)
Synonym
Oxalis oregana var. smalliana
(Under Oxalis smalliana)
Synonym
Oxalis oregana var. smallii
(Under Oxalis smalliana)
Illegitimate name
Oxalis pes-capraeBERMUDA BUTTERCUPNaturalized
Oxalis pilosaNative
Oxalis purpureaPURPLE WOOD-SORRELWaif
Oxalis rubra
(Under Oxalis articulata subsp. rubra)
Synonym
Oxalis smallianaREDWOOD SORRELNative
Oxalis smallii
(Under Oxalis smalliana)
Illegitimate name
Oxalis suksdorfiiSUKSDORF'S WOOD-SORRELNative
Oxalis trilliifoliaNative
Oxalis variabilis
(Under Oxalis purpurea)
Synonym
Oxybaphus coccineus
(Under Mirabilis coccinea)
Synonym
Oxybaphus laevis
(Under Mirabilis laevis)
Synonym
Oxybaphus nyctagineus
(Under Mirabilis nyctaginea)
Synonym
Oxypolis
Oxypolis occidentalisNative
OxyriaMOUNTAIN SORREL
Oxyria digynaNative
Oxystylis lutea
(Under Cleomella oxystyloides)
Synonym
Oxytenia acerosa
(Under Euphrosyne acerosa)
Synonym
Oxytheca
  ↳  Key to Oxytheca
Oxytheca abramsii
(Under Acanthoscyphus parishii var. abramsii)
Synonym
Oxytheca caryophylloides
(Under Sidotheca caryophylloides)
Synonym
Oxytheca dendroidea subsp. dendroideaTREE-LIKE PUNCTUREBRACTNative
Oxytheca dendroidea var. foliosa
(Under Oxytheca dendroidea subsp. dendroidea)
Synonym
Oxytheca dendroidea var. hillmanii
(Under Oxytheca dendroidea subsp. dendroidea)
Synonym
Oxytheca emarginata
(Under Sidotheca emarginata)
Synonym
Oxytheca foliosa
(Under Oxytheca dendroidea subsp. dendroidea)
Synonym
Oxytheca glandulosa
(Under Eriogonum glandulosum)
Synonym
Oxytheca hirtiflora
(Under Eriogonum hirtiflorum)
Synonym
Oxytheca inermis
(Under Eriogonum inerme var. inerme)
Synonym
Oxytheca insignis
(Under Aristocapsa insignis)
Synonym
Oxytheca luteola
(Under Goodmania luteola)
Synonym
Oxytheca parishii
(Under Acanthoscyphus parishii)
Synonym
Oxytheca parishii subsp. abramsii
(Under Acanthoscyphus parishii var. abramsii)
Synonym
Oxytheca parishii var. abramsii
(Under Acanthoscyphus parishii var. abramsii)
Synonym
Oxytheca parishii var. cienegensis
(Under Acanthoscyphus parishii var. cienegensis)
Synonym
Oxytheca parishii var. goodmaniana
(Under Acanthoscyphus parishii var. goodmaniana)
Synonym
Oxytheca parishii var. parishii
(Under Acanthoscyphus parishii var. parishii)
Synonym
Oxytheca perfoliataROUND-LEAF PUNCTUREBRACTNative
Oxytheca reddingiana
(Under Eriogonum spergulinum var. reddingianum)
Synonym
Oxytheca spergulina
(Under Eriogonum spergulinum var. spergulinum)
Synonym
Oxytheca trilobata
(Under Sidotheca trilobata)
Synonym
Oxytheca watsoniiWATSON'S OXYTHECANative
Oxytropis
  ↳  Key to Oxytropis
LOCOWEED, OXYTROPE
Oxytropis borealisBOREAL LOCOWEEDNative
Oxytropis borealis var. australisNative
Oxytropis borealis var. viscidaSTICKY OXYTROPENative
Oxytropis deflexa var. culminis
(Under Oxytropis deflexa var. sericea)
Synonym
Oxytropis deflexa var. sericeaBLUE PENDENT-POD OXYTROPENative
Oxytropis oreophilaNative
Oxytropis oreophila var. juniperinaMOUNTAIN OXYTROPENative
Oxytropis oreophila var. oreophilaROCK-LOVING OXYTROPENative
Oxytropis parryiPARRY'S OXYTROPENative
Oxytropis viscida
(Under Oxytropis borealis var. viscida)
Synonym
Ozomelis
  ↳  Key to Ozomelis
Ozomelis diversifoliaNative
Ozomelis trifidaNative
Packera
  ↳  Key to Packera
GROUNDSEL, RAGWORT, BUTTERWEED
Packera bernardinaSAN BERNARDINO RAGWORTNative
Packera bolanderi var. bolanderiSEACOAST RAGWORTNative
Packera breweriBREWER'S RAGWORTNative
Packera canaWOOLLY GROUNDSELNative
Packera clevelandiiCLEVELAND'S RAGWORTNative
Packera eurycephalaNative
Packera eurycephala var. eurycephalaWIDEHEAD GROUNDSELNative
Packera eurycephala var. lewisroseiLEWIS ROSE'S RAGWORTNative
Packera ganderiGANDER'S RAGWORTNative
Packera greeneiFLAME RAGWORTNative
Packera hesperiaWESTERN RAGWORTNative
Packera indecoraRAYLESS MOUNTAIN RAGWORTNative
Packera ionophyllaTEHACHAPI RAGWORTNative
Packera layneaeLAYNE'S RAGWORTNative
Packera macouniiSISKIYOU MOUNTAINS RAGWORTNative
Packera multilobataLOBELEAF GROUNDSELNative
Packera paucifloraALPINE GROUNDSELNative
Packera pseudaurea var. pseudaureaFALSE-GOLD GROUNDSELNative
Packera streptanthifolia var. rubricaulis
(Under Packera streptanthifolia var. streptanthifolia)
Invalid name
Packera streptanthifolia var. rubricaulis
(Under Packera streptanthifolia var. streptanthifolia)
Invalid name
Packera streptanthifolia var. streptanthifoliaROCKY MOUNTAIN GROUNDSELNative
Packera subnuda var. subnudaCLEFTLEAF GROUNDSELNative
Packera werneriifoliaHOARY GROUNDSELNative
Paeonia
  ↳  Key to Paeonia
PEONY
Paeonia browniiNative
Paeonia californicaNative
PaeoniaceaePEONY FAMILY
Palafoxia
Palafoxia arida
  ↳  Key to Palafoxia arida
Native
Palafoxia arida var. aridaNative
Palafoxia arida var. giganteaGIANT SPANISH-NEEDLENative
Pallenis
Pallenis maritimaGOLD COINNaturalized
Pancratium
Pancratium maritimumNaturalized
Panicum
  ↳  Key to Panicum
PANIC GRASS
Panicum acuminatumNative
Panicum acuminatum var. fasciculatumPACIFIC PANIC GRASSNative
Panicum acuminatum var. lindheimeriNative
Panicum acuminatum var. thermaleGEYSERS PANICUMNative
Panicum antidotaleBLUE PANIC GRASSNaturalized
Panicum capillareWITCH GRASSNative
Panicum capillare subsp. hillmanii
(Under Panicum hillmanii)
Synonym
Panicum dichotomiflorum subsp. dichotomiflorumFALL PANIC GRASSNaturalized
Panicum dichotomiflorum var. dichotomiflorum
(Under Panicum dichotomiflorum subsp. dichotomiflorum)
Synonym
Panicum hillmaniiHILLMAN'S PANIC GRASSNaturalized
Panicum hirticaule subsp. hirticauleROUGHSTALK WITCH GRASSNative
Panicum hirticaule var. hirticaule
(Under Panicum hirticaule subsp. hirticaule)
Synonym
Panicum huachucae
(Under Panicum acuminatum var. fasciculatum)
Synonym
Panicum lassenianum
(Under Panicum acuminatum var. thermale)
Synonym
Panicum lindheimeri
(Under Panicum acuminatum var. lindheimeri)
Synonym
Panicum miliaceum subsp. miliaceumBROOM CORN MILLETNaturalized
Panicum occidentale
(Under Panicum acuminatum var. fasciculatum)
Synonym
Panicum oligosanthes var. scribnerianumSCRIBNER'S PANIC GRASSNative
Panicum pacificum
(Under Panicum acuminatum var. fasciculatum)
Synonym
Panicum rigidulum subsp. rigidulumREDTOP PANICUMNaturalized
Panicum rigidulum var. rigidulum
(Under Panicum rigidulum subsp. rigidulum)
Synonym
Panicum scribnerianum
(Under Panicum oligosanthes var. scribnerianum)
Synonym
Panicum thermale
(Under Panicum acuminatum var. thermale)
Synonym
Panicum urvilleanumSILKY PANIC GRASSNative
Papaver
  ↳  Key to Papaver
Papaver apulum var. micranthum
(Under Papaver hybridum)
Unabridged misapplied name
Papaver argemoneWaif
Papaver californicumFIRE POPPYNative
Papaver heterophyllumWIND POPPYNative
Papaver hybridumROUGH POPPYNaturalized
Papaver lemmonii
(Under Papaver californicum)
Synonym
Papaver rhoeasCORN POPPYNaturalized
Papaver somniferumOPIUM POPPYWaif
Papaveraceae
  ↳  Key to Papaveraceae
POPPY FAMILY
Pappostipa speciosa
(Under Stipa speciosa)
Synonym
Parapholis
  ↳  Key to Parapholis
SICKLE GRASS
Parapholis incurvaNaturalized
Parapholis strigosaNaturalized
Paraserianthes
Paraserianthes lophanthaPLUME ALBIZIANaturalized
Parathelypteris nevadensis
(Under Amauropelta nevadensis)
Synonym
Parentucellia
Parentucellia latifoliaBROADLEAF GLANDWEEDNaturalized
Parentucellia viscosa
(Under Bellardia viscosa)
Synonym
Parietaria
  ↳  Key to Parietaria
PELLITORY
Parietaria hesperaNative
Parietaria hespera var. californicaNative
Parietaria hespera var. hesperaNative
Parietaria judaicaNaturalized
Parietaria pensylvanicaNative
Parishella californica
(Under Nemacladus californicus)
Synonym
Parkinsonia
  ↳  Key to Parkinsonia
PALO VERDE
Parkinsonia aculeataMEXICAN PALO VERDENaturalized
Parkinsonia floridaBLUE PALO VERDENative
Parkinsonia microphyllaLITTLE-LEAVED PALO VERDENative
Parnassia
  ↳  Key to Parnassia
GRASS-OF-PARNASSUS
Parnassia californica
(Under Parnassia palustris)
Synonym
Parnassia cirrataNative
Parnassia cirrata var. cirrataSAN BERNARDINO GRASS-OF-PARNASSUSNative
Parnassia cirrata var. intermediaCASCADE GRASS-OF-PARNASSUSNative
Parnassia fimbriataNative
Parnassia palustrisNative
Parnassia palustris var. californica
(Under Parnassia palustris)
Synonym
Parnassia palustris var. montanensis
(Under Parnassia palustris)
Synonym
Parnassia palustris var. neogaea
(Under Parnassia palustris)
Synonym
Parnassia palustris var. parviflora
(Under Parnassia parviflora)
Synonym
Parnassia parvifloraSMALL-FLOWERED GRASS-OF-PARNASSUSNative
ParnassiaceaeGRASS-OF-PARNASSUS FAMILY
Paronychia
  ↳  Key to Paronychia
NAILWORT
Paronychia ahartiiAHART'S NAILWORT, AHART'S PARONYCHIANative
Paronychia echinulata var. echinulataNaturalized
Paronychia franciscanaNaturalized
Paronychia pusilla
(Under Herniaria hirsuta var. cinerea)
Synonym
Parosela parryi
(Under Marina parryi)
Synonym
Parrya menziesii var. glabra
(Under Phoenicaulis cheiranthoides)
Synonym
PartheniumFEVERFEW
Parthenium hysterophorusSANTA MARIANaturalized
ParthenocissusVIRGINIA CREEPER
Parthenocissus insertaWOODBINENaturalized
Parthenocissus vitacea
(Under Parthenocissus inserta)
Synonym
Parvisedum congdonii
(Under Sedella pumila)
Synonym
Parvisedum leiocarpum
(Under Sedella leiocarpa)
Synonym
Parvisedum pentandrum
(Under Sedella pentandra)
Synonym
Parvisedum pumilum
(Under Sedella pumila)
Synonym
Pascopyrum smithii
(Under Elymus smithii)
Synonym
Paspalum
  ↳  Key to Paspalum
Paspalum dilatatumDALLIS GRASSNaturalized
Paspalum distichumKNOT GRASSNative
Paspalum distichum var. indutum
(Under Paspalum distichum)
Synonym
Paspalum paspalodes
(Under Paspalum distichum)
Synonym
Paspalum urvilleiNaturalized
Paspalum vaginatumSEASHORE PASPALUMNaturalized
Passiflora
  ↳  Key to Passiflora
PASSION FLOWER
Passiflora caeruleaBLUE PASSION FLOWERNaturalized
Passiflora mollissima
(Under Passiflora tarminiana)
Misapplied name
Passiflora tarminianaBANANA PASSION FRUITNaturalized
PassifloraceaePASSION FLOWER FAMILY
PastinacaPARSNIP
Pastinaca sativaNaturalized
Paxistima
Paxistima myrsinitesOREGON BOXWOODNative
Pectiantia
  ↳  Key to Pectiantia
Pectiantia breweriNative
Pectiantia ovalisNative
Pectiantia pentandraNative
Pectis
  ↳  Key to Pectis
CHINCH-WEED
Pectis papposa var. papposaCOMMON CHINCH-WEEDNative
Pectocarya
  ↳  Key to Pectocarya
PECTOCARYA, COMBSEED
Pectocarya anisocarpaUNEQUAL-FRUITED PECTOCARYANative
Pectocarya heterocarpaMIXED-NUT PECTOCARYANative
Pectocarya linearis subsp. feroculaNARROW-TOOTHED PECTOCARYANative
Pectocarya penicillataNORTHERN PECTOCARYANative
Pectocarya peninsularisBAJA PECTOCARYANative
Pectocarya platycarpaWIDE-TOOTHED PECTOCARYANative
Pectocarya recurvataARCHED-NUT PECTOCARYANative
Pectocarya setosaROUND-NUT PECTOCARYANative
Pedicularis
  ↳  Key to Pedicularis
LOUSEWORT
Pedicularis attollensLITTLE ELEPHANT'S HEADNative
Pedicularis aurantiacaMOUNTAIN WARRIOR'S PLUMENative
Pedicularis bracteosa var. flavidaYELLOWISH LOUSEWORTNative
Pedicularis centrantheraGREAT BASIN LOUSEWORTNative
Pedicularis contortaCURVED-BEAK LOUSEWORTNative
Pedicularis crenulataSCALLOPED-LEAVED LOUSEWORTNative
Pedicularis crenulata f. candida
(Under Pedicularis crenulata)
Synonym
Pedicularis crenulata subsp. candida
(Under Pedicularis crenulata)
Synonym
Pedicularis densifloraWARRIOR'S PLUMENative
Pedicularis densiflora subsp. aurantiaca
(Under Pedicularis aurantiaca)
Synonym
Pedicularis dudleyiDUDLEY'S LOUSEWORTNative
Pedicularis flavida
(Under Pedicularis bracteosa var. flavida)
Synonym
Pedicularis groenlandicaELEPHANT'S HEADNative
Pedicularis groenlandica var. surrecta
(Under Pedicularis groenlandica)
Synonym
Pedicularis howelliiHOWELL'S LOUSEWORTNative
Pedicularis racemosaLEAFY LOUSEWORTNative
Pedicularis rigginsiaeARROYO DE LA CRUZ LOUSEWORTNative
Pedicularis semibarbataNative
Pediomelum
  ↳  Key to Pediomelum
BREADROOT
Pediomelum californicumNative
Pediomelum castoreumBEAVER DAM BREADROOTNative
PeganumHARMAL
Peganum harmalaAFRICAN RUE, SYRIAN RUENaturalized
Pelargonium
  ↳  Key to Pelargonium
GARDEN GERANIUM
Pelargonium ×hortorumFISH GERANIUMNaturalized
Pelargonium capitatumWaif
Pelargonium grossularioidesNaturalized
Pelargonium inquinansNaturalized
Pelargonium panduriformeOAK-LEAVED GERANIUMNaturalized
Pelargonium peltatumIVY GERANIUMWaif
Pelargonium vitifoliumWaif
Pelargonium zonaleHORSESHOE GERANIUMWaif
Pelazoneuron
Pelazoneuron puberulum var. sonorenseSONORAN MAIDEN FERNNative
Pelecyphora alversonii
(Under Escobaria alversonii)
Synonym
Pellaea
  ↳  Key to Pellaea
CLIFF-BRAKE
Pellaea andromedifoliaCOFFEE FERNNative
Pellaea brachypteraSIERRA CLIFF-BRAKENative
Pellaea breweriBREWER'S CLIFF-BRAKENative
Pellaea bridgesiiBRIDGES' CLIFF-BRAKENative
Pellaea mucronataBIRD'S-FOOT FERNNative
Pellaea mucronata var. californicaNative
Pellaea mucronata var. mucronataNative
Pellaea truncataSPINY CLIFF-BRAKENative
Pellaea wrightiana var. californica
(Under Pellaea mucronata var. californica)
Synonym
Peltandra
Peltandra virginicaGREEN ARROW ARUM, TUCKAHOEWaif
Peltiphyllum peltatum
(Under Darmera peltata)
Synonym
Pennisetum
  ↳  Key to Pennisetum
FOUNTAIN GRASS
Pennisetum ciliareBUFFEL GRASSNaturalized
Pennisetum clandestinumKIKUYU GRASSNaturalized
Pennisetum setaceumCRIMSON FOUNTAIN GRASSNaturalized
Pennisetum villosumFEATHERTOPNaturalized
Penstemon
  ↳  Key to Penstemon
BEARDTONGUE
Penstemon albomarginatusWHITE-MARGINED BEARDTONGUENative
Penstemon anguineusNative
Penstemon austinii
(Under Penstemon floridus var. austinii)
Synonym
Penstemon azureusNative
Penstemon azureus subsp. angustissimus
(Under Penstemon azureus var. angustissimus)
Synonym
Penstemon azureus subsp. azureus
(Under Penstemon azureus var. azureus)
Synonym
Penstemon azureus var. angustissimusNative
Penstemon azureus var. azureusNative
Penstemon barnebyiBARNEBY'S BEARDTONGUENative
Penstemon bicolorNative
Penstemon bicolor subsp. roseus
(Under Penstemon bicolor)
Synonym
Penstemon bridgesii
(Under Penstemon rostriflorus)
Synonym
Penstemon bryantiae
(Under Penstemon palmeri var. palmeri)
Synonym
Penstemon caesiusNative
Penstemon calcareusLIMESTONE BEARDTONGUENative
Penstemon californicusCALIFORNIA BEARDTONGUENative
Penstemon centranthifoliusSCARLET BUGLERNative
Penstemon cinicolaASH BEARDTONGUENative
Penstemon clevelandiiNative
Penstemon clevelandii var. clevelandiiNative
Penstemon clevelandii var. connatusSAN JACINTO BEARDTONGUENative
Penstemon clevelandii var. mohavensisNative
Penstemon confusus subsp. patens
(Under Penstemon patens)
Synonym
Penstemon confusus var. patens
(Under Penstemon patens)
Synonym
Penstemon cordifolius
(Under Keckiella cordifolia)
Synonym
Penstemon davidsonii var. davidsoniiNative
Penstemon deustusHOT-ROCK PENSTEMONNative
Penstemon deustus subsp. heterander
(Under Penstemon deustus var. pedicellatus)
Synonym
Penstemon deustus subsp. sudans
(Under Penstemon sudans)
Synonym
Penstemon deustus var. deustusNative
Penstemon deustus var. pedicellatusNative
Penstemon deustus var. savagei
(Under Penstemon deustus var. suffrutescens)
Synonym
Penstemon deustus var. suffrutescensNative
Penstemon eatoniiNative
Penstemon eatonii var. eatoniiNative
Penstemon eatonii var. undosusNative
Penstemon filiformisTHREAD-LEAVED BEARDTONGUENative
Penstemon floridusNative
Penstemon floridus var. austiniiNative
Penstemon floridus var. floridusNative
Penstemon fruticiformisNative
Penstemon fruticiformis subsp. amargosae
(Under Penstemon fruticiformis var. amargosae)
Synonym
Penstemon fruticiformis subsp. fruticiformis
(Under Penstemon fruticiformis var. fruticiformis)
Synonym
Penstemon fruticiformis var. amargosaeAMARGOSA BEARDTONGUENative
Penstemon fruticiformis var. fruticiformisNative
Penstemon gracilentusNative
Penstemon grinnelliiNative
Penstemon grinnellii subsp. grinnellii
(Under Penstemon grinnellii var. grinnellii)
Synonym
Penstemon grinnellii subsp. scrophularioides
(Under Penstemon grinnellii var. scrophularioides)
Synonym
Penstemon grinnellii var. grinnelliiNative
Penstemon grinnellii var. scrophularioidesNative
Penstemon heterodoxusNative
Penstemon heterodoxus var. cephalophorusNative
Penstemon heterodoxus var. heterodoxusNative
Penstemon heterodoxus var. shastensisSHASTA BEARDTONGUENative
Penstemon heterophyllusNative
Penstemon heterophyllus subsp. australis
(Under Penstemon heterophyllus var. australis)
Synonym
Penstemon heterophyllus subsp. heterophyllus
(Under Penstemon heterophyllus var. heterophyllus)
Synonym
Penstemon heterophyllus subsp. purdyi
(Under Penstemon heterophyllus var. purdyi)
Synonym
Penstemon heterophyllus var. australisNative
Penstemon heterophyllus var. heterophyllusNative
Penstemon heterophyllus var. purdyiNative
Penstemon hians
(Under Penstemon grinnellii var. grinnellii)
Synonym
Penstemon humilis subsp. humilis
(Under Penstemon humilis var. humilis)
Synonym
Penstemon humilis var. humilisNative
Penstemon incertusNative
Penstemon jacintensis
(Under Keckiella rothrockii var. jacintensis)
Synonym
Penstemon janishiaeJANISH'S BEARDTONGUENative
Penstemon labrosusNative
Penstemon laetusNative
Penstemon laetus subsp. laetus
(Under Penstemon laetus var. laetus)
Synonym
Penstemon laetus subsp. leptosepalus
(Under Penstemon laetus var. leptosepalus)
Synonym
Penstemon laetus subsp. roezlii
(Under Penstemon roezlii)
Synonym
Penstemon laetus subsp. sagittatus
(Under Penstemon laetus var. sagittatus)
Synonym
Penstemon laetus var. laetusNative
Penstemon laetus var. leptosepalusNative
Penstemon laetus var. sagittatusNative
Penstemon lemmonii
(Under Keckiella lemmonii)
Synonym
Penstemon linarioides var. californicus
(Under Penstemon californicus)
Synonym
Penstemon miser
(Under Penstemon janishiae)
Unabridged misapplied name
Penstemon monoensisNative
Penstemon nemorosus
(Under Nothochelone nemorosa)
Synonym
Penstemon neotericusPLUMAS COUNTY BEARDTONGUENative
Penstemon newberryiNative
Penstemon newberryi subsp. berryi
(Under Penstemon newberryi var. berryi)
Synonym
Penstemon newberryi subsp. newberryi
(Under Penstemon newberryi var. newberryi)
Synonym
Penstemon newberryi subsp. sonomensis
(Under Penstemon newberryi var. sonomensis)
Synonym
Penstemon newberryi var. berryiNative
Penstemon newberryi var. newberryiNative
Penstemon newberryi var. sonomensisSONOMA BEARDTONGUENative
Penstemon oreocharis
(Under Penstemon rydbergii var. oreocharis)
Synonym
Penstemon pahutensisPAHUTE BEARDTONGUENative
Penstemon palmeri var. palmeriNative
Penstemon papillatusINYO BEARDTONGUENative
Penstemon parvulusNative
Penstemon patensNative
Penstemon peirsonii
(Under Penstemon grinnellii var. scrophularioides)
Synonym
Penstemon personatusCLOSED-THROATED BEARDTONGUENative
Penstemon procerusNative
Penstemon procerus var. brachyanthusNative
Penstemon procerus var. formosusNative
Penstemon pseudospectabilisNative
Penstemon purpusiiSNOW MOUNTAIN BEARDTONGUENative
Penstemon rattaniiNative
Penstemon rattanii subsp. kleei
(Under Penstemon rattanii var. kleei)
Synonym
Penstemon rattanii subsp. rattanii
(Under Penstemon rattanii var. rattanii)
Synonym
Penstemon rattanii var. kleeiSANTA CRUZ MOUNTAINS BEARDTONGUENative
Penstemon rattanii var. rattaniiNative
Penstemon roezliiNative
Penstemon rostriflorusNative
Penstemon rupicolaNative
Penstemon rydbergii var. oreocharisNative
Penstemon scapoidesPINYON BEARDTONGUENative
Penstemon scrophularioides
(Under Penstemon grinnellii var. scrophularioides)
Synonym
Penstemon shastensis
(Under Penstemon heterodoxus var. shastensis)
Synonym
Penstemon speciosusNative
Penstemon speciosus subsp. kennedyi
(Under Penstemon speciosus)
Synonym
Penstemon spectabilisNative
Penstemon spectabilis subsp. spectabilis
(Under Penstemon spectabilis var. spectabilis)
Synonym
Penstemon spectabilis subsp. subviscosus
(Under Penstemon spectabilis var. subviscosus)
Synonym
Penstemon spectabilis var. spectabilisNative
Penstemon spectabilis var. subviscosusNative
Penstemon stephensiiSTEPHENS' BEARDTONGUENative
Penstemon sudansSUSANVILLE BEARDTONGUENative
Penstemon thompsoniaeTHOMPSON'S BEARDTONGUENative
Penstemon thompsoniae subsp. thompsoniae
(Under Penstemon thompsoniae)
Synonym
Penstemon thurberiTHURBER'S BEARDTONGUENative
Penstemon tracyiTRACY'S BEARDTONGUENative
Penstemon utahensisUTAH BEARDTONGUENative
Penstemon venustusNaturalized
Pentachaeta
  ↳  Key to Pentachaeta
Pentachaeta alsinoidesNative
Pentachaeta aureaNative
Pentachaeta aurea subsp. alleniiALLEN'S PENTACHAETANative
Pentachaeta aurea subsp. aureaGOLDEN-RAYED PENTACHAETANative
Pentachaeta bellidifloraWHITE-RAYED PENTACHAETANative
Pentachaeta exilisNative
Pentachaeta exilis subsp. aeolicaSAN BENITO PENTACHAETANative
Pentachaeta exilis subsp. exilisNative
Pentachaeta fragilisFRAGILE PENTACHAETANative
Pentachaeta lyoniiLYON'S PENTACHAETANative
Pentagramma
  ↳  Key to Pentagramma
GOLDBACK or SILVERBACK FERN
Pentagramma glanduloviscidaSAN DIEGO SILVERBACK FERNNative
Pentagramma maxoniiDESERT SILVERBACK FERNNative
Pentagramma pallidaFROSTY SILVERBACK FERNNative
Pentagramma rebmaniiREBMAN'S SILVERBACK FERNNative
Pentagramma triangularisGOLDBACK FERNNative
Pentagramma triangularis subsp. maxonii
(Under Pentagramma maxonii)
Synonym
Pentagramma triangularis subsp. rebmanii
(Under Pentagramma rebmanii)
Synonym
Pentagramma triangularis subsp. semipallida
(Under Pentagramma triangularis)
Synonym
Pentagramma triangularis subsp. viscosa
(Under Pentagramma viscosa)
Synonym
Pentagramma viscosaCOASTAL SILVERBACK FERNNative
Pentaphylloides fruticosa
(Under Dasiphora fruticosa)
Synonym
Peplis portula
(Under Lythrum portula)
Synonym
Peraphyllum
Peraphyllum ramosissimumNative
Perezia microcephala
(Under Acourtia microcephala)
Synonym
Pericome
Pericome caudataNative
Perideridia
  ↳  Key to Perideridia
YAMPAH
Perideridia bacigalupiiBACIGALUPI'S YAMPAHNative
Perideridia bolanderiNative
Perideridia bolanderi subsp. bolanderiNative
Perideridia bolanderi subsp. involucrataNative
Perideridia californicaNative
Perideridia gairdneriNative
Perideridia gairdneri subsp. borealisNative
Perideridia gairdneri subsp. gairdneriGAIRDNER'S YAMPAHNative
Perideridia howelliiNative
Perideridia kelloggiiNative
Perideridia lemmoniiNative
Perideridia leptocarpaNARROW-SEEDED YAMPAHNative
Perideridia oreganaNative
Perideridia parishiiNative
Perideridia parishii subsp. latifoliaNative
Perideridia parishii subsp. parishiiPARISH'S YAMPAHNative
Perideridia pringleiADOBE YAMPAHNative
Peritoma arborea
(Under Cleomella arborea)
Synonym
Peritoma arborea var. angustata
(Under Cleomella arborea var. angustata)
Synonym
Peritoma arborea var. arborea
(Under Cleomella arborea var. arborea)
Synonym
Peritoma arborea var. globosa
(Under Cleomella arborea var. globosa)
Synonym
Peritoma jonesii
(Under Cleomella jonesii)
Synonym
Peritoma lutea
(Under Cleomella lutea)
Synonym
Peritoma platycarpa
(Under Cleomella platycarpa)
Synonym
Peritoma serrulata
(Under Cleomella serrulata)
Synonym
PerityleROCK DAISY
Perityle emoryiEMORY'S ROCK DAISYNative
Perityle intricata
(Under Laphamia intricata)
Synonym
Perityle inyoensis
(Under Laphamia inyoensis)
Synonym
Perityle megalocephala var. intricata
(Under Laphamia intricata)
Synonym
Perityle megalocephala var. megalocephala
(Under Laphamia megalocephala var. megalocephala)
Synonym
Perityle megalocephala var. oligophylla
(Under Laphamia megalocephala var. oligophylla)
Synonym
Perityle villosa
(Under Laphamia villosa)
Synonym
PerseaRED BAY
Persea americanaAVOCADOWaif
Persicaria
  ↳  Key to Persicaria
SMARTWEED
Persicaria amphibiaWATER SMARTWEEDNative
Persicaria amphibia var. emersa
(Under Persicaria amphibia)
Synonym
Persicaria amphibia var. stipulacea
(Under Persicaria amphibia)
Synonym
Persicaria capitataNaturalized
Persicaria coccinea
(Under Persicaria amphibia)
Synonym
Persicaria fusiformis
(Under Persicaria maculosa)
Synonym
Persicaria hydropiperWATERPEPPERNaturalized
Persicaria hydropiperoidesFALSE WATERPEPPERNative
Persicaria lapathifoliaWILLOW WEEDNative
Persicaria maculosaLADY'S THUMBNaturalized
Persicaria mississippiensis
(Under Persicaria pensylvanica)
Synonym
Persicaria opelousana
(Under Persicaria hydropiperoides)
Synonym
Persicaria orientalisKISS-ME-OVER-THE-GARDEN-GATEWaif
Persicaria paludicola
(Under Persicaria hydropiperoides)
Synonym
Persicaria pensylvanicaPINKWEEDNaturalized
Persicaria pensylvanica var. dura
(Under Persicaria pensylvanica)
Synonym
Persicaria polystachya
(Under Persicaria wallichii)
Illegitimate name
Persicaria punctataNative
Persicaria wallichiiHIMALAYAN KNOTWEEDNaturalized
Petalonyx
  ↳  Key to Petalonyx
SANDPAPER-PLANT
Petalonyx gilmanii
(Under Petalonyx thurberi subsp. gilmanii)
Synonym
Petalonyx linearisNative
Petalonyx nitidusNative
Petalonyx thurberiNative
Petalonyx thurberi subsp. gilmaniiDEATH VALLEY SANDPAPER-PLANTNative
Petalonyx thurberi subsp. thurberiNative
Petalostemon ornatus
(Under Dalea ornata)
Synonym
Petalostemon searlsiae
(Under Dalea searlsiae)
Synonym
Petasites
Petasites frigidus var. palmatusWESTERN SWEET COLTSFOOTNative
Peteria
Peteria thompsoniaeSPINE-NODED MILKVETCHNative
Petradoria
Petradoria pumila subsp. pumila
(Under Petradoria pumila var. pumila)
Synonym
Petradoria pumila var. pumilaROCK-GOLDENRODNative
Petrophyton caespitosum
(Under Petrophytum caespitosum)
Orthographic variant
Petrophyton caespitosum subsp. acuminatum
(Under Petrophytum caespitosum subsp. acuminatum)
Orthographic variant
Petrophyton caespitosum subsp. caespitosum
(Under Petrophytum caespitosum subsp. caespitosum)
Orthographic variant
Petrophytum
Petrophytum caespitosum
  ↳  Key to Petrophytum caespitosum
Native
Petrophytum caespitosum subsp. acuminatumNative
Petrophytum caespitosum subsp. caespitosumNative
Petrorhagia
  ↳  Key to Petrorhagia
Petrorhagia dubiaNaturalized
Petrorhagia nanteuiliiNaturalized
Petrorhagia proliferaPROLIFEROUS PINKNaturalized
Petrorhagia velutina
(Under Petrorhagia dubia)
Synonym
Petroselinum
Petroselinum crispumPARSLEYWaif
Petunia
Petunia parvifloraNative
PeucephyllumPYGMY-CEDAR
Peucephyllum schottiiNative
Phacelia
  ↳  Key to Phacelia
Phacelia acanthominthoides
(Under Phacelia ciliata)
Synonym
Phacelia adenophoraNative
Phacelia affinisNative
Phacelia aldersonii
(Under Phacelia davidsonii)
Synonym
Phacelia alpina
(Under Phacelia hastata var. hastata)
Synonym
Phacelia alvordensis
(Under Phacelia distans)
Synonym
Phacelia amabilisSALINE VALLEY PHACELIANative
Phacelia ambigua var. minutiflora
(Under Phacelia crenulata var. minutiflora)
Synonym
Phacelia ammophila
(Under Phacelia distans)
Synonym
Phacelia anelsoniiAVEN NELSON'S PHACELIANative
Phacelia argenteaSAND DUNE PHACELIANative
Phacelia arthuri
(Under Phacelia distans)
Synonym
Phacelia austromontanaNative
Phacelia barnebyanaBARNEBY'S PHACELIANative
Phacelia bicolorNative
Phacelia bicolor var. bicolor
(Under Phacelia bicolor)
Synonym
Phacelia biennis
(Under Phacelia hastata var. hastata)
Synonym
Phacelia biolettii
(Under Phacelia californica)
Synonym
Phacelia bolanderiNative
Phacelia brachylobaNative
Phacelia brannanii
(Under Phacelia fremontii)
Synonym
Phacelia breweriNative
Phacelia burkei
(Under Phacelia hastata var. hastata)
Synonym
Phacelia californicaNative
Phacelia californica var. bernardina
(Under Phacelia imbricata var. bernardina)
Synonym
Phacelia californica var. egena
(Under Phacelia egena)
Synonym
Phacelia californica var. jacintensis
(Under Phacelia mutabilis)
Synonym
Phacelia californica var. patula
(Under Phacelia imbricata var. patula)
Synonym
Phacelia californica var. rotundata
(Under Phacelia argentea)
Synonym
Phacelia californica var. rubacea
(Under Phacelia heterophylla var. virgata)
Synonym
Phacelia californica var. virgata
(Under Phacelia heterophylla var. virgata)
Synonym
Phacelia calthifoliaNative
Phacelia campanulariaDESERT BLUEBELLSNative
Phacelia campanularia subsp. campanularia
(Under Phacelia campanularia var. campanularia)
Synonym
Phacelia campanularia subsp. vasiformis
(Under Phacelia campanularia var. vasiformis)
Synonym
Phacelia campanularia var. campanulariaNative
Phacelia campanularia var. vasiformisNative
Phacelia campestris
(Under Phacelia ivesiana)
Synonym
Phacelia canescens
(Under Phacelia hastata var. hastata)
Synonym
Phacelia cicutariaNative
Phacelia cicutaria subsp. hispida
(Under Phacelia cicutaria var. hispida)
Synonym
Phacelia cicutaria var. cicutariaNative
Phacelia cicutaria var. eximia
(Under Phacelia cicutaria var. hispida)
Synonym
Phacelia cicutaria var. hispidaNative
Phacelia cicutaria var. hubbyi
(Under Phacelia hubbyi)
Synonym
Phacelia ciliataNative
Phacelia ciliosa
(Under Phacelia sericea var. ciliosa)
Synonym
Phacelia cinerea
(Under Phacelia distans)
Synonym
Phacelia circinata var. integrifolia
(Under Phacelia hastata var. hastata)
Synonym
Phacelia circinatiformis
(Under Phacelia phacelioides)
Synonym
Phacelia coeruleaSKY-BLUE PHACELIANative
Phacelia compacta
(Under Phacelia hastata var. compacta)
Synonym
Phacelia congdoniiNative
Phacelia conmixta
(Under Phacelia distans)
Synonym
Phacelia cookeiCOOKE'S PHACELIANative
Phacelia cooperae
(Under Phacelia brachyloba)
Synonym
Phacelia corymbosaNative
Phacelia crassifolia
(Under Phacelia gymnoclada)
Synonym
Phacelia crenulataNative
Phacelia crenulata var. ambiguaNative
Phacelia crenulata var. crenulataNative
Phacelia crenulata var. funerea
(Under Phacelia crenulata var. crenulata)
Synonym
Phacelia crenulata var. minutifloraNative
Phacelia cryptanthaNative
Phacelia cryptantha var. derivata
(Under Phacelia cryptantha)
Synonym
Phacelia curvipesNative
Phacelia curvipes var. davidsonii
(Under Phacelia davidsonii)
Synonym
Phacelia curvipes var. insularis
(Under Phacelia insularis var. insularis)
Synonym
Phacelia curvipes var. macrantha
(Under Phacelia davidsonii)
Synonym
Phacelia curvipes var. pratensis
(Under Phacelia davidsonii)
Synonym
Phacelia curvipes var. yosemitana
(Under Phacelia vallicola)
Synonym
Phacelia dalesiana
(Under Howellanthus dalesianus)
Synonym
Phacelia damnationensisDAMNATION PASS PHACELIANative
Phacelia dasyphylla
(Under Phacelia hastata var. compacta)
Synonym
Phacelia dasyphylla var. ophitidis
(Under Phacelia corymbosa)
Synonym
Phacelia davidsoniiNative
Phacelia davidsonii var. macrantha
(Under Phacelia davidsonii)
