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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 (tjm2)
Raillardiopsis scabrida
(Under Anisocarpus scabridus)
Synonym (tjm2)
Ranunculaceae
  ↳  Key to Ranunculaceae
BUTTERCUP FAMILY
Ranunculus
  ↳  Key to Ranunculus
BUTTERCUP
Ranunculus acrisWaif
Ranunculus alceus
(Under Ranunculus occidentalis var. ultramontanus)
Synonym (tjm2)
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 (tjm2)
Ranunculus andersoniiNative
Ranunculus aquatilisNative
Ranunculus aquatilis var. aquatilisNative
Ranunculus aquatilis var. capillaceus
(Under Ranunculus aquatilis var. diffusus)
Synonym (tjm2)
Ranunculus aquatilis var. diffususNative
Ranunculus aquatilis var. harrisii
(Under Ranunculus aquatilis var. diffusus)
Synonym (tjm2)
Ranunculus aquatilis var. hispidulus
(Under Ranunculus aquatilis var. aquatilis)
Synonym (tjm2)
Ranunculus aquatilis var. longirostris
(Under Ranunculus aquatilis var. diffusus)
Synonym (tjm2)
Ranunculus aquatilis var. subrigidus
(Under Ranunculus aquatilis var. diffusus)
Synonym (tjm2)
Ranunculus aquatilus, orth. var.
(Under Ranunculus aquatilis)
Synonym (tjm2)
Ranunculus arvensisNaturalized
Ranunculus bonariensis var. trisepalusNative
Ranunculus bongardii
(Under Ranunculus uncinatus)
Synonym (tjm2)
Ranunculus bulbosusWaif
Ranunculus californicusNative
Ranunculus californicus var. austromontanus
(Under Ranunculus californicus var. californicus)
Synonym (tjm2)
Ranunculus californicus var. californicusNative
Ranunculus californicus var. cuneatusNative
Ranunculus californicus var. gratus
(Under Ranunculus californicus var. californicus)
Synonym (tjm2)
Ranunculus californicus var. rugulosus
(Under Ranunculus californicus var. californicus)
Synonym (tjm2)
Ranunculus canusNative
Ranunculus canus var. canusNative
Ranunculus canus var. ludovicianusNative
Ranunculus circinatus var. subrigidus
(Under Ranunculus aquatilis var. diffusus)
Synonym (tjm2)
Ranunculus cymbalariaNative
Ranunculus cymbalaria var. saximontanus
(Under Ranunculus cymbalaria)
Synonym (tjm2)
Ranunculus delphinifolius
(Under Ranunculus flabellaris)
Synonym (tjm2)
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 (tjm2)
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 (tjm2)
Ranunculus lobbiiLOBB'S AQUATIC BUTTERCUPNative
Ranunculus longirostris
(Under Ranunculus aquatilis var. diffusus)
Synonym (tjm2)
Ranunculus macouniiMACOUN'S BUTTERCUPNative
Ranunculus minimus
(Under Myosurus minimus)
Synonym (tjm2)
Ranunculus muricatusNaturalized
Ranunculus occidentalisNative
Ranunculus occidentalis var. alceus
(Under Ranunculus occidentalis var. ultramontanus)
Synonym (tjm2)
Ranunculus occidentalis var. dissectusNative
Ranunculus occidentalis var. eisenii
(Under Ranunculus occidentalis var. occidentalis)
Synonym (tjm2)
Ranunculus occidentalis var. howelliiNative
Ranunculus occidentalis var. occidentalisNative
Ranunculus occidentalis var. rattanii
(Under Ranunculus occidentalis var. occidentalis)
Synonym (tjm2)
Ranunculus occidentalis var. ultramontanusNative
Ranunculus orthorhynchusNative
Ranunculus orthorhynchus subsp. platyphyllus
(Under Ranunculus orthorhynchus var. platyphyllus)
Synonym (tjm2)
Ranunculus orthorhynchus var. bloomeriNative
Ranunculus orthorhynchus var. hallii
(Under Ranunculus orthorhynchus var. orthorhynchus)
Synonym (tjm2)
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 (tjm2)
Ranunculus testiculatusNaturalized
Ranunculus trichophyllus
(Under Ranunculus aquatilis var. diffusus)
Synonym (tjm2)
Ranunculus trichophyllus var. trichophyllus
(Under Ranunculus aquatilis var. diffusus)
Synonym (tjm2)
Ranunculus trilobusExtirpated waif
Ranunculus uncinatusNative
Ranunculus uncinatus var. parviflorus
(Under Ranunculus uncinatus)
Synonym (tjm2)
Raphanus
  ↳  Key to Raphanus
Raphanus raphanistrumJOINTED CHARLOCKNaturalized
Raphanus sativusRADISHNaturalized
RapistrumWILD TURNIP
Rapistrum rugosumNaturalized
RatibidaPRAIRIE CONE-FLOWER
Ratibida columnaris var. pulcherrima
(Under Ratibida columnifera)
Synonym (tjm2)
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 (tjm2)
Reynoutria baldschuanica
(Under Fallopia baldschuanica)
Synonym (tjm2)
Reynoutria convolvulus
(Under Fallopia convolvulus)
Synonym (tjm2)
Reynoutria japonica
(Under Fallopia japonica)
Synonym (tjm2)
Reynoutria sachalinensis
(Under Fallopia sachalinensis)
