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Key to families Table of families and genera
  Index to accepted names and synonyms:
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Scientific Name

Index Page: R

Scientific NameCommon Name
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)
Synonym
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)
Synonym
Rhamnus californica var. obtusissima
(Under Frangula rubra)
Synonym
Rhamnus californica var. obtusissima
(Under Frangula rubra subsp. obtusissima)
Synonym
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 cathartica
(Under Rhamnus)
Mentioned in
a note
Rhamnus croceaSPINY REDBERRYNative
Rhamnus crocea subsp. crocea
(Under Rhamnus crocea)
Mentioned in
a note
Rhamnus crocea subsp. ilicifolia
(Under Rhamnus ilicifolia)
Synonym
Rhamnus crocea subsp. ilicifolia
(Under Rhamnus crocea)
Mentioned in
a note
Rhamnus crocea subsp. pilosa
(Under Rhamnus pilosa)
Synonym
Rhamnus crocea subsp. pilosa
(Under Rhamnus crocea)
Mentioned in
a note
Rhamnus crocea subsp. pirifolia
(Under Rhamnus pirifolia)
Synonym
Rhamnus crocea subsp. pirifolia
(Under Rhamnus crocea)
Mentioned in
a note
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 insula
(Under Rhamnus crocea)
Mentioned in
a note
Rhamnus insula
(Under Rhamnus ilicifolia)
Mentioned in
a note
Rhamnus insula subsp. insula
(Under Rhamnus crocea)
Mentioned in
a note
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
(Under Frangula californica)
Mentioned in
a note
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
Rhamnus ursina
(Under Frangula californica subsp. ursina)
Synonym
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 glabra
(Under Rhus)
Mentioned in
a note
Rhus integrifoliaLEMONADE BERRYNative
Rhus lancea
(Under Searsia lancea)
Synonym
Rhus laurina
(Under Malosma laurina)
Synonym
Rhus ovataSUGAR BUSHNative
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
Rhus typhina
(Under Rhus)
Mentioned in
a note
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 kunthii
(Under Rhynchospora)
Mentioned in
a note
Rhynchospora recognita
(Under Rhynchospora globularis)
Synonym
Rhynchospora recognita
(Under Rhynchospora)
Mentioned in
a note
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. divaricatum
(Under Ribes divaricatum)
Mentioned in
a note
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
(Under Ribes lasianthum)
Mentioned in
a note
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 hispida
(Under Robinia)
Mentioned in
a note
Robinia neomexicanaNEW MEXICO LOCUSTNative
Robinia pseudoacaciaBLACK LOCUSTNaturalized
Romanzoffia
  ↳  Key to Romanzoffia
Romanzoffia californicaNative
Romanzoffia sitchensisNative
Romanzoffia tracyiTRACY'S ROMANZOFFIANative
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 brownii
(Under Rosa nutkana subsp. macdougalii)
Mentioned in
a note
Rosa californicaCALIFORNIA ROSENative
Rosa caninaDOG ROSENaturalized
Rosa crenulata
(Under Rosa bridgesii)
Synonym
Rosa eglanteria
(Under Rosa rubiginosa)
Synonym
Rosa granulata
(Under Rosa spithamea)
Mentioned in
a note
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. arizonica
(Under Rosa woodsii)
Mentioned in
a note
Rosa woodsii subsp. gratissimaMOJAVE ROSENative
Rosa woodsii subsp. puberulenta
(Under Rosa woodsii)
Mentioned in
a note
Rosa woodsii subsp. ultramontanaINTERIOR ROSENative
Rosa woodsii var. glabrataNative
Rosa woodsii var. gratissimaNative
Rosa woodsii var. ultramontana
(Under Rosa woodsii subsp. ultramontana)
Synonym
Rosa woodsii var. woodsii
(Under Rosa woodsii)
Mentioned in
a note
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 cochinchinensis
(Under Poaceae (Gramineae))
Mentioned in
a note
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)
Synonym
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 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)
Synonym
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
RuppiaceaeDITCH-GRASS FAMILY
Ruscaceae
  ↳  Key to Ruscaceae
BUTCHER'S-BROOM FAMILY
RutaRUE
Ruta chalepensisNaturalized
Ruta graveolens
(Under Ruta chalepensis)
Mentioned in
a note
Rutaceae
  ↳  Key to Rutaceae
RUE FAMILY
Rytidosperma
  ↳  Key to Rytidosperma
Rytidosperma biannulare
(Under Rytidosperma)
Mentioned in
a note
Rytidosperma caespitosa
(Under Rytidosperma caespitosum)
Synonym
Rytidosperma caespitosumNaturalized
Rytidosperma penicillatumHAIRY OAT GRASS, POVERTY GRASSNaturalized
Rytidosperma racemosumNaturalized
Rytidosperma richardsonii
(Under Rytidosperma)
Mentioned in
a note