Synonym
Phacelia distansNative
Phacelia distans subvar. ammophila
(Under Phacelia distans)
Synonym
Phacelia distans subvar. genuina
(Under Phacelia distans)
Synonym
Phacelia distans subvar. leptostachya
(Under Phacelia distans)
Synonym
Phacelia distans var. australis
(Under Phacelia distans)
Synonym
Phacelia distans var. scabrella
(Under Phacelia distans)
Synonym
Phacelia divaricataNative
Phacelia divaricata var. congdonii
(Under Phacelia congdonii)
Synonym
Phacelia divaricata var. continentis
(Under Phacelia insularis var. continentis)
Synonym
Phacelia divaricata var. insularis
(Under Phacelia insularis var. insularis)
Synonym
Phacelia dociana
(Under Phacelia quickii)
Synonym
Phacelia douglasiiNative
Phacelia douglasii subsp. cryptantha
(Under Phacelia stellaris)
Synonym
Phacelia douglasii var. cryptantha
(Under Phacelia stellaris)
Synonym
Phacelia egenaNative
Phacelia eiseniiNative
Phacelia eremica
(Under Phacelia cryptantha)
Synonym
Phacelia exilisTRANSVERSE RANGE PHACELIANative
Phacelia eximia
(Under Phacelia cicutaria var. hispida)
Synonym
Phacelia flaccida
(Under Phacelia rattanii)
Synonym
Phacelia floribundaMANY-FLOWERED PHACELIANative
Phacelia fremontiiNative
Phacelia frigida
(Under Phacelia hastata var. compacta)
Synonym
Phacelia frigida subsp. dasyphylla
(Under Phacelia hastata var. compacta)
Synonym
Phacelia frigida subsp. frigida
(Under Phacelia hastata var. compacta)
Synonym
Phacelia geraniifolia
(Under Phacelia perityloides var. jaegeri)
Synonym
Phacelia glanduliferaNative
Phacelia gooddingii
(Under Phacelia pulchella var. gooddingii)
Synonym
Phacelia grandifloraNative
Phacelia greeneiSCOTT VALLEY PHACELIANative
Phacelia griseaNative
Phacelia gymnocladaNAKED-STEMMED PHACELIANative
Phacelia hallii
(Under Phacelia fremontii)
Synonym
Phacelia hastataNative
Phacelia hastata subsp. compacta
(Under Phacelia hastata var. compacta)
Synonym
Phacelia hastata subsp. hastata
(Under Phacelia hastata var. hastata)
Synonym
Phacelia hastata var. alpina
(Under Phacelia hastata var. hastata)
Synonym
Phacelia hastata var. compactaNative
Phacelia hastata var. dasyphylla
(Under Phacelia hastata var. compacta)
Synonym
Phacelia hastata var. hastataNative
Phacelia hastata var. leucophylla
(Under Phacelia hastata var. hastata)
Synonym
Phacelia heterophylla subsp. virgata
(Under Phacelia heterophylla var. virgata)
Synonym
Phacelia heterophylla var. alpina
(Under Phacelia hastata var. hastata)
Synonym
Phacelia heterophylla var. compacta
(Under Phacelia hastata var. compacta)
Synonym
Phacelia heterophylla var. dasyphylla
(Under Phacelia hastata var. compacta)
Synonym
Phacelia heterophylla var. frigida
(Under Phacelia hastata var. compacta)
Synonym
Phacelia heterophylla var. griseophylla
(Under Phacelia mutabilis)
Synonym
Phacelia heterophylla var. pseudohispida
(Under Phacelia mutabilis)
Synonym
Phacelia heterophylla var. pygmaea
(Under Phacelia hastata var. compacta)
Synonym
Phacelia heterophylla var. rotundata
(Under Phacelia argentea)
Synonym
Phacelia heterophylla var. virgataNative
Phacelia heterosperma
(Under Phacelia lemmonii)
Synonym
Phacelia hispida subvar. cicutaria
(Under Phacelia cicutaria var. cicutaria)
Synonym
Phacelia hispida var. brachyantha
(Under Phacelia cryptantha)
Synonym
Phacelia hispida var. cicutaria
(Under Phacelia cicutaria var. cicutaria)
Synonym
Phacelia hispida var. eximia
(Under Phacelia cicutaria var. hispida)
Synonym
Phacelia hispida var. hubbyi
(Under Phacelia hubbyi)
Synonym
Phacelia hispida var. umbrosa
(Under Phacelia umbrosa)
Synonym
Phacelia hubbyiNative
Phacelia humilisNative
Phacelia humilis var. congdonii
(Under Phacelia congdonii)
Synonym
Phacelia humilis var. dudleyiNative
Phacelia humilis var. humilisNative
Phacelia humilis var. lobata
(Under Phacelia austromontana)
Synonym
Phacelia hydrophylloidesNative
Phacelia imbricataNative
Phacelia imbricata subsp. bernardina
(Under Phacelia imbricata var. bernardina)
Synonym
Phacelia imbricata subsp. imbricata
(Under Phacelia imbricata var. bernardina)
Synonym, in part
Phacelia imbricata subsp. imbricata
(Under Phacelia imbricata var. imbricata)
Synonym, in part
Phacelia imbricata subsp. patula
(Under Phacelia imbricata var. patula)
Synonym
Phacelia imbricata var. bernardinaNative
Phacelia imbricata var. caudata
(Under Phacelia imbricata var. imbricata)
Synonym
Phacelia imbricata var. imbricataNative
Phacelia imbricata var. patulaNative
Phacelia insularisNative
Phacelia insularis var. continentisNORTH COAST PHACELIANative
Phacelia insularis var. insularisNORTHERN CHANNEL ISLANDS PHACELIANative
Phacelia inundataPLAYA PHACELIANative
Phacelia inyoensisINYO PHACELIANative
Phacelia ivesianaNative
Phacelia ivesiana var. glandulifera
(Under Phacelia glandulifera)
Synonym
Phacelia keckiiSANTIAGO PEAK PHACELIANative
Phacelia lemmoniiNative
Phacelia leonisSISKIYOU PHACELIANative
Phacelia leptostachya
(Under Phacelia distans)
Synonym
Phacelia leucantha
(Under Phacelia brachyloba)
Synonym
Phacelia leucophylla
(Under Phacelia hastata var. hastata)
Synonym
Phacelia leucophylla var. alpina
(Under Phacelia hastata var. hastata)
Synonym
Phacelia leucophylla var. compacta
(Under Phacelia hastata var. compacta)
Synonym
Phacelia leucophylla var. suksdorfii
(Under Phacelia hastata var. hastata)
Synonym
Phacelia linearisNative
Phacelia loasifolia
(Under Phacelia malvifolia var. loasifolia)
Synonym
Phacelia lobata
(Under Phacelia austromontana)
Synonym
Phacelia longipesNative
Phacelia lutea var. glandulifera
(Under Phacelia adenophora)
Synonym
Phacelia luteopurpurea
(Under Phacelia glandulifera)
Synonym
Phacelia lyoniiNative
Phacelia magellanica f. compacta
(Under Phacelia hastata var. compacta)
Synonym
Phacelia magellanica f. egena
(Under Phacelia egena)
Synonym
Phacelia magellanica f. patula
(Under Phacelia imbricata var. patula)
Synonym
Phacelia magellanica var. californica
(Under Phacelia californica)
Synonym
Phacelia magellanica var. corymbosa
(Under Phacelia corymbosa)
Synonym
Phacelia magellanica var. frigida
(Under Phacelia hastata var. compacta)
Synonym
Phacelia magellanica var. griseophylla
(Under Phacelia mutabilis)
Synonym
Phacelia magellanica var. integrifolia
(Under Phacelia hastata var. hastata)
Synonym
Phacelia magellanica var. jacintensis
(Under Phacelia mutabilis)
Synonym
Phacelia magellanica var. patula
(Under Phacelia imbricata var. patula)
Synonym
Phacelia malvifoliaNative
Phacelia malvifolia
(Under Phacelia malvifolia var. loasifolia)
Synonym, in part
Phacelia malvifolia
(Under Phacelia malvifolia var. malvifolia)
Synonym, in part
Phacelia malvifolia subsp. loasifolia
(Under Phacelia malvifolia var. loasifolia)
Synonym
Phacelia malvifolia var. loasifoliaNative
Phacelia malvifolia var. malvifoliaNative
Phacelia marcescensNative
Phacelia menziesii
(Under Phacelia linearis)
Synonym
Phacelia micrantha
(Under Eucrypta micrantha)
Synonym
Phacelia micrantha var. bipinnatifida
(Under Eucrypta chrysanthemifolia var. bipinnatifida)
Synonym
Phacelia minima
(Under Phacelia eisenii)
Synonym
Phacelia minorWILD CANTERBURY BELLSNative
Phacelia minor var. campanularia
(Under Phacelia campanularia var. campanularia)
Synonym
Phacelia minor var. whitlavia
(Under Phacelia minor)
Synonym
Phacelia minutiflora
(Under Phacelia crenulata var. minutiflora)
Synonym
Phacelia mohavensisMOJAVE PHACELIANative
Phacelia mohavensis var. exilis
(Under Phacelia exilis)
Synonym
Phacelia monoensisMONO COUNTY PHACELIANative
Phacelia monosperma
(Under Phacelia heterophylla var. virgata)
Synonym
Phacelia mustelinaDEATH VALLEY ROUND-LEAVED PHACELIANative
Phacelia mutabilisNative
Phacelia mutabilis var. frigida
(Under Phacelia hastata var. compacta)
Synonym
Phacelia namatoides
(Under Phacelia racemosa)
Synonym
Phacelia nashianaCHARLOTTE'S PHACELIANative
Phacelia neglectaNative
Phacelia nemophiloides
(Under Phacelia davidsonii)
Synonym
Phacelia nemoralisNative
Phacelia nemoralis subsp. nemoralis
(Under Phacelia nemoralis var. nemoralis)
Synonym
Phacelia nemoralis subsp. oregonensis
(Under Phacelia nemoralis var. oregonensis)
Synonym
Phacelia nemoralis var. mutabilis
(Under Phacelia mutabilis)
Synonym
Phacelia nemoralis var. nemoralisNative
Phacelia nemoralis var. oregonensisNative
Phacelia nemoralis var. pseudohispida
(Under Phacelia mutabilis)
Synonym
Phacelia nervosa
(Under Phacelia hastata var. hastata)
Synonym
Phacelia novenmillensisNINE MILE CANYON PHACELIANative
Phacelia orcuttiana
(Under Phacelia brachyloba)
Synonym
Phacelia oreopola
(Under Phacelia imbricata var. patula)
Synonym
Phacelia oreopola subsp. oreopola
(Under Phacelia imbricata var. patula)
Synonym
Phacelia oreopola subsp. simulans
(Under Phacelia hastata var. hastata)
Synonym
Phacelia orogenesMOUNTAIN PHACELIANative
Phacelia pachyphyllaNative
Phacelia palmeri
(Under Phacelia stellaris)
Synonym
Phacelia parishiiPARISH'S PHACELIANative
Phacelia parryiNative
Phacelia pedicellataNative
Phacelia peirsonianaPEIRSON'S PHACELIANative
Phacelia perityloidesNative
Phacelia perityloides var. jaegeriJAEGER'S PHACELIANative
Phacelia perityloides var. perityloidesNative
Phacelia phacelioidesMOUNT DIABLO PHACELIANative
Phacelia phyllomanica var. interrupta
(Under Phacelia floribunda)
Synonym
Phacelia piersoniae
(Under Phacelia heterophylla var. virgata)
Synonym
Phacelia pinetorum
(Under Eucrypta micrantha)
Synonym
Phacelia pinnata var. pseudohispida
(Under Phacelia mutabilis)
Synonym
Phacelia platylobaNative
Phacelia polysperma
(Under Phacelia lemmonii)
Synonym
Phacelia pratensis
(Under Phacelia davidsonii)
Synonym
Phacelia pringleiNative
Phacelia pringlei var. orogenes
(Under Phacelia orogenes)
Synonym
Phacelia proceraNative
Phacelia pulchella var. gooddingiiGOODDING'S PHACELIANative
Phacelia purpusiiNative
Phacelia quickiiNative
Phacelia racemosaNative
Phacelia ramosissimaNative
Phacelia ramosissima var. austrolitoralis
(Under Phacelia ramosissima)
Synonym
Phacelia ramosissima var. eremophila
(Under Phacelia ramosissima)
Synonym
Phacelia ramosissima var. hispida
(Under Phacelia cicutaria var. hispida)
Synonym
Phacelia ramosissima var. latifolia
(Under Phacelia ramosissima)
Synonym
Phacelia ramosissima var. montereyensis
(Under Phacelia ramosissima)
Synonym
Phacelia ramosissima var. subglabra
(Under Phacelia ramosissima)
Synonym
Phacelia ramosissima var. suffrutescens
(Under Phacelia ramosissima)
Synonym
Phacelia ramosissima var. valida
(Under Phacelia ramosissima)
Synonym
Phacelia rattaniiNative
Phacelia rotundifoliaNative
Phacelia rugulosa
(Under Phacelia affinis)
Synonym
Phacelia salina
(Under Phacelia parishii)
Synonym
Phacelia saxicolaNative
Phacelia scabrella
(Under Phacelia distans)
Synonym
Phacelia sericea subsp. ciliosa
(Under Phacelia sericea var. ciliosa)
Synonym
Phacelia sericea var. biennis
(Under Phacelia hastata var. hastata)
Synonym
Phacelia sericea var. ciliosaBLUE ALPINE PHACELIANative
Phacelia sericea var. nelsonii
(Under Phacelia sericea var. ciliosa)
Synonym
Phacelia stebbinsiiSTEBBINS' PHACELIANative
Phacelia stellarisBRAND'S STAR PHACELIANative
Phacelia suaveolensNative
Phacelia suaveolens subsp. keckii
(Under Phacelia keckii)
Synonym
Phacelia suaveolens var. keckii
(Under Phacelia keckii)
Synonym
Phacelia tanacetifoliaNative
Phacelia tanacetifolia var. cinerea
(Under Phacelia tanacetifolia)
Synonym
Phacelia tanacetifolia var. hubbyi
(Under Phacelia hubbyi)
Synonym
Phacelia tanacetifolia var. pseudo-distans
(Under Phacelia tanacetifolia)
Synonym
Phacelia tanacetifolia var. tenuifolia
(Under Phacelia distans)
Synonym
Phacelia tenuifolia
(Under Phacelia distans)
Synonym
Phacelia tetrameraNative
Phacelia thermalisNative
Phacelia umbrosaNative
Phacelia vallicolaMARIPOSA PHACELIANative
Phacelia vallis-mortaeNative
Phacelia virgata
(Under Phacelia heterophylla var. virgata)
Synonym
Phacelia virgata var. ampliata
(Under Phacelia heterophylla var. virgata)
Synonym
Phacelia virgata var. bernardina
(Under Phacelia imbricata var. bernardina)
Synonym
Phacelia viscidaNative
Phacelia viscida var. albifloraNative
Phacelia viscida var. viscidaNative
Phacelia whitlavia
(Under Phacelia minor)
Synonym
Phacelia whitlavia var. jonesii
(Under Phacelia minor)
Synonym
Phalacroseris
Phalacroseris bolanderiBOLANDER'S MOCK DANDELIONNative
Phalacroseris bolanderi var. coronata
(Under Phalacroseris bolanderi)
Synonym
Phalaris
  ↳  Key to Phalaris
CANARY GRASS
Phalaris americana
(Under Phalaris caroliniana)
Synonym
Phalaris amethystina
(Under Phalaris californica)
Unabridged misapplied name
Phalaris angustaTIMOTHY CANARY GRASSNative
Phalaris aquaticaHARDING GRASSNaturalized
Phalaris arundinaceaREED CANARY GRASSNative
Phalaris brachystachysSHORT-SPIKED CANARY GRASSNaturalized
Phalaris bulbosa
(Under Phalaris aquatica)
Unabridged misapplied name
Phalaris bulbosa
(Under Phalaris coerulescens)
Illegitimate name
Phalaris californicaCALIFORNIA CANARY GRASSNative
Phalaris canariensisCANARY GRASSNaturalized
Phalaris carolinianaCAROLINA CANARY GRASSNaturalized
Phalaris coerulescensSUNOL GRASSNaturalized
Phalaris commutata
(Under Phalaris aquatica)
Synonym
Phalaris intermedia
(Under Phalaris caroliniana)
Synonym
Phalaris intermedia var. angusta
(Under Phalaris angusta)
Synonym
Phalaris intermedia var. angustata
(Under Phalaris angusta)
Synonym
Phalaris lemmoniiLEMMON'S CANARY GRASSNative
Phalaris microstachya
(Under Phalaris caroliniana)
Synonym
Phalaris minorLITTLE-SEEDED CANARY GRASSNaturalized
Phalaris occidentalis
(Under Phalaris caroliniana)
Synonym
Phalaris paradoxaHOOD CANARY GRASSNaturalized
Phalaris paradoxa var. coerulescens
(Under Phalaris coerulescens)
Synonym
Phalaris paradoxa var. praemorsa
(Under Phalaris paradoxa)
Synonym
Phalaris praemorsa
(Under Phalaris paradoxa)
Synonym
Phalaris stenoptera
(Under Phalaris aquatica)
Synonym
Phalaris trivialis
(Under Phalaris caroliniana)
Synonym
Phalaris tuberosa
(Under Phalaris aquatica)
Synonym
Phalaris tuberosa var. stenoptera
(Under Phalaris aquatica)
Synonym
PhaseolusWILD BEAN
Phaseolus carterae
(Under Phaseolus filiformis)
Synonym
Phaseolus filiformisSLENDER-STEM BEANNative
Phaseolus sanctorum
(Under Phaseolus filiformis)
Synonym
Phaseolus wrightii
(Under Phaseolus filiformis)
Synonym
PhelipancheBROOMRAPE
Phelipanche ramosaNaturalized
Philadelphus
  ↳  Key to Philadelphus
MOCK ORANGE
Philadelphus californicus
(Under Philadelphus lewisii)
Synonym
Philadelphus lewisiiWILD MOCK ORANGENative
Philadelphus lewisii subsp. californicus
(Under Philadelphus lewisii)
Synonym
Philadelphus lewisii subsp. gordonianus
(Under Philadelphus lewisii)
Synonym
Philadelphus microphyllusLITTLELEAF MOCK ORANGENative
Philadelphus microphyllus subsp. pumilus
(Under Philadelphus microphyllus)
Synonym
Philadelphus microphyllus subsp. stramineus
(Under Philadelphus microphyllus)
Synonym
Philadelphus microphyllus var. pumilus
(Under Philadelphus microphyllus)
Synonym
Philadelphus microphyllus var. stramineus
(Under Philadelphus microphyllus)
Synonym
Philadelphus pumilus
(Under Philadelphus microphyllus)
Synonym
Philadelphus stramineus
(Under Philadelphus microphyllus)
Synonym
Philibertella hartwegii
(Under Funastrum cynanchoides var. hartwegii)
Synonym
Philibertia heterophylla
(Under Funastrum cynanchoides var. hartwegii)
Synonym
Philibertia hirtella
(Under Funastrum hirtellum)
Synonym
Philibertia linearis var. hirtella
(Under Funastrum hirtellum)
Synonym
Phleum
  ↳  Key to Phleum
TIMOTHY
Phleum alpinumALPINE TIMOTHY, MOUNTAIN TIMOTHYNative
Phleum pratenseCULTIVATED TIMOTHYNaturalized
Phlox
  ↳  Key to Phlox
Phlox adsurgensNative
Phlox austromontanaNative
Phlox austromontana subsp. austromontana
(Under Phlox austromontana)
Synonym
Phlox austromontana subsp. prostrata
(Under Phlox austromontana)
Synonym
Phlox azurea
(Under Phlox diffusa)
Synonym
Phlox bryoides
(Under Phlox muscoides)
Synonym
Phlox caespitosa subsp. pulvinata
(Under Phlox pulvinata)
Synonym
Phlox caespitosa var. condensata
(Under Phlox condensata)
Synonym
Phlox condensataNative
Phlox covillei
(Under Phlox condensata)
Synonym
Phlox diffusaNative
Phlox dispersaHIGH SIERRA PHLOXNative
Phlox dolichanthaBIG BEAR VALLEY PHLOXNative
Phlox douglasiiNative
Phlox douglasii subsp. rigida
(Under Phlox douglasii)
Synonym
Phlox gracilis
(Under Microsteris gracilis)
Synonym
Phlox hirsutaYREKA PHLOXNative
Phlox hoodii subsp. canescensNative
Phlox hoodii subsp. lanata
(Under Phlox hoodii subsp. canescens)
Synonym
Phlox muscoidesSQUARESTEM PHLOXNative
Phlox pulvinataNative
Phlox rigida
(Under Phlox douglasii)
Synonym
Phlox speciosaNative
Phlox speciosa subsp. nitida
(Under Phlox speciosa)
Synonym
Phlox speciosa subsp. occidentalis
(Under Phlox speciosa)
Synonym
Phlox stansburyiNative
Phlox stansburyi subsp. stansburyiNative
Phlox stansburyi subsp. superbaNative
Phlox stansburyi var. brevifoliaNative
Phoenicaulis
Phoenicaulis cheiranthoidesNative
Phoenicaulis cheiranthoides subsp. glabra
(Under Phoenicaulis cheiranthoides)
Synonym
Phoenicaulis cheiranthoides var. lanuginosa
(Under Phoenicaulis cheiranthoides)
Synonym
Phoenicaulis eurycarpa
(Under Anelsonia eurycarpa)
Synonym
Phoenix
  ↳  Key to Phoenix
Phoenix canariensisCANARY ISLAND PALMNaturalized
Phoenix dactyliferaDATE PALMWaif
Pholisma
  ↳  Key to Pholisma
Pholisma arenariumNative
Pholisma sonoraeSAND FOODNative
Pholistoma
  ↳  Key to Pholistoma
Pholistoma auritumNative
Pholistoma auritum var. arizonicumARIZONA PHOLISTOMANative
Pholistoma auritum var. auritumFIESTA FLOWERNative
Pholistoma membranaceumNative
Pholistoma racemosumNative
Phoradendron
  ↳  Key to Phoradendron
MISTLETOE
Phoradendron bolleanumNative
Phoradendron bolleanum subsp. densum
(Under Phoradendron bolleanum)
Synonym
Phoradendron bolleanum subsp. pauciflorum
(Under Phoradendron bolleanum)
Synonym
Phoradendron bolleanum var. densum
(Under Phoradendron bolleanum)
Synonym
Phoradendron bolleanum var. pauciflorum
(Under Phoradendron bolleanum)
Synonym
Phoradendron californicumDESERT MISTLETOENative
Phoradendron californicum var. distans
(Under Phoradendron californicum)
Synonym
Phoradendron californicum var. leucocarpum
(Under Phoradendron californicum)
Synonym
Phoradendron densum
(Under Phoradendron bolleanum)
Synonym
Phoradendron juniperinumJUNIPER or INCENSE CEDAR MISTLETOENative
Phoradendron juniperinum var. ligatum
(Under Phoradendron juniperinum)
Synonym
Phoradendron leucarpumAMERICAN MISTLETOENative
Phoradendron leucarpum subsp. macrophyllumNative
Phoradendron leucarpum subsp. tomentosumNative
Phoradendron libocedri
(Under Phoradendron juniperinum)
Synonym
Phoradendron macrophyllum
(Under Phoradendron leucarpum subsp. macrophyllum)
Synonym
Phoradendron pauciflorum
(Under Phoradendron bolleanum)
Synonym
Phoradendron serotinum
(Under Phoradendron leucarpum)
Synonym
Phoradendron serotinum subsp. macrophyllum
(Under Phoradendron leucarpum subsp. macrophyllum)
Synonym
Phoradendron serotinum subsp. tomentosum
(Under Phoradendron leucarpum subsp. tomentosum)
Synonym
Phoradendron villosum
(Under Phoradendron leucarpum subsp. tomentosum)
Synonym
PhragmitesCOMMON REED, CARRIZO
Phragmites australisCOMMON REEDNative
Phragmites australis var. berlandieri
(Under Phragmites australis)
Synonym
Phragmites berlandieri
(Under Phragmites australis)
Synonym
Phragmites communis
(Under Phragmites australis)
Synonym
Phragmites communis var. berlandieri
(Under Phragmites australis)
Synonym
Phrymaceae
  ↳  Key to Phrymaceae
LOPSEED FAMILY
Phyla
  ↳  Key to Phyla
Phyla lanceolataNative
Phyla nodifloraNative
Phyla nodiflora var. canescens
(Under Phyla nodiflora)
Synonym
Phyla nodiflora var. incisa
(Under Phyla nodiflora)
Synonym
Phyla nodiflora var. reptans
(Under Phyla nodiflora)
Synonym
Phyla nodiflora var. rosea
(Under Phyla nodiflora)
Synonym
Phyllodoce
  ↳  Key to Phyllodoce
MOUNTAIN HEATHER
Phyllodoce breweriNative
Phyllodoce empetriformisNative
Phyllogonum luteolum
(Under Gilmania luteola)
Synonym
Phyllospadix
  ↳  Key to Phyllospadix
SURF-GRASS
Phyllospadix scouleriNative
Phyllospadix torreyiNative
Phyllostachys
Phyllostachys aureaFISHPOLE BAMBOO, GOLDEN BAMBOOAgricultural, garden, or urban weed
Physalis
  ↳  Key to Physalis
GROUND-CHERRY
Physalis acutifoliaNative
Physalis angulata var. lanceifolia
(Under Physalis lanceifolia)
Synonym
Physalis crassifoliaNative
Physalis crassifolia var. versicolor
(Under Physalis crassifolia)
Synonym
Physalis fendleri
(Under Physalis hederifolia var. fendleri)
Synonym
Physalis greenei
(Under Physalis crassifolia)
Synonym
Physalis hederifoliaNative
Physalis hederifolia var. cordifolia
(Under Physalis hederifolia var. fendleri)
Synonym
Physalis hederifolia var. fendleriNative
Physalis hederifolia var. palmeriNative
Physalis ixocarpa
(Under Physalis philadelphica)
Synonym
Physalis lanceifoliaNaturalized
Physalis lancifolia
(Under Physalis lanceifolia)
Orthographic variant
Physalis lobataLOBED GROUND-CHERRYNative
Physalis longifoliaWaif
Physalis mollis
(Under Physalis viscosa)
Synonym
Physalis philadelphicaTOMATILLONaturalized
Physalis pruinosa
(Under Physalis pubescens var. grisea)
Synonym
Physalis pubescensNaturalized
Physalis pubescens var. griseaNaturalized
Physalis pubescens var. integrifoliaNaturalized
Physalis viscosaGRAPE GROUND-CHERRYWaif
Physalis viscosa var. cinerascens
(Under Physalis viscosa)
Synonym
Physaria
  ↳  Key to Physaria
BLADDERPOD
Physaria chambersiiCHAMBERS' PHYSARIANative
Physaria cordiformisNative
Physaria kingiiNative
Physaria kingii subsp. bernardinaSAN BERNARDINO MOUNTAINS BLADDERPODNative
Physaria kingii subsp. kingiiNative
Physaria kingii subsp. latifoliaNative
Physaria ludovicianaSILVER BLADDERPODNative
Physaria occidentalis subsp. occidentalisNative
Physaria tenellaNative
Physaria wardii
(Under Physaria kingii subsp. latifolia)
Synonym
Physocarpus
  ↳  Key to Physocarpus
NINEBARK
Physocarpus alternansNEVADA NINEBARKNative
Physocarpus alternans subsp. annulatus
(Under Physocarpus alternans)
Synonym
Physocarpus alternans subsp. panamintensis
(Under Physocarpus alternans)
Synonym
Physocarpus capitatusNative
Phytolacca
  ↳  Key to Phytolacca
Phytolacca americana var. americanaPOKEWEEDNaturalized
Phytolacca heterotepalaMEXICAN POKEWEEDWaif
Phytolacca icosandraTROPICAL POKEWEEDNaturalized
PhytolaccaceaePOKEWEED FAMILY
Picea
  ↳  Key to Picea
SPRUCE
Picea brewerianaBREWER SPRUCENative
Picea engelmanniiENGELMANN SPRUCENative
Picea sitchensisSITKA SPRUCENative
PickeringiaCHAPARRAL PEA
Pickeringia montana
  ↳  Key to Pickeringia montana
CHAPARRAL PEANative
Pickeringia montana var. montanaNative
Pickeringia montana var. tomentosaWOOLLY CHAPARRAL PEANative
Picradeniopsis
Picradeniopsis multifloraNative
Picris echioides
(Under Helminthotheca echioides)
Synonym
PicrodendraceaeBITTER-TREE FAMILY
Picrothamnus desertorum
(Under Artemisia spinescens)
Synonym
Pilostyles
Pilostyles thurberiTHURBER'S PILOSTYLESNative
Pilularia
Pilularia americanaNative
Pinaceae
  ↳  Key to Pinaceae
PINE FAMILY
PinguiculaBUTTERWORT
Pinguicula macrocerasHORNED BUTTERWORTNative
Pinguicula macroceras subsp. macroceras
(Under Pinguicula macroceras)
Synonym
Pinguicula macroceras subsp. nortensis
(Under Pinguicula macroceras)
Synonym
Pinguicula vulgaris subsp. macroceras
(Under Pinguicula macroceras)
Synonym
Pinus
  ↳  Key to Pinus
PINE
Pinus albicaulisWHITEBARK PINENative
Pinus aristata
(Under Pinus longaeva)
Synonym, in part
Pinus attenuataKNOBCONE PINENative
Pinus balfourianaFOXTAIL PINENative
Pinus balfouriana subsp. austrinaNative
Pinus balfouriana subsp. balfourianaNative
Pinus benthamiana
(Under Pinus ponderosa var. pacifica)
Synonym
Pinus californiarum
(Under Pinus monophylla)
Synonym
Pinus contortaNative
Pinus contorta subsp. bolanderiBOLANDER'S BEACH PINENative
Pinus contorta subsp. contortaSHORE PINENative
Pinus contorta subsp. murrayanaLODGEPOLE PINENative
Pinus coulteriCOULTER PINENative
Pinus edulisCOLORADO PINYONNative
Pinus flexilisLIMBER PINENative
Pinus jeffreyiJEFFREY PINENative
Pinus lambertianaSUGAR PINENative
Pinus longaevaBRISTLECONE PINENative
Pinus monophyllaSINGLELEAF PINYON PINENative
Pinus monticolaWESTERN WHITE PINENative
Pinus muricataBISHOP PINENative
Pinus murrayana
(Under Pinus contorta subsp. murrayana)
Synonym
Pinus ponderosaPONDEROSA PINE, WESTERN YELLOW PINENative
Pinus ponderosa subsp. benthamiana
(Under Pinus ponderosa var. pacifica)
Synonym
Pinus ponderosa var. benthamiana
(Under Pinus ponderosa var. pacifica)
Synonym
Pinus ponderosa var. pacificaPACIFIC PONDEROSA PINENative
Pinus ponderosa var. ponderosaNORTH PLATEAU PONDEROSA PINENative
Pinus ponderosa var. washoensisWASHOE PINENative
Pinus quadrifoliaPARRY PINYON PINENative
Pinus radiataMONTEREY PINENative
Pinus remorata
(Under Pinus muricata)
Synonym
Pinus sabinianaGRAY, GHOST, or FOOTHILL PINENative
Pinus torreyanaNative
Pinus torreyana subsp. insularisSANTA ROSA ISLAND TORREY PINENative
Pinus torreyana subsp. torreyanaTORREY PINENative
Pinus washoensis
(Under Pinus ponderosa var. washoensis)
Synonym
Piperia
  ↳  Key to Piperia
PIPERIA
Piperia candidaWHITE-FLOWERED REIN-ORCHIDNative
Piperia colemaniiCOLEMAN'S REIN-ORCHIDNative
Piperia cooperiCHAPARRAL REIN-ORCHIDNative
Piperia elegansNative
Piperia elegans subsp. decurtataPOINT REYES REIN-ORCHIDNative
Piperia elegans subsp. elegansCOAST PIPERIA, ELEGANT PIPERIANative
Piperia elongataCHAPARRAL ORCHID, WOOD REIN-ORCHIDNative
Piperia leptopetalaNARROW-PETALED REIN-ORCHIDNative
Piperia michaeliiMICHAEL'S REIN-ORCHIDNative
Piperia transversaFLAT SPURRED PIPERIANative
Piperia unalascensisALASKA PIPERIA, SLENDER-SPIRE ORCHIDNative
Piperia yadoniiYADON'S REIN-ORCHIDNative
Piptatherum exiguum
(Under Stipa exigua)
Synonym
Piptatherum micranthum
(Under Stipa divaricata)
Synonym
Piptatherum miliaceum
(Under Stipa miliacea var. miliacea)
Synonym
Piptatherum miliaceum subsp. miliaceum
(Under Stipa miliacea var. miliacea)
Synonym
Piptochaetium setosum
(Under Stipa purpurata)
Synonym
Piptochaetium stipoides
(Under Stipa chaetophora)
Synonym
PistaciaPISTACHIO
Pistacia atlanticaNaturalized
PistiaWATER-LETTUCE
Pistia stratiotesWaif
PisumPEA
Pisum sativumCOMMON PEANaturalized
Pisum sativum var. arvense
(Under Pisum sativum)
Synonym
Pithecellobium minutum
(Under Vachellia farnesiana var. minuta)
Synonym
Pittosporaceae
  ↳  Key to Pittosporaceae
PITTOSPORUM FAMILY
Pittosporum
  ↳  Key to Pittosporum
Pittosporum crassifoliumNaturalized
Pittosporum tenuifoliumWaif
Pittosporum tobiraJAPANESE PITTOSPORUM, MOCK ORANGENaturalized
Pittosporum undulatumVICTORIAN BOX, MOCK ORANGENaturalized
Pityopus
Pityopus californicusCALIFORNIA PINEFOOTNative
Pityrogramma triangularis var. maxonii
(Under Pentagramma maxonii)
Synonym
Pityrogramma triangularis var. pallida
(Under Pentagramma pallida)
Synonym
Pityrogramma triangularis var. triangularis
(Under Pentagramma triangularis)
Synonym
Pityrogramma triangularis var. viscosa
(Under Pentagramma viscosa)
Synonym
Plagiobothrys
  ↳  Key to Plagiobothrys
POPCORNFLOWER
Plagiobothrys acanthocarpusADOBE POPCORNFLOWERNative
Plagiobothrys arizonicusARIZONA POPCORNFLOWERNative
Plagiobothrys austinae
(Under Plagiobothrys austiniae)
Orthographic variant
Plagiobothrys austiniaeAUSTIN'S SPINY-NUT POPCORNFLOWERNative
Plagiobothrys bracteatusBRACTED POPCORNFLOWERNative
Plagiobothrys bracteatus var. aculeolatus
(Under Plagiobothrys bracteatus)
Synonym
Plagiobothrys californicus
(Under Plagiobothrys collinus var. californicus)
Synonym
Plagiobothrys californicus var. fulvescens
(Under Plagiobothrys collinus var. fulvescens)
Synonym
Plagiobothrys californicus var. gracilis
(Under Plagiobothrys collinus var. gracilis)
Synonym
Plagiobothrys californicus var. ursinus
(Under Plagiobothrys collinus var. ursinus)
Synonym
Plagiobothrys canescensNative
Plagiobothrys canescens var. canescensVALLEY POPCORNFLOWERNative
Plagiobothrys canescens var. catalinensisSANTA CATALINA POPCORNFLOWERNative
Plagiobothrys chorisianusARTIST'S POPCORNFLOWERNative
Plagiobothrys chorisianus var. chorisianusCHORIS' POPCORNFLOWERNative
Plagiobothrys chorisianus var. hickmaniiHICKMAN'S POPCORNFLOWERNative
Plagiobothrys cognatusCOGNATE POPCORNFLOWERNative
Plagiobothrys collinusNative
Plagiobothrys collinus var. californicusCALIFORNIA POPCORNFLOWERNative
Plagiobothrys collinus var. fulvescensROUGH-STEMMED POPCORNFLOWERNative
Plagiobothrys collinus var. gracilisSAN DIEGO POPCORNFLOWERNative
Plagiobothrys collinus var. ursinusBEAR VALLEY POPCORNFLOWERNative
Plagiobothrys cusickiiCUSICK'S POPCORNFLOWERNative
Plagiobothrys diffususSAN FRANCISCO POPCORNFLOWERNative
Plagiobothrys distantiflorusMADERA POPCORNFLOWERNative
Plagiobothrys foliaceus
(Under Sonnea hispida)
Synonym
Plagiobothrys fulvus var. campestrisFIELD POPCORNFLOWERNative
Plagiobothrys glaberHAIRLESS POPCORNFLOWERNative
Plagiobothrys glyptocarpusSCULPTURED-NUT POPCORNFLOWERNative
Plagiobothrys glyptocarpus var. glyptocarpusNative
Plagiobothrys glyptocarpus var. modestusCEDAR RIDGE POPCORNFLOWERNative
Plagiobothrys greeneiGREENE'S SPINY-NUT POPCORNFLOWERNative
Plagiobothrys hispidulusHARSH POPCORNFLOWERNative
Plagiobothrys hispidus
(Under Sonnea hispida)
Synonym
Plagiobothrys humistratusLOW POPCORNFLOWERNative
Plagiobothrys hystriculusBEARDED POPCORNFLOWERNative
Plagiobothrys infectivusDYE POPCORNFLOWERNative
Plagiobothrys jonesii
(Under Simpsonanthus jonesii)
Synonym
Plagiobothrys kingii
(Under Amsinckiopsis kingii)
Synonym
Plagiobothrys kingii var. harknessii
(Under Amsinckiopsis kingii var. harknessii)
Synonym
Plagiobothrys kingii var. kingii
(Under Amsinckiopsis kingii var. kingii)
Synonym
Plagiobothrys leptocladusALKALI PLAGIOBOTHRYSNative
Plagiobothrys lithocaryusMAYACAMAS POPCORNFLOWERNative
Plagiobothrys mollisCREEPING POPCORNFLOWER, SOFT POPCORNFLOWERNative
Plagiobothrys mollis var. mollisNative
Plagiobothrys mollis var. vestitusPETALUMA POPCORNFLOWERNative
Plagiobothrys myosotoides
(Under Plagiobothrys verrucosus)
Misapplied name
Plagiobothrys myosotoides subsp. verrucosus
(Under Plagiobothrys verrucosus)
Synonym ined.
Plagiobothrys nitensSHINY-NUTLET POPCORNFLOWERNative
Plagiobothrys nothofulvusRUSTY POPCORNFLOWER, FOOTHILL SNOWDROPSNative
Plagiobothrys parishiiPARISH'S POPCORNFLOWERNative
Plagiobothrys reticulatusTRACY'S POPCORNFLOWERNative
Plagiobothrys reticulatus var. reticulatusNative
Plagiobothrys reticulatus var. rossianorumFORT ROSS POPCORNFLOWERNative
Plagiobothrys salsusDESERT POPCORNFLOWERNative
Plagiobothrys scouleri var. cusickii
(Under Plagiobothrys cusickii)
Synonym
Plagiobothrys scouleri var. hispidulus
(Under Plagiobothrys hispidulus)
Synonym
Plagiobothrys scouleri var. penicillatus
(Under Plagiobothrys cognatus)
Synonym, in part
Plagiobothrys scouleri var. penicillatus
(Under Plagiobothrys cusickii)
Synonym, in part
Plagiobothrys scouleri var. penicillatus
(Under Plagiobothrys hispidulus)
Synonym, in part
Plagiobothrys scouleri var. penicillatus
(Under Plagiobothrys nitens)
Synonym, in part
Plagiobothrys scouleri var. penicillatus
(Under Plagiobothrys reticulatus var. rossianorum)
Synonym, in part
Plagiobothrys scriptusSCRIDGEE'S POPCORNFLOWERNative
Plagiobothrys shastensisSHASTA POPCORNFLOWERNative
Plagiobothrys stipitatusGREAT VALLEY POPCORNFLOWERNative
Plagiobothrys stipitatus var. micranthusNative
Plagiobothrys stipitatus var. stipitatusSHOWY GREAT VALLEY POPCORNFLOWERNative
Plagiobothrys strictusCALISTOGA POPCORNFLOWERNative
Plagiobothrys tenellusPACIFIC POPCORNFLOWERNative
Plagiobothrys tenerSLENDER POPCORNFLOWERNative
Plagiobothrys tener var. subglaberSERPENTINE POPCORNFLOWERNative
Plagiobothrys tener var. tenerNative
Plagiobothrys torreyiHIGH SIERRA POPCORNFLOWERNative
Plagiobothrys torreyi var. diffususNative
Plagiobothrys torreyi var. perplexansCHAPARRAL POPCORNFLOWERNative
Plagiobothrys torreyi var. torreyiYOSEMITE POPCORNFLOWERNative
Plagiobothrys trachycarpusROUGH-NUTLET POPCORNFLOWERNative
Plagiobothrys uncinatusHOOKED POPCORNFLOWERNative
Plagiobothrys undulatusWAVY-STEMMED POPCORNFLOWERNative
Plagiobothrys verrucosusFORGET-ME-NOT POPCORNFLOWERNative
Planodes
Planodes virginicaNaturalized
Plantaginaceae
  ↳  Key to Plantaginaceae
PLANTAIN FAMILY
Plantago
  ↳  Key to Plantago
PLANTAIN
Plantago arenariaNaturalized
Plantago aristataNaturalized
Plantago bigelovii
(Under Plantago elongata)
Synonym
Plantago bigelovii subsp. bigelovii
(Under Plantago elongata)
Synonym
Plantago bigelovii subsp. californica
(Under Plantago elongata)
Synonym
Plantago bigelovii subsp. californica
(Under Plantago erecta)
Misapplied name
Plantago coronopusNaturalized
Plantago elongataNative
Plantago elongata subsp. elongata
(Under Plantago elongata)
Synonym
Plantago elongata subsp. pentasperma
(Under Plantago elongata)
Synonym
Plantago erectaNative
Plantago erecta subsp. rigidior
(Under Plantago erecta)
Synonym
Plantago eriopodaNative
Plantago fastigiata
(Under Plantago ovata var. fastigiata)
Synonym
Plantago hirtella var. galeottiana
(Under Plantago subnuda)
Synonym
Plantago hookeriana var. californica
(Under Plantago erecta)
Synonym
Plantago indica
(Under Plantago arenaria)
Superfluous name
Plantago insularis
(Under Plantago ovata var. insularis)
Synonym
Plantago insularis var. fastigiata
(Under Plantago ovata var. fastigiata)
Synonym
Plantago lanceolataENGLISH PLANTAINNaturalized
Plantago majorCOMMON PLANTAINNaturalized
Plantago major var. pilgeri
(Under Plantago major)
Synonym
Plantago major var. scopulorum
(Under Plantago major)
Synonym
Plantago maritimaNative
Plantago maritima var. californica
(Under Plantago maritima)
Synonym
Plantago maritima var. juncoides
(Under Plantago maritima)
Synonym
Plantago maritima var. maritima
(Under Plantago maritima)
Synonym
Plantago ovataNative
Plantago ovata var. fastigiataNative
Plantago ovata var. insularisNative
Plantago patagonicaNative
Plantago psyllium
(Under Plantago arenaria)
Synonym
Plantago purshii
(Under Plantago patagonica)
Synonym
Plantago purshii var. oblonga
(Under Plantago patagonica)
Synonym
Plantago purshii var. picta
(Under Plantago patagonica)
Synonym
Plantago pusillaNaturalized
Plantago rhodospermaNative
Plantago subnudaNative
Plantago truncata subsp. firmaNaturalized
Plantago virginicaNaturalized
PlatanaceaePLANE-TREE or SYCAMORE FAMILY
Platanthera
  ↳  Key to Platanthera
BOG-ORCHID
Platanthera dilatata var. leucostachysWHITE-FLOWERED BOG-ORCHIDNative
Platanthera foetida
(Under Piperia unalascensis)
Synonym
Platanthera gracilis
(Under Platanthera stricta)
Synonym
Platanthera hyperborea
(Under Platanthera tescamnis)
Misapplied name
Platanthera hyperborea var. purpurascens
(Under Platanthera yosemitensis)
Unabridged misapplied name
Platanthera leucostachys
(Under Platanthera dilatata var. leucostachys)
Synonym
Platanthera purpurascens
(Under Platanthera yosemitensis)
Unabridged misapplied name
Platanthera sparsifloraSPARSE-FLOWERED BOG-ORCHIDNative
Platanthera strictaSLENDER BOG-ORCHIDNative
Platanthera tescamnisNative
Platanthera yosemitensisYOSEMITE BOG-ORCHIDNative
Platanus
  ↳  Key to Platanus
Platanus ×acerifolia
(Under Platanus ×hispanica)
Synonym
Platanus ×hispanicaLONDON PLANE TREEWaif
Platanus ×hybrida
(Under Platanus ×hispanica)
Synonym
Platanus hispanica
(Under Platanus ×hispanica)
Synonym
Platanus racemosaWESTERN SYCAMORENative
Platystemon
Platystemon californicusCREAM CUPSNative
Platystemon californicus var. ciliatus
(Under Platystemon californicus)
Synonym
Platystemon californicus var. crinitus
(Under Platystemon californicus)
Synonym
Platystemon californicus var. horridulus
(Under Platystemon californicus)
Synonym
Platystemon californicus var. nutans
(Under Platystemon californicus)
Synonym
Platystemon californicus var. ornithopus
(Under Platystemon californicus)
Synonym
Platystemon californicus var. sphaerocarpus
(Under Platystemon californicus)
Synonym
Platystemon crinitus
(Under Platystemon californicus)
Synonym
Platystigma linearis
(Under Hesperomecon linearis)
Synonym
Plecostachys
Plecostachys serpyllifoliaPETITE-LICORICENaturalized
Plectritis
  ↳  Key to Plectritis
Plectritis brachystemon
(Under Plectritis congesta subsp. brachystemon)
Synonym
Plectritis ciliosaNative
Plectritis ciliosa subsp. ciliosa
(Under Plectritis ciliosa)
Synonym
Plectritis ciliosa subsp. insignis
(Under Plectritis ciliosa)
Synonym
Plectritis congestaNative
Plectritis congesta subsp. brachystemonNative
Plectritis congesta subsp. congestaSEA BLUSHNative
Plectritis congesta subsp. nitida
(Under Plectritis congesta subsp. brachystemon)
Synonym
Plectritis eichleriana
(Under Plectritis macrocera)
Synonym
Plectritis jepsonii
(Under Plectritis macrocera)
Synonym
Plectritis macroceraNative
Plectritis macrocera var. collina
(Under Plectritis macrocera)
Synonym
Plectritis macrocera var. grayi
(Under Plectritis macrocera)
Synonym
Plectritis macrocera var. mamillata
(Under Plectritis macrocera)
Synonym
Plectritis magna var. nitida
(Under Plectritis congesta subsp. brachystemon)
Synonym
Pleiacanthus
Pleiacanthus spinosusTHORNY SKELETONWEEDNative
Pleuraphis jamesii
(Under Hilaria jamesii)
Synonym
Pleuraphis rigida
(Under Hilaria rigida)
Synonym
Pleuricospora
Pleuricospora fimbriolataNative
PleurocoronisARROWLEAF
Pleurocoronis plurisetaNative
Pleuropogon
  ↳  Key to Pleuropogon
SEMAPHORE GRASS
Pleuropogon californicusNative
Pleuropogon californicus var. californicusNative
Pleuropogon californicus var. davyiDAVY'S SEMAPHORE GRASSNative
Pleuropogon davyi
(Under Pleuropogon californicus var. davyi)
Synonym
Pleuropogon hooverianusNORTH COAST SEMAPHORE GRASSNative
Pleuropogon refractusNODDING SEMAPHORE GRASSNative
Pluchea
  ↳  Key to Pluchea
Pluchea odorata var. odorataSALTMARSH-FLEABANENative
Pluchea sericeaARROW-WEEDNative
Plumbaginaceae
  ↳  Key to Plumbaginaceae
LEADWORT FAMILY
PlumbagoLEADWORT
Plumbago auriculataCAPE LEADWORTWaif
Pneumonanthe newberryi var. tiogana
(Under Gentiana newberryi var. tiogana)
Synonym
Poa
  ↳  Key to Poa
BLUE GRASS
Poa ×limosa
(Under Poa secunda subsp. juncifolia)
Synonym
Poa abbreviataDWARF BLUE GRASSNative
Poa abbreviata subsp. marshiiMARSH'S BLUE GRASSNative
Poa abbreviata subsp. pattersoniiPATTERSON'S BLUE GRASSNative
Poa alpina var. purpurascens
(Under Poa cusickii subsp. purpurascens)
Synonym
Poa annuaANNUAL BLUE GRASSNaturalized
Poa atropurpureaSAN BERNARDINO BLUE GRASSNative
Poa bigeloviiNative
Poa bolanderiNative
Poa bolanderi var. howellii
(Under Poa howellii)
Synonym
Poa bulbosaNaturalized
Poa bulbosa subsp. bulbosaWaif
Poa bulbosa subsp. viviparaNaturalized
Poa bulbosa var. bulbosa
(Under Poa bulbosa subsp. bulbosa)
Synonym
Poa bulbosa var. vivipara
(Under Poa bulbosa subsp. vivipara)
Synonym
Poa canbyi
(Under Poa secunda subsp. secunda)
Synonym
Poa compressaCANADIAN BLUE GRASSNaturalized
Poa confinisBEACH BLUE GRASSNative
Poa cusickiiNative
Poa cusickii subsp. cusickiiNative
Poa cusickii subsp. epilisSKYLINE BLUE GRASSNative
Poa cusickii subsp. pallidaNative
Poa cusickii subsp. purpurascensNative
Poa diaboliDIABLO CANYON BLUE GRASSNative
Poa douglasiiSAND DUNE BLUE GRASSNative
Poa douglasii subsp. macrantha
(Under Poa macrantha)
Synonym
Poa epilis
(Under Poa cusickii subsp. epilis)
Synonym
Poa fendlerianaNative
Poa fendleriana subsp. fendlerianaMUTTON GRASSNative
Poa fendleriana subsp. longiligulaLONG-TONGUE MUTTON GRASSNative
Poa glauca subsp. rupicolaTIMBERLINE BLUE GRASSNative
Poa gracillima
(Under Poa secunda subsp. secunda)
Synonym
Poa hansenii
(Under Poa cusickii subsp. cusickii)
Synonym
Poa howelliiNative
Poa incurva
(Under Poa secunda subsp. secunda)
Synonym
Poa infirmaWEAK BLUE GRASSNaturalized
Poa keckiiNative
Poa kelloggiiKELLOGG'S BLUE GRASSNative
Poa lemmonii
(Under Puccinellia lemmonii)
Synonym
Poa leptocoma subsp. leptocomaBOG BLUE GRASSNative
Poa lettermaniiLETTERMAN'S BLUE GRASSNative
Poa longiligula
(Under Poa fendleriana subsp. longiligula)
Synonym
Poa macranthaSEASHORE BLUE GRASSNative
Poa napensisNAPA BLUE GRASSNative
Poa nemoralisWOOD BLUE GRASSNaturalized
Poa nemoralis subsp. nemoralis
(Under Poa nemoralis)
Synonym
Poa nervosa
(Under Poa wheeleri)
Misapplied name
Poa palustrisFOWL BLUE GRASSNaturalized
Poa pattersonii
(Under Poa abbreviata subsp. pattersonii)
Synonym
Poa piperiPIPER'S BLUE GRASSNative
Poa pratensis subsp. pratensisKENTUCKY BLUE GRASSNaturalized
Poa pringleiNative
Poa purpurascens
(Under Poa cusickii subsp. purpurascens)
Illegitimate name
Poa rhizomataTIMBER BLUE GRASSNative
Poa rhizomata
(Under Poa piperi)
Misapplied name
Poa rupicola
(Under Poa glauca subsp. rupicola)
Synonym
Poa sandbergii
(Under Poa secunda subsp. secunda)
Synonym
Poa scabrella
(Under Poa secunda subsp. secunda)
Synonym
Poa secundaNEVADA BLUE GRASSNative
Poa secunda subsp. juncifoliaNative
Poa secunda subsp. secundaONE-SIDED BLUE GRASSNative
Poa sierraeSIERRA BLUE GRASSNative
Poa stebbinsiiNative
Poa subaristata
(Under Poa cusickii subsp. pallida)
Illegitimate name
Poa suksdorfii
(Under Poa keckii)
Misapplied name
Poa tenerrimaDELICATE BLUE GRASSNative
Poa trivialisROUGH BLUE GRASSNaturalized
Poa unilateralis subsp. unilateralisSAN FRANCISCO BLUE GRASSNative
Poa wheeleriNative
Poaceae (Gramineae)
  ↳  Key to Poaceae (Gramineae)
GRASS FAMILY
Podagrostis humilis
(Under Agrostis humilis)
Synonym
Podagrostis thurberiana
(Under Agrostis humilis)
Synonym
Podistera
Podistera nevadensisSIERRA PODISTERANative
Pogogyne
  ↳  Key to Pogogyne
BEARDSTYLE, MESA MINT
Pogogyne abramsiiSAN DIEGO MESA MINTNative
Pogogyne clareanaSANTA LUCIA MINTNative
Pogogyne douglasiiDOUGLAS' BEARDSTYLENative
Pogogyne floribundaPROFUSE-FLOWERED POGOGYNENative
Pogogyne nudiusculaOTAY MESA MINTNative
Pogogyne serpylloidesTHYMELEAF BEARDSTYLENative
Pogogyne serpylloides subsp. intermedia
(Under Pogogyne serpylloides)
Synonym
Pogogyne zizyphoroidesSACRAMENTO BEARDSTYLENative
Poinciana gilliesii
(Under Caesalpinia gilliesii)
Synonym
Poinciana spinosa
(Under Caesalpinia spinosa)
Synonym
Polanisia
Polanisia dodecandra subsp. trachyspermaWESTERN CLAMMYWEEDNative
Polanisia trachysperma
(Under Polanisia dodecandra subsp. trachysperma)
Synonym
Polemoniaceae
  ↳  Key to Polemoniaceae
PHLOX FAMILY
Polemonium
  ↳  Key to Polemonium
Polemonium californicumNative
Polemonium carneumOREGON POLEMONIUMNative
Polemonium chartaceumMASON'S SKY PILOTNative
Polemonium eddyenseMOUNT EDDY SKY PILOTNative
Polemonium eximiumNative
Polemonium micranthumNative
Polemonium occidentaleNative
Polemonium occidentale subsp. occidentale
(Under Polemonium occidentale)
Synonym
Polemonium pulcherrimumNative
Polemonium pulcherrimum var. pulcherrimumNative
Polemonium pulcherrimum var. shastenseNative
Polemonium shastense
(Under Polemonium pulcherrimum var. shastense)
Synonym
Poliomintha
Poliomintha incanaFROSTED MINTNative
PolycarponPOLYCARP
Polycarpon depressum
(Under Polycarpon tetraphyllum subsp. depressum)
Synonym
Polycarpon tetraphyllum
  ↳  Key to Polycarpon tetraphyllum
Native
Polycarpon tetraphyllum subsp. depressumNative
Polycarpon tetraphyllum subsp. tetraphyllumFOUR-LEAVED ALLSEEDNaturalized
Polyctenium
Polyctenium fremontiiNative
Polyctenium fremontii var. confertum
(Under Polyctenium fremontii)
Synonym
Polyctenium fremontii var. fremontii
(Under Polyctenium fremontii)
Synonym
Polyctenium williamsiae
(Under Polyctenium fremontii)
Synonym
Polygala acanthoclada
(Under Rhinotropis acanthoclada)
Synonym
Polygala acanthoclada var. intricata
(Under Rhinotropis intermontana)
Synonym
Polygala californica
(Under Rhinotropis californica)
Synonym
Polygala cornuta
(Under Rhinotropis cornuta)
Synonym
Polygala cornuta subsp. fishiae
(Under Rhinotropis cornuta var. fishiae)
Synonym
Polygala cornuta var. cornuta
(Under Rhinotropis cornuta var. cornuta)
Synonym
Polygala cornuta var. fishiae
(Under Rhinotropis cornuta var. fishiae)
Synonym
Polygala heterorhyncha
(Under Rhinotropis heterorhyncha)
Synonym
Polygala intermontana
(Under Rhinotropis intermontana)
Synonym
Polygala subspinosa
(Under Rhinotropis subspinosa)
Synonym
Polygala subspinosa var. heterorhyncha
(Under Rhinotropis heterorhyncha)
Synonym
PolygalaceaeMILKWORT FAMILY
Polygonaceae
  ↳  Key to Polygonaceae
BUCKWHEAT FAMILY
Polygonum
  ↳  Key to Polygonum
KNOTWEED
Polygonum aequale
(Under Polygonum aviculare subsp. depressum)
Synonym
Polygonum amphibium
(Under Persicaria amphibia)
Synonym
Polygonum amphibium var. emersum
(Under Persicaria amphibia)
Synonym
Polygonum amphibium var. stipulaceum
(Under Persicaria amphibia)
Synonym
Polygonum arenastrum
(Under Polygonum aviculare subsp. depressum)
Synonym
Polygonum argyrocoleonPERSIAN KNOTWEEDNaturalized
Polygonum aubertii
(Under Fallopia baldschuanica)
Synonym
Polygonum austiniaeMRS. AUSTIN'S KNOTWEEDNative
Polygonum aviculareKNOTWEED, KNOTGRASSNaturalized
Polygonum aviculare subsp. aviculareNaturalized
Polygonum aviculare subsp. buxiformeWaif
Polygonum aviculare subsp. depressumNaturalized
Polygonum aviculare subsp. neglectumWaif
Polygonum aviculare subsp. rectum
(Under Polygonum aviculare subsp. neglectum)
Synonym
Polygonum aviculare subsp. rurivagumWaif
Polygonum baldschuanicum
(Under Fallopia baldschuanica)
Synonym
Polygonum bidwelliaeBIDWELL'S KNOTWEEDNative
Polygonum bistortoides
(Under Bistorta bistortoides)
Synonym
Polygonum bolanderiBOLANDER'S KNOTWEEDNative
Polygonum buxiforme
(Under Polygonum aviculare subsp. buxiforme)
Synonym
Polygonum calcatum
(Under Polygonum aviculare subsp. depressum)
Synonym
Polygonum californicumNative
Polygonum capitatum
(Under Persicaria capitata)
Synonym
Polygonum confertiflorum
(Under Polygonum polygaloides subsp. confertiflorum)
Synonym
Polygonum convolvulus
(Under Fallopia convolvulus)
Synonym
Polygonum cuspidatum
(Under Fallopia japonica)
Synonym
Polygonum davisiae
(Under Aconogonon davisiae)
Synonym
Polygonum douglasiiDOUGLAS' KNOTWEEDNative
Polygonum douglasii subsp. austiniae
(Under Polygonum austiniae)
Synonym
Polygonum douglasii subsp. douglasii
(Under Polygonum douglasii)
Synonym
Polygonum douglasii subsp. johnstonii
(Under Polygonum sawatchense subsp. sawatchense)
Synonym
Polygonum douglasii subsp. majus
(Under Polygonum majus)
Synonym
Polygonum douglasii subsp. spergulariiforme
(Under Polygonum spergulariiforme)
Synonym
Polygonum douglasii var. johnstonii
(Under Polygonum sawatchense subsp. sawatchense)
Synonym
Polygonum douglasii var. latifolium
(Under Polygonum douglasii)
Synonym
Polygonum emaciatum
(Under Polygonum douglasii)
Synonym
Polygonum esotericum
(Under Polygonum polygaloides subsp. esotericum)
Synonym
Polygonum exile
(Under Polygonum sawatchense subsp. sawatchense)
Synonym
Polygonum exsertum
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym
Polygonum fowleri subsp. fowleriWaif
Polygonum fusiforme
(Under Persicaria maculosa)
Synonym
Polygonum hickmaniiSCOTTS VALLEY POLYGONUMNative
Polygonum hydropiper
(Under Persicaria hydropiper)
Synonym
Polygonum hydropiperoides
(Under Persicaria hydropiperoides)
Synonym
Polygonum hydropiperoides var. asperifolia
(Under Persicaria hydropiperoides)
Synonym
Polygonum interior
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym
Polygonum kelloggii
(Under Polygonum polygaloides subsp. kelloggii)
Synonym
Polygonum kelloggii var. confertiflorum
(Under Polygonum polygaloides subsp. confertiflorum)
Synonym
Polygonum lapathifolium
(Under Persicaria lapathifolia)
Synonym
Polygonum lapathifolium var. salicifolium
(Under Persicaria lapathifolia)
Synonym
Polygonum latum
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym
Polygonum leptocarpum
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym
Polygonum majusWIRY KNOTWEEDNative
Polygonum marinenseMARIN KNOTWEEDNative
Polygonum microspermum
(Under Polygonum aviculare subsp. depressum)
Synonym
Polygonum minimumNative
Polygonum montanum
(Under Polygonum douglasii)
Synonym
Polygonum neglectum
(Under Polygonum aviculare subsp. neglectum)
Synonym
Polygonum newberryi
(Under Aconogonon newberryi)
Synonym
Polygonum omissum
(Under Persicaria pensylvanica)
Synonym
Polygonum paronychiaNative
Polygonum parryiPARRY'S or PRICKLY KNOTWEEDNative
Polygonum patulum
(Under Polygonum ramosissimum)
Misapplied name
Polygonum pensylvanicum
(Under Persicaria pensylvanica)
Synonym
Polygonum pensylvanicum var. durum
(Under Persicaria pensylvanica)
Synonym
Polygonum pensylvanicum var. eglandulosum
(Under Persicaria pensylvanica)
Synonym
Polygonum pensylvanicum var. laevigatum
(Under Persicaria pensylvanica)
Synonym
Polygonum pensylvanicum var. nesophilum
(Under Persicaria pensylvanica)
Synonym
Polygonum pensylvanicum var. rosiflorum
(Under Persicaria pensylvanica)
Synonym
Polygonum persicaria
(Under Persicaria maculosa)
Synonym
Polygonum phytolaccifolium
(Under Aconogonon phytolaccifolium)
Synonym
Polygonum polygaloidesPOLYGALA KNOTWEEDNative
Polygonum polygaloides subsp. confertiflorumNative
Polygonum polygaloides subsp. esotericumMODOC COUNTY KNOTWEEDNative
Polygonum polygaloides subsp. kelloggiiNative
Polygonum polystachyum
(Under Persicaria wallichii)
Synonym
Polygonum prolificum
(Under Polygonum ramosissimum subsp. prolificum)
Synonym
Polygonum punctatum
(Under Persicaria punctata)
Synonym
Polygonum punctatum var. confertiflorum
(Under Persicaria punctata)
Synonym
Polygonum punctatum var. ellipticum
(Under Persicaria punctata)
Synonym
Polygonum punctatum var. leptostachyum
(Under Persicaria punctata)
Synonym
Polygonum punctatum var. parviflorum
(Under Persicaria punctata)
Synonym
Polygonum puritanorum
(Under Persicaria maculosa)
Synonym
Polygonum ramosissimumBUSHY KNOTWEEDNative
Polygonum ramosissimum subsp. prolificumNaturalized
Polygonum ramosissimum subsp. ramosissimumNative
Polygonum ramosissimum var. prolificum
(Under Polygonum ramosissimum subsp. prolificum)
Synonym
Polygonum rurivagum
(Under Polygonum aviculare subsp. rurivagum)
Synonym
Polygonum sachalinense
(Under Fallopia sachalinensis)
Synonym
Polygonum sawatchenseNative
Polygonum sawatchense subsp. obliviumNative
Polygonum sawatchense subsp. sawatchenseNative
Polygonum scabrum
(Under Persicaria lapathifolia)
Synonym
Polygonum shastenseNative
Polygonum spergulariiformeNative
Polygonum stevensii
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym
Polygonum torreyi
(Under Polygonum minimum)
Synonym
Polygonum triandrum
(Under Polygonum sawatchense subsp. sawatchense)
Synonym
Polygonum triangulum
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym
Polygonum unifolium
(Under Polygonum polygaloides subsp. kelloggii)
Synonym
Polygonum watsonii
(Under Polygonum polygaloides subsp. confertiflorum)
Synonym
PolypodiaceaePOLYPODY FAMILY
Polypodium
  ↳  Key to Polypodium
POLYPODY
Polypodium californicumCALIFORNIA POLYPODYNative
Polypodium calirhizaNative
Polypodium glycyrrhizaLICORICE FERNNative
Polypodium hesperiumWESTERN POLYPODYNative
Polypodium scouleriLEATHER-LEAF FERNNative
Polypodium vulgare var. columbianum
(Under Polypodium hesperium)
Synonym
Polypogon
  ↳  Key to Polypogon
BEARD GRASS
Polypogon australisCHILEAN BEARD GRASSNaturalized
Polypogon elongatus
(Under Polypogon imberbis)
Misapplied name
Polypogon imberbisNaturalized
Polypogon interruptusDITCH BEARD GRASSNative
Polypogon maritimusMEDITERRANEAN BEARD GRASSNaturalized
Polypogon monspeliensisANNUAL BEARD GRASS, RABBITFOOT GRASSNaturalized
Polypogon semiverticillatus
(Under Polypogon viridis)
Synonym
Polypogon viridisWATER BEARD GRASSNaturalized
Polystichum
  ↳  Key to Polystichum
SWORD FERN
Polystichum californicumNative
Polystichum dudleyiNative
Polystichum imbricansNative
Polystichum imbricans subsp. curtumNative
Polystichum imbricans subsp. imbricansNative
Polystichum kruckebergiiKRUCKEBERG'S SWORD FERNNative
Polystichum lemmoniiNative
Polystichum lonchitisHOLLY FERNNative
Polystichum munitumWESTERN SWORD FERNNative
Polystichum munitum subsp. imbricans
(Under Polystichum imbricans subsp. imbricans)
Synonym
Polystichum munitum subsp. nudatum
(Under Polystichum imbricans subsp. imbricans)
Synonym
Polystichum scopulinumNative
Pontederiaceae
  ↳  Key to Pontederiaceae
PICKEREL-WEED FAMILY
Populus
  ↳  Key to Populus
COTTONWOOD
Populus albaWHITE POPLARNaturalized
Populus angustifoliaNARROW-LEAVED COTTONWOODNative
Populus balsamifera subsp. trichocarpa
(Under Populus trichocarpa)
Synonym
Populus deltoides var. fremontii
(Under Populus fremontii subsp. fremontii)
Synonym
Populus fremontii subsp. fremontiiALAMO or FREMONT COTTONWOODNative
Populus fremontii var. arizonica
(Under Populus fremontii subsp. fremontii)
Synonym
Populus fremontii var. macdougalii
(Under Populus fremontii subsp. fremontii)
Synonym
Populus nigraBLACK POPLAR, LOMBARDY POPLARNaturalized
Populus nigra var. italica
(Under Populus nigra)
Synonym
Populus tremuloidesQUAKING ASPENNative
Populus trichocarpaBLACK COTTONWOODNative
Porophyllum
  ↳  Key to Porophyllum
Porophyllum gracileODORA, SLENDER PORELEAFNative
Porophyllum ruderale var. macrocephalumYERBA POROSAAgricultural weed
Porterella
Porterella carnosulaNative
Portulaca
  ↳  Key to Portulaca
Portulaca granulato-stellulata
(Under Portulaca oleracea)
Synonym
Portulaca halimoidesDESERT PORTULACANative
Portulaca nitida
(Under Portulaca oleracea)
Synonym
Portulaca oleraceaPURSLANENaturalized
Portulaca oleracea subsp. granulato-stellulata
(Under Portulaca oleracea)
Synonym
Portulaca oleracea subsp. nitida
(Under Portulaca oleracea)
Synonym
Portulaca oleracea subsp. oleracea
(Under Portulaca oleracea)
Synonym
Portulaca oleracea subsp. papillato-stellulata
(Under Portulaca oleracea)
Synonym
Portulaca papillato-stellulata
(Under Portulaca oleracea)
Synonym
Portulaca parvula
(Under Portulaca halimoides)
Synonym
Portulaca retusa
(Under Portulaca oleracea)
Synonym
PortulacaceaePURSLANE FAMILY
Potamogeton
  ↳  Key to Potamogeton
PONDWEED
Potamogeton alpinusNative
Potamogeton alpinus subsp. tenuifolius
(Under Potamogeton alpinus)
Synonym
Potamogeton alpinus var. subellipticus
(Under Potamogeton alpinus)
Synonym
Potamogeton alpinus var. tenuifolius
(Under Potamogeton alpinus)
Synonym
Potamogeton amplifoliusBROAD-LEAVED PONDWEEDNative
Potamogeton berchtoldiiNative
Potamogeton crispusCRISP-LEAVED PONDWEEDNaturalized
Potamogeton diversifoliusDIVERSE-LEAVED PONDWEEDNative
Potamogeton epihydrusNUTTALL'S RIBBON-LEAVED PONDWEEDNative
Potamogeton epihydrus subsp. nuttallii
(Under Potamogeton epihydrus)
Synonym
Potamogeton fibrillosus
(Under Potamogeton foliosus subsp. fibrillosus)
Synonym
Potamogeton filiformis var. alpinus
(Under Stuckenia filiformis subsp. alpina)
Synonym
Potamogeton filiformis var. macounii
(Under Stuckenia filiformis subsp. alpina)
Synonym
Potamogeton foliosusLEAFY PONDWEEDNative
Potamogeton foliosus subsp. fibrillosusFIBROUS PONDWEEDNative
Potamogeton foliosus subsp. foliosusNative
Potamogeton foliosus var. fibrillosus
(Under Potamogeton foliosus subsp. fibrillosus)
Synonym
Potamogeton foliosus var. foliosus
(Under Potamogeton foliosus subsp. foliosus)
Synonym
Potamogeton gramineusGRASS-LEAVED PONDWEEDNative
Potamogeton illinoensisSHINING PONDWEEDNative
Potamogeton latifolius
(Under Stuckenia striata)
Synonym
Potamogeton natansFLOATING-LEAVED PONDWEEDNative
Potamogeton nodosusLONG-LEAVED PONDWEEDNative
Potamogeton pectinatus
(Under Stuckenia pectinata)
Synonym
Potamogeton praelongusWHITE-STEMMED PONDWEEDNative
Potamogeton pusillusSMALL PONDWEEDNative
Potamogeton pusillus subsp. pusillus
(Under Potamogeton pusillus)
Synonym
Potamogeton pusillus subsp. tenuissimus
(Under Potamogeton berchtoldii)
Synonym
Potamogeton pusillus var. pusillus
(Under Potamogeton pusillus)
Synonym
Potamogeton pusillus var. tenuissimus
(Under Potamogeton berchtoldii)
Synonym
Potamogeton richardsoniiRICHARDSON'S PONDWEEDNative
Potamogeton robbinsiiROBBINS' PONDWEEDNative
Potamogeton zosteriformisEEL-GRASS PONDWEEDNative
Potamogetonaceae
  ↳  Key to Potamogetonaceae
PONDWEED FAMILY
Potentilla
  ↳  Key to Potentilla
CINQUEFOIL
Potentilla anglicaENGLISH CINQUEFOILNaturalized
Potentilla anserinaNative
Potentilla anserina subsp. anserinaCOMMON SILVERWEEDNative
Potentilla anserina subsp. pacificaPACIFIC SILVERWEEDNative
Potentilla anserina var. sericea
(Under Potentilla anserina subsp. anserina)
Synonym
Potentilla basalticaBLACK ROCK POTENTILLANative
Potentilla beanii
(Under Potentilla concinna var. proxima)
Synonym
Potentilla biennisBIENNIAL or GREENE'S CINQUEFOILNative
Potentilla breweriBREWER'S CINQUEFOILNative
Potentilla bruceaeBRUCE'S CINQUEFOILNative
Potentilla callida
(Under Ivesia callida)
Synonym
Potentilla concinna var. proximaEARLY CINQUEFOILNative
Potentilla cristaeCRESTED POTENTILLANative
Potentilla diversifolia
(Under Potentilla glaucophylla var. glaucophylla)
Misapplied name
Potentilla drummondiiDRUMMOND'S CINQUEFOILNative
Potentilla drummondii subsp. breweri
(Under Potentilla breweri)
Synonym
Potentilla drummondii subsp. bruceae
(Under Potentilla bruceae)
Synonym
Potentilla egedei var. grandis
(Under Potentilla anserina subsp. pacifica)
Synonym
Potentilla elata var. dissita
(Under Horkelia californica var. elata)
Synonym
Potentilla flabellifoliaFAN-FOIL, FANLEAF CINQUEFOILNative
Potentilla flabellifolia var. grayi
(Under Potentilla grayi)
Synonym
Potentilla flabelliformis
(Under Potentilla gracilis var. flabelliformis)
Synonym
Potentilla flabelliformis var. inyoensis
(Under Potentilla gracilis var. elmeri)
Synonym
Potentilla frondosa
(Under Horkelia californica var. frondosa)
Synonym
Potentilla fruticosa
(Under Dasiphora fruticosa)
Synonym
Potentilla glandulosa
(Under Drymocallis glandulosa)
Synonym
Potentilla glandulosa subsp. ashlandica
(Under Drymocallis lactea var. austiniae)
Misapplied name
Potentilla glandulosa subsp. ewanii
(Under Drymocallis cuneifolia var. ewanii)
Synonym
Potentilla glandulosa subsp. glandulosa
(Under Drymocallis glandulosa var. glandulosa)
Synonym
Potentilla glandulosa subsp. globosa
(Under Drymocallis rhomboidea)
Synonym
Potentilla glandulosa subsp. hansenii
(Under Drymocallis hansenii)
Synonym
Potentilla glandulosa subsp. nevadensis
(Under Drymocallis lactea var. lactea)
Synonym
Potentilla glandulosa subsp. pseudorupestris
(Under Drymocallis pseudorupestris)
Synonym
Potentilla glandulosa subsp. reflexa
(Under Drymocallis glandulosa var. reflexa)
Synonym
Potentilla glaucophylla var. glaucophyllaBLUELEAF CINQUEFOILNative
Potentilla gracilisSLENDER CINQUEFOILNative
Potentilla gracilis subsp. nuttallii
(Under Potentilla gracilis var. fastigiata)
Synonym
Potentilla gracilis var. elmeriNative
Potentilla gracilis var. fastigiataNative
Potentilla gracilis var. flabelliformisNative
Potentilla gracilis var. glabrata
(Under Potentilla gracilis var. fastigiata)
Synonym
Potentilla gracilis var. gracilisNative
Potentilla gracilis var. permollis
(Under Potentilla gracilis var. fastigiata)
Synonym
Potentilla gracilis var. pulcherrima
(Under Potentilla pulcherrima)
Synonym
Potentilla grayiGRAY'S CINQUEFOILNative
Potentilla hickmaniiHICKMAN'S CINQUEFOILNative
Potentilla howellii
(Under Horkelia sericata)
Synonym
Potentilla jepsoniiJEPSON'S CINQUEFOILNative
Potentilla millefoliaFEATHER CINQUEFOILNative
Potentilla morefieldiiMOREFIELD'S CINQUEFOILNative
Potentilla multijugaBALLONA CINQUEFOILNative
Potentilla newberryiNEWBERRY'S CINQUEFOILNative
Potentilla norvegicaNORWEGIAN or ROUGH CINQUEFOILNaturalized
Potentilla norvegica subsp. monspeliensis
(Under Potentilla norvegica)
Synonym
Potentilla palustris
(Under Comarum palustre)
Synonym
Potentilla patellifera
(Under Ivesia patellifera)
Synonym
Potentilla pectinisecta
(Under Potentilla gracilis var. elmeri)
Synonym
Potentilla peirsonii
(Under Drymocallis cuneifolia var. cuneifolia)
Synonym
Potentilla pensylvanicaPRAIRIE CINQUEFOILNative
Potentilla pensylvanica var. ovium
(Under Potentilla jepsonii)
Synonym
Potentilla pseudosericeaMONO CINQUEFOILNative
Potentilla pulcherrimaBEAUTIFUL CINQUEFOILNative
Potentilla rectaSULPHUR CINQUEFOILNaturalized
Potentilla rhomboidea
(Under Drymocallis rhomboidea)
Synonym
Potentilla rimicolaCLIFF CINQUEFOILNative
Potentilla rivalisBROOK or RIVER CINQUEFOILNative
Potentilla rivalis var. millegrana
(Under Potentilla rivalis)
Synonym
Potentilla rosulata
(Under Ivesia saxosa)
Synonym
Potentilla saxosa
(Under Ivesia saxosa)
Synonym
Potentilla saxosa subsp. sierrae
(Under Ivesia saxosa)
Synonym
Potentilla subvillosa
(Under Potentilla bruceae)
Synonym
Potentilla uliginosaCUNNINGHAM MARSH CINQUEFOILNative
Potentilla wheeleriWHEELER'S CINQUEFOILNative
Potentilla wheeleri var. rimicola
(Under Potentilla rimicola)
Synonym
Poteridium
Poteridium annuumWESTERN BURNETNative
Poterium
Poterium sanguisorbaGARDEN BURNETNaturalized
Prenanthella
Prenanthella exiguaBRIGHTWHITENative
Primula
  ↳  Key to Primula
PRIMROSE, SHOOTING STAR
Primula clevelandiiNative
Primula clevelandii var. clevelandiiNative
Primula clevelandii var. gracilisNative
Primula clevelandii var. insularisNative
Primula clevelandii var. patulaNative
Primula conjugensNative
Primula fragransNative
Primula hendersoniiMOSQUITO BILL(S), SAILOR CAPSNative
Primula jeffreyiSIERRA SHOOTING STARNative
Primula paucifloraBEAUTIFUL SHOOTING STARNative
Primula pauciflora var. macrocarpa
(Under Primula pauciflora)
Synonym
Primula pauciflora var. monantha
(Under Primula pauciflora)
Synonym
Primula pauciflora var. shoshonensis
(Under Primula pauciflora)
Synonym
Primula subalpinaNative
Primula suffrutescensSIERRA PRIMROSENative
Primula tetrandraALPINE SHOOTING STARNative
Primulaceae
  ↳  Key to Primulaceae
PRIMROSE FAMILY
Proboscidea
  ↳  Key to Proboscidea
UNICORN-PLANT
Proboscidea althaeifoliaDESERT UNICORN-PLANTNative
Proboscidea altheaefolia
(Under Proboscidea althaeifolia)
Orthographic variant
Proboscidea louisianica subsp. louisianicaNaturalized
Proboscidea luteaNaturalized
Prosartes
  ↳  Key to Prosartes
Prosartes hookeriNative
Prosartes hookeri var. hookeri
(Under Prosartes hookeri)
Synonym
Prosartes hookeri var. parvifolia
(Under Prosartes parvifolia)
Synonym
Prosartes hookeri var. trachyandra
(Under Prosartes hookeri)
Synonym
Prosartes parvifoliaSISKIYOU BELLSNative
Prosartes smithiiNative
Prosopis glandulosa var. torreyana
(Under Neltuma odorata)
Synonym
Prosopis juliflora var. torreyana
(Under Neltuma odorata)
Synonym
Prosopis juliflora var. velutina
(Under Neltuma velutina)
Synonym
Prosopis pubescens
(Under Strombocarpa pubescens)
Synonym
Prosopis strombulifera
(Under Strombocarpa strombulifera)
Synonym
Prosopis velutina
(Under Neltuma velutina)
Synonym
ProteaceaePROTEA FAMILY
PrunellaSELF-HEAL
Prunella vulgaris
  ↳  Key to Prunella vulgaris
Native
Prunella vulgaris subsp. lanceolata
(Under Prunella vulgaris var. lanceolata)
Synonym
Prunella vulgaris var. atropurpurea
(Under Prunella vulgaris var. lanceolata)
Synonym
Prunella vulgaris var. lanceolataNative
Prunella vulgaris var. parviflora
(Under Prunella vulgaris var. vulgaris)
Synonym
Prunella vulgaris var. vulgarisNaturalized
Prunus
  ↳  Key to Prunus
Prunus amygdalus
(Under Prunus dulcis)
Synonym
Prunus andersoniiDESERT PEACHNative
Prunus cerasiferaCHERRY PLUMNaturalized
Prunus dulcisALMONDNaturalized
Prunus emarginataBITTER CHERRYNative
Prunus eremophilaMOJAVE DESERT PLUMNative
Prunus fasciculataDESERT ALMONDNative
Prunus fasciculata var. fasciculataNative
Prunus fasciculata var. punctataSAND ALMONDNative
Prunus fremontiiDESERT APRICOTNative
Prunus ilicifoliaNative
Prunus ilicifolia subsp. ilicifoliaISLAY, HOLLY-LEAFED CHERRYNative
Prunus ilicifolia subsp. lyoniiCATALINA CHERRYNative
Prunus lyonii
(Under Prunus ilicifolia subsp. lyonii)
Synonym
Prunus persicaPEACHNaturalized
Prunus subcordataPACIFIC PLUM, SIERRA PLUMNative
Prunus virginiana var. demissaWESTERN CHOKE CHERRYNative
Psathyrotes
  ↳  Key to Psathyrotes
Psathyrotes annuaNative
Psathyrotes ramosissimaTURTLEBACKNative
Pseudobahia
  ↳  Key to Pseudobahia
Pseudobahia bahiifoliaHARTWEG'S GOLDEN SUNBURSTNative
Pseudobahia bahiifolia var. pinnatifida
(Under Pseudobahia heermannii)
Synonym ined.
Pseudobahia heermanniiFOOTHILL SUNBURST, BRITTLESTEMNative
Pseudobahia peirsoniiSAN JOAQUIN ADOBE SUNBURSTNative
Pseudognaphalium
  ↳  Key to Pseudognaphalium
CUDWEED, EVERLASTING
Pseudognaphalium beneolensNative
Pseudognaphalium biolettiiNative
Pseudognaphalium californicumNative
Pseudognaphalium canescensNative
Pseudognaphalium canescens subsp. beneolens
(Under Pseudognaphalium beneolens)
Synonym
Pseudognaphalium leucocephalumWHITE RABBIT-TOBACCONative
Pseudognaphalium luteoalbumNaturalized
Pseudognaphalium macouniiMACOUN'S EVERLASTINGNative
Pseudognaphalium microcephalumNative
Pseudognaphalium microcephalum var. thermale
(Under Pseudognaphalium thermale)
Synonym
Pseudognaphalium ramosissimumNative
Pseudognaphalium roseumNative
Pseudognaphalium stramineumNative
Pseudognaphalium thermaleNative
Pseudoroegneria spicata
(Under Elymus spicatus)
Synonym
Pseudoroegneria spicata subsp. spicata
(Under Elymus spicatus)
Synonym
Pseudorontium
Pseudorontium cyathiferumDEEP CANYON SNAPDRAGONNative
Pseudostellaria jamesiana
(Under Torreyostellaria jamesiana)
Synonym
Pseudostellaria sierrae
(Under Hartmaniella sierrae)
Synonym
Pseudotrillium
Pseudotrillium rivaleBROOK WAKEROBINNative
Pseudotsuga
  ↳  Key to Pseudotsuga
Pseudotsuga macrocarpaBIGCONE DOUGLAS-FIR, BIGCONE SPRUCENative
Pseudotsuga menziesii var. menziesiiDOUGLAS-FIRNative
Psilocarphus
  ↳  Key to Psilocarphus
WOOLLY-MARBLES, WOOLLYHEADS
Psilocarphus brevissimusNative
Psilocarphus brevissimus var. brevissimusDWARF WOOLLYHEADSNative
Psilocarphus brevissimus var. multiflorusDELTA WOOLLY-MARBLESNative
Psilocarphus chilensisROUND WOOLLY-MARBLESNative
Psilocarphus elatiorTALL WOOLLY-MARBLESNative
Psilocarphus globiferus
(Under Psilocarphus brevissimus var. brevissimus)
Synonym
Psilocarphus globiferus
(Under Psilocarphus chilensis)
Synonym
Psilocarphus globiferus
(Under Psilocarphus chilensis)
Synonym, in part
Psilocarphus oregonusOREGON WOOLLYHEADSNative
Psilocarphus tenellusSLENDER WOOLLY-MARBLESNative
Psilocarphus tenellus var. globiferus
(Under Psilocarphus chilensis)
Synonym
Psilocarphus tenellus var. tenellus
(Under Psilocarphus tenellus)
Synonym
Psilocarphus tenellus var. tenuis
(Under Psilocarphus chilensis)
Synonym
PsilostrophePAPER-DAISY
Psilostrophe cooperiNative
Psoralea bituminosa
(Under Bituminaria bituminosa)
Synonym
Psoralea californica
(Under Pediomelum californicum)
Synonym
Psoralea castorea
(Under Pediomelum castoreum)
Synonym
Psoralea hallii var. media
(Under Hoita macrostachya)
Synonym
Psoralea lanceolata
(Under Ladeania lanceolata)
Synonym
Psoralea lanceolata subsp. scabra
(Under Ladeania lanceolata)
Synonym
Psoralea orbicularis
(Under Hoita orbicularis)
Synonym
Psoralea physodes
(Under Rupertia physodes)
Synonym
Psoralea rigida
(Under Rupertia rigida)
Synonym
Psoralea strobilina
(Under Hoita strobilina)
Synonym
Psoralidium lanceolatum
(Under Ladeania lanceolata)
Synonym
Psorodendron arborescens
(Under Psorothamnus arborescens var. arborescens)
Synonym
Psorodendron fremontii
(Under Psorothamnus fremontii var. fremontii)
Synonym
Psorodendron schottii
(Under Psorothamnus schottii)
Synonym
Psorothamnus
  ↳  Key to Psorothamnus
INDIGO-BUSH
Psorothamnus arborescensMOJAVE INDIGO-BUSHNative
Psorothamnus arborescens var. arborescensNative
Psorothamnus arborescens var. minutifoliusNative
Psorothamnus arborescens var. simplicifoliusNative
Psorothamnus emoryiNative
Psorothamnus fremontiiFREMONT'S DALEANative
Psorothamnus fremontii var. attenuatusNARROW-LEAVED PSOROTHAMNUSNative
Psorothamnus fremontii var. fremontiiNative
Psorothamnus polydeniusNative
Psorothamnus schottiiINDIGO-BUSHNative
Psorothamnus spinosusSMOKE TREENative
PteleaHOP TREE
Ptelea crenulataNative
Pteridaceae
  ↳  Key to Pteridaceae
BRAKE FAMILY
PteridiumBRACKEN, BRAKE
Pteridium aquilinum var. pubescensNative
Pteris
  ↳  Key to Pteris
BRAKE
Pteris creticaCRETAN BRAKENaturalized
Pteris tremulaWaif
Pteris vittataLADDER BRAKENaturalized
PterocaryaWINGNUT
Pterocarya stenopteraCHINESE WINGNUTWaif
PterosporaPINEDROPS
Pterospora andromedeaNative
PterostegiaWOODLAND THREADSTEM
Pterostegia diphylla
(Under Pterostegia drymarioides)
Synonym
Pterostegia diphylla var. biloba
(Under Pterostegia drymarioides)
Synonym
Pterostegia drymarioidesNative
Pterostegia microphylla
(Under Pterostegia drymarioides)
Synonym
Pteryxia petraea
(Under Cymopterus terebinthinus var. petraeus)
Synonym
Pteryxia terebinthina var. californica
(Under Cymopterus terebinthinus var. californicus)
Synonym
Ptilagrostis kingii
(Under Stipa kingii)
Synonym
Puccinellia
  ↳  Key to Puccinellia
ALKALI GRASS
Puccinellia airoides
(Under Puccinellia nuttalliana)
Synonym
Puccinellia californica
(Under Torreyochloa pallida var. pauciflora)
Synonym
Puccinellia distansEUROPEAN ALKALI GRASSNaturalized
Puccinellia erecta
(Under Torreyochloa erecta)
Synonym
Puccinellia grandis
(Under Puccinellia nutkaensis)
Synonym
Puccinellia howelliiHOWELL'S ALKALI GRASSNative
Puccinellia lemmoniiLEMMON'S ALKALI GRASSNative
Puccinellia nutkaensisALASKA ALKALI GRASSNative
Puccinellia nuttallianaNUTTALL'S ALKALI GRASSNative
Puccinellia parishiiPARISH'S ALKALI GRASSNative
Puccinellia pauciflora
(Under Torreyochloa pallida var. pauciflora)
Synonym
Puccinellia pumilaDWARF ALKALI GRASSNative
Puccinellia simplexNative
Pugiopappus bigelovii
(Under Leptosyne bigelovii)
Synonym
PulicariaFALSE-FLEABANE
Pulicaria hispanica
(Under Pulicaria paludosa)
Synonym
Pulicaria paludosaNaturalized
PunicaPOMEGRANATE
Punica granatumNaturalized
Purpusia saxosa
(Under Ivesia arizonica var. arizonica)
Synonym
Purshia
  ↳  Key to Purshia
Purshia glandulosa
(Under Purshia tridentata var. glandulosa)
Synonym
Purshia mexicana var. stansburyana
(Under Purshia stansburyana)
Synonym
Purshia stansburyanaCLIFFROSENative
Purshia tridentataBITTERBRUSHNative
Purshia tridentata var. glandulosaNative
Purshia tridentata var. tridentataNative
Pycnanthemum
Pycnanthemum californicumNative
Pyracantha
  ↳  Key to Pyracantha
Pyracantha angustifoliaSLENDER or WOOLLY FIRETHORNNaturalized
Pyracantha atalantioidesSICHUAN FIRETHORNWaif
Pyracantha coccineaFIRETHORN or SCARLET FIRETHORNWaif
Pyracantha crenatoserrata
(Under Pyracantha fortuneana)
Synonym
Pyracantha crenulataHIMALAYAN or NEPAL FIRETHORNWaif
Pyracantha fortuneanaCHINESE FIRETHORNNaturalized
Pyracantha koidzumiiTAIWAN FIRETHORNNaturalized
Pyracantha rogersiana
(Under Pyracantha fortuneana)
Synonym
Pyrola
  ↳  Key to Pyrola
WINTERGREEN
Pyrola aphyllaLEAFLESS WINTERGREENNative
Pyrola asarifoliaNative
Pyrola asarifolia subsp. asarifoliaBOG WINTERGREENNative
Pyrola asarifolia subsp. bracteataLONG-BRACTED WINTERGREENNative
Pyrola asarifolia var. purpurea
(Under Pyrola asarifolia subsp. asarifolia)
Synonym
Pyrola bracteata
(Under Pyrola asarifolia subsp. bracteata)
Synonym
Pyrola californica
(Under Pyrola asarifolia subsp. asarifolia)
Synonym
Pyrola cryptaCRYPTIC WINTERGREENNative
Pyrola dentataTOOTHED WINTERGREENNative
Pyrola minorLESSER WINTERGREENNative
Pyrola pallida
(Under Pyrola dentata)
Synonym
Pyrola pictaWHITE-VEINED WINTERGREENNative
Pyrola picta f. aphylla
(Under Pyrola aphylla)
Synonym
Pyrola picta subsp. dentata
(Under Pyrola dentata)
Synonym
Pyrola picta subsp. integra
(Under Pyrola dentata)
Synonym
Pyrola picta subsp. pallida
(Under Pyrola dentata)
Synonym
Pyrola picta var. dentata
(Under Pyrola dentata)
Synonym
Pyrola secunda
(Under Orthilia secunda)
Synonym
Pyrrocoma
  ↳  Key to Pyrrocoma
Pyrrocoma apargioidesALPINE FLAMESNative
Pyrrocoma carthamoides var. cusickiiLARGE-FLOWERED GOLDENWEEDNative
Pyrrocoma hirtaTACKY GOLDENWEEDNative
Pyrrocoma hirta var. hirtaNative
Pyrrocoma hirta var. lanulosaNative
Pyrrocoma lanceolataLANCE-LEAVED GOLDENWEEDNative
Pyrrocoma lanceolata var. lanceolataNative
Pyrrocoma lanceolata var. subviscosaNative
Pyrrocoma lanulosa
(Under Pyrrocoma hirta var. lanulosa)
Synonym
Pyrrocoma lucidaSTICKY PYRROCOMANative
Pyrrocoma racemosaCLUSTERED GOLDENWEEDNative
Pyrrocoma racemosa var. congestaDEL NORTE PYRROCOMANative
Pyrrocoma racemosa var. paniculataNative
Pyrrocoma racemosa var. pinetorumPINE PYRROCOMANative
Pyrrocoma racemosa var. racemosaNative
Pyrrocoma racemosa var. sessilifloraNative
Pyrrocoma unifloraPLANTAIN GOLDENWEEDNative
Pyrrocoma uniflora var. gossypinaBEAR VALLEY PYRROCOMANative
Pyrrocoma uniflora var. unifloraNative
PyrusPEAR
Pyrus communisCOMMON PEARNaturalized
Pyrus malus
(Under Malus pumila)
Synonym
Quamoclidion froebelii
(Under Mirabilis multiflora var. pubescens)
Synonym
Quamoclidion greenei
(Under Mirabilis greenei)
Synonym
Quercus
  ↳  Key to Quercus
OAK
Quercus ×acutidensNative
Quercus ×alvordianaNative
Quercus ×macdonaldiiMACDONALD OAKNative
Quercus agrifoliaCOAST LIVE OAK, ENCINANative
Quercus agrifolia var. agrifoliaNative
Quercus agrifolia var. frutescens
(Under Quercus agrifolia var. agrifolia)
Synonym
Quercus agrifolia var. oxyadeniaNative
Quercus berberidifoliaSCRUB OAKNative
Quercus breweri
(Under Quercus garryana var. breweri)
Synonym
Quercus cedrosensisCEDROS ISLAND OAKNative
Quercus celata
(Under Quercus parvula var. shrevei)
Synonym ined.
Quercus chrysolepisMAUL OAK, CANYON LIVE OAKNative
Quercus chrysolepis var. nana
(Under Quercus chrysolepis)
Synonym
Quercus cornelius-mulleriMULLER'S OAKNative
Quercus douglasiiBLUE OAKNative
Quercus dumosaNUTTALL'S SCRUB OAKNative
Quercus dunnii
(Under Quercus palmeri)
Illegitimate name
Quercus durataLEATHER OAKNative
Quercus durata var. durataNative
Quercus durata var. gabrielensisSAN GABRIEL OAKNative
Quercus engelmanniiENGELMANN OAKNative
Quercus garryanaOREGON OAKNative
Quercus garryana var. breweriNative
Quercus garryana var. garryanaNative
Quercus garryana var. semotaNative
Quercus ilexHOLLY OAKNaturalized
Quercus john-tuckeriTUCKER'S OAKNative
Quercus kelloggiiCALIFORNIA BLACK OAKNative
Quercus lobataVALLEY OAK, ROBLENative
Quercus lobata f. insperata
(Under Quercus lobata)
Synonym
Quercus lobata f. rarita
(Under Quercus lobata)
Synonym
Quercus lobata var. lobata
(Under Quercus lobata)
Synonym
Quercus lobata var. turbinata
(Under Quercus lobata)
Synonym
Quercus lobata var. walteri
(Under Quercus lobata)
Synonym
Quercus pacificaISLAND SCRUB OAKNative
Quercus palmeriPALMER'S OAKNative
Quercus parvulaNative
Quercus parvula var. parvulaSANTA CRUZ ISLAND OAKNative
Quercus parvula var. shreveiSHREVE OAKNative
Quercus parvula var. tamalpaisensisTAMALPAIS OAKNative
Quercus pedunculata
(Under Quercus robur)
Synonym
Quercus roburENGLISH OAK, PEDUNCULATE OAKWaif
Quercus sadlerianaDEER OAKNative
Quercus tomentellaISLAND OAKNative
Quercus turbinellaSHRUB LIVE OAKNative
Quercus turbinella subsp. californica
(Under Quercus john-tuckeri)
Synonym
Quercus vacciniifoliaHUCKLEBERRY OAKNative
Quercus wislizeniINTERIOR LIVE OAKNative
Quercus wislizeni var. frutescensNative
Quercus wislizeni var. wislizeniNative
Rafinesquia
  ↳  Key to Rafinesquia
Rafinesquia californicaCALIFORNIA CHICORYNative
Rafinesquia neomexicanaDESERT CHICORYNative
Raillardella
  ↳  Key to Raillardella
Raillardella argenteaSILKY RAILLARDELLANative
Raillardella pringleiSHOWY RAILLARDELLANative
Raillardella scaposaNative
Raillardiopsis muirii
(Under Carlquistia muirii)
Synonym
Raillardiopsis scabrida
(Under Anisocarpus scabridus)
Synonym
Ranunculaceae
  ↳  Key to Ranunculaceae
BUTTERCUP FAMILY
Ranunculus
  ↳  Key to Ranunculus
BUTTERCUP
Ranunculus acrisWaif
Ranunculus alceus
(Under Ranunculus occidentalis var. ultramontanus)
Synonym
Ranunculus alismifoliusNative
Ranunculus alismifolius var. alismellusNative
Ranunculus alismifolius var. alismifoliusNative
Ranunculus alismifolius var. hartwegiiNative
Ranunculus alismifolius var. lemmoniiNative
Ranunculus alveolatus
(Under Ranunculus bonariensis var. trisepalus)
Synonym
Ranunculus andersoniiNative
Ranunculus aquatilisNative
Ranunculus aquatilis var. aquatilisNative
Ranunculus aquatilis var. capillaceus
(Under Ranunculus aquatilis var. diffusus)
Synonym
Ranunculus aquatilis var. diffususNative
Ranunculus aquatilis var. harrisii
(Under Ranunculus aquatilis var. diffusus)
Synonym
Ranunculus aquatilis var. hispidulus
(Under Ranunculus aquatilis var. aquatilis)
Synonym
Ranunculus aquatilis var. longirostris
(Under Ranunculus aquatilis var. diffusus)
Synonym
Ranunculus aquatilis var. subrigidus
(Under Ranunculus aquatilis var. diffusus)
Synonym
Ranunculus aquatilus
(Under Ranunculus aquatilis)
Orthographic variant
Ranunculus arvensisNaturalized
Ranunculus bonariensis var. trisepalusNative
Ranunculus bongardii
(Under Ranunculus uncinatus)
Synonym
Ranunculus bulbosusWaif
Ranunculus californicusNative
Ranunculus californicus var. austromontanus
(Under Ranunculus californicus var. californicus)
Synonym
Ranunculus californicus var. californicusNative
Ranunculus californicus var. cuneatusNative
Ranunculus californicus var. gratus
(Under Ranunculus californicus var. californicus)
Synonym
Ranunculus californicus var. rugulosus
(Under Ranunculus californicus var. californicus)
Synonym
Ranunculus canusNative
Ranunculus canus var. canusNative
Ranunculus canus var. ludovicianusNative
Ranunculus circinatus var. subrigidus
(Under Ranunculus aquatilis var. diffusus)
Synonym
Ranunculus cymbalariaNative
Ranunculus cymbalaria var. saximontanus
(Under Ranunculus cymbalaria)
Synonym
Ranunculus delphinifolius
(Under Ranunculus flabellaris)
Synonym
Ranunculus eschscholtziiNative
Ranunculus eschscholtzii var. eschscholtziiNative
Ranunculus eschscholtzii var. oxynotusNative
Ranunculus eschscholtzii var. suksdorfiiNative
Ranunculus flabellarisNative
Ranunculus flammulaNative
Ranunculus flammula var. flammulaNative
Ranunculus flammula var. ovalisNative
Ranunculus flammula var. samolifolius
(Under Ranunculus flammula var. ovalis)
Synonym
Ranunculus glaberrimusNative
Ranunculus glaberrimus var. ellipticusNative
Ranunculus glaberrimus var. glaberrimusNative
Ranunculus gormaniiNative
Ranunculus hebecarpusNative
Ranunculus hydrocharoidesFROG'S-BIT BUTTERCUPNative
Ranunculus hystriculusNative
Ranunculus lemmonii
(Under Ranunculus alismifolius var. lemmonii)
Synonym
Ranunculus lobbiiLOBB'S AQUATIC BUTTERCUPNative
Ranunculus longirostris
(Under Ranunculus aquatilis var. diffusus)
Synonym
Ranunculus macouniiMACOUN'S BUTTERCUPNative
Ranunculus minimus
(Under Myosurus minimus)
Synonym
Ranunculus muricatusNaturalized
Ranunculus occidentalisNative
Ranunculus occidentalis var. alceus
(Under Ranunculus occidentalis var. ultramontanus)
Synonym
Ranunculus occidentalis var. dissectusNative
Ranunculus occidentalis var. eisenii
(Under Ranunculus occidentalis var. occidentalis)
Synonym
Ranunculus occidentalis var. howelliiNative
Ranunculus occidentalis var. occidentalisNative
Ranunculus occidentalis var. rattanii
(Under Ranunculus occidentalis var. occidentalis)
Synonym
Ranunculus occidentalis var. ultramontanusNative
Ranunculus orthorhynchusNative
Ranunculus orthorhynchus subsp. platyphyllus
(Under Ranunculus orthorhynchus var. platyphyllus)
Synonym
Ranunculus orthorhynchus var. bloomeriNative
Ranunculus orthorhynchus var. hallii
(Under Ranunculus orthorhynchus var. orthorhynchus)
Synonym
Ranunculus orthorhynchus var. orthorhynchusNative
Ranunculus orthorhynchus var. platyphyllusNative
Ranunculus parviflorusNaturalized
Ranunculus populagoNative
Ranunculus pusillusNative
Ranunculus repensNaturalized
Ranunculus sardousNaturalized
Ranunculus sceleratusNative
Ranunculus sceleratus var. multifidusNative
Ranunculus sceleratus var. sceleratusNaturalized
Ranunculus subrigidus
(Under Ranunculus aquatilis var. diffusus)
Synonym
Ranunculus testiculatusNaturalized
Ranunculus trichophyllus
(Under Ranunculus aquatilis var. diffusus)
Synonym
Ranunculus trichophyllus var. trichophyllus
(Under Ranunculus aquatilis var. diffusus)
Synonym
Ranunculus trilobusExtirpated waif
Ranunculus uncinatusNative
Ranunculus uncinatus var. parviflorus
(Under Ranunculus uncinatus)
Synonym
Raphanus
  ↳  Key to Raphanus
Raphanus raphanistrumJOINTED CHARLOCKNaturalized
Raphanus sativusRADISHNaturalized
RapistrumWILD TURNIP
Rapistrum rugosumNaturalized
RatibidaPRAIRIE CONE-FLOWER
Ratibida columnaris var. pulcherrima
(Under Ratibida columnifera)
Synonym
Ratibida columniferaNaturalized
Reseda
  ↳  Key to Reseda
MIGNONETTE
Reseda albaWHITE MIGNONETTENaturalized
Reseda luteaYELLOW MIGNONETTENaturalized
Reseda luteolaDYER'S ROCKETNaturalized
Reseda odorataGARDEN MIGNONETTEWaif
Resedaceae
  ↳  Key to Resedaceae
MIGNONETTE FAMILY
Retama monosperma
(Under Genista monosperma)
Synonym
Reynoutria baldschuanica
(Under Fallopia baldschuanica)
Synonym
Reynoutria convolvulus
(Under Fallopia convolvulus)
Synonym
Reynoutria japonica
(Under Fallopia japonica)
Synonym
Reynoutria sachalinensis
(Under Fallopia sachalinensis)
Synonym
Rhagadiolus
Rhagadiolus stellatusNaturalized
Rhamnaceae
  ↳  Key to Rhamnaceae
BUCKTHORN FAMILY
Rhamnus
  ↳  Key to Rhamnus
BUCKTHORN
Rhamnus alaternusITALIAN BUCKHORNWaif
Rhamnus alnifoliaALDER BUCKTHORNNative
Rhamnus annonifolia
(Under Frangula purshiana subsp. annonifolia)
Synonym
Rhamnus californica
(Under Frangula californica)
Synonym
Rhamnus californica subsp. californica
(Under Frangula californica subsp. californica)
Synonym
Rhamnus californica subsp. crassifolia
(Under Frangula californica subsp. crassifolia)
Synonym
Rhamnus californica subsp. cuspidata
(Under Frangula californica subsp. cuspidata)
Synonym
Rhamnus californica subsp. occidentalis
(Under Frangula californica subsp. occidentalis)
Synonym
Rhamnus californica subsp. tomentella
(Under Frangula californica subsp. tomentella)
Synonym
Rhamnus californica subsp. ursina
(Under Frangula californica subsp. ursina)
Synonym
Rhamnus californica var. crassifolia
(Under Frangula californica subsp. crassifolia)
Synonym
Rhamnus californica var. obtusissima
(Under Frangula californica subsp. californica)
Unabridged misapplied name, in part
Rhamnus californica var. obtusissima
(Under Frangula rubra)
Unabridged misapplied name, in part
Rhamnus californica var. obtusissima
(Under Frangula rubra subsp. obtusissima)
Misapplied name, in part
Rhamnus californica var. occidentalis
(Under Frangula californica subsp. occidentalis)
Synonym
Rhamnus californica var. rubra
(Under Frangula rubra)
Synonym
Rhamnus californica var. tomentella
(Under Frangula californica subsp. tomentella)
Synonym
Rhamnus californica var. ursina
(Under Frangula californica subsp. ursina)
Synonym
Rhamnus californica var. viridula
(Under Frangula californica subsp. cuspidata)
Synonym
Rhamnus catalinae
(Under Rhamnus pirifolia)
Synonym
Rhamnus croceaSPINY REDBERRYNative
Rhamnus crocea subsp. ilicifolia
(Under Rhamnus ilicifolia)
Synonym
Rhamnus crocea subsp. pilosa
(Under Rhamnus pilosa)
Synonym
Rhamnus crocea subsp. pirifolia
(Under Rhamnus pirifolia)
Synonym
Rhamnus crocea var. ilicifolia
(Under Rhamnus ilicifolia)
Synonym
Rhamnus crocea var. insularis
(Under Rhamnus pirifolia)
Synonym
Rhamnus crocea var. pilosa
(Under Rhamnus pilosa)
Synonym
Rhamnus crocea var. pirifolia
(Under Rhamnus pirifolia)
Synonym
Rhamnus cuspidata
(Under Frangula californica subsp. cuspidata)
Synonym
Rhamnus ilicifoliaHOLLYLEAF REDBERRYNative
Rhamnus obtusissima
(Under Frangula rubra subsp. obtusissima)
Synonym
Rhamnus occidentalis
(Under Frangula californica subsp. occidentalis)
Synonym
Rhamnus pilosaNative
Rhamnus pirifoliaISLAND REDBERRYNative
Rhamnus purshiana
(Under Frangula purshiana)
Synonym
Rhamnus purshiana subsp. purshiana
(Under Frangula purshiana subsp. purshiana)
Synonym
Rhamnus purshiana var. annonifolia
(Under Frangula purshiana subsp. annonifolia)
Synonym
Rhamnus purshiana var. purshiana
(Under Frangula purshiana subsp. purshiana)
Synonym
Rhamnus rubra
(Under Frangula rubra)
Synonym
Rhamnus rubra subsp. modocensis
(Under Frangula rubra subsp. modocensis)
Synonym
Rhamnus rubra subsp. obtusissima
(Under Frangula rubra subsp. obtusissima)
Synonym
Rhamnus rubra subsp. rubra
(Under Frangula rubra subsp. rubra)
Synonym
Rhamnus rubra subsp. yosemitana
(Under Frangula rubra subsp. yosemitana)
Synonym
Rhamnus rubra var. modocensis
(Under Frangula rubra subsp. modocensis)
Synonym
Rhamnus rubra var. obtusissima
(Under Frangula rubra subsp. obtusissima)
Synonym
Rhamnus rubra var. yosemitana
(Under Frangula rubra subsp. yosemitana)
Synonym
Rhamnus tomentella
(Under Frangula californica subsp. tomentella)
Synonym
Rhamnus tomentella subsp. crassifolia
(Under Frangula californica subsp. crassifolia)
Synonym
Rhamnus tomentella subsp. cuspidata
(Under Frangula californica subsp. cuspidata)
Synonym
Rhamnus tomentella subsp. tomentella
(Under Frangula californica subsp. tomentella)
Synonym
Rhamnus tomentella subsp. ursina
(Under Frangula californica subsp. ursina)
Synonym
Rhamnus tomentella var. ursina
(Under Frangula californica subsp. ursina)
Synonym ined.
Rhamnus ursina
(Under Frangula californica subsp. ursina)
Synonym
Rhaponticum
Rhaponticum repensRUSSIAN KNAPWEEDNaturalized
Rhinotropis
  ↳  Key to Rhinotropis
MILKWORT
Rhinotropis acanthocladaTHORNY MILKWORTNative
Rhinotropis californicaCALIFORNIA MILKWORTNative
Rhinotropis cornutaNative
Rhinotropis cornuta var. cornutaSIERRA MILKWORTNative
Rhinotropis cornuta var. fishiaeFISH'S MILKWORTNative
Rhinotropis heterorhynchaNOTCH-BEAKED MILKWORTNative
Rhinotropis intermontanaINTERMOUNTAIN MILKWORTNative
Rhinotropis subspinosaSPINY MILKWORTNative
Rhodiola
Rhodiola integrifolia subsp. integrifoliaWESTERN ROSEROOTNative
Rhododendron
  ↳  Key to Rhododendron
Rhododendron columbianumWESTERN LABRADOR TEANative
Rhododendron macrophyllumCALIFORNIA RHODODENDRONNative
Rhododendron occidentaleCALIFORNIA AZALEANative
Rhus
  ↳  Key to Rhus
Rhus aromaticaSKUNK BUSHNative
Rhus aromatica subsp. trilobata
(Under Rhus aromatica)
Synonym
Rhus aromatica var. simplicifolia
(Under Rhus aromatica)
Synonym
Rhus aromatica var. trilobata
(Under Rhus aromatica)
Synonym
Rhus diversiloba
(Under Toxicodendron diversilobum)
Synonym
Rhus integrifoliaLEMONADE BERRYNative
Rhus lancea
(Under Searsia lancea)
Synonym
Rhus laurina
(Under Malosma laurina)
Synonym
Rhus ovataSUGAR BUSH, SUGAR SUMACNative
Rhus trilobata
(Under Rhus aromatica)
Synonym
Rhus trilobata var. anisophylla
(Under Rhus aromatica)
Synonym
Rhus trilobata var. malacophylla
(Under Rhus aromatica)
Synonym
Rhus trilobata var. quinata
(Under Rhus aromatica)
Synonym
Rhus trilobata var. simplicifolia
(Under Rhus aromatica)
Synonym
Rhus trilobata var. trilobata
(Under Rhus aromatica)
Synonym
Rhynchelytrum repens
(Under Melinis repens subsp. repens)
Synonym
Rhynchelytrum roseum
(Under Melinis repens subsp. repens)
Synonym
Rhynchospora
  ↳  Key to Rhynchospora
BEAKED-RUSH
Rhynchospora albaWHITE BEAKED-RUSHNative
Rhynchospora californicaCALIFORNIA BEAKED-RUSHNative
Rhynchospora capitellataBROWNISH BEAKED-RUSHNative
Rhynchospora globularisNative
Rhynchospora globularis var. recognita
(Under Rhynchospora globularis)
Synonym
Rhynchospora glomerata var. capitellata
(Under Rhynchospora capitellata)
Synonym
Rhynchospora glomerata var. minor
(Under Rhynchospora capitellata)
Synonym
Rhynchospora recognita
(Under Rhynchospora globularis)
Synonym
Rhytidea bicolor
(Under Dichelostemma ida-maia)
Synonym
Ribes
  ↳  Key to Ribes
CURRANT, GOOSEBERRY
Ribes amarumBITTER GOOSEBERRYNative
Ribes amarum var. hoffmannii
(Under Ribes amarum)
Synonym
Ribes aureumGOLDEN CURRANTNative
Ribes aureum var. aureumNative
Ribes aureum var. gracillimumNative
Ribes binominatumTRAILING GOOSEBERRYNative
Ribes bracteosumSTINK CURRANTNative
Ribes californicumHILLSIDE GOOSEBERRYNative
Ribes californicum var. californicumNative
Ribes californicum var. hesperiumNative
Ribes canthariformeMORENO CURRANTNative
Ribes cereumWAX CURRANTNative
Ribes cereum var. cereumNative
Ribes cereum var. inebriansNative
Ribes cruentum
(Under Ribes roezlii var. cruentum)
Synonym
Ribes divaricatumNative
Ribes divaricatum var. inerme
(Under Ribes inerme var. inerme)
Synonym
Ribes divaricatum var. klamathense
(Under Ribes inerme var. klamathense)
Synonym
Ribes divaricatum var. parishiiPARISH'S GOOSEBERRYNative
Ribes divaricatum var. pubiflorumSTRAGGLE BUSHNative
Ribes glanduliferum
(Under Ribes velutinum)
Synonym
Ribes glutinosum
(Under Ribes sanguineum var. glutinosum)
Synonym
Ribes hallii
(Under Ribes viscosissimum)
Synonym
Ribes hudsonianum var. petiolareWESTERN BLACK CURRANTNative
Ribes indecorumWHITE-FLOWERING CURRANTNative
Ribes inebrians
(Under Ribes cereum var. inebrians)
Synonym
Ribes inermeWHITE-STEMMED GOOSEBERRYNative
Ribes inerme var. inermeNative
Ribes inerme var. klamathenseNative
Ribes lacustreSWAMP CURRANTNative
Ribes lasianthumWOOLLY-FLOWERED GOOSEBERRYNative
Ribes laxiflorumTRAILING BLACK CURRANTNative
Ribes leptanthum var. lasianthum
(Under Ribes lasianthum)
Synonym
Ribes leptanthum var. quercetorum
(Under Ribes quercetorum)
Synonym
Ribes lobbiiGUMMY GOOSEBERRYNative
Ribes malvaceumCHAPARRAL CURRANTNative
Ribes malvaceum var. clementinum
(Under Ribes malvaceum var. malvaceum)
Synonym
Ribes malvaceum var. malvaceumNative
Ribes malvaceum var. viridifoliumNative
Ribes marshalliiMARSHALL'S GOOSEBERRYNative
Ribes menziesiiCANYON GOOSEBERRYNative
Ribes menziesii var. faustum
(Under Ribes menziesii var. menziesii)
Synonym
Ribes menziesii var. hystriculum
(Under Ribes menziesii var. menziesii)
Synonym
Ribes menziesii var. hystrix
(Under Ribes menziesii var. menziesii)
Synonym
Ribes menziesii var. ixodermeAROMATIC CANYON GOOSEBERRYNative
Ribes menziesii var. leptosmum
(Under Ribes menziesii var. menziesii)
Synonym
Ribes menziesii var. menziesiiNative
Ribes menziesii var. minus
(Under Ribes victoris)
Synonym
Ribes menziesii var. retineatum
(Under Ribes menziesii var. menziesii)
Synonym
Ribes menziesii var. senile
(Under Ribes menziesii var. menziesii)
Synonym
Ribes menziesii var. thacherianum
(Under Ribes thacherianum)
Synonym
Ribes montigenumWESTERN PRICKLY GOOSEBERRYNative
Ribes nevadenseMOUNTAIN PINK CURRANTNative
Ribes nevadense var. glaucescens
(Under Ribes nevadense)
Synonym
Ribes nevadense var. jaegeri
(Under Ribes nevadense)
Synonym
Ribes petiolare
(Under Ribes hudsonianum var. petiolare)
Synonym
Ribes quercetorumOAKWOODS GOOSEBERRYNative
Ribes roezliiSIERRAN GOOSEBERRYNative
Ribes roezlii var. amictumHOARY GOOSEBERRYNative
Ribes roezlii var. cruentumNative
Ribes roezlii var. roezliiNative
Ribes sanguineumRED-FLOWERING CURRANTNative
Ribes sanguineum var. deductum
(Under Ribes sanguineum var. glutinosum)
Synonym
Ribes sanguineum var. glutinosumNative
Ribes sanguineum var. melanocarpum
(Under Ribes sanguineum var. glutinosum)
Synonym
Ribes sanguineum var. sanguineumNative
Ribes sericeumSANTA LUCIA GOOSEBERRYNative
Ribes speciosumFUCHSIA-FLOWERED GOOSEBERRYNative
Ribes thacherianumSANTA CRUZ ISLAND GOOSEBERRYNative
Ribes tularenseSEQUOIA GOOSEBERRYNative
Ribes velutinumNative
Ribes velutinum var. glanduliferum
(Under Ribes velutinum)
Synonym
Ribes velutinum var. gooddingii
(Under Ribes velutinum)
Synonym
Ribes viburnifoliumSANTA CATALINA ISLAND CURRANTNative
Ribes victorisVICTOR'S GOOSEBERRYNative
Ribes victoris var. minus
(Under Ribes victoris)
Synonym
Ribes viscosissimumSTICKY CURRANTNative
Ribes viscosissimum var. hallii
(Under Ribes viscosissimum)
Synonym
RicinusCASTOR BEAN
Ricinus communisNaturalized
Rigiopappus
Rigiopappus leptocladusNative
Robinia
  ↳  Key to Robinia
LOCUST
Robinia neomexicanaNEW MEXICO LOCUSTNative
Robinia pseudoacaciaBLACK LOCUSTNaturalized
Romanzoffia
  ↳  Key to Romanzoffia
Romanzoffia californicaCALIFORNIA MISTMAIDENNative
Romanzoffia glauca
(Under Romanzoffia sitchensis)
Synonym
Romanzoffia leibergii
(Under Romanzoffia sitchensis)
Synonym
Romanzoffia macounii
(Under Romanzoffia sitchensis)
Synonym
Romanzoffia mendocina
(Under Romanzoffia californica)
Synonym
Romanzoffia minima
(Under Romanzoffia sitchensis)
Synonym
Romanzoffia rubella
(Under Romanzoffia sitchensis)
Synonym
Romanzoffia sitchensisSITKA MISTMAIDNative
Romanzoffia spergulina
(Under Romanzoffia californica)
Synonym
Romanzoffia suksdorfii
(Under Romanzoffia sitchensis)
Synonym
Romanzoffia tracyiTRACY'S MISTMAIDENNative
Romneya
  ↳  Key to Romneya
MATILIJA POPPY
Romneya coulteriCOULTER'S MATILIJA POPPYNative
Romneya trichocalyxHAIRY MATILIJA POPPYNative
Romulea
Romulea longifolia
(Under Romulea rosea var. australis)
Synonym
Romulea rosea var. australisNaturalized
Rorippa
  ↳  Key to Rorippa
YELLOW CRESS
Rorippa austriacaAUSTRIAN FIELD-CRESSNaturalized
Rorippa calycina var. columbiae
(Under Rorippa columbiae)
Synonym
Rorippa columbiaeCOLUMBIA YELLOW CRESSNative
Rorippa curvipesNative
Rorippa curvipes var. curvipes
(Under Rorippa curvipes)
Synonym
Rorippa curvipes var. truncata
(Under Rorippa curvipes)
Synonym
Rorippa curvisiliquaNative
Rorippa curvisiliqua var. curvisiliqua
(Under Rorippa curvisiliqua)
Synonym
Rorippa curvisiliqua var. occidentalis
(Under Rorippa curvisiliqua)
Synonym
Rorippa curvisiliqua var. orientalis
(Under Rorippa curvisiliqua)
Synonym
Rorippa curvisiliqua var. procumbens
(Under Rorippa curvisiliqua)
Synonym
Rorippa gambelii
(Under Nasturtium gambelii)
Synonym
Rorippa nasturtium-aquaticum
(Under Nasturtium officinale)
Synonym
Rorippa palustrisNative
Rorippa palustris subsp. fernaldiana
(Under Rorippa palustris subsp. palustris)
Synonym
Rorippa palustris subsp. hispidaNative
Rorippa palustris subsp. occidentalis
(Under Rorippa palustris subsp. palustris)
Synonym
Rorippa palustris subsp. palustrisNative
Rorippa palustris var. fernaldiana
(Under Rorippa palustris subsp. palustris)
Synonym
Rorippa palustris var. hispida
(Under Rorippa palustris subsp. hispida)
Synonym
Rorippa palustris var. occidentalis
(Under Rorippa palustris subsp. palustris)
Synonym
Rorippa sinuataNative
Rorippa sphaerocarpaNative
Rorippa subumbellataTAHOE YELLOW CRESSNative
Rorippa tenerrimaNative
Rosa
  ↳  Key to Rosa
Rosa bridgesiiSIERRAN DWARF ROSENative
Rosa californicaCALIFORNIA ROSENative
Rosa caninaDOG ROSENaturalized
Rosa crenulata
(Under Rosa bridgesii)
Synonym
Rosa eglanteria
(Under Rosa rubiginosa)
Synonym
Rosa gymnocarpaWOOD ROSENative
Rosa gymnocarpa var. gymnocarpaNative
Rosa gymnocarpa var. pubescens
(Under Rosa bridgesii)
Synonym
Rosa gymnocarpa var. serpentinaGASQUET ROSENative
Rosa minutifoliaSMALL-LEAVED ROSENative
Rosa mohavensis
(Under Rosa woodsii var. glabrata)
Synonym
Rosa multifloraMULTIFLORA ROSANaturalized
Rosa nutkanaNative
Rosa nutkana subsp. macdougaliiNative
Rosa nutkana subsp. nutkanaNOOTKA ROSENative
Rosa nutkana var. muriculata
(Under Rosa nutkana subsp. nutkana)
Synonym
Rosa nutkana var. nutkana
(Under Rosa nutkana subsp. nutkana)
Synonym
Rosa nutkana var. setosa
(Under Rosa nutkana subsp. nutkana)
Synonym
Rosa pinetorumPINE ROSENative
Rosa pisocarpaCLUSTER ROSENative
Rosa pisocarpa subsp. ahartiiAHART ROSENative
Rosa pisocarpa subsp. pisocarpaCLUSTER or PEA ROSENative
Rosa rubiginosaSWEET-BRIERNaturalized
Rosa spithameaCOAST GROUND ROSENative
Rosa spithamea var. sonomensis
(Under Rosa spithamea)
Synonym
Rosa woodsiiNative
Rosa woodsii subsp. gratissimaMOJAVE ROSENative
Rosa woodsii subsp. ultramontanaINTERIOR ROSENative
Rosa woodsii var. glabrataNative
Rosa woodsii var. gratissimaNative
Rosa woodsii var. ultramontana
(Under Rosa woodsii subsp. ultramontana)
Synonym
Rosa yainacensis
(Under Rosa bridgesii)
Synonym
Rosaceae
  ↳  Key to Rosaceae
ROSE FAMILY
Rostraria cristata
(Under Koeleria gerardi)
Synonym
Rotala
  ↳  Key to Rotala
Rotala catholica
(Under Rotala ramosior)
Synonym
Rotala dentifera
(Under Rotala ramosior)
Synonym
Rotala indicaNaturalized
Rotala ramosiorNative
Rottboellia cylindrica
(Under Hainardia cylindrica)
Synonym
Rubacer parviflorum
(Under Rubus parviflorus)
Synonym
Rubiaceae
  ↳  Key to Rubiaceae
MADDER FAMILY
Rubus
  ↳  Key to Rubus
Rubus almus
(Under Rubus pensilvanicus)
Synonym
Rubus armeniacusHIMALAYAN BLACKBERRYNaturalized
Rubus bernardinus
(Under Rubus leucodermis)
Synonym
Rubus discolor
(Under Rubus armeniacus)
Misapplied name
Rubus eastwoodianus
(Under Rubus ursinus)
Synonym
Rubus franciscanus
(Under Rubus spectabilis)
Synonym
Rubus ganderi
(Under Rubus glaucifolius)
Synonym
Rubus glaucifoliusWAXLEAF RASPBERRYNative
Rubus glaucifolius var. ganderi
(Under Rubus glaucifolius)
Synonym
Rubus inermis
(Under Rubus ulmifolius var. anoplothyrsus)
Synonym
Rubus inermis
(Under Rubus ulmifolius var. anoplothyrsus)
Illegitimate name
Rubus laciniatusCUTLEAF BLACKBERRYNaturalized
Rubus lasiococcusROUGHFRUIT RASPBERRYNative
Rubus lemurum
(Under Rubus ursinus)
Synonym
Rubus leucodermisWHITEBARK RASPBERRYNative
Rubus leucodermis var. bernardinus
(Under Rubus leucodermis)
Synonym
Rubus leucodermis var. glaucifolius
(Under Rubus glaucifolius)
Synonym
Rubus leucodermis var. leucodermis
(Under Rubus leucodermis)
Synonym
Rubus leucodermis var. trinitatis
(Under Rubus leucodermis)
Synonym
Rubus macropetalus
(Under Rubus ursinus)
Synonym
Rubus nivalisSNOW DWARF BRAMBLENative
Rubus nutkanus
(Under Rubus parviflorus)
Synonym
Rubus nutkanus var. bifarius
(Under Rubus parviflorus)
Synonym
Rubus nutkanus var. nuttallii
(Under Rubus parviflorus)
Synonym
Rubus nutkanus var. parviflorus
(Under Rubus parviflorus)
Synonym
Rubus nutkanus var. scopulorum
(Under Rubus parviflorus)
Synonym
Rubus parviflorusTHIMBLEBERRYNative
Rubus parviflorus var. bifarius
(Under Rubus parviflorus)
Synonym
Rubus parviflorus var. hypomalacus
(Under Rubus parviflorus)
Synonym
Rubus parviflorus var. velutinus
(Under Rubus parviflorus)
Synonym
Rubus pensilvanicusNaturalized
Rubus sirbenus
(Under Rubus ursinus)
Synonym
Rubus spectabilisSALMONBERRYNative
Rubus spectabilis var. franciscanus
(Under Rubus spectabilis)
Synonym
Rubus spectabilis var. menziesii
(Under Rubus spectabilis)
Synonym
Rubus stenopetalus
(Under Rubus spectabilis)
Synonym
Rubus titanus
(Under Rubus ursinus)
Synonym
Rubus trinitatis
(Under Rubus leucodermis)
Synonym
Rubus ulmifoliusELMLEAF BLACKBERRYNaturalized
Rubus ulmifolius var. anoplothyrsusNaturalized
Rubus ulmifolius var. inermis
(Under Rubus ulmifolius var. anoplothyrsus)
Synonym
Rubus ulmifolius var. ulmifoliusNaturalized
Rubus ursinusCALIFORNIA BLACKBERRYNative
Rubus ursinus subsp. macropetalus
(Under Rubus ursinus)
Synonym
Rubus ursinus var. eastwoodianus
(Under Rubus ursinus)
Synonym
Rubus ursinus var. macropetalus
(Under Rubus ursinus)
Synonym
Rubus ursinus var. medusae
(Under Rubus ursinus)
Synonym
Rubus ursinus var. pentaphyllus
(Under Rubus ursinus)
Synonym
Rubus ursinus var. sirbenus
(Under Rubus ursinus)
Synonym
Rubus ursinus var. vitifolius
(Under Rubus ursinus)
Synonym
Rubus velutinus
(Under Rubus parviflorus)
Synonym
Rubus vitifolius
(Under Rubus ursinus)
Synonym
Rubus vitifolius subsp. ursinus
(Under Rubus ursinus)
Synonym
Rubus vitifolius var. eastwoodianus
(Under Rubus ursinus)
Synonym
Rubus vitifolius var. titanus
(Under Rubus ursinus)
Synonym
Rudbeckia
  ↳  Key to Rudbeckia
CONE-FLOWER
Rudbeckia californicaCALIFORNIA CONE-FLOWERNative
Rudbeckia californica var. glauca
(Under Rudbeckia glaucescens)
Synonym
Rudbeckia californica var. intermedia
(Under Rudbeckia klamathensis)
Synonym
Rudbeckia glaucescensWAXY CONE-FLOWERNative
Rudbeckia hirta var. pulcherrimaBLACK-EYED SUSANNaturalized
Rudbeckia klamathensisKLAMATH CONE-FLOWERNative
Rudbeckia occidentalisWESTERN CONE-FLOWERNative
Rumex
  ↳  Key to Rumex
DOCK
Rumex acetosellaSHEEP SORRELNaturalized
Rumex angiocarpus
(Under Rumex acetosella)
Synonym
Rumex britannicaNative
Rumex californicusNative
Rumex conglomeratusNaturalized
Rumex crassusNative
Rumex crispusCURLY DOCKNaturalized
Rumex dentatusNaturalized
Rumex dentatus subsp. klotzschianus
(Under Rumex dentatus)
Synonym
Rumex fenestratus
(Under Rumex occidentalis)
Synonym
Rumex fueginusGOLDEN DOCKNative
Rumex hymenosepalusCANAIGRE, WILD-RHUBARBNative
Rumex kerneriNaturalized
Rumex lacustrisNative
Rumex maritimus
(Under Rumex fueginus)
Misapplied name
Rumex obtusifoliusBITTER DOCKNaturalized
Rumex obtusifolius subsp. agrestis
(Under Rumex obtusifolius)
Synonym
Rumex occidentalisWESTERN DOCKNative
Rumex orbiculatus
(Under Rumex britannica)
Synonym
Rumex orbiculatus var. orbiculatus
(Under Rumex britannica)
Synonym
Rumex palustrisHistorical waif
Rumex paucifoliusNative
Rumex paucifolius var. gracilescens
(Under Rumex paucifolius)
Synonym
Rumex persicarioidesNative
Rumex pulcherFIDDLE DOCKNaturalized
Rumex salicifoliusWILLOW DOCKNative
Rumex salicifolius var. crassus
(Under Rumex crassus)
Synonym
Rumex salicifolius var. denticulatus
(Under Rumex californicus)
Synonym
Rumex salicifolius var. lacustris
(Under Rumex lacustris)
Synonym
Rumex salicifolius var. salicifolius
(Under Rumex salicifolius)
Synonym
Rumex salicifolius var. transitorius
(Under Rumex transitorius)
Synonym
Rumex salicifolius var. triangulivalvis
(Under Rumex triangulivalvis)
Synonym
Rumex stenophyllusNaturalized
Rumex transitoriusNative
Rumex triangulivalvisNative
Rumex utahensisNative
Rumex venosusWINGED DOCKNative
Rumex violascensNative
Rupalleya volubilis
(Under Dichelostemma volubile)
Synonym
Rupertia
  ↳  Key to Rupertia
RUPERT'S SCURF-PEA
Rupertia halliiHALL'S RUPERTIANative
Rupertia physodesNative
Rupertia rigidaPARISH'S RUPERTIANative
Ruppia
  ↳  Key to Ruppia
DITCH-GRASS
Ruppia cirrhosaNative
Ruppia maritimaNative
Ruppia occidentalis
(Under Ruppia cirrhosa)
Synonym
Ruppia spiralis
(Under Ruppia cirrhosa)
Synonym
Ruppia spiralis
(Under Ruppia cirrhosa)
Synonym ined.
RuppiaceaeDITCH-GRASS FAMILY
Ruscaceae
  ↳  Key to Ruscaceae
BUTCHER'S-BROOM FAMILY
RutaRUE
Ruta chalepensisNaturalized
Rutaceae
  ↳  Key to Rutaceae
RUE FAMILY
Rytidosperma
  ↳  Key to Rytidosperma
Rytidosperma caespitosa
(Under Rytidosperma caespitosum)
Orthographic variant
Rytidosperma caespitosumNaturalized
Rytidosperma penicillatumHAIRY OAT GRASS, POVERTY GRASSNaturalized
Rytidosperma racemosumNaturalized
Sabulina
  ↳  Key to Sabulina
SANDWORT
Sabulina californicaCALIFORNIA SANDWORTNative
Sabulina cismontanaCISMONTANE MINUARTIANative
Sabulina decumbensTHE LASSICS SANDWORTNative
Sabulina douglasiiDOUGLAS' STITCHWORTNative
Sabulina howelliiHOWELL'S SANDWORTNative
Sabulina nuttalliiNUTTALL'S SANDWORTNative
Sabulina nuttallii var. fragilisNative
Sabulina nuttallii var. gracilisNative
Sabulina nuttallii var. gregariaNative
Sabulina pusillaANNUAL SANDWORTNative
Sabulina roseiPEANUT SANDWORTNative
Sabulina rubellaREDDISH SANDWORTNative
Sabulina stoloniferaSCOTT MOUNTAIN SANDWORTNative
Sabulina strictaBOG SANDWORTNative
Saccharum
Saccharum ravennaeRAVENNA GRASSNaturalized
Sagina
  ↳  Key to Sagina
PEARLWORT
Sagina apetalaDWARF PEARLWORTNaturalized
Sagina apetala var. barbata
(Under Sagina apetala)
Synonym
Sagina crassicaulis
(Under Sagina maxima subsp. crassicaulis)
Synonym
Sagina decumbens subsp. occidentalisWESTERN PEARLWORTNative
Sagina maxima subsp. crassicaulisTHICK-STEMMED PEARLWORTNative
Sagina occidentalis
(Under Sagina decumbens subsp. occidentalis)
Synonym
Sagina procumbensMATTED PEARLWORTNaturalized
Sagina saginoidesARCTIC PEARLWORTNative
Sagina saginoides var. hesperia
(Under Sagina saginoides)
Synonym
Sagina subulataSCOTTISH MOSSWaif
Sagittaria
  ↳  Key to Sagittaria
ARROWHEAD
Sagittaria cuneataNative
Sagittaria latifoliaNative
Sagittaria longilobaNative
Sagittaria montevidensis subsp. calycinaNative
Sagittaria rigidaSESSILE-FRUITED ARROWHEADNaturalized
Sagittaria sanfordiiSANFORD'S ARROWHEADNative
Sairocarpus breweri
(Under Antirrhinum vexillocalyculatum subsp. breweri)
Synonym
Sairocarpus cornutus
(Under Antirrhinum cornutum)
Synonym
Sairocarpus coulterianus
(Under Antirrhinum coulterianum)
Synonym
Sairocarpus kingii
(Under Antirrhinum kingii)
Synonym
Sairocarpus multiflorus
(Under Antirrhinum thompsonii)
Synonym
Sairocarpus subcordatus
(Under Antirrhinum subcordatum)
Synonym
Sairocarpus virga
(Under Antirrhinum virga)
Synonym
Salazaria mexicana
(Under Scutellaria mexicana)
Synonym
Salicaceae
  ↳  Key to Salicaceae
WILLOW FAMILY
Salicornia
  ↳  Key to Salicornia
PICKLEWEED
Salicornia bigeloviiNative
Salicornia depressaNative
Salicornia europaea
(Under Salicornia depressa)
Misapplied name
Salicornia pacificaNative
Salicornia perennisNative
Salicornia rubraNative
Salicornia subterminalis
(Under Arthrocnemum subterminale)
Synonym
Salicornia virginica
(Under Salicornia pacifica)
Misapplied name
Salix
  ↳  Key to Salix
WILLOW
Salix albaWHITE WILLOWNaturalized
Salix alba var. vitellina
(Under Salix alba)
Synonym
Salix arctica
(Under Salix petrophila)
Misapplied name
Salix arctica subsp. petraea
(Under Salix petrophila)
Synonym
Salix babylonicaWEEPING WILLOWNaturalized
Salix bebbianaBEBB'S WILLOWNative
Salix bonplandiana var. laevigata
(Under Salix laevigata)
Synonym
Salix boothiiBOOTH'S WILLOWNative
Salix brachycarpa subsp. brachycarpa
(Under Salix brachycarpa var. brachycarpa)
Synonym
Salix brachycarpa var. brachycarpaSHORT-FRUITED WILLOWNative
Salix breweriBREWER'S WILLOWNative
Salix caudata var. bryantiana
(Under Salix lasiandra var. caudata)
Synonym
Salix cordata var. mackenzieana
(Under Salix prolixa)
Synonym
Salix coulteri
(Under Salix sitchensis)
Synonym
Salix delnortensisDEL NORTE WILLOWNative
Salix drummondianaDRUMMOND'S WILLOWNative
Salix eastwoodiaeSIERRA WILLOWNative
Salix eriocephala subsp. mackenzieana
(Under Salix prolixa)
Synonym
Salix eriocephala var. ligulifolia
(Under Salix ligulifolia)
Synonym
Salix eriocephala var. watsonii
(Under Salix lutea)
Synonym
Salix exigua
  ↳  Key to Salix exigua
Native
Salix exigua subsp. melanopsis
(Under Salix melanopsis)
Synonym
Salix exigua var. exiguaNARROW-LEAVED WILLOW, COYOTE WILLOWNative
Salix exigua var. hindsianaHINDS' WILLOWNative
Salix exigua var. nevadensis
(Under Salix exigua var. exigua)
Synonym
Salix exigua var. stenophylla
(Under Salix exigua var. exigua)
Synonym
Salix geyerianaGEYER'S WILLOWNative
Salix geyeriana var. argentea
(Under Salix geyeriana)
Synonym
Salix gooddingiiGOODDING'S BLACK WILLOWNative
Salix gooddingii var. variabilis
(Under Salix gooddingii)
Synonym
Salix hindsiana
(Under Salix exigua var. hindsiana)
Synonym
Salix hindsiana var. leucodendroides
(Under Salix exigua var. hindsiana)
Synonym
Salix hindsiana var. parishiana
(Under Salix exigua var. hindsiana)
Synonym
Salix hookerianaCOASTAL WILLOWNative
Salix jepsoniiJEPSON'S WILLOWNative
Salix laevigataRED WILLOWNative
Salix laevigata f. araquipa
(Under Salix laevigata)
Synonym
Salix laevigata var. congesta
(Under Salix laevigata)
Synonym
Salix lasiandra
  ↳  Key to Salix lasiandra
Native
Salix lasiandra var. abramsii
(Under Salix lasiandra var. lasiandra)
Synonym
Salix lasiandra var. caudataTAIL-LEAF WILLOWNative
Salix lasiandra var. lancifolia
(Under Salix lasiandra var. lasiandra)
Synonym
Salix lasiandra var. lasiandraPACIFIC WILLOWNative
Salix lasiandra var. macrophylla
(Under Salix lasiandra var. lasiandra)
Synonym
Salix lasiolepisARROYO WILLOWNative
Salix lasiolepis var. bigelovii
(Under Salix lasiolepis)
Synonym
Salix lasiolepis var. bracelinae
(Under Salix lasiolepis)
Synonym
Salix lasiolepis var. lasiolepis
(Under Salix lasiolepis)
Synonym
Salix lasiolepis var. sandbergii
(Under Salix lasiolepis)
Synonym
Salix lemmoniiLEMMON'S WILLOWNative
Salix ligulifoliaSTRAP-LEAFED WILLOWNative
Salix lucida subsp. caudata
(Under Salix lasiandra var. caudata)
Synonym
Salix lucida subsp. lasiandra
(Under Salix lasiandra var. lasiandra)
Synonym
Salix luteaYELLOW WILLOWNative
Salix lutea var. nivaria
(Under Salix lasiolepis)
Synonym
Salix lutea var. watsonii
(Under Salix lutea)
Synonym
Salix mackenzieana
(Under Salix prolixa)
Synonym
Salix macrostachya var. leucodendroides
(Under Salix exigua var. hindsiana)
Synonym
Salix melanopsisDUSKY WILLOWNative
Salix melanopsis var. bolanderiana
(Under Salix melanopsis)
Synonym
Salix melanopsis var. gracilipes
(Under Salix melanopsis)
Synonym
Salix nivalisSNOW WILLOWNative
Salix oresteraGRAY-LEAFED SIERRA WILLOWNative
Salix parksiana
(Under Salix melanopsis)
Synonym
Salix petrophilaROCKY MOUNTAIN WILLOWNative
Salix phylicifolia var. monica
(Under Salix planifolia)
Synonym
Salix piperi
(Under Salix hookeriana)
Synonym
Salix planifoliaTEA-LEAFED WILLOWNative
Salix planifolia subsp. planifolia
(Under Salix planifolia)
Synonym
Salix prolixaMACKENZIE'S WILLOWNative
Salix pseudocordata
(Under Salix boothii)
Unabridged misapplied name
Salix pseudocordata
(Under Salix boothii)
Unabridged misapplied name, in part
Salix purpureaBASKET WILLOWNaturalized
Salix reticulata subsp. nivalis
(Under Salix nivalis)
Synonym
Salix scoulerianaSCOULER'S WILLOWNative
Salix scouleriana var. coetanea
(Under Salix scouleriana)
Synonym
Salix sitchensisSITKA WILLOWNative
Salix sitchensis var. angustifolia
(Under Salix jepsonii)
Synonym
Salix sitchensis var. ralphiana
(Under Salix jepsonii)
Synonym
Salix tracyiTRACY'S WILLOWNative
Salpichroa
Salpichroa origanifoliaNaturalized
Salpichroa rhomboidea
(Under Salpichroa origanifolia)
Synonym
Salsola
  ↳  Key to Salsola
Salsola atriplicifolia
(Under Cycloloma atriplicifolium)
Synonym
Salsola australisNaturalized
Salsola damascenaNaturalized
Salsola gobicolaNaturalized
Salsola iberica
(Under Salsola tragus)
Synonym
Salsola kali subsp. pontica
(Under Salsola australis)
Misapplied name
Salsola kali var. tenuifolia
(Under Salsola australis)
Unabridged misapplied name
Salsola kali var. tenuifolia
(Under Salsola tragus)
Synonym
Salsola paulseniiBARBWIRE RUSSIAN THISTLENaturalized
Salsola paulsenii
(Under Salsola gobicola)
Synonym, in part
Salsola pestifer
(Under Salsola tragus)
Synonym
Salsola ryaniiNaturalized
Salsola sodaNaturalized
Salsola tragusRUSSIAN THISTLE, TUMBLEWEEDNaturalized
Salsola tragus
(Under Salsola australis)
Synonym, in part
Salsola tragus
(Under Salsola gobicola)
Synonym, in part
Salsola vermiculata
(Under Salsola damascena)
Synonym, in part
Saltugilia
  ↳  Key to Saltugilia
Saltugilia australisNative
Saltugilia caruifoliaCARAWAY-LEAVED WOODLAND-GILIANative
Saltugilia grinnellii
(Under Saltugilia splendens)
Illegitimate name
Saltugilia latimeriLATIMER'S WOODLAND-GILIANative
Saltugilia splendensSPLENDID WOODLAND-GILIANative
Saltugilia splendens subsp. grantiiNative
Saltugilia splendens subsp. splendensNative
Salvia
  ↳  Key to Salvia
Salvia aethiopisMEDITERRANEAN SAGENaturalized
Salvia apianaWHITE SAGENative
Salvia brandegeeiBRANDEGEE'S SAGENative
Salvia brandegei
(Under Salvia brandegeei)
Orthographic variant
Salvia carduaceaTHISTLE SAGENative
Salvia carnosa subsp. gilmanii
(Under Salvia dorrii var. dorrii)
Synonym
Salvia clevelandiiNative
Salvia columbariaeCHIANative
Salvia columbariae var. ziegleri
(Under Salvia columbariae)
Synonym
Salvia dorriiNative
Salvia dorrii subsp. argentea
(Under Salvia dorrii var. dorrii)
Synonym
Salvia dorrii subsp. carnosa
(Under Salvia dorrii var. incana)
Synonym
Salvia dorrii subsp. gilmanii
(Under Salvia dorrii var. dorrii)
Synonym
Salvia dorrii var. carnosa
(Under Salvia dorrii var. incana)
Synonym
Salvia dorrii var. dorriiNative
Salvia dorrii var. incanaFLESHY SAGENative
Salvia dorrii var. pilosaNative
Salvia eremostachyaDESERT SAGENative
Salvia funereaDEATH VALLEY SAGENative
Salvia funerea var. fornacis
(Under Salvia funerea)
Synonym
Salvia greataeOROCOPIA SAGENative
Salvia leucophyllaPURPLE SAGENative
Salvia melliferaBLACK SAGENative
Salvia mohavensisNative
Salvia munziiMUNZ'S SAGENative
Salvia pachyphyllaNative
Salvia sonomensisNative
Salvia spathaceaCALIFORNIA HUMMINGBIRD SAGENative
Salvia vaseyiNative
Salvia virgataMEADOW SAGENaturalized
Salvinia
  ↳  Key to Salvinia
Salvinia minimaNaturalized
Salvinia molestaNaturalized
Salvinia oblongifoliaWaif
SalviniaceaeFLOATING-FERN or WATER-SPANGLE FAMILY
Sambucus
  ↳  Key to Sambucus
ELDERBERRY
Sambucus caerulea
(Under Sambucus mexicana)
Synonym
Sambucus melanocarpa
(Under Sambucus racemosa var. melanocarpa)
Synonym
Sambucus mexicanaBLUE ELDERBERRYNative
Sambucus microbotrys
(Under Sambucus racemosa var. racemosa)
Synonym
Sambucus nigra subsp. caerulea
(Under Sambucus mexicana)
Synonym
Sambucus racemosaNative
Sambucus racemosa var. melanocarpaBLACK ELDERBERRYNative
Sambucus racemosa var. microbotrys
(Under Sambucus racemosa var. racemosa)
Synonym
Sambucus racemosa var. racemosaRED ELDERBERRYNative
Samolus
Samolus floribundus
(Under Samolus parviflorus)
Synonym
Samolus parviflorusSEASIDE BROOKWEEDNative
Samolus valerandi subsp. parviflorus
(Under Samolus parviflorus)
Synonym
Sanguisorba
Sanguisorba annua
(Under Poteridium annuum)
Synonym
Sanguisorba minor
(Under Poterium sanguisorba)
Synonym
Sanguisorba minor subsp. muricata
(Under Poterium sanguisorba)
Synonym
Sanguisorba muricata
(Under Sanguisorba officinalis)
Synonym
Sanguisorba occidentalis
(Under Poteridium annuum)
Synonym
Sanguisorba officinalisGREAT BURNETNative
Sanicula
  ↳  Key to Sanicula
Sanicula arctopoidesFOOTSTEPS OF SPRING, YELLOW MATSNative
Sanicula argutaNative
Sanicula bipinnataPOISON SANICLENative
Sanicula bipinnatifidaPURPLE SANICLE, SHOE BUTTONSNative
Sanicula crassicaulisNative
Sanicula graveolensNative
Sanicula hoffmanniiHOFFMANN'S SANICLENative
Sanicula laciniataNative
Sanicula maritimaADOBE SANICLENative
Sanicula peckianaPECK'S SANICLENative
Sanicula saxatilisROCK SANICLENative
Sanicula simulans
(Under Sanicula arguta)
Synonym
Sanicula tracyiTRACY'S SANICLENative
Sanicula tuberosaNative
Santolina
Santolina chamaecyparissusLAVENDER-COTTONWaif
Santolina suaveolens
(Under Matricaria discoidea)
Synonym
Sanvitalia
Sanvitalia abertiiABERT'S SANVITALIANative
Sapindaceae
  ↳  Key to Sapindaceae
SOAPBERRY FAMILY
Sapium sebiferum
(Under Triadica sebifera)
Synonym
SaponariaSOAPWORT
Saponaria hispanica
(Under Gypsophila vaccaria)
Synonym
Saponaria officinalisNaturalized
Saponaria vaccaria
(Under Gypsophila vaccaria)
Synonym
SarcobataceaeSARCOBATUS or GREASEWOOD FAMILY
Sarcobatus
  ↳  Key to Sarcobatus
GREASEWOOD
Sarcobatus baileyiNative
Sarcobatus maximilianii
(Under Sarcobatus vermiculatus)
Synonym
Sarcobatus vermiculatusNative
Sarcobatus vermiculatus var. baileyi
(Under Sarcobatus baileyi)
Synonym
Sarcocornia pacifica
(Under Salicornia pacifica)
Synonym
Sarcocornia perennis
(Under Salicornia perennis)
Synonym
SarcodesSNOW PLANT
Sarcodes sanguineaNative
Sarcostemma crispum
(Under Funastrum crispum)
Synonym
Sarcostemma cynanchoides subsp. hartwegii
(Under Funastrum cynanchoides var. hartwegii)
Synonym
Sarcostemma hirtellum
(Under Funastrum hirtellum)
Synonym
SarraceniaPITCHER-PLANT
Sarracenia purpureaNaturalized
Sarraceniaceae
  ↳  Key to Sarraceniaceae
PITCHER-PLANT FAMILY
Satureja chandleri
(Under Clinopodium chandleri)
Synonym
Satureja douglasii
(Under Clinopodium douglasii)
Synonym
Satureja mimuloides
(Under Clinopodium mimuloides)
Synonym
SaururaceaeLIZARD'S-TAIL FAMILY
Saussurea
Saussurea americanaAMERICAN SAW-WORTNative
Savastana hirta
(Under Anthoxanthum nitens subsp. nitens)
Synonym
Saviniona assurgentiflora
(Under Malva assurgentiflora)
Synonym
Saviniona clementina
(Under Malva assurgentiflora)
Synonym
Saviniona reticulata
(Under Malva assurgentiflora)
Synonym
Saxifraga
  ↳  Key to Saxifraga
SAXIFRAGE
Saxifraga aprica
(Under Micranthes aprica)
Synonym
Saxifraga bryophora
(Under Micranthes bryophora)
Synonym
Saxifraga bryophora var. bryophora
(Under Micranthes bryophora)
Synonym
Saxifraga californica
(Under Micranthes californica)
Synonym
Saxifraga cespitosaTUFTED SAXIFRAGENative
Saxifraga cespitosa var. emarginata
(Under Saxifraga cespitosa)
Synonym
Saxifraga ferruginea
(Under Micranthes ferruginea)
Synonym
Saxifraga ferruginea var. ferruginea
(Under Micranthes ferruginea)
Synonym
Saxifraga fragarioides
(Under Saxifragopsis fragarioides)
Synonym
Saxifraga howellii
(Under Micranthes howellii)
Synonym
Saxifraga hyperboreaNative
Saxifraga integrifolia
(Under Micranthes integrifolia)
Synonym
Saxifraga marshallii
(Under Micranthes marshallii)
Synonym
Saxifraga mertensianaNative
Saxifraga nidifica var. claytoniifolia
(Under Micranthes fragosa)
Synonym
Saxifraga nidifica var. nidifica
(Under Micranthes nidifica)
Synonym
Saxifraga nuttallii
(Under Cascadia nuttallii)
Synonym
Saxifraga odontoloma
(Under Micranthes odontoloma)
Synonym
Saxifraga oregana
(Under Micranthes oregana)
Synonym
Saxifraga peltata
(Under Darmera peltata)
Synonym
Saxifraga rivularis
(Under Saxifraga hyperborea)
Misapplied name
Saxifraga tolmiei
(Under Micranthes tolmiei)
Synonym
Saxifragaceae
  ↳  Key to Saxifragaceae
SAXIFRAGE FAMILY
Saxifragopsis
Saxifragopsis fragarioidesNative
Scabiosa
  ↳  Key to Scabiosa
PINCUSHION FLOWER
Scabiosa atropurpureaNaturalized
Scabiosa stellataWaif
Scandix
Scandix pecten-venerisVENUS' NEEDLENaturalized
SceptridiumGRAPE-FERN
Sceptridium multifidumLEATHER GRAPE-FERNNative
Schedonorus arundinaceus
(Under Festuca arundinacea)
Synonym
Schedonorus phoenix
(Under Festuca arundinacea)
Synonym
Schedonorus pratensis
(Under Festuca pratensis)
Synonym
Scheuchzeria
Scheuchzeria palustrisSCHEUCHZERIANative
Scheuchzeria palustris subsp. americana
(Under Scheuchzeria palustris)
Synonym
Scheuchzeria palustris var. americana
(Under Scheuchzeria palustris)
Synonym
ScheuchzeriaceaeSCHEUCHZERIA FAMILY
Schinus
  ↳  Key to Schinus
Schinus mollePEPPER TREENaturalized
Schinus polygamaCHILEAN PEPPER TREENaturalized
Schinus polygamus
(Under Schinus polygama)
Orthographic variant
Schinus terebinthifoliaBRAZILIAN PEPPER TREENaturalized
Schinus terebinthifolius var. raddianus
(Under Schinus terebinthifolia)
Orthographic variant
Schismus
  ↳  Key to Schismus
MEDITERRANEAN GRASS
Schismus arabicusNaturalized
Schismus barbatusNaturalized
Schizococcus myrtifolius
(Under Arctostaphylos myrtifolia)
Synonym
Schizococcus nissenanus
(Under Arctostaphylos nissenana)
Synonym
Schizotechium jamesianum
(Under Torreyostellaria jamesiana)
Synonym
Schkuhria multiflora
(Under Picradeniopsis multiflora)
Synonym
Schkuhria multiflora var. multiflora
(Under Picradeniopsis multiflora)
Synonym
Schmaltzia trilobata
(Under Rhus aromatica)
Synonym
Schoenolirion album
(Under Hastingsia alba)
Synonym
Schoenoplectus
  ↳  Key to Schoenoplectus
NAKED-STEMMED BULRUSHES
Schoenoplectus acutus var. occidentalisCOMMON TULENative
Schoenoplectus americanusOLNEY'S THREE-SQUARE BULRUSHNative
Schoenoplectus californicusSOUTHERN BULRUSHNative
Schoenoplectus fluviatilis
(Under Bolboschoenus fluviatilis)
Synonym
Schoenoplectus glaucus
(Under Bolboschoenus glaucus)
Synonym
Schoenoplectus heterochaetusSLENDER BULRUSHNative
Schoenoplectus mucronatusROUGH-SEED BULRUSH, RICE-FIELD BULRUSHNaturalized
Schoenoplectus pungens var. badius
(Under Schoenoplectus pungens var. longispicatus)
Synonym
Schoenoplectus pungens var. longispicatusCOMMON THREE-SQUARE BULRUSHNative
Schoenoplectus robustus
(Under Bolboschoenus robustus)
Synonym
Schoenoplectus saximontanusROCKY MOUNTAIN BULRUSHNative
Schoenoplectus subterminalisWATER BULRUSHNative
Schoenoplectus tabernaemontaniSOFT-STEM BULRUSHNative
Schoenoplectus triqueterTHREE-SIDED BULRUSHHistorical waif
Schoenus
Schoenus nigricansBLACK BOG-RUSHNative
Scirpus
  ↳  Key to Scirpus
BULRUSH
Scirpus acutus var. occidentalis
(Under Schoenoplectus acutus var. occidentalis)
Synonym
Scirpus albomarginatus
(Under Eleocharis quadrangulata)
Synonym
Scirpus alpinus
(Under Trichophorum pumilum)
Synonym
Scirpus americanus
(Under Schoenoplectus americanus)
Synonym
Scirpus americanus subsp. monophyllus
(Under Schoenoplectus pungens var. longispicatus)
Synonym, in part
Scirpus americanus var. longispicatus
(Under Schoenoplectus pungens var. longispicatus)
Synonym
Scirpus atropurpureus
(Under Eleocharis atropurpurea)
Synonym
Scirpus autumnalis
(Under Fimbristylis autumnalis)
Synonym
Scirpus bernardinus
(Under Eleocharis bernardina)
Synonym
Scirpus californicus
(Under Schoenoplectus californicus)
Synonym
Scirpus campestris
(Under Bolboschoenus maritimus subsp. paludosus)
Illegitimate name
Scirpus capillaris
(Under Bulbostylis capillaris)
Synonym
Scirpus carinatus
(Under Isolepis carinata)
Illegitimate name
Scirpus cernuus
(Under Isolepis cernua)
Synonym
Scirpus cernuus subsp. californicus
(Under Isolepis cernua)
Synonym
Scirpus cernuus var. californicus
(Under Isolepis cernua)
Synonym
Scirpus clementis
(Under Trichophorum clementis)
Synonym
Scirpus coloradoensis
(Under Eleocharis coloradoensis)
Synonym
Scirpus congdoniiNative
Scirpus cyperinusNaturalized
Scirpus diffususNative
Scirpus emergens
(Under Trichophorum pumilum)
Synonym
Scirpus fluviatilis
(Under Bolboschoenus fluviatilis)
Synonym
Scirpus geniculatus
(Under Eleocharis geniculata)
Synonym
Scirpus glaucus
(Under Bolboschoenus glaucus)
Synonym
Scirpus heterochaetus
(Under Schoenoplectus heterochaetus)
Synonym
Scirpus koilolepis
(Under Isolepis carinata)
Synonym
Scirpus lacustris var. tenuiculmis
(Under Schoenoplectus heterochaetus)
Synonym
Scirpus marginatus
(Under Eleocharis quadrangulata)
Illegitimate name
Scirpus maritimus
(Under Bolboschoenus maritimus subsp. paludosus)
Synonym, in part
Scirpus maritimus var. fluviatilis
(Under Bolboschoenus fluviatilis)
Synonym
Scirpus maritimus var. paludosus
(Under Bolboschoenus maritimus subsp. paludosus)
Synonym
Scirpus microcarpusNative
Scirpus microcarpus var. rubrotinctus
(Under Scirpus microcarpus)
Synonym
Scirpus mucronatus
(Under Schoenoplectus mucronatus)
Synonym
Scirpus nanus
(Under Eleocharis parvula)
Synonym
Scirpus nevadensis
(Under Amphiscirpus nevadensis)
Synonym
Scirpus obtusus
(Under Eleocharis obtusa)
Synonym
Scirpus olneyi
(Under Schoenoplectus americanus)
Synonym
Scirpus ovatus
(Under Eleocharis ovata)
Synonym
Scirpus pacificus
(Under Bolboschoenus maritimus subsp. paludosus)
Synonym
Scirpus paludosus
(Under Bolboschoenus maritimus subsp. paludosus)
Synonym
Scirpus palustris
(Under Eleocharis palustris)
Synonym
Scirpus parvulus
(Under Eleocharis parvula)
Synonym
Scirpus pauciflorus
(Under Eleocharis quinqueflora)
Synonym
Scirpus pendulusPENDULOUS BULRUSHNative
Scirpus pumilus
(Under Trichophorum pumilum)
Synonym
Scirpus pumilus subsp. rollandii
(Under Trichophorum pumilum)
Synonym
Scirpus pumilus var. rollandii
(Under Trichophorum pumilum)
Synonym
Scirpus pungens
(Under Schoenoplectus pungens var. longispicatus)
Synonym, in part
Scirpus quadrangulatus
(Under Eleocharis quadrangulata)
Synonym
Scirpus quinqueflorus
(Under Eleocharis quinqueflora)
Synonym
Scirpus radicans
(Under Eleocharis radicans)
Synonym
Scirpus robustus
(Under Bolboschoenus robustus)
Synonym
Scirpus rollandii
(Under Trichophorum pumilum)
Synonym
Scirpus rostellatus
(Under Eleocharis rostellata)
Synonym
Scirpus rubrotinctus
(Under Scirpus microcarpus)
Synonym
Scirpus saximontanus
(Under Schoenoplectus saximontanus)
Synonym
Scirpus setaceus
(Under Isolepis setacea)
Synonym
Scirpus subterminalis
(Under Schoenoplectus subterminalis)
Synonym
Scirpus tabernaemontani
(Under Schoenoplectus tabernaemontani)
Synonym
Scirpus tenuis
(Under Eleocharis tenuis var. tenuis)
Synonym
Scirpus triqueter
(Under Schoenoplectus triqueter)
Synonym
Scirpus tuberosus
(Under Bolboschoenus glaucus)
Misapplied name
Scirpus vahlii
(Under Fimbristylis vahlii)
Synonym
Scirpus yosemitanus
(Under Trichophorum clementis)
Synonym
Scleranthus
Scleranthus annuus subsp. annuusKNAWELNaturalized
Sclerocactus
  ↳  Key to Sclerocactus
PINEAPPLE CACTUS
Sclerocactus johnsoniiJOHNSON'S BEE-HIVE CACTUSNative
Sclerocactus polyancistrusMOJAVE FISHHOOK CACTUSNative
Sclerochloa
Sclerochloa duraHARDGRASS, FAIRGROUND GRASSNaturalized
Sclerolinon
Sclerolinon digynumNative
Scleropoa rigida
(Under Desmazeria rigida)
Synonym
Scleropogon
Scleropogon brevifoliusBURRO GRASSNative
Scoliopus
Scoliopus bigeloviiNative
ScolymusGOLDENTHISTLE
Scolymus hispanicusNaturalized
Scopulophila
Scopulophila rixfordiiRIXFORD ROCKWORTNative
Scorzonera
Scorzonera hispanicaSPANISH SALSIFY, VIPER'S GRASSNaturalized
ScribneriaSCRIBNER GRASS
Scribneria bolanderiNative
Scrophularia
  ↳  Key to Scrophularia
FIGWORT
Scrophularia atrataBLACK-FLOWERED FIGWORTNative
Scrophularia californicaCALIFORNIA FIGWORTNative
Scrophularia californica subsp. californica
(Under Scrophularia californica)
Synonym
Scrophularia californica subsp. floribunda
(Under Scrophularia californica)
Synonym
Scrophularia californica var. floribunda
(Under Scrophularia californica)
Synonym
Scrophularia desertorumNative
Scrophularia lanceolataNative
Scrophularia peregrinaNaturalized
Scrophularia villosaSANTA CATALINA FIGWORTNative
Scrophulariaceae
  ↳  Key to Scrophulariaceae
FIGWORT FAMILY
Scutellaria
  ↳  Key to Scutellaria
SKULLCAP
Scutellaria angustifolia var. canescens
(Under Scutellaria siphocampyloides)
Synonym
Scutellaria antirrhinoidesNative
Scutellaria austiniae
(Under Scutellaria siphocampyloides)
Synonym
Scutellaria bolanderiNative
Scutellaria bolanderi subsp. austromontanaSOUTHERN MOUNTAINS SKULLCAPNative
Scutellaria bolanderi subsp. bolanderiNative
Scutellaria californicaNative
Scutellaria galericulataMARSH SKULLCAPNative
Scutellaria holmgreniorum
(Under Scutellaria nana)
Synonym
Scutellaria laterifloraSIDE-FLOWERING SKULLCAPNative
Scutellaria linearifolia
(Under Scutellaria siphocampyloides)
Synonym
Scutellaria mexicanaBLADDER-SAGENative
Scutellaria nanaNative
Scutellaria pilosiuscula
(Under Scutellaria tuberosa)
Synonym
Scutellaria sanhedrinsis
(Under Scutellaria antirrhinoides)
Synonym
Scutellaria siphocampyloidesNative
Scutellaria tuberosaNative
Scutellaria tuberosa subsp. similis
(Under Scutellaria tuberosa)
Synonym
Scutellaria viarum
(Under Scutellaria antirrhinoides)
Synonym
Searsia
Searsia lanceaAFRICAN SUMACNaturalized
SecaleRYE
Secale cerealeNaturalized
Securigera varia
(Under Coronilla varia)
Synonym
Sedella
  ↳  Key to Sedella
Sedella congdonii
(Under Sedella pumila)
Synonym
Sedella leiocarpaLAKE COUNTY STONECROPNative
Sedella pentandraNative
Sedella pumilaNative
Sedum
  ↳  Key to Sedum
STONECROP
Sedum albomarginatumFEATHER RIVER STONECROPNative
Sedum albumWHITE STONECROPNaturalized
Sedum anomalum
(Under Sedum spathulifolium)
Synonym
Sedum burnhamii
(Under Sedum obtusatum)
Synonym
Sedum californicum
(Under Sedum spathulifolium)
Synonym
Sedum citrinumBLUE CREEK STONECROPNative
Sedum congdonii
(Under Sedella pumila)
Synonym
Sedum dendroideum subsp. praealtum
(Under Sedum praealtum)
Synonym
Sedum divergensCASCADE STONECROPNative
Sedum douglasii
(Under Sedum stenopetalum)
Synonym
Sedum douglasii subsp. radiatum
(Under Sedum radiatum)
Synonym
Sedum eastwoodiaeRED MOUNTAIN STONECROPNative
Sedum flavidumPALE-YELLOW STONECROPNative
Sedum hallii
(Under Sedum obtusatum)
Synonym
Sedum heckneri
(Under Sedum laxum subsp. heckneri)
Synonym
Sedum kiersteadiaeMOUNT EDDY STONECROPNative
Sedum lanceolatumSPEARLEAF STONECROPNative
Sedum lanceolatum subsp. lanceolatum
(Under Sedum lanceolatum)
Synonym
Sedum lanceolatum subsp. subalpinum
(Under Sedum lanceolatum)
Synonym
Sedum lanceolatum var. lanceolatum
(Under Sedum lanceolatum)
Synonym
Sedum lanceolatum var. nesioticum
(Under Sedum lanceolatum)
Synonym
Sedum lanceolatum var. subalpinum
(Under Sedum lanceolatum)
Illegitimate name
Sedum laxumNative
Sedum laxum subsp. eastwoodiae
(Under Sedum eastwoodiae)
Synonym
Sedum laxum subsp. flavidum
(Under Sedum flavidum)
Synonym
Sedum laxum subsp. heckneriHECKNER'S STONECROPNative
Sedum laxum subsp. latifolium
(Under Sedum laxum subsp. laxum)
Synonym
Sedum laxum subsp. laxumROSEFLOWER STONECROPNative
Sedum laxum subsp. perplexum
(Under Sedum laxum subsp. laxum)
Synonym
Sedum laxum subsp. retusum
(Under Sedum sanhedrinum)
Synonym
Sedum laxum var. eastwoodiae
(Under Sedum eastwoodiae)
Synonym
Sedum laxum var. flavidum
(Under Sedum flavidum)
Synonym
Sedum laxum var. heckneri
(Under Sedum laxum subsp. heckneri)
Synonym
Sedum laxum var. latifolium
(Under Sedum laxum subsp. laxum)
Synonym
Sedum laxum var. laxum
(Under Sedum laxum subsp. laxum)
Synonym
Sedum marmorenseMARBLE MOUNTAINS STONECROPNative
Sedum niveumSNOWY or DAVIDSON'S STONECROPNative
Sedum oblanceolatumAPPLEGATE STONECROPNative
Sedum obtusatumSIERRA STONECROPNative
Sedum obtusatum subsp. boreale
(Under Sedum kiersteadiae)
Synonym
Sedum obtusatum subsp. obtusatum
(Under Sedum obtusatum)
Synonym
Sedum obtusatum subsp. paradisum
(Under Sedum paradisum)
Synonym
Sedum obtusatum subsp. retusum
(Under Sedum flavidum)
Misapplied name
Sedum obtusatum subsp. retusum
(Under Sedum sanhedrinum)
Synonym
Sedum obtusatum var. boreale
(Under Sedum kiersteadiae)
Synonym
Sedum obtusatum var. hallii
(Under Sedum obtusatum)
Synonym
Sedum obtusatum var. paradisum
(Under Sedum paradisum)
Synonym
Sedum obtusatum var. retusum
(Under Sedum sanhedrinum)
Synonym
Sedum oregonenseCREAM STONECROPNative
Sedum paradisumPARADISE STONECROPNative
Sedum paradisum subsp. paradisumCANYON CREEK OR PARADISE STONECROPNative
Sedum paradisum subsp. subroseumPLUMAS STONECROPNative
Sedum patensSMITH RIVER STONECROPNative
Sedum praealtumGREEN COCKSCOMB, GREATER MEXICAN STONECROPNaturalized
Sedum purdyi
(Under Sedum spathulifolium)
Synonym
Sedum radiatumCOAST RANGE STONECROPNative
Sedum radiatum subsp. ciliosum
(Under Sedum stenopetalum subsp. ciliosum)
Synonym
Sedum radiatum subsp. depauperatumDEPAUPERATE or ASHLAND STONECROPNative
Sedum radiatum subsp. radiatumSTAR-FRUITED, COAST RANGE STONECROPNative
Sedum radiatum var. ciliosum
(Under Sedum stenopetalum subsp. ciliosum)
Synonym
Sedum radiatum var. depauperatum
(Under Sedum radiatum subsp. depauperatum)
Synonym
Sedum radiatum var. radiatum
(Under Sedum radiatum subsp. radiatum)
Synonym
Sedum rosea subsp. integrifolium
(Under Rhodiola integrifolia subsp. integrifolia)
Synonym
Sedum roseum subsp. integrifolium
(Under Rhodiola integrifolia subsp. integrifolia)
Orthographic variant
Sedum rubiginosumTEDOC STONECROPNative
Sedum rubroglaucum
(Under Sedum obtusatum)
Synonym
Sedum sanhedrinumSANHEDRIN STONECROPNative
Sedum spathulifoliumBROADLEAF STONECROPNative
Sedum spathulifolium subsp. anomalum
(Under Sedum spathulifolium)
Synonym
Sedum spathulifolium subsp. pruinosum
(Under Sedum spathulifolium)
Synonym
Sedum spathulifolium subsp. purdyi
(Under Sedum spathulifolium)
Synonym
Sedum spathulifolium subsp. spathulifolium
(Under Sedum spathulifolium)
Synonym
Sedum spathulifolium subsp. yosemitense
(Under Sedum spathulifolium)
Synonym
Sedum spathulifolium var. majus
(Under Sedum spathulifolium)
Synonym
Sedum spathulifolium var. minus
(Under Sedum spathulifolium)
Synonym
Sedum spathulifolium var. pruinosum
(Under Sedum spathulifolium)
Synonym
Sedum spathulifolium var. spathulifolium
(Under Sedum spathulifolium)
Synonym
Sedum stenopetalumNative
Sedum stenopetalum subsp. ciliosumPALE WORMLEAF STONECROPNative
Sedum stenopetalum subsp. monanthum
(Under Sedum stenopetalum)
Synonym
Sedum stenopetalum subsp. radiatum
(Under Sedum radiatum)
Synonym
Sedum stenopetalum subsp. stenopetalumYELLOW WORMLEAF STONECROPNative
Sedum stenopetalum var. monanthum
(Under Sedum stenopetalum)
Synonym
Sedum yosemitense
(Under Sedum spathulifolium)
Synonym
Selaginella
  ↳  Key to Selaginella
SPIKE-MOSS
Selaginella asprellaBLUISH SPIKE-MOSSNative
Selaginella bigeloviiNative
Selaginella cinerascensASHY SPIKE-MOSSNative
Selaginella densa var. scopulorum
(Under Selaginella scopulorum)
Synonym
Selaginella eremophilaDESERT SPIKE-MOSSNative
Selaginella hanseniiNative
Selaginella kraussianaNaturalized
Selaginella leucobryoidesMOJAVE SPIKE-MOSSNative
Selaginella oreganaNative
Selaginella scopulorumROCKY MOUNTAIN SPIKE-MOSSNative
Selaginella wallaceiNative
Selaginella watsoniiNative
SelaginellaceaeSPIKE-MOSS FAMILY
Selinocarpus diffusus subsp. nevadensis
(Under Acleisanthes nevadensis)
Synonym
Selinocarpus nevadensis
(Under Acleisanthes nevadensis)
Synonym
Senecio
  ↳  Key to Senecio
RAGWORT, GROUNDSEL, BUTTERWEED
Senecio aphanactisCHAPARRAL RAGWORTNative
Senecio aronicoidesRAYLESS RAGWORTNative
Senecio astephanusSAN GABRIEL RAGWORTNative
Senecio bernardinus
(Under Packera bernardina)
Synonym
Senecio blochmaniaeBLOCHMAN'S RAGWORTNative
Senecio bolanderi
(Under Packera bolanderi var. bolanderi)
Synonym
Senecio bolanderi var. bolanderi
(Under Packera bolanderi var. bolanderi)
Synonym
Senecio breweri
(Under Packera breweri)
Synonym
Senecio californicusCALIFORNIA RAGWORTNative
Senecio canus
(Under Packera cana)
Synonym
Senecio clarkianusCLARK'S RAGWORTNative
Senecio clevelandii
(Under Packera clevelandii)
Synonym
Senecio covillei
(Under Senecio scorzonella)
Synonym
Senecio cymbalarioides
(Under Packera subnuda var. subnuda)
Synonym
Senecio douglasii
(Under Senecio flaccidus var. douglasii)
Synonym
Senecio douglasii var. tularensis
(Under Senecio flaccidus var. douglasii)
Synonym
Senecio elegansRED-PURPLE RAGWORTNaturalized
Senecio eurycephalus var. eurycephalus
(Under Packera eurycephala var. eurycephala)
Synonym
Senecio eurycephalus var. lewisrosei
(Under Packera eurycephala var. lewisrosei)
Synonym
Senecio flaccidusTHREADLEAF RAGWORTNative
Senecio flaccidus var. douglasiiDOUGLAS' THREADLEAF RAGWORTNative
Senecio flaccidus var. monoensisSMOOTH THREADLEAF RAGWORTNative
Senecio foetidus
(Under Senecio hydrophiloides)
Synonym
Senecio foetidus var. hydrophiloides
(Under Senecio hydrophiloides)
Synonym
Senecio fremontiiNative
Senecio fremontii var. fremontiiDWARF MOUNTAIN RAGWORTNative
Senecio fremontii var. occidentalisWESTERN DWARF MOUNTAIN RAGWORTNative
Senecio ganderi
(Under Packera ganderi)
Synonym
Senecio glomeratusCUTLEAF BURNWEEDNaturalized
Senecio greenei
(Under Packera greenei)
Synonym
Senecio hesperius
(Under Packera hesperia)
Synonym
Senecio hydrophiloidesSWEET MARSH RAGWORTNative
Senecio hydrophilusWATER RAGWORT, ALKALI-MARSH RAGWORTNative
Senecio indecorus
(Under Packera indecora)
Synonym
Senecio integerrimusNative
Senecio integerrimus var. exaltatusCOLUMBIA RAGWORTNative
Senecio integerrimus var. majorLAMBS-TONGUE RAGWORTNative
Senecio integerrimus var. ochroleucusPALE-YELLOW RAGWORTNative
Senecio ionophyllus
(Under Packera ionophylla)
Synonym
Senecio jacobaeaTANSY RAGWORTNaturalized
Senecio layneae
(Under Packera layneae)
Synonym
Senecio linearifolius var. linearifoliusLINEAR-LEAVED AUSTRALIAN FIREWEEDNaturalized
Senecio lyoniiISLAND SENECIONative
Senecio macounii
(Under Packera macounii)
Synonym
Senecio mikanioides
(Under Delairea odorata)
Synonym
Senecio minimusCOASTAL BURNWEEDNaturalized
Senecio mohavensisMOJAVE RAGWORTNative
Senecio multilobatus
(Under Packera multilobata)
Synonym
Senecio pattersonensisMOUNT PATTERSON SENECIONative
Senecio pauciflorus
(Under Packera pauciflora)
Synonym
Senecio pseudaureus var. pseudaureus
(Under Packera pseudaurea var. pseudaurea)
Synonym
Senecio quadridentatusCOTTON BURNWEEDNaturalized
Senecio scorzonellaSIERRA RAGWORTNative
Senecio serra var. serraTALL RAGWORT, SAWTOOTH GROUNDSELNative
Senecio spartioidesBROOM-LIKE RAGWORTNative
Senecio spartioides var. multicapitatus
(Under Senecio spartioides)
Synonym
Senecio streptanthifolius
(Under Packera streptanthifolia var. streptanthifolia)
Synonym
Senecio sylvaticusWOODLAND RAGWORTNaturalized
Senecio triangularisARROWLEAF RAGWORTNative
Senecio vulgarisCOMMON GROUNDSELNaturalized
Senecio werneriifolius
(Under Packera werneriifolia)
Synonym
Senegalia
Senegalia greggiiCATCLAW, DEVIL'S CLAWNative
Senna
  ↳  Key to Senna
Senna armataSPINY SENNANative
Senna artemisioidesSILVER SENNANaturalized
Senna covesiiCOUES' CASSIANative
Senna didymobotryaNaturalized
Senna eremophila
(Under Senna artemisioides)
Synonym ined.
Senna marilandicaMARYLAND SENNAWaif
Senna multiglandulosaNaturalized
Septimia multicava
(Under Crassula multicava subsp. multicava)
Synonym
SequoiaREDWOOD
Sequoia sempervirensNative
SequoiadendronGIANT SEQUOIA
Sequoiadendron giganteumNative
SericocarpusWHITE-TOPPED ASTER
Sericocarpus oregonensis
  ↳  Key to Sericocarpus oregonensis
Native
Sericocarpus oregonensis subsp. californicusNative
Sericocarpus oregonensis subsp. oregonensisNative
Sericocarpus oregonensis var. californicus
(Under Sericocarpus oregonensis subsp. californicus)
Synonym
Sericocarpus oregonensis var. oregonensis
(Under Sericocarpus oregonensis subsp. oregonensis)
Synonym
Sericocarpus tomentellus
(Under Doellingeria tomentella)
Synonym
Sesbania
  ↳  Key to Sesbania
Sesbania exaltata
(Under Sesbania herbacea)
Synonym
Sesbania herbaceaBIGPOD SESBANIA, COFFEE WEED, COLORADO RIVER HEMPNative
Sesbania puniceaSCARLET SESBANNaturalized
Sesbania tripetii
(Under Sesbania punicea)
Synonym
SesuviumSEA-PURSLANE
Sesuvium portulacastrum
(Under Trianthema portulacastrum)
Synonym
Sesuvium verrucosumWESTERN SEA-PURSLANENative
Setaria
  ↳  Key to Setaria
BRISTLE GRASS
Setaria adhaerensBUR BRISTLE GRASSNaturalized
Setaria carnei
(Under Setaria verticillata)
Misapplied name
Setaria faberiCHINESE FOXTAILNaturalized
Setaria geniculata
(Under Setaria parviflora)
Misapplied name
Setaria glauca
(Under Setaria pumila subsp. pumila)
Synonym
Setaria gracilis
(Under Setaria parviflora)
Synonym
Setaria lutescens
(Under Setaria pumila subsp. pumila)
Synonym
Setaria parvifloraKNOTROOT BRISTLE GRASSNative
Setaria pumila subsp. pumilaYELLOW BRISTLE GRASSNaturalized
Setaria sphacelataAFRICAN BRISTLE GRASSNaturalized
Setaria verticillataHOOKED BRISTLE GRASSNaturalized
Setaria viridisGREEN BRISTLE GRASSNaturalized
Seubertia crocea
(Under Triteleia crocea)
Synonym
Seubertia laxa
(Under Triteleia laxa)
Synonym
Seubertia obscura
(Under Triteleia laxa)
Synonym
Shepherdia
  ↳  Key to Shepherdia
Shepherdia argenteaBUFFALO-BERRYNative
Shepherdia canadensisCANADIAN BUFFALO-BERRYNative
Sherardia
Sherardia arvensisFIELD MADDERNaturalized
Sibara
  ↳  Key to Sibara
Sibara desertiDESERT WINGED ROCKCRESSNative
Sibara filifoliaSANTA CRUZ ISLAND ROCKCRESSNative
Sibara rosulata
(Under Sibara deserti)
Synonym
Sibara virginica
(Under Planodes virginica)
Synonym
Sibaropsis
Sibaropsis hammittiiHAMMITT'S CLAY-CRESSNative
Sibbaldia
Sibbaldia procumbensNative
Sida
  ↳  Key to Sida
Sida leprosa var. hederacea
(Under Malvella leprosa)
Synonym
Sida rhombifoliaSIDA, RHOMBUS-LEAVED SIDAWaif
Sida spinosaPRICKLY SIDAAgricultural weed
Sidalcea
  ↳  Key to Sidalcea
CHECKERBLOOM
Sidalcea asprellaNative
Sidalcea asprella subsp. asprellaHARSH CHECKERBLOOM, SIERRA FOOTHILLS CHECKERBLOOMNative
Sidalcea asprella subsp. nanaDWARF SIERRAN CHECKERBLOOMNative
Sidalcea calycosaVERNAL POOL CHECKERBLOOMNative
Sidalcea calycosa subsp. calycosaVERNAL POOL CHECKERBLOOM, HOGWALLOW CHECKERBLOOMNative
Sidalcea calycosa subsp. rhizomataPOINT REYES CHECKERBLOOMNative
Sidalcea celataREDDING CHECKERBLOOMNative
Sidalcea covilleiOWENS VALLEY CHECKERBLOOMNative
Sidalcea delphiniifolia
(Under Sidalcea malviflora subsp. malviflora)
Synonym
Sidalcea diploscyphaFRINGED CHECKERBLOOMNative
Sidalcea elegansDEL NORTE CHECKERBLOOMNative
Sidalcea favosa
(Under Sidalcea reptans)
Synonym
Sidalcea giganteaGIANT CHECKERBLOOMNative
Sidalcea glaucescensWAXY CHECKERBLOOMNative
Sidalcea hartwegiiHARTWEG'S CHECKERBLOOMNative
Sidalcea hickmaniiNative
Sidalcea hickmanii subsp. anomalaCUESTA PASS CHECKERBLOOMNative
Sidalcea hickmanii subsp. hickmaniiHICKMAN'S CHECKERBLOOMNative
Sidalcea hickmanii subsp. napensisNAPA CHECKERBLOOMNative
Sidalcea hickmanii subsp. parishiiPARISH'S CHECKERBLOOMNative
Sidalcea hickmanii subsp. pillsburiensisLAKE PILLSBURY CHECKERBLOOMNative
Sidalcea hickmanii subsp. viridisMARIN CHECKERBLOOMNative
Sidalcea hickmanii var. parishii
(Under Sidalcea hickmanii subsp. parishii)
Synonym
Sidalcea hirsutaHAIRY CHECKERBLOOMNative
Sidalcea keckiiKECK'S CHECKERBLOOMNative
Sidalcea malachroidesMAPLE-LEAVED CHECKERBLOOMNative
Sidalcea malvifloraCHECKERBLOOM, CHECKERMALLOWNative
Sidalcea malviflora subsp. asprella
(Under Sidalcea asprella subsp. asprella)
Synonym
Sidalcea malviflora subsp. californicaCHAPARRAL CHECKERBLOOM, CALIFORNIA CHECKERBLOOMNative
Sidalcea malviflora subsp. celata
(Under Sidalcea celata)
Synonym
Sidalcea malviflora subsp. dolosaBEAR VALLEY CHECKERBLOOMNative
Sidalcea malviflora subsp. elegans
(Under Sidalcea elegans)
Synonym
Sidalcea malviflora subsp. laciniataGERANIUM-LEAVED CHECKERBLOOMNative
Sidalcea malviflora subsp. malvifloraNative
Sidalcea malviflora subsp. nana
(Under Sidalcea asprella subsp. nana)
Synonym
Sidalcea malviflora subsp. patulaSISKIYOU CHECKERBLOOMNative
Sidalcea malviflora subsp. purpureaPURPLE-STEMMED CHECKERBLOOMNative
Sidalcea malviflora subsp. rostrataSEACLIFF CHECKERBLOOMNative
Sidalcea malviflora subsp. sparsifolia
(Under Sidalcea sparsifolia)
Synonym
Sidalcea malviflora var. celata
(Under Sidalcea celata)
Synonym
Sidalcea malviflora var. hirsuta
(Under Sidalcea sparsifolia)
Synonym
Sidalcea malviflora var. stellata
(Under Sidalcea sparsifolia)
Synonym
Sidalcea malviflora var. uliginosa
(Under Sidalcea sparsifolia)
Synonym
Sidalcea montana
(Under Sidalcea glaucescens)
Synonym
Sidalcea multifidaCUT-LEAF CHECKERBLOOMNative
Sidalcea neomexicanaSALT SPRING CHECKERBLOOMNative
Sidalcea neomexicana subsp. thurberi
(Under Sidalcea neomexicana)
Synonym
Sidalcea oreganaNative
Sidalcea oregana subsp. eximiaCOAST CHECKERBLOOMNative
Sidalcea oregana subsp. hydrophilaMARSH CHECKERBLOOMNative
Sidalcea oregana subsp. oreganaOREGON CHECKERBLOOMNative
Sidalcea oregana subsp. spicataNative
Sidalcea oregana subsp. validaKENWOOD MARSH CHECKERBLOOMNative
Sidalcea pedataBIRD-FOOT CHECKERBLOOMNative
Sidalcea ranunculaceaNative
Sidalcea reptansNative
Sidalcea reptans var. nana
(Under Sidalcea asprella subsp. nana)
Synonym
Sidalcea rhizomata
(Under Sidalcea calycosa subsp. rhizomata)
Synonym
Sidalcea robustaBUTTE COUNTY CHECKERBLOOMNative
Sidalcea rostrata
(Under Sidalcea malviflora subsp. rostrata)
Synonym
Sidalcea setosaBRISTLY CHECKERBLOOMNative
Sidalcea setosa
(Under Sidalcea oregana subsp. spicata)
Synonym, in part
Sidalcea setosa var. setosa
(Under Sidalcea oregana subsp. spicata)
Synonym
Sidalcea sparsifoliaSOUTHERN CHECKERBLOOMNative
Sidalcea stipularisSCADDEN FLAT CHECKERBLOOMNative
Sidotheca
  ↳  Key to Sidotheca
STARRY PUNCTUREBRACT
Sidotheca caryophylloidesCHICKWEED OXYTHECANative
Sidotheca emarginataWHITE-MARGINED OXYTHECANative
Sidotheca trilobataTHREE-LOBED STARRY PUNCTUREBRACTNative
Sieglingia decumbens
(Under Danthonia decumbens)
Synonym
Silene
  ↳  Key to Silene
CATCHFLY, CAMPION
Silene antirrhinaSLEEPY CATCHFLYNative
Silene apertaNAKED CATCHFLY, TULARE CAMPIONNative
Silene armeria
(Under Atocion armeria)
Synonym
Silene bernardinaPALMER'S CATCHFLYNative
Silene bernardina subsp. bernardina
(Under Silene bernardina)
Synonym
Silene bernardina subsp. maguirei
(Under Silene bernardina)
Synonym
Silene bernardina var. rigidula
(Under Silene bernardina)
Synonym
Silene bernardina var. sierrae
(Under Silene bernardina)
Synonym
Silene bolanderiBOLANDER'S CATCHFLYNative
Silene bridgesiiBRIDGES' CATCHFLYNative
Silene californica
(Under Silene laciniata subsp. californica)
Synonym
Silene campanulata
(Under Silene greenei)
Illegitimate name
Silene campanulata subsp. campanulata
(Under Silene greenei subsp. angustifolia)
Illegitimate name
Silene campanulata subsp. glandulosa
(Under Silene greenei subsp. greenei)
Synonym
Silene campanulata subsp. greenei
(Under Silene greenei subsp. greenei)
Synonym
Silene campanulata var. petrophila
(Under Silene greenei subsp. greenei)
Synonym
Silene coniflora
(Under Silene multinervia)
Misapplied name
Silene conoideaLARGE SAND CATCHFLYNaturalized
Silene coronaria
(Under Lychnis coronaria)
Synonym
Silene cucubalus
(Under Silene vulgaris)
Synonym
Silene dichotoma subsp. dichotomaFORKED CATCHFLYNaturalized
Silene douglasii var. douglasiiDOUGLAS' CATCHFLYNative
Silene douglasii var. monantha
(Under Silene douglasii var. douglasii)
Synonym
Silene gallicaSMALL-FLOWER CATCHFLY, WINDMILL PINKNaturalized
Silene grandis
(Under Silene scouleri subsp. scouleri)
Synonym
Silene grayiGRAY'S CATCHFLYNative
Silene greeneiNative
Silene greenei subsp. angustifoliaRED MOUNTAIN CATCHFLYNative
Silene greenei subsp. greeneiBELL CATCHFLYNative
Silene hookeriHOOKER'S CATCHFLYNative
Silene hookeri subsp. bolanderi
(Under Silene bolanderi)
Synonym
Silene hookeri subsp. pulverulenta
(Under Silene hookeri)
Synonym
Silene hookeri subsp. serpentinicola
(Under Silene serpentinicola)
Synonym
Silene invisaSHORT-PETALED CAMPIONNative
Silene krantziiKRANTZ'S CATCHFLYNative
Silene laciniataNative
Silene laciniata subsp. brandegeei
(Under Silene laciniata subsp. laciniata)
Synonym
Silene laciniata subsp. californicaCALIFORNIA PINKNative
Silene laciniata subsp. laciniataMEXICAN PINKNative
Silene laciniata subsp. major
(Under Silene laciniata subsp. laciniata)
Synonym
Silene laciniata var. angustifolia
(Under Silene laciniata subsp. laciniata)
Synonym
Silene laciniata var. latifolia
(Under Silene laciniata subsp. laciniata)
Synonym
Silene latifoliaWHITE CAMPIONNaturalized
Silene latifolia subsp. alba
(Under Silene latifolia)
Synonym
Silene lemmoniiLEMMON'S CATCHFLYNative
Silene marmorensisMARBLE MOUNTAIN CAMPIONNative
Silene menziesiiMENZIES' CATCHFLYNative
Silene montana subsp. bernardina
(Under Silene bernardina)
Illegitimate name
Silene montana subsp. montana
(Under Silene bernardina)
Illegitimate name
Silene montana var. rigidula
(Under Silene bernardina)
Illegitimate name
Silene montana var. sierrae
(Under Silene bernardina)
Illegitimate name
Silene multinerviaMULTINERVED CATCHFLYNative
Silene nelsoniiNELSON'S STRINGFLOWERNative
Silene noctifloraNIGHT-FLOWERING CATCHFLYNaturalized
Silene nudaSTICKY CATCHFLYNative
Silene nuda subsp. insectivora
(Under Silene nuda)
Synonym
Silene occidentalisWESTERN CAMPIONNative
Silene occidentalis subsp. longistipitata
(Under Silene occidentalis)
Synonym
Silene occidentalis subsp. occidentalis
(Under Silene occidentalis)
Synonym
Silene oreganaOREGON CAMPIONNative
Silene parishiiPARISH'S CATCHFLYNative
Silene parishii var. latifolia
(Under Silene parishii)
Synonym
Silene parishii var. viscida
(Under Silene parishii)
Synonym
Silene pseudatocionWaif
Silene salmonaceaKLAMATH MOUNTAIN CATCHFLY, SALMON-FLOWERED CATCHFLYNative
Silene sargentiiSARGENT'S CATCHFLYNative
Silene scouleri subsp. grandis
(Under Silene scouleri subsp. scouleri)
Synonym
Silene scouleri subsp. scouleriSCOULER'S CATCHFLYNative
Silene scouleri var. pacifica
(Under Silene scouleri subsp. scouleri)
Synonym
Silene scouleri var. scouleri
(Under Silene scouleri subsp. scouleri)
Synonym
Silene serpentinicolaSERPENTINE CATCHFLYNative
Silene suksdorfiiCASCADE ALPINE CAMPION, SUKSDORF'S CATCHFLYNative
Silene verecundaSAN FRANCISCO CAMPIONNative
Silene verecunda subsp. andersonii
(Under Silene verecunda)
Synonym
Silene verecunda subsp. platyota
(Under Silene verecunda)
Synonym
Silene verecunda subsp. verecunda
(Under Silene verecunda)
Synonym
Silene verecunda var. eglandulosa
(Under Silene verecunda)
Synonym
Silene verecunda var. platyota
(Under Silene verecunda)
Synonym
Silene verecunda var. verecunda
(Under Silene verecunda)
Synonym
Silene vulgarisBLADDER CAMPIONNaturalized
SilybumMILK THISTLE
Silybum marianumNaturalized
Simaroubaceae
  ↳  Key to Simaroubaceae
QUASSIA or SIMAROUBA FAMILY
SimmondsiaGOAT-NUT, JOJOBA
Simmondsia californica
(Under Simmondsia chinensis)
Synonym
Simmondsia chinensisNative
SimmondsiaceaeJOJOBA FAMILY
Simpsonanthus
Simpsonanthus jonesiiSIMPSON'S POPCORNFLOWER, MOJAVE POPCORNFLOWERNative
Sinapis
  ↳  Key to Sinapis
Sinapis albaWHITE MUSTARDNaturalized
Sinapis arvensisCHARLOCKNaturalized
Sisymbrium
  ↳  Key to Sisymbrium
Sisymbrium altissimumTUMBLE MUSTARDNaturalized
Sisymbrium erysimoidesNaturalized
Sisymbrium irioLONDON ROCKETNaturalized
Sisymbrium loeseliiNaturalized
Sisymbrium officinaleHEDGE MUSTARDNaturalized
Sisymbrium orientaleNaturalized
Sisyrinchium
  ↳  Key to Sisyrinchium
Sisyrinchium bellumWESTERN BLUE-EYED-GRASSNative
Sisyrinchium boreale
(Under Sisyrinchium californicum)
Synonym
Sisyrinchium brachypus
(Under Sisyrinchium californicum)
Synonym
Sisyrinchium californicumGOLDEN-EYED-GRASSNative
Sisyrinchium douglasii var. douglasii
(Under Olsynium douglasii var. douglasii)
Synonym
Sisyrinchium eastwoodiae
(Under Sisyrinchium bellum)
Synonym
Sisyrinchium elmeriELMER'S BLUE-EYED-GRASSNative
Sisyrinchium flavidum
(Under Sisyrinchium californicum)
Synonym
Sisyrinchium funereumDEATH VALLEY BLUE-EYED-GRASSNative
Sisyrinchium grandiflorum
(Under Olsynium douglasii var. douglasii)
Illegitimate name
Sisyrinchium greenei
(Under Sisyrinchium bellum)
Synonym
Sisyrinchium halophilumNEVADA BLUE-EYED-GRASSNative
Sisyrinchium hesperium
(Under Sisyrinchium bellum)
Synonym
Sisyrinchium hitchcockiiHITCHCOCK'S BLUE-EYED-GRASSNative
Sisyrinchium idahoenseIDAHO BLUE-EYED-GRASSNative
Sisyrinchium idahoense var. idahoenseNative
Sisyrinchium idahoense var. occidentaleNative
Sisyrinchium leptocaulon
(Under Sisyrinchium halophilum)
Synonym
Sisyrinchium lineatum
(Under Sisyrinchium californicum)
Synonym
Sisyrinchium longipesTIMBERLAND BLUE-EYED-GRASSNative
Sisyrinchium maritimum
(Under Sisyrinchium bellum)
Synonym
Sisyrinchium occidentale
(Under Sisyrinchium idahoense var. occidentale)
Synonym
Sisyrinchium oreophilum
(Under Sisyrinchium idahoense var. idahoense)
Synonym
Sisyrinchium oreophilum var. occidentale
(Under Sisyrinchium idahoense var. occidentale)
Synonym
Sitanion hystrix
(Under Elymus elymoides)
Synonym
Sitanion hystrix var. californicum
(Under Elymus elymoides var. californicus)
Synonym
Sitanion hystrix var. hystrix
(Under Elymus elymoides var. elymoides)
Synonym, in part
Sitanion jubatum
(Under Elymus multisetus)
Synonym
Sitanion longifolium
(Under Elymus elymoides var. brevifolius)
Synonym
Sium
Sium suaveNative
Smelowskia
Smelowskia ovalisNative
Smelowskia ovalis var. congesta
(Under Smelowskia ovalis)
Synonym
SmilacaceaeSMILAX FAMILY
Smilacina racemosa
(Under Maianthemum racemosum)
Synonym
Smilacina racemosa var. amplexicaulis
(Under Maianthemum racemosum)
Synonym
Smilacina racemosa var. glabra
(Under Maianthemum racemosum)
Synonym
Smilacina stellata
(Under Maianthemum stellatum)
Synonym
Smilacina stellata var. sessilifolia
(Under Maianthemum stellatum)
Synonym
Smilax
  ↳  Key to Smilax
GREENBRIER
Smilax californicaNative
Smilax jamesiiENGLISH PEAK GREENBRIERNative
Solanaceae
  ↳  Key to Solanaceae
NIGHTSHADE FAMILY
Solanoa purpurescens
(Under Asclepias solanoana)
Synonym
Solanum
  ↳  Key to Solanum
NIGHTSHADE
Solanum americanumNative
Solanum aviculareNaturalized
Solanum carolinenseCAROLINA HORSE-NETTLENaturalized
Solanum clokeyi
(Under Solanum wallacei)
Synonym
Solanum dimidiatumTORREY'S NIGHTSHADEUrban weed
Solanum douglasiiNative
Solanum dulcamaraNaturalized
Solanum elaeagnifoliumWHITE HORSE-NETTLENaturalized
Solanum furcatumNaturalized
Solanum lanceolatumLANCELEAF NIGHTSHADENaturalized
Solanum lycopersicum
(Under Lycopersicon esculentum)
Synonym
Solanum marginatumWHITE-MARGINED NIGHTSHADENaturalized
Solanum nigrumBLACK NIGHTSHADENaturalized
Solanum nodiflorum
(Under Solanum americanum)
Synonym
Solanum parishiiNative
Solanum peruvianum
(Under Lycopersicon peruvianum)
Synonym
Solanum physalifolium var. nitidibaccatumNaturalized
Solanum rostratumBUFFALOBURNaturalized
Solanum sarrachoides
(Under Solanum physalifolium var. nitidibaccatum)
Misapplied name
Solanum sisymbriifoliumNaturalized
Solanum tenuilobatum
(Under Solanum xanti)
Synonym
Solanum torreyi
(Under Solanum dimidiatum)
Synonym
Solanum triflorumNaturalized
Solanum umbelliferumNative
Solanum umbelliferum var. glabrescens
(Under Solanum umbelliferum)
Synonym
Solanum umbelliferum var. incanum
(Under Solanum umbelliferum)
Synonym
Solanum wallaceiWALLACE'S NIGHTSHADENative
Solanum wallacei var. clokeyi
(Under Solanum wallacei)
Synonym
Solanum xantiNative
Solanum xanti var. hoffmannii
(Under Solanum xanti)
Synonym
Solanum xanti var. intermedium
(Under Solanum xanti)
Synonym
Solanum xanti var. montanum
(Under Solanum xanti)
Synonym
Solanum xanti var. obispoense
(Under Solanum xanti)
Synonym
SoleiroliaBABY'S TEARS
Soleirolia soleiroliiNaturalized
Solidago
  ↳  Key to Solidago
GOLDENROD
Solidago altissima subsp. altissimaLATE GOLDENRODNaturalized
Solidago altissima var. altissima
(Under Solidago altissima subsp. altissima)
Synonym
Solidago californica
(Under Solidago velutina subsp. californica)
Synonym
Solidago canadensis subsp. elongata
(Under Solidago elongata)
Synonym
Solidago canadensis var. elongata
(Under Solidago elongata)
Synonym
Solidago canadensis var. salebrosa
(Under Solidago lepida var. salebrosa)
Synonym
Solidago confinisSOUTHERN GOLDENRODNative
Solidago elongataWEST COAST CANADA GOLDENRODNative
Solidago gigantea
(Under Solidago lepida var. salebrosa)
Misapplied name
Solidago guiradonisGUIRADO'S GOLDENRODNative
Solidago guiradonis var. spectabilis
(Under Solidago spectabilis)
Synonym
Solidago lepida var. salebrosaWESTERN GOLDENRODNative
Solidago missouriensis
(Under Solidago spectabilis)
Misapplied name
Solidago multiradiataNORTHERN GOLDENRODNative
Solidago occidentalis
(Under Euthamia occidentalis)
Synonym
Solidago sparsiflora
(Under Solidago velutina subsp. sparsiflora)
Synonym
Solidago spathulataCOAST GOLDENRODNative
Solidago spectabilisSHOWY GOLDENRODNative
Solidago spectabilis var. confinis
(Under Solidago confinis)
Synonym
Solidago velutinaVELVETY GOLDENRODNative
Solidago velutina subsp. californicaCALIFORNIA GOLDENRODNative
Solidago velutina subsp. sparsifloraNative
Soliva
Soliva daucifolia
(Under Soliva sessilis)
Synonym
Soliva pterosperma
(Under Soliva sessilis)
Synonym
Soliva sessilisNaturalized
Sollya heterophylla
(Under Billardiera heterophylla)
Synonym
Sonchus
  ↳  Key to Sonchus
SOW THISTLE
Sonchus arvensisPERENNIAL SOW THISTLENaturalized
Sonchus arvensis subsp. arvensisAgricultural weed
Sonchus arvensis subsp. uliginosusNaturalized
Sonchus asper subsp. asperPRICKLY SOW THISTLENaturalized
Sonchus oleraceusCOMMON SOW THISTLENaturalized
Sonchus tenerrimusNaturalized
Sonnea
Sonnea hispidaCASCADE POPCORNFLOWER, BRISTLY POPCORNFLOWERNative
Sophia nelsonii
(Under Descurainia nelsonii)
Synonym
Sophora secundiflora
(Under Calia secundiflora)
Synonym
Sorbus
  ↳  Key to Sorbus
MOUNTAIN ASH
Sorbus aucupariaEUROPEAN MOUNTAIN ASHWaif
Sorbus californicaCALIFORNIA MOUNTAIN ASHNative
Sorbus cascadensis
(Under Sorbus scopulina)
Synonym
Sorbus occidentalis
(Under Sorbus sitchensis var. grayi)
Synonym
Sorbus scopulinaROCKY MOUNTAIN or CASCADE MOUNTAIN ASHNative
Sorbus scopulina var. cascadensis
(Under Sorbus scopulina)
Synonym
Sorbus sitchensisNative
Sorbus sitchensis var. densa
(Under Sorbus scopulina)
Synonym
Sorbus sitchensis var. grayiDWARF or GRAY'S MOUNTAIN ASHNative
Sorbus sitchensis var. sitchensisSITKA MOUNTAIN ASHNative
Sorghum
  ↳  Key to Sorghum
Sorghum bicolorSORGHUMNaturalized
Sorghum halepenseJOHNSON GRASSNaturalized
Sorghum lanceolatum
(Under Sorghum bicolor)
Synonym
Sorghum sudanense
(Under Sorghum bicolor)
Synonym
Sorghum virgatum
(Under Sorghum bicolor)
Synonym
Sparaxis
  ↳  Key to Sparaxis
SPARAXIS
Sparaxis grandifloraBUTTER CUPWaif
Sparaxis tricolorHARLEQUIN FLOWERWaif
Sparganium
  ↳  Key to Sparganium
BUR-REED
Sparganium angustifoliumNARROW-LEAVED BUR-REEDNative
Sparganium angustifolium subsp. emersum
(Under Sparganium emersum)
Synonym
Sparganium angustifolium var. multipedunculatum
(Under Sparganium angustifolium)
Synonym
Sparganium chlorocarpum
(Under Sparganium emersum)
Synonym
Sparganium chlorocarpum var. acaule
(Under Sparganium emersum)
Synonym
Sparganium emersumNative
Sparganium emersum subsp. acaule
(Under Sparganium emersum)
Synonym
Sparganium emersum var. multipedunculatum
(Under Sparganium angustifolium)
Synonym
Sparganium erectum subsp. stoloniferum
(Under Sparganium eurycarpum var. greenei)
Synonym
Sparganium eurycarpumNative
Sparganium eurycarpum subsp. eurycarpum
(Under Sparganium eurycarpum var. eurycarpum)
Synonym
Sparganium eurycarpum var. eurycarpumNative
Sparganium eurycarpum var. greeneiNative
Sparganium greenei
(Under Sparganium eurycarpum var. greenei)
Synonym
Sparganium minimum
(Under Sparganium natans)
Synonym
Sparganium multipedunculatum
(Under Sparganium angustifolium)
Synonym
Sparganium natansSMALL BUR-REEDNative
Sparganium simplex var. multipedunculatum
(Under Sparganium angustifolium)
Synonym
Spartina
  ↳  Key to Spartina
CORD GRASS
Spartina alternifloraSALT-WATER CORD GRASSNaturalized
Spartina densifloraDENSE-FLOWERED CORD GRASSNaturalized
Spartina foliosaCALIFORNIA CORD GRASSNative
Spartina gracilisALKALI CORD GRASSNative
Spartina patensSALT-MEADOW CORD GRASSNaturalized
Spartium
Spartium junceumSPANISH BROOMNaturalized
SpergulaSPURREY
Spergula arvensisSTICKWORT, STARWORTNaturalized
Spergularia
  ↳  Key to Spergularia
SAND-SPURREY
Spergularia atrospermaBLACK SEED SAND-SPURREYNative
Spergularia bocconei
(Under Spergularia bocconi)
Orthographic variant
Spergularia bocconiBOCCONE'S SAND-SPURREYNaturalized
Spergularia canadensis var. occidentalisWESTERN SAND-SPURREYNative
Spergularia macrothecaSTICKY SAND-SPURREYNative
Spergularia macrotheca var. leucanthaNative
Spergularia macrotheca var. longistylaNative
Spergularia macrotheca var. macrothecaNative
Spergularia marinaSALTMARSH SAND-SPURREYNative
Spergularia marina var. tenuis
(Under Spergularia marina)
Synonym
Spergularia maritima
(Under Spergularia media var. media)
Synonym
Spergularia media var. mediaGREATER SEA-SPURREYNaturalized
Spergularia platensis var. platensisLA PLATA SAND-SPURREYNaturalized
Spergularia rubraRED SAND-SPURREYNaturalized
Spergularia salina
(Under Spergularia marina)
Synonym
Spergularia villosaHAIRY SAND-SPURREYNaturalized
Spermolepis
Spermolepis echinataBRISTLY SCALESEEDNative
Sphaeralcea
  ↳  Key to Sphaeralcea
GLOBEMALLOW
Sphaeralcea aboriginum
(Under Malacothamnus aboriginum)
Synonym
Sphaeralcea ambiguaNative
Sphaeralcea ambigua subsp. ambigua
(Under Sphaeralcea ambigua var. ambigua)
Synonym
Sphaeralcea ambigua subsp. monticola
(Under Sphaeralcea ambigua var. ambigua)
Synonym
Sphaeralcea ambigua subsp. rosacea
(Under Sphaeralcea ambigua var. rosacea)
Synonym
Sphaeralcea ambigua subsp. rugosa
(Under Sphaeralcea ambigua var. rugosa)
Synonym
Sphaeralcea ambigua var. aculeata
(Under Sphaeralcea ambigua var. ambigua)
Synonym
Sphaeralcea ambigua var. ambiguaAPRICOT MALLOWNative
Sphaeralcea ambigua var. monticola
(Under Sphaeralcea ambigua var. ambigua)
Synonym
Sphaeralcea ambigua var. rosaceaPARISH MALLOWNative
Sphaeralcea ambigua var. rugosaROUGHLEAF APRICOT MALLOWNative
Sphaeralcea angustifoliaNARROW-LEAVED GLOBEMALLOWNative
Sphaeralcea angustifolia var. cuspidata
(Under Sphaeralcea angustifolia)
Synonym
Sphaeralcea angustifolia var. oblongifolia
(Under Sphaeralcea angustifolia)
Synonym
Sphaeralcea arcuata
(Under Malacothamnus arcuatus var. arcuatus)
Synonym
Sphaeralcea coulteriCOULTER'S GLOBEMALLOWNative
Sphaeralcea davidsonii
(Under Malacothamnus davidsonii)
Synonym
Sphaeralcea densiflora
(Under Malacothamnus densiflorus var. densiflorus)
Synonym
Sphaeralcea densiflora var. gabrielensis
(Under Malacothamnus marrubioides)
Synonym
Sphaeralcea emoryi var. arida
(Under Sphaeralcea emoryi var. emoryi)
Synonym
Sphaeralcea emoryi var. emoryiEMORY'S GLOBEMALLOWNative
Sphaeralcea emoryi var. nevadensis
(Under Sphaeralcea angustifolia)
Synonym
Sphaeralcea emoryi var. variabilis
(Under Sphaeralcea emoryi var. emoryi)
Synonym
Sphaeralcea fasciculata
(Under Malacothamnus fasciculatus var. fasciculatus)
Synonym
Sphaeralcea fasciculata var. elmeri
(Under Malacothamnus arcuatus var. elmeri)
Synonym
Sphaeralcea fasciculata var. laxiflora
(Under Malacothamnus fasciculatus var. laxiflorus)
Synonym
Sphaeralcea fasciculata var. nesiotica
(Under Malacothamnus fasciculatus var. nesioticus)
Synonym
Sphaeralcea fasciculata var. nuttallii
(Under Malacothamnus nuttallii)
Synonym
Sphaeralcea fremontii
(Under Malacothamnus fremontii var. fremontii)
Synonym
Sphaeralcea fremontii var. cercophora
(Under Malacothamnus fremontii var. fremontii)
Synonym
Sphaeralcea fremontii var. exfibulosa
(Under Malacothamnus fremontii var. exfibulosus)
Synonym
Sphaeralcea grossulariifoliaGOOSEBERRY-LEAVED GLOBEMALLOWNative
Sphaeralcea grossulariifolia var. grossulariifolia
(Under Sphaeralcea grossulariifolia)
Synonym
Sphaeralcea munroanaMUNRO'S DESERT-MALLOWNative
Sphaeralcea nesiotica
(Under Malacothamnus fasciculatus var. nesioticus)
Synonym
Sphaeralcea orbiculata
(Under Malacothamnus orbiculatus)
Synonym
Sphaeralcea orbiculata subsp. clementina
(Under Malacothamnus clementinus)
Synonym
Sphaeralcea orbiculata var. clementina
(Under Malacothamnus clementinus)
Synonym
Sphaeralcea orcuttiiCARRIZO MALLOWNative
Sphaeralcea rusbyi subsp. eremicola
(Under Sphaeralcea rusbyi var. eremicola)
Synonym
Sphaeralcea rusbyi var. eremicolaRUSBY'S DESERT-MALLOWNative
Sphaeromeria
  ↳  Key to Sphaeromeria
Sphaeromeria canaGRAY CHICKENSAGENative
Sphaeromeria potentilloidesFIVEFINGER CHICKENSAGENative
Sphaeromeria potentilloides var. nitrophilaALKALI TANSY-SAGENative
Sphaeromeria potentilloides var. potentilloidesNative
Sphaerophysa
Sphaerophysa salsulaAUSTRIAN PEAWEEDExtirpated alien
SphaeropterisAUSTRALIAN TREE FERN
Sphaeropteris cooperiCOOPER'S TREE FERNNaturalized
SphenopholisWEDGE GRASS
Sphenopholis obtusataPRAIRIE WEDGE GRASSNative
Sphenosciadium capitellatum
(Under Angelica capitellata)
Synonym
Spiraea
  ↳  Key to Spiraea
Spiraea densiflora
(Under Spiraea splendens)
Synonym
Spiraea densiflora subsp. splendens
(Under Spiraea splendens)
Synonym
Spiraea douglasiiNative
Spiraea helleri
(Under Spiraea splendens)
Synonym
Spiraea splendensNative
Spiraea splendens var. splendens
(Under Spiraea splendens)
Synonym
Spiranthes
  ↳  Key to Spiranthes
LADIES' TRESSES
Spiranthes ×sierraeSIERRA LADIES' TRESSESNative
Spiranthes ×stellataSTARRY LADIES' TRESSESNative
Spiranthes perexilisSLENDER STARRY LADIES' TRESSESNative
Spiranthes porrifoliaWESTERN LADIES' TRESSES, LEEK-LEAVED LADIES' TRESSESNative
Spiranthes romanzoffianaHOODED LADIES' TRESSESNative
SpirodelaDUCKMEAT
Spirodela oligorrhiza
(Under Landoltia punctata)
Synonym
Spirodela polyrhizaNative
Spirodela punctata
(Under Landoltia punctata)
Synonym
Sporobolus
  ↳  Key to Sporobolus
DROPSEED, SACATON
Sporobolus airoidesALKALI SACATONNative
Sporobolus airoides var. wrightii
(Under Sporobolus wrightii)
Synonym
Sporobolus contractusSPIKE DROPSEEDNative
Sporobolus creber
(Under Sporobolus indicus)
Synonym
Sporobolus cryptandrusSAND DROPSEEDNative
Sporobolus cryptandrus var. strictus
(Under Sporobolus contractus)
Synonym
Sporobolus flexuosusMESA DROPSEEDNative
Sporobolus indicusSMUT GRASSNaturalized
Sporobolus indicus var. creber
(Under Sporobolus indicus)
Synonym
Sporobolus nealleyi
(Under Sporobolus cryptandrus)
Misapplied name
Sporobolus poiretii
(Under Sporobolus indicus)
Misapplied name
Sporobolus vaginiflorusPOVERTY DROPSEEDNaturalized
Sporobolus wrightiiBIG SACATONNative
Stachys
  ↳  Key to Stachys
HEDGE-NETTLE
Stachys ajugoidesNative
Stachys ajugoides var. cymosa
(Under Stachys pycnantha)
Synonym
Stachys ajugoides var. quercetorum
(Under Stachys rigida var. quercetorum)
Synonym
Stachys ajugoides var. rigida
(Under Stachys bergii)
Synonym, in part
Stachys ajugoides var. rigida
(Under Stachys mexicana)
Synonym, in part
Stachys ajugoides var. rigida
(Under Stachys rigida var. quercetorum)
Synonym, in part
Stachys ajugoides var. rigida
(Under Stachys rigida var. rigida)
Synonym
Stachys ajugoides var. stricta
(Under Stachys stricta)
Synonym
Stachys albensNative
Stachys albens var. juliensis
(Under Stachys albens)
Synonym
Stachys bergiiNative
Stachys bullataNative
Stachys californica
(Under Stachys bullata)
Synonym
Stachys chamissonisNative
Stachys flaccida
(Under Stachys chamissonis)
Synonym
Stachys gracilenta
(Under Stachys rigida var. quercetorum)
Synonym
Stachys lanuginosa
(Under Stachys albens)
Synonym
Stachys malacophylla
(Under Stachys albens)
Synonym
Stachys mexicanaNative
Stachys palustris subsp. pilosa
(Under Stachys pilosa)
Synonym
Stachys pilosaPRAIRIE WOUNDWORTNative
Stachys pycnanthaSHORT-SPIKED HEDGE NETTLENative
Stachys quercetorum
(Under Stachys rigida var. quercetorum)
Synonym
Stachys ramosa
(Under Stachys ajugoides)
Synonym
Stachys rigidaNative
Stachys rigida subsp. lanata
(Under Stachys bergii)
Synonym
Stachys rigida subsp. quercetorum
(Under Stachys rigida var. quercetorum)
Synonym
Stachys rigida subsp. rivularis
(Under Stachys rigida var. rigida)
Synonym
Stachys rigida var. quercetorumNative
Stachys rigida var. rigidaNative
Stachys stebbinsiiNative
Stachys strictaNative
Stachys velutina
(Under Stachys albens)
Synonym
Stachys veronicifolia
(Under Stachys rigida var. rigida)
Synonym
Stachys viarum
(Under Stachys rigida var. quercetorum)
Synonym
Stanfordia californica
(Under Caulanthus californicus)
Synonym
Stanleya
  ↳  Key to Stanleya
PRINCE'S PLUME
Stanleya elataNative
Stanleya pinnata subsp. inyoensis
(Under Stanleya pinnata var. pinnata)
Synonym
Stanleya pinnata var. inyoensis
(Under Stanleya pinnata var. pinnata)
Synonym
Stanleya pinnata var. pinnataNative
Stanleya viridifloraGREEN-FLOWERED PRINCE'S PLUMENative
StaphyleaBLADDERNUT
Staphylea bolanderiSIERRA BLADDERNUTNative
StaphyleaceaeBLADDERNUT FAMILY
Statice perezii
(Under Limonium perezii)
Synonym
Stebbinsoseris
  ↳  Key to Stebbinsoseris
Stebbinsoseris decipiensSANTA CRUZ MICROSERISNative
Stebbinsoseris heterocarpaGRASSLAND SILVERPUFFSNative
Stellaria
  ↳  Key to Stellaria
CHICKWEED, STARWORT
Stellaria biflora
(Under Cherleria biflora)
Synonym
Stellaria borealis subsp. sitchanaSITKA STARWORTNative
Stellaria borealis var. bongardiana
(Under Stellaria borealis subsp. sitchana)
Synonym
Stellaria calycanthaNORTHERN STARWORTNative
Stellaria calycantha subsp. interior
(Under Stellaria calycantha)
Synonym
Stellaria calycantha var. bongardiana
(Under Stellaria borealis subsp. sitchana)
Synonym
Stellaria calycantha var. simcoei
(Under Stellaria calycantha)
Synonym
Stellaria calycantha var. sitchana
(Under Stellaria borealis subsp. sitchana)
Synonym
Stellaria crispaCRISP STARWORTNative
Stellaria gramineaCOMMON STARWORTNaturalized
Stellaria jamesiana
(Under Torreyostellaria jamesiana)
Synonym
Stellaria lagunensis
(Under Arenaria lanuginosa var. saxosa)
Synonym
Stellaria littoralisBEACH STARWORTNative
Stellaria longifoliaLONG-LEAVED STARWORTNative
Stellaria longipes subsp. longipesGOLDIE'S STARWORTNative
Stellaria longipes var. laeta
(Under Stellaria longipes subsp. longipes)
Synonym
Stellaria longipes var. longipes
(Under Stellaria longipes subsp. longipes)
Synonym
Stellaria mediaCOMMON CHICKWEEDNaturalized
Stellaria media subsp. neglecta
(Under Stellaria neglecta)
Synonym
Stellaria media subsp. pallida
(Under Stellaria pallida)
Synonym
Stellaria neglectaGREATER CHICKWEEDNaturalized
Stellaria nitensSHINING CHICKWEEDNative
Stellaria obtusa
(Under Engellaria obtusa)
Synonym
Stellaria pallidaLESSER CHICKWEEDNaturalized
Stellaria sitchana var. bongardiana
(Under Stellaria borealis subsp. sitchana)
Synonym
Stellaria umbellataUMBELLATE STARWORTNative
Stemodia
Stemodia durantifoliaPURPLE STEMODIANative
Stenanthium
Stenanthium occidentaleNative
Stenophyllus capillaris
(Under Bulbostylis capillaris)
Synonym
Stenotaphrum
Stenotaphrum secundatumSAINT AUGUSTINE GRASSNaturalized
Stenotus
  ↳  Key to Stenotus
Stenotus acaulisSTEMLESS GOLDENWEEDNative
Stenotus lanuginosus var. lanuginosusWOOLLY STENOTUSNative
Stenotus stenophyllus
(Under Nestotus stenophyllus)
Synonym
Stephanomeria
  ↳  Key to Stephanomeria
Stephanomeria blairii
(Under Munzothamnus blairii)
Synonym
Stephanomeria cichoriaceaSILVER ROCK-LETTUCE, CHICORYLEAF WIRE-LETTUCENative
Stephanomeria diegensisNative
Stephanomeria elataNative
Stephanomeria exiguaNative
Stephanomeria exigua subsp. carotiferaNative
Stephanomeria exigua subsp. coronariaNative
Stephanomeria exigua subsp. deaneiNative
Stephanomeria exigua subsp. exiguaNative
Stephanomeria exigua subsp. macrocarpaNative
Stephanomeria lactucinaNative
Stephanomeria minor
(Under Stephanomeria tenuifolia)
Synonym
Stephanomeria minor var. minor
(Under Stephanomeria tenuifolia)
Synonym
Stephanomeria minor var. myrioclada
(Under Stephanomeria tenuifolia)
Synonym
Stephanomeria paniculataNative
Stephanomeria parryiNative
Stephanomeria paucifloraWIRE-LETTUCENative
Stephanomeria pauciflora var. parishii
(Under Stephanomeria pauciflora)
Synonym
Stephanomeria pauciflora var. pauciflora
(Under Stephanomeria pauciflora)
Synonym
Stephanomeria runcinata var. parishii
(Under Stephanomeria pauciflora)
Synonym
Stephanomeria spinosa
(Under Pleiacanthus spinosus)
Synonym
Stephanomeria tenuifoliaNARROW-LEAVED WIRE-LETTUCENative
Stephanomeria tenuifolia var. myrioclada
(Under Stephanomeria tenuifolia)
Synonym
Stephanomeria tomentosa
(Under Stephanomeria virgata subsp. virgata)
Synonym
Stephanomeria virgataNative
Stephanomeria virgata subsp. pleurocarpaNative
Stephanomeria virgata subsp. virgataNative
Stillingia
  ↳  Key to Stillingia
Stillingia linearifoliaNative
Stillingia paucidentataNative
Stillingia spinulosaNative
Stipa
  ↳  Key to Stipa
NEEDLE GRASS
Stipa aridaMORMON NEEDLE GRASSNative
Stipa brachychaetaPUNA NEEDLE GRASSNaturalized
Stipa capensisCAPE RICE GRASSNaturalized
Stipa cernuaNODDING NEEDLE GRASSNative
Stipa chaetophoraSTIPOID RICE GRASSNaturalized
Stipa columbiana
(Under Stipa nelsonii var. dorei)
Synonym
Stipa comataNEEDLE-AND-THREADNative
Stipa comata var. comataNative
Stipa comata var. intermediaNative
Stipa coronataCRESTED NEEDLE GRASSNative
Stipa diegoensisSAN DIEGO NEEDLE GRASSNative
Stipa divaricataSMALL-FLOWERED RICE GRASSNative
Stipa exiguaLITTLE RICE GRASSNative
Stipa formicarum
(Under Stipa manicata)
Misapplied name
Stipa hymenoidesSAND RICE GRASSNative
Stipa kingiiKING'S RICE GRASSNative
Stipa latiglumisWIDE-GLUMED NEEDLE GRASSNative
Stipa lemmoniiLEMMON'S NEEDLE GRASSNative
Stipa lemmonii var. lemmoniiNative
Stipa lemmonii var. pubescensNative
Stipa lepidaFOOTHILL NEEDLE GRASSNative
Stipa lettermaniiLETTERMAN'S NEEDLE GRASSNative
Stipa manicataANDEAN TUSSOCK GRASSNaturalized
Stipa mauritanicaMAURITANIAN GRASSNaturalized
Stipa miliacea var. miliaceaSMILO GRASSNaturalized
Stipa nelsonii var. doreiMOUNTAIN NEEDLE GRASSNative
Stipa nevadensisNEVADA NEEDLE GRASSNative
Stipa occidentalisNative
Stipa occidentalis var. californicaCALIFORNIA NEEDLE GRASSNative
Stipa occidentalis var. occidentalisWESTERN NEEDLE GRASSNative
Stipa occidentalis var. pubescensCOMMON WESTERN NEEDLE GRASSNative
Stipa parishii var. parishiiNative
Stipa pinetorumPINEWOODS NEEDLE GRASSNative
Stipa pulchraPURPLE NEEDLE GRASSNative
Stipa purpurataBRISTLY NEEDLE GRASSNaturalized
Stipa speciosaDESERT NEEDLE GRASSNative
Stipa stillmaniiSTILLMAN'S NEEDLE GRASSNative
Stipa thurberianaTHURBER'S NEEDLE GRASSNative
Stipa webberiWEBBER'S NEEDLE GRASSNative
Streptanthella
Streptanthella longirostrisNative
Streptanthella longirostris var. derelicta
(Under Streptanthella longirostris)
Synonym
Streptanthus
  ↳  Key to Streptanthus
JEWELFLOWER
Streptanthus albidus subsp. albidus
(Under Streptanthus glandulosus subsp. albidus)
Synonym
Streptanthus albidus subsp. peramoenus
(Under Streptanthus glandulosus subsp. glandulosus)
Synonym
Streptanthus anceps
(Under Caulanthus anceps)
Synonym
Streptanthus anomalusMOUNT BURDELL JEWELFLOWERNative
Streptanthus barbatusPACIFIC JEWELFLOWERNative
Streptanthus barbigerBEARDED JEWELFLOWERNative
Streptanthus batrachopusTAMALPAIS JEWELFLOWERNative
Streptanthus bernardinusLAGUNA MOUNTAINS JEWELFLOWERNative
Streptanthus brachiatusSOCRATES MINE JEWELFLOWERNative
Streptanthus brachiatus subsp. brachiatus
(Under Streptanthus brachiatus)
Synonym
Streptanthus brachiatus subsp. hoffmanii
(Under Streptanthus brachiatus)
Synonym
Streptanthus breweriBREWER'S JEWELFLOWERNative
Streptanthus breweri var. breweri
(Under Streptanthus breweri)
Synonym
Streptanthus breweri var. hesperidis
(Under Streptanthus hesperidis)
Synonym
Streptanthus callistusMOUNT HAMILTON JEWELFLOWERNative
Streptanthus campestrisSOUTHERN JEWELFLOWERNative
Streptanthus cordatusHEARTLEAF JEWELFLOWERNative
Streptanthus cordatus var. cordatusNative
Streptanthus cordatus var. duranii
(Under Streptanthus cordatus var. cordatus)
Synonym
Streptanthus cordatus var. exiguus
(Under Streptanthus oliganthus)
Synonym
Streptanthus cordatus var. piutensisPIUTE MOUNTAINS JEWELFLOWERNative
Streptanthus coulteri var. lemmonii
(Under Caulanthus lemmonii)
Synonym
Streptanthus diversifoliusVARIED-LEAVED JEWELFLOWERNative
Streptanthus drepanoidesSICKLE-FRUIT JEWELFLOWERNative
Streptanthus farnsworthianusFARNSWORTH'S JEWELFLOWERNative
Streptanthus fenestratusTEHIPITE VALLEY JEWELFLOWERNative
Streptanthus flavescens
(Under Caulanthus flavescens)
Synonym
Streptanthus glandulosusBRISTLY JEWELFLOWERNative
Streptanthus glandulosus subsp. albidusMETCALF CANYON JEWELFLOWERNative
Streptanthus glandulosus subsp. arkiiKRUCKEBERG'S BRISTLY JEWELFLOWERNative
Streptanthus glandulosus subsp. glandulosusNative
Streptanthus glandulosus subsp. hoffmaniiHOFFMAN'S BRISTLY JEWELFLOWERNative
Streptanthus glandulosus subsp. josephinensisJOSEPHINE COUNTY JEWELFLOWERNative
Streptanthus glandulosus subsp. nigerTIBURON JEWELFLOWERNative
Streptanthus glandulosus subsp. pulchellusMOUNT TAMALPAIS BRISTLY JEWELFLOWERNative
Streptanthus glandulosus subsp. raicheiRAICHE'S JEWELFLOWERNative
Streptanthus glandulosus subsp. secundusONE-SIDED JEWELFLOWERNative
Streptanthus glandulosus subsp. sonomensisUNCOMMON JEWELFLOWERNative
Streptanthus glandulosus var. albidus
(Under Streptanthus glandulosus subsp. albidus)
Synonym
Streptanthus glandulosus var. hoffmanii
(Under Streptanthus glandulosus subsp. hoffmanii)
Synonym
Streptanthus glandulosus var. niger
(Under Streptanthus glandulosus subsp. niger)
Synonym
Streptanthus glandulosus var. pulchellus
(Under Streptanthus glandulosus subsp. pulchellus)
Synonym
Streptanthus glandulosus var. sonomensis
(Under Streptanthus glandulosus subsp. sonomensis)
Synonym
Streptanthus glaucus
(Under Caulanthus glaucus)
Synonym
Streptanthus gracilisALPINE JEWELFLOWERNative
Streptanthus hallii
(Under Caulanthus hallii)
Synonym
Streptanthus hesperidisGREEN JEWELFLOWERNative
Streptanthus heterophyllus
(Under Caulanthus heterophyllus)
Synonym
Streptanthus hispidusMOUNT DIABLO JEWELFLOWERNative
Streptanthus howelliiHOWELL'S JEWELFLOWERNative
Streptanthus inflatus
(Under Caulanthus inflatus)
Synonym
Streptanthus insignisSAN BENITO JEWELFLOWERNative
Streptanthus insignis subsp. insignisNative
Streptanthus insignis subsp. lyoniiARBURUA RANCH JEWELFLOWERNative
Streptanthus juneaeJUNE'S JEWELFLOWERNative
Streptanthus lemmonii
(Under Caulanthus lemmonii)
Synonym
Streptanthus lemmonii
(Under Streptanthus tortuosus)
Synonym
Streptanthus longisiliquusLONG-FRUIT JEWELFLOWERNative
Streptanthus major
(Under Caulanthus major)
Synonym
Streptanthus medeirosiiTEJON JEWELFLOWERNative
Streptanthus morrisoniiMORRISON'S JEWELFLOWERNative
Streptanthus morrisonii subsp. elatus
(Under Streptanthus morrisonii)
Synonym
Streptanthus morrisonii subsp. hirtiflorus
(Under Streptanthus morrisonii)
Synonym
Streptanthus morrisonii subsp. kruckebergii
(Under Streptanthus morrisonii)
Synonym
Streptanthus morrisonii subsp. morrisonii
(Under Streptanthus morrisonii)
Synonym
Streptanthus niger
(Under Streptanthus glandulosus subsp. niger)
Synonym
Streptanthus oblanceolatusTRINITY RIVER JEWELFLOWERNative
Streptanthus oliganthusMASONIC MOUNTAIN JEWELFLOWERNative
Streptanthus pilosus
(Under Caulanthus pilosus)
Synonym
Streptanthus polygaloidesMILKWORT JEWELFLOWERNative
Streptanthus polygaloides subsp. alternansTUOLUMNE JEWELFLOWERNative
Streptanthus polygaloides subsp. aureusGOLDEN JEWELFLOWERNative
Streptanthus polygaloides subsp. bicolorRED HILLS JEWELFLOWERNative
Streptanthus polygaloides subsp. liberNative
Streptanthus polygaloides subsp. polygaloidesNative
Streptanthus polygaloides subsp. purpureusPURPLE MILKWORT JEWELFLOWERNative
Streptanthus polygaloides subsp. undulatusPINE FLAT JEWELFLOWERNative
Streptanthus sanhedrensis
(Under Streptanthus tortuosus var. tortuosus)
Synonym
Streptanthus simulans
(Under Caulanthus simulans)
Synonym
Streptanthus tortuosusMOUNTAIN JEWELFLOWERNative
Streptanthus tortuosus subsp. trueiTRUE'S MOUNTAIN JEWELFLOWERNative
Streptanthus tortuosus var. flavescens
(Under Streptanthus tortuosus var. orbiculatus)
Synonym
Streptanthus tortuosus var. foliosusWAWONA JEWELFLOWERNative
Streptanthus tortuosus var. oblongusKLAMATH MOUNTAINS JEWELFLOWERNative
Streptanthus tortuosus var. optatusSIERRAN FOOTHILL JEWELFLOWERNative
Streptanthus tortuosus var. orbiculatusHIGH MOUNTAIN JEWELFLOWERNative
Streptanthus tortuosus var. pallidusPALLID JEWELFLOWERNative
Streptanthus tortuosus var. suffrutescens
(Under Streptanthus tortuosus var. tortuosus)
Synonym
Streptanthus tortuosus var. tortuosusMOUNTAIN JEWELFLOWERNative
Streptanthus vernalisEARLY JEWELFLOWERNative
Streptanthus vimineusSLENDER JEWELFLOWERNative
Streptopus
Streptopus amplexifolius var. americanusNative
Streptopus amplexifolius var. denticulatus
(Under Streptopus amplexifolius var. americanus)
Synonym
Strigosella
Strigosella africanaNaturalized
Strombocarpa
  ↳  Key to Strombocarpa
Strombocarpa pubescensSCREWBEAN MESQUITENative
Strombocarpa strombuliferaARGENTINE SCREWBEANWaif
Stropholirion californicum
(Under Dichelostemma volubile)
Synonym
Struthiopteris
Struthiopteris spicantDEER FERNNative
Stuckenia
  ↳  Key to Stuckenia
PONDWEED
Stuckenia filiformis subsp. alpinaSLENDER-LEAVED PONDWEEDNative
Stuckenia pectinataFENNEL-LEAF PONDWEEDNative
Stuckenia striataNEVADA PONDWEEDNative
Stutzia
Stutzia covilleiCOVILLE'S ORACHNative
Stylocline
  ↳  Key to Stylocline
NESTSTRAW
Stylocline amphibola
(Under Micropus amphibolus)
Synonym
Stylocline citroleumOIL NESTSTRAWNative
Stylocline filaginea
(Under Ancistrocarphus filagineus)
Synonym
Stylocline filaginea var. depressa
(Under Ancistrocarphus filagineus)
Synonym
Stylocline gnaphalioides
(Under Stylocline gnaphaloides)
Orthographic variant
Stylocline gnaphaloidesEVERLASTING NESTSTRAWNative
Stylocline intertextaMOJAVE NESTSTRAWNative
Stylocline masoniiMASON'S NESTSTRAWNative
Stylocline micropoidesDESERT NESTSTRAW, WOOLLYHEAD FANBRACTNative
Stylocline psilocarphoidesPECK NESTSTRAWNative
Stylocline sonorensisMESQUITE NESTSTRAWNative
Stylomecon heterophylla
(Under Papaver heterophyllum)
Synonym
StyracaceaeSTORAX FAMILY
StyraxSNOWDROP BUSH
Styrax officinalis var. californicus
(Under Styrax redivivus)
Synonym
Styrax officinalis var. fulvescens
(Under Styrax redivivus)
Synonym
Styrax officinalis var. redivivus
(Under Styrax redivivus)
Synonym
Styrax redivivusNative
Suaeda
  ↳  Key to Suaeda
SEABLITE, SEEPWEED
Suaeda calceoliformisHORNED SEABLITENative
Suaeda californicaCALIFORNIA SEABLITENative
Suaeda californica var. pubescens
(Under Suaeda taxifolia)
Synonym
Suaeda californica var. taxifolia
(Under Suaeda taxifolia)
Synonym
Suaeda depressa var. depressa
(Under Suaeda calceoliformis)
Unabridged misapplied name
Suaeda depressa var. erecta
(Under Suaeda calceoliformis)
Synonym
Suaeda esteroaESTUARY SEABLITENative
Suaeda fruticosa
(Under Suaeda nigra)
Unabridged misapplied name
Suaeda moquinii
(Under Suaeda nigra)
Synonym
Suaeda nigraBUSH SEEPWEEDNative
Suaeda occidentalisWESTERN SEABLITENative
Suaeda taxifoliaWOOLLY SEABLITENative
Suaeda torreyana var. ramosissima
(Under Suaeda nigra)
Synonym
Suaeda torreyana var. torreyana
(Under Suaeda nigra)
Synonym
SubulariaAWLWORT
Subularia aquatica subsp. americanaWATER AWLWORTNative
Subularia aquatica var. americana
(Under Subularia aquatica subsp. americana)
Synonym
Suksdorfia ranunculifolia
(Under Hemieva ranunculifolia)
Synonym
Swallenia
Swallenia alexandraeEUREKA VALLEY DUNE GRASSNative
Swertia
Swertia albicaulis
(Under Frasera albicaulis)
Synonym
Swertia albicaulis var. albicaulis
(Under Frasera albicaulis var. modocensis)
Synonym, in part
Swertia albicaulis var. nitida
(Under Frasera albicaulis var. nitida)
Synonym
Swertia albomarginata
(Under Frasera albomarginata)
Synonym
Swertia covillei
(Under Swertia perennis)
Synonym
Swertia lassenica
(Under Frasera albicaulis var. nitida)
Synonym
Swertia modocensis
(Under Frasera albicaulis var. modocensis)
Synonym
Swertia neglecta
(Under Frasera neglecta)
Synonym
Swertia parryi
(Under Frasera parryi)
Synonym
Swertia perennisSTAR SWERTIANative
Swertia puberulenta
(Under Frasera puberulenta)
Synonym
Swertia radiata
(Under Frasera speciosa)
Synonym
Swertia radiata var. radiata
(Under Frasera speciosa)
Synonym
Swertia shastaensis
(Under Frasera albicaulis var. modocensis)
Synonym
Swertia tubulosa
(Under Frasera tubulosa)
Synonym
Swertia umpquaensis
(Under Frasera umpquaensis)
Synonym
Syagrus
Syagrus romanzoffianaQUEEN PALMWaif
Sympetaleia rupestris
(Under Eucnide rupestris)
Synonym
Symphoricarpos
  ↳  Key to Symphoricarpos
WAXBERRY, SNOWBERRY
Symphoricarpos acutus
(Under Symphoricarpos mollis)
Synonym
Symphoricarpos albus var. laevigatusSNOWBERRYNative
Symphoricarpos hesperius
(Under Symphoricarpos mollis)
Synonym
Symphoricarpos longiflorusFRAGRANT SNOWBERRYNative
Symphoricarpos mollisCREEPING SNOWBERRY, TRIP VINENative
Symphoricarpos parishii
(Under Symphoricarpos rotundifolius var. parishii)
Synonym
Symphoricarpos rivularis
(Under Symphoricarpos albus var. laevigatus)
Synonym
Symphoricarpos rotundifoliusNative
Symphoricarpos rotundifolius var. parishiiNative
Symphoricarpos rotundifolius var. rotundifoliusNative
Symphyotrichum
  ↳  Key to Symphyotrichum
AMERICAN-ASTER
Symphyotrichum ascendensNative
Symphyotrichum bracteolatumNative
Symphyotrichum campestreNative
Symphyotrichum campestre var. bloomeri
(Under Symphyotrichum campestre)
Synonym
Symphyotrichum campestre var. campestre
(Under Symphyotrichum campestre)
Synonym
Symphyotrichum chilenseNative
Symphyotrichum chilense var. chilense
(Under Symphyotrichum chilense)
Synonym
Symphyotrichum chilense var. invenustum
(Under Symphyotrichum chilense)
Synonym
Symphyotrichum chilense var. medium
(Under Symphyotrichum chilense)
Synonym
Symphyotrichum defoliatumSAN BERNARDINO ASTERNative
Symphyotrichum eatonii
(Under Symphyotrichum bracteolatum)
Synonym
Symphyotrichum expansum
(Under Symphyotrichum subulatum var. parviflorum)
Synonym
Symphyotrichum foliaceumNative
Symphyotrichum foliaceum var. apricumNative
Symphyotrichum foliaceum var. parryiNative
Symphyotrichum frondosumNative
Symphyotrichum greataeGREATA'S ASTERNative
Symphyotrichum hendersoniiHENDERSON'S ASTERNative
Symphyotrichum lanceolatum subsp. hesperium
(Under Symphyotrichum lanceolatum var. hesperium)
Synonym
Symphyotrichum lanceolatum var. hesperiumNative
Symphyotrichum lentumSUISUN MARSH ASTERNative
Symphyotrichum spathulatumNative
Symphyotrichum spathulatum var. intermediumNative
Symphyotrichum spathulatum var. spathulatumNative
Symphyotrichum spathulatum var. yosemitanumWESTERN BOG ASTERNative
Symphyotrichum subspicatumDOUGLAS ASTERNative
Symphyotrichum subulatumANNUAL SALTMARSH ASTERNative
Symphyotrichum subulatum var. elongatumNaturalized
Symphyotrichum subulatum var. parviflorumNative
Symphyotrichum subulatum var. squamatumNaturalized
Symphytum
  ↳  Key to Symphytum
COMFREY
Symphytum ×uplandicumRUSSIAN COMFREYNaturalized
Symphytum asperum
(Under Symphytum ×uplandicum)
Misapplied name
Symphytum officinaleCOMFREYWaif
Synthyris
  ↳  Key to Synthyris
Synthyris cordataSERPENTINE SNOW QUEENNative
Synthyris major
(Under Synthyris missurica subsp. missurica)
Synonym
Synthyris missurica subsp. missuricaKITTENTAILNative
Synthyris reniformisSNOW QUEENNative
Synthyris reniformis var. cordata
(Under Synthyris cordata)
Synonym
Synthyris reniformis var. reniformis
(Under Synthyris reniformis)
Synonym
Synthyris stellata
(Under Synthyris missurica subsp. missurica)
Synonym
Syntrichopappus
  ↳  Key to Syntrichopappus
Syntrichopappus fremontiiNative
Syntrichopappus lemmoniiLEMMON'S SYNTRICHOPAPPUSNative
Systenotheca
Systenotheca vortriedeiVORTRIEDE'S SPINEFLOWERNative
Syzygium
Syzygium australeSCRUB CHERRYWaif
Taeniatherum asperum
(Under Elymus caput-medusae)
Synonym
Taeniatherum caput-medusae
(Under Elymus caput-medusae)
Synonym
Tagetes
  ↳  Key to Tagetes
MARIGOLD
Tagetes erectaAFRICAN or FRENCH MARIGOLDWaif
Tagetes minutaWILD MARIGOLDNaturalized
Tagetes patula
(Under Tagetes erecta)
Synonym
Talinum pygmaeum
(Under Lewisia pygmaea)
Synonym
TamaricaceaeTAMARISK FAMILY
Tamarix
  ↳  Key to Tamarix
TAMARISK, SALTCEDAR
Tamarix aphyllaATHELNaturalized
Tamarix chinensisFIVESTAMEN TAMARISKNaturalized
Tamarix gallicaFRENCH TAMARISKNaturalized
Tamarix parvifloraSMALLFLOWER TAMARISKNaturalized
Tamarix pentandra
(Under Tamarix ramosissima)
Synonym
Tamarix ramosissimaSALTCEDARNaturalized
Tanacetum
  ↳  Key to Tanacetum
TANSY
Tanacetum bipinnatumDUNE TANSYNative
Tanacetum camphoratum
(Under Tanacetum bipinnatum)
Synonym
Tanacetum canum
(Under Sphaeromeria cana)
Synonym
Tanacetum partheniumFEVERFEWNaturalized
Tanacetum vulgareCOMMON TANSYNaturalized
Taraxacum
  ↳  Key to Taraxacum
DANDELION
Taraxacum californicumCALIFORNIA DANDELIONNative
Taraxacum ceratophorumHORNED DANDELIONNative
Taraxacum ceratophorum var. bernardinum
(Under Taraxacum californicum)
Synonym
Taraxacum erythrospermumRED-SEEDED DANDELIONNaturalized
Taraxacum laevigatum
(Under Taraxacum erythrospermum)
Unabridged misapplied name
Taraxacum laevigatum
(Under Taraxacum officinale)
Synonym
Taraxacum laevigatum var. erythrospermum
(Under Taraxacum erythrospermum)
Synonym
Taraxacum officinaleCOMMON DANDELIONNaturalized
Taraxacum officinale subsp. ceratophorum
(Under Taraxacum ceratophorum)
Synonym
Taraxacum officinale var. erythrospermum
(Under Taraxacum erythrospermum)
Synonym
Taraxia
  ↳  Key to Taraxia
Taraxia ovataNative
Taraxia subacaulisNative
Taraxia tanacetifoliaNative
Tauschia
  ↳  Key to Tauschia
Tauschia argutaNative
Tauschia glaucaGLAUCOUS TAUSCHIANative
Tauschia hartwegiiNative
Tauschia howelliiHOWELL'S TAUSCHIANative
Tauschia kelloggiiNative
Tauschia parishiiNative
Taxaceae
  ↳  Key to Taxaceae
YEW FAMILY
TaxusYEW
Taxus brevifoliaPACIFIC YEWNative
Taxus brevifolia var. brevifolia
(Under Taxus brevifolia)
Synonym
Taxus brevifolia var. polychaeta
(Under Taxus brevifolia)
Synonym
Taxus brevifolia var. reptaneta
(Under Taxus brevifolia)
Synonym
TecophilaeaceaeTECOPHILAEA FAMILY
Teesdalia
  ↳  Key to Teesdalia
Teesdalia coronopifoliaWaif
Teesdalia nudicaulisNaturalized
TellimaFRINGE CUPS
Tellima grandifloraNative
Tetracoccus
  ↳  Key to Tetracoccus
Tetracoccus dioicusPARRY'S TETRACOCCUSNative
Tetracoccus halliiHALL'S TETRACOCCUSNative
Tetracoccus ilicifoliusHOLLY-LEAVED TETRACOCCUSNative
Tetradymia
  ↳  Key to Tetradymia
COTTONTHORN, HORSEBRUSH
Tetradymia argyraeaSTRIPED HORSEBRUSHNative
Tetradymia axillarisNative
Tetradymia axillaris var. axillarisNative
Tetradymia axillaris var. longispinaNative
Tetradymia canescensNative
Tetradymia comosaNative
Tetradymia glabrataNative
Tetradymia spinosaNative
Tetradymia stenolepisNative
Tetradymia tetrameresDUNE HORSEBRUSHNative
Tetragonia
Tetragonia expansa
(Under Tetragonia tetragonoides)
Synonym
Tetragonia tetragonoidesNEW ZEALAND SPINACHNaturalized
Tetraneuris
Tetraneuris acaulis var. arizonicaNative
Tetraneuris acaulis var. nana
(Under Tetraneuris acaulis var. arizonica)
Synonym
Tetrapteron
  ↳  Key to Tetrapteron
Tetrapteron graciliflorumHILL SUN CUPNative
Tetrapteron palmeriNative
Teucrium
  ↳  Key to Teucrium
Teucrium cubense subsp. depressumDWARF GERMANDERNative
Teucrium cubense var. densum
(Under Teucrium cubense subsp. depressum)
Synonym
Teucrium glandulosumDESERT GERMANDERNative
Teutliopsis patula
(Under Atriplex patula)
Synonym
Thalictrum
  ↳  Key to Thalictrum
MEADOW-RUE
Thalictrum alpinumARCTIC MEADOW-RUENative
Thalictrum fendleriNative
Thalictrum fendleri var. fendleriNative
Thalictrum fendleri var. polycarpumNative
Thalictrum occidentaleNative
Thalictrum occidentale var. palousense
(Under Thalictrum occidentale)
Synonym
Thalictrum polycarpum
(Under Thalictrum fendleri var. polycarpum)
Synonym
Thalictrum sparsiflorumNative
ThamnosmaTURPENTINE-BROOM
Thamnosma montanaNative
Thelaia aphylla
(Under Pyrola aphylla)
Synonym
ThelespermaGREENTHREAD
Thelesperma megapotamicumRAYLESS GREENTHREADWaif
Thelypodium
  ↳  Key to Thelypodium
Thelypodium brachycarpumSHORT-PODDED THELYPODIUMNative
Thelypodium cooperi
(Under Caulanthus cooperi)
Synonym
Thelypodium crispumNative
Thelypodium flavescens
(Under Caulanthus flavescens)
Synonym
Thelypodium flexuosumNative
Thelypodium howellii subsp. howelliiHOWELL'S THELYPODIUMNative
Thelypodium integrifoliumNative
Thelypodium integrifolium subsp. affineNative
Thelypodium integrifolium subsp. complanatumFOXTAIL THELYPODIUMNative
Thelypodium jaegeri
(Under Hesperidanthus jaegeri)
Synonym
Thelypodium laciniatumNative
Thelypodium laciniatum var. milleflorum
(Under Thelypodium milleflorum)
Synonym
Thelypodium lasiophyllum
(Under Caulanthus lasiophyllus)
Synonym
Thelypodium lasiophyllum var. inalienum
(Under Caulanthus lasiophyllus)
Synonym
Thelypodium lasiophyllum var. lasiophyllum
(Under Caulanthus lasiophyllus)
Synonym
Thelypodium lasiophyllum var. rigidum
(Under Caulanthus lasiophyllus)
Synonym
Thelypodium lasiophyllum var. utahense
(Under Caulanthus lasiophyllus)
Synonym
Thelypodium lemmonii
(Under Caulanthus anceps)
Synonym
Thelypodium milleflorumMANY-FLOWERED THELYPODIUMNative
Thelypodium stenopetalumSLENDER-PETALED THELYPODIUMNative
Thelypteridaceae
  ↳  Key to Thelypteridaceae
THELYPTERIS FAMILY
Thelypteris nevadensis
(Under Amauropelta nevadensis)
Synonym
Thelypteris puberula var. sonorensis
(Under Pelazoneuron puberulum var. sonorense)
Synonym
Themidaceae
  ↳  Key to Themidaceae
BRODIAEA FAMILY
TheophrastaceaeTHEOPHRASTA FAMILY
Thermopsis
  ↳  Key to Thermopsis
GOLDEN PEA, FALSE-LUPINE
Thermopsis argentata
(Under Thermopsis californica var. argentata)
Synonym
Thermopsis californicaNative
Thermopsis californica var. argentataSILVERY FALSE-LUPINENative
Thermopsis californica var. californicaNative
Thermopsis californica var. semotaVELVETY FALSE-LUPINENative
Thermopsis gracilisNative
Thermopsis macrophyllaSANTA YNEZ FALSE-LUPINENative
Thermopsis macrophylla var. agnina
(Under Thermopsis macrophylla)
Synonym
Thermopsis macrophylla var. argentata
(Under Thermopsis californica var. argentata)
Synonym
Thermopsis macrophylla var. macrophylla
(Under Thermopsis macrophylla)
Synonym
Thermopsis macrophylla var. semota
(Under Thermopsis californica var. semota)
Synonym
Thermopsis macrophylla var. venosa
(Under Thermopsis gracilis)
Synonym
Thermopsis robustaROBUST FALSE-LUPINENative
Thinopyrum intermedium
(Under Elymus hispidus)
Synonym
Thinopyrum intermedium subsp. barbulatum
(Under Elymus hispidus)
Synonym
Thinopyrum ponticum
(Under Elymus ponticus)
Synonym
ThlaspiPENNYCRESS
Thlaspi alpestre var. californicum
(Under Noccaea fendleri subsp. californica)
Synonym
Thlaspi alpestre var. glaucum
(Under Noccaea fendleri subsp. glauca)
Synonym
Thlaspi arvenseNaturalized
Thlaspi californicum
(Under Noccaea fendleri subsp. californica)
Synonym
Thlaspi fendleri
(Under Noccaea fendleri)
Synonym
Thlaspi fendleri var. glaucum
(Under Noccaea fendleri subsp. glauca)
Synonym
Thlaspi glaucum subsp. californicum
(Under Noccaea fendleri subsp. californica)
Synonym
Thlaspi montanum var. californicum
(Under Noccaea fendleri subsp. californica)
Synonym
Thlaspi montanum var. fendleri
(Under Noccaea fendleri)
Synonym
Thlaspi montanum var. montanum
(Under Noccaea fendleri subsp. glauca)
Synonym
ThujaARBORVITAE
Thuja plicataWESTERN RED CEDAR, CANOE CEDARNative
ThymelaeaceaeDAPHNE FAMILY
Thymophylla
  ↳  Key to Thymophylla
Thymophylla pentachaeta var. belenidiumNative
Thymophylla tenuiloba var. tenuilobaWaif
Thysanocarpus
  ↳  Key to Thysanocarpus
LACEPOD, FRINGEPOD
Thysanocarpus amplectens
(Under Thysanocarpus curvipes subsp. amplectens)
Synonym
Thysanocarpus conchuliferusSANTA CRUZ ISLAND FRINGEPODNative
Thysanocarpus curvipesNative
Thysanocarpus curvipes
(Under Thysanocarpus curvipes subsp. amplectens)
Synonym, in part
Thysanocarpus curvipes
(Under Thysanocarpus curvipes subsp. curvipes)
Synonym, in part
Thysanocarpus curvipes
(Under Thysanocarpus curvipes subsp. elegans)
Synonym, in part
Thysanocarpus curvipes
(Under Thysanocarpus curvipes subsp. eradiatus)
Synonym, in part
Thysanocarpus curvipes
(Under Thysanocarpus curvipes subsp. longistylus)
Synonym, in part
Thysanocarpus curvipes subsp. amplectensNative
Thysanocarpus curvipes subsp. curvipesNative
Thysanocarpus curvipes subsp. elegansNative
Thysanocarpus curvipes subsp. eradiatusNative
Thysanocarpus curvipes subsp. longistylusNative
Thysanocarpus curvipes var. curvipes
(Under Thysanocarpus curvipes subsp. curvipes)
Synonym
Thysanocarpus curvipes var. eradiatus
(Under Thysanocarpus curvipes subsp. eradiatus)
Synonym
Thysanocarpus curvipes var. longistylus
(Under Thysanocarpus curvipes subsp. longistylus)
Synonym
Thysanocarpus desertorumNative
Thysanocarpus elegans
(Under Thysanocarpus curvipes subsp. elegans)
Synonym
Thysanocarpus laciniatusNative
Thysanocarpus laciniatus var. conchuliferus
(Under Thysanocarpus conchuliferus)
Synonym
Thysanocarpus laciniatus var. hitchcockii
(Under Thysanocarpus desertorum)
Synonym
Thysanocarpus laciniatus var. laciniatus
(Under Thysanocarpus laciniatus)
Synonym
Thysanocarpus laciniatus var. rigidus
(Under Thysanocarpus rigidus)
Synonym
Thysanocarpus pusillus
(Under Athysanus pusillus)
Synonym
Thysanocarpus radiansNative
Thysanocarpus radians var. montanus
(Under Thysanocarpus radians)
Synonym
Thysanocarpus rigidusNative
TiarellaSUGAR-SCOOP
Tiarella trifoliata
  ↳  Key to Tiarella trifoliata
LACE FLOWERNative
Tiarella trifoliata var. trifoliataNative
Tiarella trifoliata var. unifoliataNative
Tidestromia
  ↳  Key to Tidestromia
Tidestromia lanuginosaWOOLLY TIDESTROMIANative
Tidestromia lanuginosa subsp. eliassoniana
(Under Tidestromia lanuginosa)
Synonym
Tidestromia oblongifolia
(Under Tidestromia suffruticosa var. oblongifolia)
Synonym
Tidestromia oblongifolia subsp. cryptantha
(Under Tidestromia suffruticosa var. oblongifolia)
Synonym
Tidestromia suffruticosa var. oblongifoliaHONEYSWEETNative
Tillaea aquatica
(Under Crassula aquatica)
Synonym
Tillaea erecta
(Under Crassula connata)
Synonym
Tillaea muscosa
(Under Crassula tillaea)
Synonym
Tiniaria convolvulus
(Under Fallopia convolvulus)
Synonym
Tiniaria japonica
(Under Fallopia japonica)
Synonym
Tiniaria sachalinensis
(Under Fallopia sachalinensis)
Synonym
Tiquilia
  ↳  Key to Tiquilia
Tiquilia canescensSHRUBBY TIQUILIANative
Tiquilia canescens var. canescensNative
Tiquilia canescens var. pulchellaNative
Tiquilia nuttalliiANNUAL TIQUILIANative
Tiquilia palmeriPALMER'S TIQUILIANative
Tiquilia plicataFAN-LEAVED TIQUILIANative
Toelkenia ovata
(Under Crassula ovata)
Synonym
Tofieldia occidentalis subsp. occidentalis
(Under Triantha occidentalis subsp. occidentalis)
Synonym
TofieldiaceaeFALSE-ASPHODEL FAMILY
TolmieaPIG-A-BACK PLANT
Tolmiea diplomenziesiiNative
Tolpis
Tolpis barbataNaturalized
Tolpis umbellata
(Under Tolpis barbata)
Synonym
Tonella
Tonella tenellaNative
Tonestus
  ↳  Key to Tonestus
Tonestus eximiusTAHOE TONESTUSNative
Tonestus lyalliiLYALL'S TONESTUSNative
Tonestus peirsoniiPEIRSON'S TONESTUSNative
Torilis
  ↳  Key to Torilis
Torilis arvensisTALL SOCK-DESTROYERNaturalized
Torilis arvensis subsp. purpurea
(Under Torilis arvensis)
Synonym
Torilis nodosaSHORT SOCK-DESTROYERNaturalized
TorreyaTORREYA
Torreya californicaCALIFORNIA-NUTMEGNative
Torreya myristica
(Under Torreya californica)
Synonym
Torreyochloa
  ↳  Key to Torreyochloa
FALSE MANNA GRASS
Torreyochloa erectaNative
Torreyochloa pallida var. paucifloraWEAK MANNA GRASSNative
Torreyostellaria
Torreyostellaria jamesianaTUBER STARWORTNative
Townsendia
  ↳  Key to Townsendia
Townsendia condensataCUSHION TOWNSENDIANative
Townsendia leptotesSLENDER TOWNSENDIANative
Townsendia scapigeraNative
ToxicodendronPOISON OAK, POISON IVY
Toxicodendron diversilobumWESTERN POISON OAKNative
Toxicodendron trilobatum
(Under Rhus aromatica)
Synonym
Toxicodendron triphyllum var. trilobatum
(Under Rhus aromatica)
Invalid name
Toxicoscordion
  ↳  Key to Toxicoscordion
DEATH CAMAS
Toxicoscordion brevibracteatumNative
Toxicoscordion exaltatumNative
Toxicoscordion fontanumNative
Toxicoscordion fremontiiNative
Toxicoscordion micranthumNative
Toxicoscordion paniculatumNative
Toxicoscordion venenosum var. venenosumNative
Tracyina
Tracyina rostrataBEAKED TRACYINANative
Tradescantia
  ↳  Key to Tradescantia
Tradescantia fluminensisNaturalized
Tradescantia ohiensisWaif
Tradescantia virginiana
(Under Tradescantia ohiensis)
Misapplied name
TragiaNOSEBURN
Tragia ramosaDESERT TRAGIANative
Tragia stylaris
(Under Tragia ramosa)
Synonym
Tragopogon
  ↳  Key to Tragopogon
GOAT'S BEARD, SALSIFY
Tragopogon dubiusYELLOW SALSIFYNaturalized
Tragopogon porrifoliusSALSIFY, OYSTER PLANTNaturalized
Tragopogon pratensisMEADOW SALSIFYNaturalized
Transberingia
Transberingia bursifolia subsp. virgataVIRGATE HALIMOLOBOSNative
Trautvetteria
Trautvetteria caroliniensisNative
Trautvetteria caroliniensis var. occidentalis
(Under Trautvetteria caroliniensis)
Synonym
Trautvetteria grandis
(Under Trautvetteria caroliniensis)
Synonym
TriadicaTALLOWTREE
Triadica sebiferaCHINESE TALLOWTREENaturalized
Triantha
Triantha occidentalis subsp. occidentalisNative
TrianthemaHORSE-PURSLANE
Trianthema portulacastrumNative
TribulusPUNCTURE VINE, CALTROP
Tribulus terrestrisNaturalized
Tricardia
Tricardia watsoniiNative
Trichachne californica
(Under Digitaria californica var. californica)
Synonym
Trichocoronis
Trichocoronis riparia
(Under Trichocoronis wrightii var. wrightii)
Synonym
Trichocoronis wrightii var. wrightiiWRIGHT'S TRICHOCORONISNative or naturalized
Tricholaena rosea
(Under Melinis repens subsp. repens)
Synonym
Trichophorum
  ↳  Key to Trichophorum
Trichophorum clementisNative
Trichophorum emergens
(Under Trichophorum pumilum)
Synonym
Trichophorum pumilumLITTLE BULRUSHNative
Trichophorum pumilum var. rollandii
(Under Trichophorum pumilum)
Synonym
Trichoptilium
Trichoptilium incisumNative
Trichostema
  ↳  Key to Trichostema
BLUE CURLS
Trichostema austromontanumNative
Trichostema austromontanum subsp. austromontanumNative
Trichostema austromontanum subsp. compactumHIDDEN LAKE BLUECURLSNative
Trichostema lanatumWOOLLY BLUE CURLSNative
Trichostema lanceolatumVINEGAR WEEDNative
Trichostema laxumTURPENTINE WEEDNative
Trichostema micranthumSMALL-FLOWERED BLUECURLSNative
Trichostema oblongumNative
Trichostema ovatumSAN JOAQUIN BLUECURLSNative
Trichostema parishiiNative
Trichostema rubisepalumHERNANDEZ BLUECURLSNative
Trichostema ruygtiiNAPA BLUECURLSNative
Trichostema simulatumNative
Tridens
Tridens muticus var. muticusSLIM TRIDENSNative
Tridens pilosus
(Under Erioneuron pilosum)
Synonym
Tridens pulchellus
(Under Dasyochloa pulchella)
Synonym
Trientalis arctica
(Under Lysimachia europaea)
Synonym
Trientalis borealis subsp. latifolia
(Under Lysimachia latifolia)
Synonym
Trientalis europaea
(Under Lysimachia europaea)
Synonym
Trientalis europaea subsp. arctica
(Under Lysimachia europaea)
Synonym
Trientalis latifolia
(Under Lysimachia latifolia)
Synonym
Trifolium
  ↳  Key to Trifolium
CLOVER
Trifolium agrarium
(Under Trifolium aureum)
Misapplied name
Trifolium albopurpureumNative
Trifolium albopurpureum var. albopurpureum
(Under Trifolium albopurpureum)
Synonym
Trifolium albopurpureum var. columbinum
(Under Trifolium columbinum)
Synonym
Trifolium albopurpureum var. dichotomum
(Under Trifolium dichotomum)
Synonym
Trifolium albopurpureum var. olivaceum
(Under Trifolium columbinum)
Synonym
Trifolium alexandrinumEGYPTIAN CLOVERWaif
Trifolium amoenumTWO-FORK CLOVERNative
Trifolium amplectens
(Under Trifolium depauperatum var. amplectens)
Synonym
Trifolium amplectens var. hydrophilum
(Under Trifolium hydrophilum)
Synonym
Trifolium amplectens var. truncatum
(Under Trifolium depauperatum var. truncatum)
Synonym
Trifolium andersoniiNative
Trifolium andersonii subsp. andersoniiANDERSON'S CLOVERNative
Trifolium andersonii subsp. beatleyaeBEATLEY'S FIVE-LEAVED CLOVERNative
Trifolium andersonii subsp. monoense
(Under Trifolium andersonii subsp. beatleyae)
Synonym
Trifolium andersonii var. andersonii
(Under Trifolium andersonii subsp. andersonii)
Synonym
Trifolium andersonii var. beatleyae
(Under Trifolium andersonii subsp. beatleyae)
Synonym
Trifolium angustifoliumNARROW-LEAVED CLOVERNaturalized
Trifolium appendiculatumLARGE VARIEGATED CLOVERNative
Trifolium appendiculatum var. appendiculatum
(Under Trifolium appendiculatum)
Synonym
Trifolium appendiculatum var. rostratum
(Under Trifolium variegatum)
Synonym
Trifolium arvenseRABBITFOOT CLOVERNaturalized
Trifolium aureumLARGE HOP CLOVERNaturalized
Trifolium barbigerumBEARDED CLOVERNative
Trifolium barbigerum var. andrewsii
(Under Trifolium grayi)
Synonym
Trifolium barbigerum var. barbigerum
(Under Trifolium barbigerum)
Synonym
Trifolium beckwithiiBECKWITH'S CLOVERNative
Trifolium bifidumPINOLE CLOVERNative
Trifolium bifidum var. bifidum
(Under Trifolium bifidum)
Synonym
Trifolium bifidum var. decipiens
(Under Trifolium bifidum)
Synonym
Trifolium bolanderiBOLANDER'S CLOVERNative
Trifolium breweriBREWER'S CLOVERNative
Trifolium buckwestiorumSANTA CRUZ CLOVERNative
Trifolium campestreHOP CLOVERNaturalized
Trifolium cernuumNODDING CLOVERNaturalized
Trifolium ciliolatumFOOTHILL CLOVERNative
Trifolium columbinumOLIVE CLOVERNative
Trifolium cyathiferumBOWL CLOVERNative
Trifolium dedeckeraeDEDECKER'S CLOVERNative
Trifolium depauperatumNative
Trifolium depauperatum var. amplectensPALE SACK CLOVERNative
Trifolium depauperatum var. depauperatumDWARF SACK CLOVERNative
Trifolium depauperatum var. hydrophilum
(Under Trifolium hydrophilum)
Synonym
Trifolium depauperatum var. truncatumTRUNCATE SACK CLOVERNative
Trifolium dichotomumNative
Trifolium dubiumLITTLE HOP CLOVERNaturalized
Trifolium elmeri
(Under Trifolium longipes subsp. elmeri)
Synonym
Trifolium eriocephalum subsp. eriocephalumHAIRY HEAD CLOVERNative
Trifolium eriocephalum var. eriocephalum
(Under Trifolium eriocephalum subsp. eriocephalum)
Synonym
Trifolium fragiferumSTRAWBERRY CLOVERNaturalized
Trifolium fucatumBULL CLOVERNative
Trifolium fucatum var. gambelii
(Under Trifolium fucatum)
Synonym
Trifolium fucatum var. virescens
(Under Trifolium fucatum)
Synonym
Trifolium gemellum
(Under Trifolium striatum)
Misapplied name
Trifolium geminiflorum
(Under Trifolium variegatum)
Synonym
Trifolium glomeratumCLUSTERED CLOVERNaturalized
Trifolium gracilentumPINPOINT CLOVERNative
Trifolium gracilentum var. gracilentum
(Under Trifolium gracilentum)
Synonym
Trifolium gracilentum var. inconspicuum
(Under Trifolium gracilentum)
Synonym
Trifolium gracilentum var. palmeri
(Under Trifolium palmeri)
Synonym
Trifolium grayiGRAY'S CLOVERNative
Trifolium gymnocarponNUTTALL'S CLOVERNative
Trifolium gymnocarpon subsp. plummerae
(Under Trifolium gymnocarpon)
Synonym
Trifolium gymnocarpon var. plummerae
(Under Trifolium gymnocarpon)
Synonym
Trifolium hirtumROSE CLOVERNaturalized
Trifolium howelliiHOWELL'S CLOVERNative
Trifolium hybridumALSIKE CLOVERNaturalized
Trifolium hydrophilumSALINE CLOVERNative
Trifolium incarnatumCRIMSON CLOVERNaturalized
Trifolium jokerstiiBUTTE COUNTY GOLDEN CLOVERNative
Trifolium kingii subsp. dedeckerae
(Under Trifolium dedeckerae)
Synonym
Trifolium kingii var. productum
(Under Trifolium productum)
Synonym
Trifolium lemmoniiLEMMON'S CLOVERNative
Trifolium longipesLONG-STALKED CLOVERNative
Trifolium longipes subsp. atrorubensNative
Trifolium longipes subsp. elmeriELMER'S CLOVERNative
Trifolium longipes subsp. hanseniiNative
Trifolium longipes subsp. multipedunculatumNative
Trifolium longipes subsp. oreganumNative
Trifolium longipes subsp. shastenseNative
Trifolium longipes var. atrorubens
(Under Trifolium longipes subsp. atrorubens)
Synonym
Trifolium longipes var. elmeri
(Under Trifolium longipes subsp. elmeri)
Synonym
Trifolium longipes var. hansenii
(Under Trifolium longipes subsp. hansenii)
Synonym
Trifolium longipes var. multipedunculatum
(Under Trifolium longipes subsp. multipedunculatum)
Synonym
Trifolium longipes var. nevadense
(Under Trifolium longipes subsp. hansenii)
Synonym
Trifolium longipes var. oreganum
(Under Trifolium longipes subsp. oreganum)
Synonym
Trifolium longipes var. shastense
(Under Trifolium longipes subsp. shastense)
Synonym
Trifolium macilentum var. dedeckerae
(Under Trifolium dedeckerae)
Synonym
Trifolium macraeiMACRAE'S CLOVERNative
Trifolium macrocephalumLARGE-HEAD CLOVERNative
Trifolium microcephalumSMALL-HEAD CLOVERNative
Trifolium microdonTHIMBLE CLOVERNative
Trifolium microdon var. pilosum
(Under Trifolium microdon)
Synonym
Trifolium minutissimum
(Under Trifolium barbigerum)
Synonym
Trifolium monanthumNative
Trifolium monanthum subsp. grantianumGRANT'S CARPET CLOVERNative
Trifolium monanthum subsp. monanthumCARPET CLOVERNative
Trifolium monanthum subsp. parvumSMALL CARPET CLOVERNative
Trifolium monanthum subsp. tenerumDELICATE CARPET CLOVERNative
Trifolium monanthum var. eastwoodianum
(Under Trifolium monanthum subsp. tenerum)
Synonym
Trifolium monanthum var. grantianum
(Under Trifolium monanthum subsp. grantianum)
Synonym
Trifolium monanthum var. monanthum
(Under Trifolium monanthum subsp. monanthum)
Synonym
Trifolium monanthum var. parvum
(Under Trifolium monanthum subsp. parvum)
Synonym
Trifolium monoense
(Under Trifolium andersonii subsp. beatleyae)
Synonym
Trifolium multicaule
(Under Trifolium monanthum subsp. parvum)
Synonym
Trifolium obtusiflorumCLAMMY CLOVERNative
Trifolium oliganthumFEW-FLOWERED CLOVERNative
Trifolium olivaceum
(Under Trifolium columbinum)
Synonym
Trifolium oreganum
(Under Trifolium longipes subsp. oreganum)
Synonym
Trifolium palmeriSOUTHERN ISLAND CLOVERNative
Trifolium pauciflorum
(Under Trifolium variegatum)
Synonym
Trifolium piorkowskiiMAVERICK CLOVERNative
Trifolium plummerae
(Under Trifolium gymnocarpon)
Synonym
Trifolium polyodonPACIFIC GROVE CLOVERNative
Trifolium pratenseRED CLOVERNaturalized
Trifolium procumbens
(Under Trifolium campestre)
Synonym
Trifolium productumPRODUCTIVE CLOVERNative
Trifolium repensWHITE CLOVERNaturalized
Trifolium resupinatumREVERSED CLOVERNaturalized
Trifolium retusumTEASEL CLOVERNaturalized
Trifolium rusbyi var. atrorubens
(Under Trifolium longipes subsp. atrorubens)
Synonym
Trifolium siskiyouenseSISKIYOU CLOVERNative
Trifolium striatumKNOTTED CLOVERNaturalized
Trifolium subterraneumSUBTERRANEAN CLOVERNaturalized
Trifolium suffocatumSMALL CLUSTER CLOVERNaturalized
Trifolium tomentosumWOOLLY CLOVERNaturalized
Trifolium tomentosum var. tomentosum
(Under Trifolium tomentosum)
Synonym
Trifolium trichocalyxMONTEREY CLOVERNative
Trifolium tridentatum
(Under Trifolium willdenovii)
Synonym
Trifolium tridentatum var. aciculare
(Under Trifolium willdenovii)
Synonym
Trifolium variegatumNative
Trifolium variegatum var. geminiflorum
(Under Trifolium variegatum)
Synonym
Trifolium variegatum var. major
(Under Trifolium appendiculatum)
Synonym
Trifolium variegatum var. melananthum
(Under Trifolium appendiculatum)
Synonym
Trifolium variegatum var. pauciflorum
(Under Trifolium variegatum)
Synonym
Trifolium variegatum var. trilobatum
(Under Trifolium variegatum)
Synonym
Trifolium vesiculosumARROWLEAF CLOVERNaturalized
Trifolium willdenoviiTOMCAT CLOVERNative
Trifolium wormskioldiiCOW CLOVERNative
Trifolium wormskioldii var. siskiyouense
(Under Trifolium siskiyouense)
Synonym
Triglochin
  ↳  Key to Triglochin
ARROW-GRASS
Triglochin concinnaNative
Triglochin concinna var. concinnaSEASIDE ARROW-GRASSNative
Triglochin concinna var. debilisNative
Triglochin maritimaCOMMON ARROW-GRASSNative
Triglochin palustrisMARSH ARROW-GRASSNative
Triglochin scilloidesFLOWERING-QUILLWORTNative
Triglochin striataTHREE-RIBBED ARROW-GRASSNative
Trillium
  ↳  Key to Trillium
WAKEROBIN, TRILLIUM
Trillium albidumNative
Trillium angustipetalumNative
Trillium chloropetalumGIANT TRILLIUMNative
Trillium chloropetalum var. angustipetalum
(Under Trillium angustipetalum)
Synonym
Trillium chloropetalum var. giganteum
(Under Trillium chloropetalum)
Synonym
Trillium kurabayashii
(Under Trillium angustipetalum)
Synonym
Trillium ovatumWHITE or WESTERN TRILLIUMNative
Trillium ovatum subsp. oettingeriSALMON MOUNTAINS WAKEROBINNative
Trillium ovatum subsp. ovatumNative
Trillium rivale
(Under Pseudotrillium rivale)
Synonym
Trimorpha acris var. debilis
(Under Erigeron nivalis)
Synonym
Trimorpha lonchophylla
(Under Erigeron lonchophyllus)
Synonym
Triodanis
  ↳  Key to Triodanis
VENUS LOOKING-GLASS
Triodanis bifloraNative
Triodanis perfoliataNative
Triphysaria
  ↳  Key to Triphysaria
Triphysaria erianthaBUTTER-AND-EGGS, JOHNNY-TUCKNative
Triphysaria eriantha subsp. erianthaNative
Triphysaria eriantha subsp. roseaNative
Triphysaria floribundaSAN FRANCISCO OWL'S-CLOVERNative
Triphysaria micranthaNative
Triphysaria pusillaNative
Triphysaria versicolorNative
Triphysaria versicolor subsp. faucibarbataNative
Triphysaria versicolor subsp. versicolorNative
Tripleurospermum
Tripleurospermum inodorumSCENTLESS MAYWEED, FALSE CHAMOMILENaturalized
Tripleurospermum maritimum
(Under Tripleurospermum inodorum)
Misapplied name
Tripterocalyx
  ↳  Key to Tripterocalyx
Tripterocalyx crux-maltaeKELLOGG'S SAND-VERBENANative
Tripterocalyx micranthusSMALL-FLOWERED SAND-VERBENANative
Trisetum
  ↳  Key to Trisetum
Trisetum canescensTALL FALSE OATNative
Trisetum cernuumNODDING FALSE OATNative
Trisetum cernuum var. canescens
(Under Trisetum canescens)
Synonym
Trisetum cernuum var. projectum
(Under Trisetum projectum)
Synonym
Trisetum montanum
(Under Trisetum spicatum)
Synonym
Trisetum projectumINTERRUPTED FALSE OATNative
Trisetum spicatumSPIKE FALSE OATNative
Trisetum spicatum var. projectum
(Under Trisetum projectum)
Synonym
Trisetum spicatum var. spicatum
(Under Trisetum spicatum)
Synonym
Trisetum wolfiiWOLF'S FALSE OATNative
Triteleia
  ↳  Key to Triteleia
Triteleia angustiflora
(Under Triteleia laxa)
Synonym
Triteleia anilina
(Under Triteleia ixioides subsp. anilina)
Synonym
Triteleia bicolor
(Under Triteleia grandiflora)
Synonym
Triteleia bridgesiiNative
Triteleia candida
(Under Triteleia laxa)
Synonym
Triteleia clementinaSAN CLEMENTE ISLAND TRITELEIANative
Triteleia croceaNative
Triteleia crocea var. modesta
(Under Triteleia crocea)
Synonym
Triteleia dudleyiNative
Triteleia gracilis
(Under Triteleia montana)
Illegitimate name
Triteleia grandifloraLARGE-FLOWERED TRITELEIANative
Triteleia grandiflora subsp. howellii
(Under Triteleia grandiflora)
Synonym ined.
Triteleia grandiflora var. howellii
(Under Triteleia grandiflora)
Synonym
Triteleia hendersoniiNative
Triteleia hendersonii var. leachiae
(Under Triteleia hendersonii)
Synonym
Triteleia howellii
(Under Triteleia grandiflora)
Synonym
Triteleia hyacinthinaWHITE BRODIAEA, FOOL'S ONIONNative
Triteleia hyacinthina var. greenei
(Under Triteleia lilacina)
Synonym
Triteleia ixioidesNative
Triteleia ixioides subsp. anilinaPRETTY FACENative
Triteleia ixioides subsp. cookiiCOOK'S TRITELEIANative
Triteleia ixioides subsp. ixioidesGOLDEN BRODIAEANative
Triteleia ixioides subsp. scabraNative
Triteleia ixioides subsp. unifoliaNative
Triteleia ixioides var. anilina
(Under Triteleia ixioides subsp. anilina)
Synonym
Triteleia ixioides var. cookii
(Under Triteleia ixioides subsp. cookii)
Synonym
Triteleia ixioides var. scabra
(Under Triteleia ixioides subsp. scabra)
Synonym
Triteleia lactea
(Under Triteleia hyacinthina)
Synonym
Triteleia laxaITHURIEL'S SPEAR, COMMON TRITELEIANative
Triteleia lilacinaNative
Triteleia lugensDARK-MOUTHED TRITELEIANative
Triteleia modesta
(Under Triteleia crocea)
Synonym
Triteleia montanaMOUNTAIN TRITELEIANative
Triteleia peduncularisLONG-RAYED BRODIAEANative
Triteleia piutensisPIUTE MOUNTAINS TRITELEIANative
Triteleia scabra
(Under Triteleia ixioides subsp. scabra)
Synonym
Triteleia uniflora
(Under Ipheion uniflorum)
Synonym
TriticumWHEAT, GOAT GRASS
Triticum aestivumNaturalized
Trixis
Trixis californica var. californicaNative
TropaeolaceaeNASTURTIUM FAMILY
Tropaeolum
Tropaeolum majusGARDEN NASTURTIUMNaturalized
Tropidocarpum
  ↳  Key to Tropidocarpum
Tropidocarpum californicumKINGS GOLDNative
Tropidocarpum capparideumCAPER-FRUITED TROPIDOCARPUMNative
Tropidocarpum gracileNative
Tropidocarpum gracile var. dubium
(Under Tropidocarpum gracile)
Synonym
Tsuga
  ↳  Key to Tsuga
HEMLOCK
Tsuga heterophyllaWESTERN HEMLOCKNative
Tsuga mertensianaMOUNTAIN HEMLOCKNative
Tuberaria
Tuberaria guttataNaturalized
Tuctoria
  ↳  Key to Tuctoria
Tuctoria greeneiGREENE'S TUCTORIANative
Tuctoria mucronataCRAMPTON'S TUCTORIA, SOLANO GRASSNative
Tulipa
Tulipa clusianaTULIPNaturalized
Tumion californicum
(Under Torreya californica)
Synonym
Tunica prolifera
(Under Petrorhagia prolifera)
Synonym
Turricula parryi
(Under Eriodictyon parryi)
Synonym
TurritisTOWER MUSTARD
Turritis glabraNative
Twisselmannia californica
(Under Tropidocarpum californicum)
Synonym
Typha
  ↳  Key to Typha
CATTAIL
Typha angustifoliaNARROW-LEAVED CATTAILNative or naturalized
Typha domingensisSOUTHERN CATTAILNative
Typha latifoliaBROAD-LEAVED CATTAILNative
Typhaceae
  ↳  Key to Typhaceae
CATTAIL FAMILY
UlexGORSE, FURZE
Ulex europaea
(Under Ulex europaeus)
Orthographic variant
Ulex europaeusNaturalized
UlmaceaeELM FAMILY
Ulmus
  ↳  Key to Ulmus
ELM
Ulmus americanaAMERICAN ELMWaif
Ulmus carpinifolia
(Under Ulmus minor)
Synonym
Ulmus minorENGLISH ELMWaif
Ulmus parvifoliaCHINESE ELM, LACEBARK ELMNaturalized
Ulmus procera
(Under Ulmus minor)
Synonym
Ulmus pumilaSIBERIAN ELMNaturalized
UmbellulariaCALIFORNIA BAY, CALIFORNIA LAUREL, PEPPERWOOD
Umbellularia californicaNative
Umbellularia californica var. fresnensis
(Under Umbellularia californica)
Synonym
UropappusSILVERPUFFS
Uropappus lindleyiNative
Urospermum
Urospermum picroidesNaturalized
Urtica
  ↳  Key to Urtica
STINGING NETTLE
Urtica californica
(Under Urtica dioica subsp. gracilis)
Synonym
Urtica dioicaNative
Urtica dioica subsp. gracilisAMERICAN STINGING NETTLENative
Urtica dioica subsp. holosericeaHOARY NETTLENative
Urtica gracilis
(Under Urtica dioica subsp. gracilis)
Synonym
Urtica holosericea
(Under Urtica dioica subsp. holosericea)
Synonym
Urtica lyallii
(Under Urtica dioica subsp. gracilis)
Synonym
Urtica urensDWARF NETTLENaturalized
Urticaceae
  ↳  Key to Urticaceae
NETTLE FAMILY
Utricularia
  ↳  Key to Utricularia
BLADDERWORT
Utricularia biflora
(Under Utricularia gibba)
Synonym
Utricularia cleistogama
(Under Utricularia subulata)
Synonym
Utricularia exoleta
(Under Utricularia gibba)
Synonym
Utricularia fibrosa
(Under Utricularia gibba)
Synonym
Utricularia gibbaNative
Utricularia intermediaFLAT-LEAVED BLADDERWORTNative
Utricularia macrorhizaCOMMON BLADDERWORTNative
Utricularia minorLESSER BLADDERWORTNative
Utricularia ochroleucaCREAM-FLOWERED BLADDERWORTNative
Utricularia stygia
(Under Utricularia ochroleuca)
Synonym
Utricularia subulataNaturalized
Utricularia vulgaris subsp. macrorhiza
(Under Utricularia macrorhiza)
Synonym
Utricularia vulgaris var. americana
(Under Utricularia macrorhiza)
Synonym
Vaccaria hispanica
(Under Gypsophila vaccaria)
Synonym
Vaccaria segetalis
(Under Gypsophila vaccaria)
Synonym
Vaccinium
  ↳  Key to Vaccinium
BLUEBERRY, HUCKLEBERRY
Vaccinium arbuscula
(Under Vaccinium cespitosum)
Synonym
Vaccinium caespitosum
(Under Vaccinium cespitosum)
Orthographic variant
Vaccinium cespitosumDWARF BILBERRYNative
Vaccinium deliciosumCASCADE BILBERRYNative
Vaccinium macrocarponCRANBERRYNaturalized
Vaccinium membranaceumTHINLEAF HUCKLEBERRYNative
Vaccinium nivictum
(Under Vaccinium cespitosum)
Synonym
Vaccinium occidentale
(Under Vaccinium uliginosum subsp. occidentale)
Synonym
Vaccinium ovatumCALIFORNIA HUCKLEBERRYNative
Vaccinium ovatum var. saporosum
(Under Vaccinium ovatum)
Synonym
Vaccinium parvifoliumRED HUCKLEBERRYNative
Vaccinium scopariumLITTLE-LEAVED HUCKLEBERRYNative
Vaccinium shastenseNative
Vaccinium shastense subsp. nevadenseSIERRA HUCKLEBERRYNative
Vaccinium shastense subsp. shastenseSHASTA HUCKLEBERRYNative
Vaccinium uliginosum subsp. occidentaleWESTERN BLUEBERRYNative
Vachellia
Vachellia farnesiana
  ↳  Key to Vachellia farnesiana
SWEET ACACIANaturalized
Vachellia farnesiana var. farnesianaNaturalized
Vachellia farnesiana var. minutaNaturalized
VahlodeaMOUNTAIN HAIR GRASS
Vahlodea atropurpureaNative
Valeriana
  ↳  Key to Valeriana
VALERIAN
Valeriana californicaNative
Valeriana capitata subsp. californica
(Under Valeriana californica)
Synonym
Valeriana hookeri
(Under Valeriana sitchensis subsp. scouleri)
Synonym
Valeriana occidentalisWESTERN VALERIANNative
Valeriana pubicarpaNative
Valeriana scouleri
(Under Valeriana sitchensis subsp. scouleri)
Illegitimate name
Valeriana sitchensisNative
Valeriana sitchensis subsp. scouleriNative
Valeriana sitchensis subsp. sitchensisNative
Valerianaceae
  ↳  Key to Valerianaceae
VALERIAN FAMILY
Valerianella
  ↳  Key to Valerianella
CORN SALAD
Valerianella carinataNaturalized
Valerianella locustaNaturalized
Valerianella olitoria
(Under Valerianella locusta)
Synonym
Vancouveria
  ↳  Key to Vancouveria
INSIDE-OUT-FLOWER
Vancouveria chrysanthaSISKIYOU INSIDE-OUT-FLOWERNative
Vancouveria hexandraNative
Vancouveria parviflora
(Under Vancouveria planipetala)
Synonym
Vancouveria planipetalaREDWOOD IVYNative
Veatchia crystallina
(Under Triteleia hyacinthina)
Synonym
Velezia rigida
(Under Dianthus nudiflorus)
Synonym
VenegasiaCANYON-SUNFLOWER
Venegasia carpesioidesNative
Ventenata
Ventenata dubiaNORTH AFRICA GRASSNaturalized
Veratrum
  ↳  Key to Veratrum
CORN LILY, FALSE-HELLEBORE
Veratrum californicum var. californicumNative
Veratrum californicum var. caudatum
(Under Veratrum californicum var. californicum)
Synonym
Veratrum fimbriatumFRINGED FALSE-HELLEBORENative
Veratrum insolitumSISKIYOU FALSE-HELLEBORENative
Veratrum virideNative
Veratrum viride var. eschscholzianum
(Under Veratrum viride)
Synonym
Verbascum
  ↳  Key to Verbascum
MULLEIN
Verbascum blattariaMOTH MULLEINNaturalized
Verbascum bombyciferumGIANT SILVER MULLEINNaturalized
Verbascum speciosumSHOWY MULLEINNaturalized
Verbascum thapsusWOOLLY MULLEINNaturalized
Verbascum virgatumWAND MULLEINNaturalized
Verbena
  ↳  Key to Verbena
VERVAIN
Verbena abramsii
(Under Verbena lasiostachys var. lasiostachys)
Synonym
Verbena bonariensisNaturalized
Verbena bonariensis var. bonariensis
(Under Verbena bonariensis)
Synonym
Verbena bonariensis var. conglomerata
(Under Verbena bonariensis)
Synonym
Verbena bracteataNative
Verbena brasiliensis
(Under Verbena litoralis)
Synonym
Verbena californicaRED HILLS VERVAINNative
Verbena gooddingiiNative
Verbena gooddingii var. nepetifolia
(Under Verbena gooddingii)
Synonym
Verbena hastataNative
Verbena hastata var. scabra
(Under Verbena hastata)
Synonym
Verbena incompta
(Under Verbena bonariensis)
Synonym
Verbena lasiostachysNative
Verbena lasiostachys var. lasiostachysNative
Verbena lasiostachys var. scabridaNative
Verbena litoralisNaturalized
Verbena litoralis var. brasiliensis
(Under Verbena litoralis)
Synonym
Verbena menthifoliaNative
Verbena pulchellaNaturalized
Verbena robusta
(Under Verbena lasiostachys var. scabrida)
Synonym
Verbena scabraNative
Verbena tenuisecta
(Under Verbena pulchella)
Synonym
Verbenaceae
  ↳  Key to Verbenaceae
VERVAIN FAMILY
Verbesina
  ↳  Key to Verbesina
CROWNBEARD
Verbesina dissitaBIG-LEAVED CROWNBEARDNative
Verbesina encelioides subsp. exauriculataGOLDEN CROWNBEARDNaturalized
Verbesina encelioides var. exauriculata
(Under Verbesina encelioides subsp. exauriculata)
Synonym
Veronica
  ↳  Key to Veronica
SPEEDWELL, BROOKLIME
Veronica alpina var. alterniflora
(Under Veronica wormskjoldii)
Synonym
Veronica americanaAMERICAN BROOKLIMENative
Veronica anagallis-aquaticaWATER SPEEDWELLNaturalized
Veronica arvensisNaturalized
Veronica catenataCHAIN SPEEDWELLNative
Veronica comosa
(Under Veronica catenata)
Synonym
Veronica copelandiiCOPELAND'S SPEEDWELLNative
Veronica cusickiiCUSICK'S SPEEDWELLNative
Veronica peregrina subsp. xalapensisPURSLANE SPEEDWELLNative
Veronica persicaPERSIAN SPEEDWELLNaturalized
Veronica scutellataMARSH SPEEDWELLNative
Veronica serpyllifolia subsp. humifusaNative
Veronica triphyllosWaif
Veronica wormskjoldiiAMERICAN ALPINE SPEEDWELLNative
Viburnaceae
  ↳  Key to Viburnaceae
MUSKROOT FAMILY
Viburnum
  ↳  Key to Viburnum
Viburnum edule
(Under Viburnum opulus)
Misapplied name
Viburnum ellipticumOVAL-LEAVED VIBURNUMNative
Viburnum opulusCRANBERRYBUSHNaturalized
Viburnum rigidumNaturalized
Vicia
  ↳  Key to Vicia
VETCH
Vicia americana subsp. americanaAMERICAN VETCHNative
Vicia americana subsp. oregana
(Under Vicia americana subsp. americana)
Synonym
Vicia americana var. americana
(Under Vicia americana subsp. americana)
Synonym
Vicia americana var. linearis
(Under Vicia americana subsp. americana)
Synonym
Vicia americana var. truncata
(Under Vicia americana subsp. americana)
Synonym
Vicia angustifolia
(Under Vicia sativa subsp. nigra)
Synonym
Vicia benghalensisPURPLE VETCHNaturalized
Vicia bithynicaBITHYNIAN VETCHWaif
Vicia californica
(Under Vicia americana subsp. americana)
Synonym
Vicia craccaBIRD VETCHWaif
Vicia dasycarpa
(Under Vicia villosa subsp. varia)
Synonym
Vicia dispermaTWO-SEEDED VETCHWaif
Vicia exigua var. exigua
(Under Vicia ludoviciana subsp. ludoviciana)
Synonym
Vicia exigua var. hassei
(Under Vicia hassei)
Synonym
Vicia fabaFAVA BEAN, BROAD BEAN, HORSE BEANWaif
Vicia giganteaGIANT VETCHNative
Vicia hasseiSLENDER VETCHNative
Vicia hirsutaNaturalized
Vicia lathyroidesWaif
Vicia ludoviciana subsp. ludovicianaDEERPEA VETCHNative
Vicia ludoviciana var. ludoviciana
(Under Vicia ludoviciana subsp. ludoviciana)
Synonym
Vicia luteaYELLOW VETCHNaturalized
Vicia nigricans var. gigantea
(Under Vicia gigantea)
Synonym
Vicia pannonicaHUNGARIAN VETCHWaif
Vicia sativaNaturalized
Vicia sativa subsp. nigraNARROW-LEAVED VETCHNaturalized
Vicia sativa subsp. sativaSPRING VETCHNaturalized
Vicia tetraspermaSPARROW VETCHNaturalized
Vicia villosaHAIRY VETCH, WINTER VETCHNaturalized
Vicia villosa subsp. variaNaturalized
Vicia villosa subsp. villosaNaturalized
Viguiera deltoidea var. parishii
(Under Bahiopsis parishii)
Synonym
Viguiera laciniata
(Under Bahiopsis laciniata)
Synonym
Viguiera parishii
(Under Bahiopsis parishii)
Synonym
Viguiera purisimae
(Under Aldama purisimae)
Synonym
Viguiera reticulata
(Under Bahiopsis reticulata)
Synonym
Villarsia pumila
(Under Hesperochiron pumilus)
Synonym
VincaPERIWINKLE
Vinca majorGREATER PERIWINKLENaturalized
Vinca rosea
(Under Catharanthus roseus)
Synonym
Viola
  ↳  Key to Viola
VIOLET
Viola adunca subsp. aduncaWESTERN DOG VIOLET, EARLY BLUE VIOLETNative
Viola adunca subsp. ashtoniae
(Under Viola adunca subsp. adunca)
Synonym
Viola adunca subsp. oxyceras
(Under Viola adunca subsp. adunca)
Synonym
Viola adunca var. adunca
(Under Viola adunca subsp. adunca)
Synonym
Viola adunca var. cascadensis
(Under Viola adunca subsp. adunca)
Synonym
Viola adunca var. kirkii
(Under Viola adunca subsp. adunca)
Synonym
Viola adunca var. uncinulata
(Under Viola adunca subsp. adunca)
Synonym
Viola affinis
(Under Viola nephrophylla)
Synonym
Viola arizonica
(Under Viola nephrophylla)
Synonym
Viola arvensisFIELD PANSY, EUROPEAN FIELD-PANSY, WILD PANSYNaturalized
Viola aurea
(Under Viola purpurea subsp. aurea)
Synonym
Viola aurea subsp. mohavensis
(Under Viola purpurea subsp. mohavensis)
Synonym
Viola aurea var. venosa
(Under Viola purpurea subsp. venosa)
Synonym
Viola bakeriBAKER'S VIOLETNative
Viola bakeri subsp. shastensis
(Under Viola bakeri)
Synonym
Viola beckwithiiBECKWITH'S VIOLET, GREAT BASIN VIOLETNative
Viola beckwithii subsp. glabrata
(Under Viola beckwithii)
Synonym
Viola blanda subsp. macloskeyi
(Under Viola macloskeyi)
Synonym
Viola blanda var. macloskeyi
(Under Viola macloskeyi)
Synonym
Viola californica
(Under Viola glabella)
Synonym
Viola cascadensis
(Under Viola adunca subsp. adunca)
Synonym
Viola chrysantha
(Under Viola douglasii)
Illegitimate name
Viola cognata
(Under Viola nephrophylla)
Synonym
Viola cuneataNORTHERN TWO-EYED VIOLET, WEDGE-LEAVED VIOLETNative
Viola deltoidea
(Under Viola glabella)
Illegitimate name
Viola douglasiiDOUGLAS' VIOLET, GOLDEN VIOLETNative
Viola glabellaSTREAM VIOLET, SMOOTH YELLOW VIOLETNative
Viola halliiHALL'S VIOLET, WILD PANSYNative
Viola howelliiHOWELL'S VIOLETNative
Viola kelloggii
(Under Viola purpurea subsp. purpurea)
Synonym
Viola langsdorffiiALASKA VIOLET, LANGSDORFF'S VIOLETNative
Viola linguifolia
(Under Viola praemorsa subsp. linguifolia)
Synonym
Viola lobataPINE VIOLET, YELLOW WOOD VIOLETNative
Viola lobata subsp. integrifoliaNative
Viola lobata subsp. lobataNative
Viola lobata subsp. psychodes
(Under Viola lobata subsp. lobata)
Synonym
Viola macloskeyiMACLOSKEY'S VIOLET, SMALL WHITE VIOLET, SMOOTH WHITE VIOLETNative
Viola macloskeyi subsp. pallens
(Under Viola macloskeyi)
Synonym
Viola mccabeiana
(Under Viola nephrophylla)
Synonym
Viola nephrophyllaLECONTE VIOLETNative
Viola nephrophylla var. arizonica
(Under Viola nephrophylla)
Synonym
Viola nephrophylla var. cognata
(Under Viola nephrophylla)
Synonym
Viola nuttallii subsp. praemorsa
(Under Viola praemorsa subsp. praemorsa)
Synonym
Viola nuttallii var. linguifolia
(Under Viola praemorsa subsp. linguifolia)
Synonym
Viola nuttallii var. praemorsa
(Under Viola praemorsa subsp. praemorsa)
Synonym
Viola nuttallii var. venosa
(Under Viola purpurea subsp. venosa)
Synonym
Viola ocellataWESTERN HEART'S EASE, TWO-EYED VIOLETNative
Viola odorataENGLISH VIOLET, SWEET VIOLETNaturalized
Viola pallens
(Under Viola macloskeyi)
Synonym
Viola pallens subsp. macloskeyi
(Under Viola macloskeyi)
Synonym
Viola palustrisALPINE MARSH VIOLETNative
Viola palustris subsp. brevipes
(Under Viola palustris)
Synonym
Viola palustris var. brevipes
(Under Viola palustris)
Synonym
Viola pedunculataJOHNNY-JUMP-UPNative
Viola pedunculata subsp. pedunculata
(Under Viola pedunculata)
Synonym
Viola pedunculata subsp. tenuifolia
(Under Viola pedunculata)
Synonym
Viola pinetorumMOUNTAIN YELLOW VIOLETNative
Viola pinetorum subsp. griseaGRAY-LEAVED VIOLETNative
Viola pinetorum subsp. pinetorumNative
Viola pinetorum var. grisea
(Under Viola pinetorum subsp. grisea)
Synonym
Viola pinetorum var. pinetorum
(Under Viola pinetorum subsp. pinetorum)
Synonym
Viola praemorsaNative
Viola praemorsa subsp. arida
(Under Viola praemorsa subsp. linguifolia)
Synonym
Viola praemorsa subsp. linguifoliaNative
Viola praemorsa subsp. major
(Under Viola praemorsa subsp. linguifolia)
Synonym
Viola praemorsa subsp. oregona
(Under Viola praemorsa subsp. linguifolia)
Synonym
Viola praemorsa subsp. praemorsaASTORIA VIOLET, YELLOW MONTANE VIOLETNative
Viola primulifolia subsp. occidentalisWESTERN WHITE BOG VIOLETNative
Viola purpureaNative
Viola purpurea subsp. atriplicifolia
(Under Viola purpurea subsp. venosa)
Synonym, in part
Viola purpurea subsp. aureaGOLDEN VIOLETNative
Viola purpurea subsp. dimorphaNative
Viola purpurea subsp. geophyta
(Under Viola purpurea subsp. venosa)
Synonym
Viola purpurea subsp. integrifoliaNative
Viola purpurea subsp. mesophytaNative
Viola purpurea subsp. mohavensisNative
Viola purpurea subsp. purpureaMOUNTAIN VIOLETNative
Viola purpurea subsp. quercetorumNative
Viola purpurea subsp. venosaPURPLE-MARKED YELLOW VIOLETNative
Viola purpurea subsp. xerophyta
(Under Viola pinetorum subsp. grisea)
Synonym, in part
Viola purpurea subsp. xerophyta
(Under Viola pinetorum subsp. pinetorum)
Synonym, in part
Viola purpurea var. aurea
(Under Viola purpurea subsp. aurea)
Synonym
Viola purpurea var. grisea
(Under Viola pinetorum subsp. grisea)
Synonym
Viola purpurea var. pinetorum
(Under Viola pinetorum subsp. pinetorum)
Synonym
Viola quercetorum
(Under Viola purpurea subsp. quercetorum)
Synonym
Viola sarmentosa
(Under Viola sempervirens)
Illegitimate name
Viola sempervirensEVERGREEN VIOLET, REDWOOD VIOLETNative
Viola sempervirens subsp. orbiculoides
(Under Viola sempervirens)
Synonym
Viola sequoiensis
(Under Viola lobata subsp. lobata)
Synonym
Viola sheltoniiSHELTON'S VIOLETNative
Viola sheltonii var. biternata
(Under Viola sheltonii)
Synonym
Viola simulata
(Under Viola langsdorffii)
Synonym
Viola sororia subsp. affinis
(Under Viola nephrophylla)
Synonym
Viola sororia var. affinis
(Under Viola nephrophylla)
Synonym
Viola superba
(Under Viola langsdorffii)
Synonym
Viola tomentosaFELT-LEAVED VIOLETNative
Viola tricolor var. arvensis
(Under Viola arvensis)
Synonym
Viola uncinulata
(Under Viola adunca subsp. adunca)
Synonym
Viola venosa
(Under Viola purpurea subsp. venosa)
Synonym
ViolaceaeVIOLET FAMILY
Viscaceae
  ↳  Key to Viscaceae
MISTLETOE FAMILY
ViscumMISTLETOE
Viscum albumEUROPEAN MISTLETOENaturalized
Vitaceae
  ↳  Key to Vitaceae
GRAPE FAMILY
Vitis
  ↳  Key to Vitis
GRAPE
Vitis californicaCALIFORNIA WILD GRAPENative
Vitis girdianaDESERT WILD GRAPENative
Vitis rupestrisROCK GRAPEWaif
Vitis viniferaWINE GRAPENaturalized
Volutaria
  ↳  Key to Volutaria
Volutaria canariensis
(Under Volutaria tubuliflora)
Misapplied name
Volutaria muricataMOROCCO KNAPWEEDNaturalized
Volutaria tubulifloraEGYPTIAN KNAPWEEDNaturalized
Vulpia bromoides
(Under Festuca bromoides)
Synonym
Vulpia microstachys var. ciliata
(Under Festuca microstachys)
Synonym
Vulpia microstachys var. confusa
(Under Festuca microstachys)
Synonym
Vulpia microstachys var. microstachys
(Under Festuca microstachys)
Synonym
Vulpia microstachys var. pauciflora
(Under Festuca microstachys)
Synonym
Vulpia myuros f. myuros
(Under Festuca myuros)
Synonym
Vulpia myuros var. hirsuta
(Under Festuca myuros)
Synonym
Vulpia myuros var. myuros
(Under Festuca myuros)
Synonym
Vulpia octoflora
(Under Festuca octoflora)
Synonym
Vulpia octoflora var. hirtella
(Under Festuca octoflora)
Synonym
Washingtonia
  ↳  Key to Washingtonia
FAN PALM
Washingtonia filiferaCALIFORNIA FAN PALMNative
Washingtonia robustaMEXICAN FAN PALMNaturalized
Watsonia
  ↳  Key to Watsonia
Watsonia bulbillifera
(Under Watsonia meriana)
Synonym
Watsonia marginataWaif
Watsonia merianaNaturalized
WhippleaMODESTY
Whipplea modestaNative
Whitlavia grandiflora
(Under Phacelia minor)
Synonym
Whitlavia minor
(Under Phacelia minor)
Synonym
Whitneya dealbata
(Under Arnica dealbata)
Synonym
Wigandia
Wigandia caracasana
(Under Wigandia urens)
Synonym
Wigandia caracasana f. viscosa
(Under Wigandia urens)
Synonym
Wigandia caracasana var. calycina
(Under Wigandia urens)
Synonym
Wigandia caracasana var. macrophylla
(Under Wigandia urens)
Synonym
Wigandia caracasana var. viscosa
(Under Wigandia urens)
Synonym
Wigandia kunthii var. intermedia
(Under Wigandia urens)
Synonym
Wigandia kunthii var. macrophylla
(Under Wigandia urens)
Synonym
Wigandia kunthii var. viscosa
(Under Wigandia urens)
Synonym
Wigandia macrophylla
(Under Wigandia urens)
Synonym
Wigandia peruviana
(Under Wigandia urens)
Synonym
Wigandia scorpioides
(Under Wigandia urens)
Synonym
Wigandia urensSTINGING WIGANDIANaturalized
Wigandia urens var. caracasana
(Under Wigandia urens)
Synonym
Wislizenia californica
(Under Cleomella californica)
Synonym
Wislizenia palmeri
(Under Cleomella palmeri)
Synonym
Wislizenia refracta subsp. californica
(Under Cleomella californica)
Synonym
Wislizenia refracta subsp. palmeri
(Under Cleomella palmeri)
Synonym
Wislizenia refracta subsp. refracta
(Under Cleomella refracta)
Synonym
Wolffia
  ↳  Key to Wolffia
WATERMEAL
Wolffia arrhizaNaturalized
Wolffia borealisNative
Wolffia brasiliensisBRAZILIAN WATERMEALNative
Wolffia columbianaNative
Wolffia cylindracea
(Under Wolffia globosa)
Synonym
Wolffia globosaNative
Wolffia punctata
(Under Wolffia borealis)
Superfluous name
Wolffiella
  ↳  Key to Wolffiella
MUD-MIDGET
Wolffiella lingulataNative
Wolffiella oblongaNative
Woodsia
  ↳  Key to Woodsia
CLIFF FERN
Woodsia oreganaNative
Woodsia plummeraePLUMMER'S WOODSIANative
Woodsia scopulinaNative
WoodsiaceaeCLIFF FERN FAMILY
WoodwardiaCHAIN FERN
Woodwardia chamissoi
(Under Woodwardia fimbriata)
Synonym
Woodwardia fimbriataGIANT CHAIN FERNNative
Woodwardia radicans
(Under Woodwardia fimbriata)
Misapplied name
Wyethia
  ↳  Key to Wyethia
MULE'S EARS
Wyethia angustifoliaNative
Wyethia bolanderiBOLANDER'S MULE'S EARSNative
Wyethia elataHALL'S WYETHIANative
Wyethia glabraNative
Wyethia helenioidesNative
Wyethia invenustaRAYLESS MULE'S EARSNative
Wyethia longicaulisHUMBOLDT COUNTY WYETHIANative
Wyethia mollisNative
Wyethia ovataSOUTHERN MULE'S EARSNative
Wyethia reticulataEL DORADO COUNTY MULE EARSNative
Xanthisma
  ↳  Key to Xanthisma
Xanthisma gracileANNUAL BRISTLEWEEDNative
Xanthisma junceumRUSH-LIKE BRISTLEWEEDNative
Xanthisma spinulosum var. gooddingiiSPINY GOLDENWEEDNative
Xanthium
  ↳  Key to Xanthium
COCKLEBUR
Xanthium orientaleCOMMON COCKLEBURNative
Xanthium spinosumSPINY COCKLEBUR, SPINY CLOTBUTNaturalized
Xanthium strumarium
(Under Xanthium orientale)
Misapplied name
Xanthium strumarium var. canadense
(Under Xanthium orientale)
Synonym
Xanthium strumarium var. glabratum
(Under Xanthium orientale)
Synonym
Xanthocyparis nootkatensis
(Under Callitropsis nootkatensis)
Superfluous name
Xerobotrys glaucus
(Under Arctostaphylos glauca)
Synonym
Xerobotrys venulosus
(Under Arctostaphylos hookeri subsp. hookeri)
Synonym
XerophyllumBEAR-GRASS, BASKET-GRASS
Xerophyllum tenaxNative
Xylococcus
Xylococcus bicolorNative
Xylorhiza
  ↳  Key to Xylorhiza
DESERT-ASTER
Xylorhiza cognataMECCA-ASTERNative
Xylorhiza orcuttiiORCUTT'S WOODY-ASTERNative
Xylorhiza tortifolia var. tortifoliaMOJAVE-ASTERNative
Yabea
Yabea microcarpaNative
Yucca
  ↳  Key to Yucca
SPANISH BAYONET, YUCCA
Yucca baccata var. baccataBANANA YUCCA, BLUE YUCCANative
Yucca brevifoliaWESTERN JOSHUA TREENative
Yucca brevifolia var. herbertii
(Under Yucca brevifolia)
Synonym
Yucca brevifolia var. jaegeriana
(Under Yucca jaegeriana)
Synonym
Yucca californica
(Under Hesperoyucca whipplei)
Synonym
Yucca californica
(Under Yucca schidigera)
Synonym
Yucca graminifolia
(Under Hesperoyucca whipplei)
Illegitimate name
Yucca jaegerianaEASTERN JOSHUA TREENative
Yucca mohavensis
(Under Yucca schidigera)
Synonym
Yucca nitida
(Under Hesperoyucca whipplei)
Synonym
Yucca ortgiesiana
(Under Hesperoyucca whipplei)
Synonym
Yucca schidigeraMOJAVE YUCCANative
Yucca whipplei
(Under Hesperoyucca whipplei)
Synonym
Yucca whipplei subsp. caespitosa
(Under Hesperoyucca whipplei)
Synonym
Yucca whipplei subsp. intermedia
(Under Hesperoyucca whipplei)
Synonym
Yucca whipplei subsp. parishii
(Under Hesperoyucca whipplei)
Synonym
Yucca whipplei subsp. percursa
(Under Hesperoyucca whipplei)
Synonym
Yucca whipplei var. caespitosa
(Under Hesperoyucca whipplei)
Synonym
Yucca whipplei var. intermedia
(Under Hesperoyucca whipplei)
Synonym
Yucca whipplei var. parishii
(Under Hesperoyucca whipplei)
Synonym
Yucca whipplei var. percursa
(Under Hesperoyucca whipplei)
Synonym
ZannichelliaHORNED-PONDWEED
Zannichellia palustrisNative
ZannichelliaceaeHORNED-PONDWEED FAMILY
Zantedeschia
Zantedeschia aethiopicaCALLA-LILYNaturalized
Zauschneria californica subsp. californica
(Under Epilobium canum subsp. canum)
Synonym
Zauschneria californica subsp. latifolia
(Under Epilobium canum subsp. latifolium)
Synonym
Zauschneria cana
(Under Epilobium canum subsp. canum)
Synonym
Zauschneria latifolia var. garrettii
(Under Epilobium canum subsp. garrettii)
Synonym
Zauschneria septentrionalis
(Under Epilobium septentrionale)
Synonym
Zeltnera
  ↳  Key to Zeltnera
CENTAURY
Zeltnera abramsii
(Under Zeltnera venusta)
Synonym
Zeltnera arizonicaARIZONA CENTAURYNative
Zeltnera davyiDAVY'S CENTAURYNative
Zeltnera exaltataTALL CENTAURY, DESERT CENTAURYNative
Zeltnera muehlenbergiiMONTEREY CENTAURYNative
Zeltnera namophilaSPRING-LOVING CENTAURYNative
Zeltnera trichanthaALKALI CENTAURYNative
Zeltnera venustaCALIFORNIA CENTAURY, CHARMING CENTAURYNative
Zigadenus brevibracteatus
(Under Toxicoscordion brevibracteatum)
Synonym
Zigadenus exaltatus
(Under Toxicoscordion exaltatum)
Synonym
Zigadenus fontanus
(Under Toxicoscordion fontanum)
Synonym
Zigadenus fremontii
(Under Toxicoscordion fremontii)
Synonym
Zigadenus fremontii var. inezianus
(Under Toxicoscordion fremontii)
Synonym
Zigadenus fremontii var. minor
(Under Toxicoscordion fremontii)
Synonym
Zigadenus fremontii var. salsus
(Under Toxicoscordion fremontii)
Synonym
Zigadenus micranthus
(Under Toxicoscordion micranthum)
Synonym
Zigadenus micranthus var. fontanus
(Under Toxicoscordion fontanum)
Synonym
Zigadenus micranthus var. micranthus
(Under Toxicoscordion micranthum)
Synonym
Zigadenus paniculatus
(Under Toxicoscordion paniculatum)
Synonym
Zigadenus venenosus var. venenosus
(Under Toxicoscordion venenosum var. venenosum)
Synonym
ZingiberaceaeGINGER FAMILY
ZizaniaWILD RICE
Zizania aquatica var. angustifolia
(Under Zizania palustris var. interior)
Synonym
Zizania palustris var. interiorINTERIOR WILD RICE, NORTHERN WILD RICEWaif
Ziziphus
  ↳  Key to Ziziphus
Ziziphus jujuba
(Under Ziziphus zizyphus)
Synonym
Ziziphus obtusifolia var. canescensGRAYTHORNNative
Ziziphus parryi var. parryiPARRY'S JUJUBENative
Ziziphus zizyphusJUJUBENaturalized
Zostera
  ↳  Key to Zostera
EEL-GRASS
Zostera asiatica
(Under Zostera pacifica)
Synonym
Zostera japonicaNaturalized
Zostera marinaNative
Zostera marina var. latifolia
(Under Zostera marina)
Synonym
Zostera pacificaNative
Zosteraceae
  ↳  Key to Zosteraceae
EEL-GRASS FAMILY
Zosterella dubia
(Under Heteranthera dubia)
Synonym
Zygophyllaceae
  ↳  Key to Zygophyllaceae
CALTROP FAMILY
ZygophyllumBEAN-CAPER
Zygophyllum fabagoNaturalized
Zygophyllum fabago var. brachycarpum
(Under Zygophyllum fabago)
Synonym

Please use this Google Form for Contact/Feedback