Synonym (tjm2)
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 (tjm2)
Rhamnus californica
(Under Frangula californica)
Synonym (tjm2)
Rhamnus californica subsp. californica
(Under Frangula californica subsp. californica)
Synonym (tjm2)
Rhamnus californica subsp. crassifolia
(Under Frangula californica subsp. crassifolia)
Synonym (tjm2)
Rhamnus californica subsp. cuspidata
(Under Frangula californica subsp. cuspidata)
Synonym (tjm2)
Rhamnus californica subsp. occidentalis
(Under Frangula californica subsp. occidentalis)
Synonym (tjm2)
Rhamnus californica subsp. tomentella
(Under Frangula californica subsp. tomentella)
Synonym (tjm2)
Rhamnus californica subsp. ursina
(Under Frangula californica subsp. ursina)
Synonym (tjm2)
Rhamnus californica var. crassifolia
(Under Frangula californica subsp. crassifolia)
Synonym (tjm2)
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 (tjm2)
Rhamnus californica var. occidentalis
(Under Frangula californica subsp. occidentalis)
Synonym (tjm2)
Rhamnus californica var. rubra
(Under Frangula rubra)
Synonym
Rhamnus californica var. tomentella
(Under Frangula californica subsp. tomentella)
Synonym (tjm2)
Rhamnus californica var. ursina
(Under Frangula californica subsp. ursina)
Synonym (tjm2)
Rhamnus californica var. viridula
(Under Frangula californica subsp. cuspidata)
Synonym (tjm2)
Rhamnus catalinae
(Under Rhamnus pirifolia)
Synonym (tjm2)
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 crocea)
Mentioned in
a note
Rhamnus crocea subsp. ilicifolia
(Under Rhamnus ilicifolia)
Synonym
Rhamnus crocea subsp. pilosa
(Under Rhamnus crocea)
Mentioned in
a note
Rhamnus crocea subsp. pilosa
(Under Rhamnus pilosa)
Synonym (tjm2)
Rhamnus crocea subsp. pirifolia
(Under Rhamnus crocea)
Mentioned in
a note
Rhamnus crocea subsp. pirifolia
(Under Rhamnus pirifolia)
Synonym (tjm2)
Rhamnus crocea var. ilicifolia
(Under Rhamnus ilicifolia)
Synonym
Rhamnus crocea var. insularis
(Under Rhamnus pirifolia)
Synonym (tjm2)
Rhamnus crocea var. pilosa
(Under Rhamnus pilosa)
Synonym (tjm2)
Rhamnus crocea var. pirifolia
(Under Rhamnus pirifolia)
Synonym (tjm2)
Rhamnus cuspidata
(Under Frangula californica subsp. cuspidata)
Synonym (tjm2)
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 (tjm2)
Rhamnus occidentalis
(Under Frangula californica subsp. occidentalis)
Synonym (tjm2)
Rhamnus pilosaNative
Rhamnus pirifoliaISLAND REDBERRYNative
Rhamnus purshiana
(Under Frangula purshiana)
Synonym (tjm2)
Rhamnus purshiana subsp. purshiana
(Under Frangula purshiana subsp. purshiana)
Synonym (tjm2)
Rhamnus purshiana var. annonifolia
(Under Frangula purshiana subsp. annonifolia)
Synonym (tjm2)
Rhamnus purshiana var. purshiana
(Under Frangula purshiana subsp. purshiana)
Synonym (tjm2)
Rhamnus rubra
(Under Frangula rubra)
Synonym (tjm2)
Rhamnus rubra subsp. modocensis
(Under Frangula rubra subsp. modocensis)
Synonym (tjm2)
Rhamnus rubra subsp. obtusissima
(Under Frangula rubra subsp. obtusissima)
Synonym (tjm2)
Rhamnus rubra subsp. rubra
(Under Frangula rubra subsp. rubra)
Synonym (tjm2)
Rhamnus rubra subsp. yosemitana
(Under Frangula rubra subsp. yosemitana)
Synonym (tjm2)
Rhamnus rubra var. modocensis
(Under Frangula rubra subsp. modocensis)
Synonym (tjm2)
Rhamnus rubra var. obtusissima
(Under Frangula rubra subsp. obtusissima)
Synonym (tjm2)
Rhamnus rubra var. yosemitana
(Under Frangula rubra subsp. yosemitana)
Synonym (tjm2)
Rhamnus tomentella
(Under Frangula californica)
Mentioned in
a note
Rhamnus tomentella
(Under Frangula californica subsp. tomentella)
Synonym (tjm2)
Rhamnus tomentella subsp. crassifolia
(Under Frangula californica subsp. crassifolia)
Synonym (tjm2)
Rhamnus tomentella subsp. cuspidata
(Under Frangula californica subsp. cuspidata)
Synonym (tjm2)
Rhamnus tomentella subsp. tomentella
(Under Frangula californica subsp. tomentella)
Synonym (tjm2)
Rhamnus tomentella subsp. ursina
(Under Frangula californica subsp. ursina)
Synonym (tjm2)
Rhamnus tomentella var. ursina
(Under Frangula californica subsp. ursina)
Synonym (tjm2)
Rhamnus ursina
(Under Frangula californica subsp. ursina)
Synonym (tjm2)
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 (tjm2)
Rhus aromatica var. simplicifolia
(Under Rhus aromatica)
Synonym (tjm2)
Rhus aromatica var. trilobata
(Under Rhus aromatica)
Synonym (tjm2)
Rhus diversiloba
(Under Toxicodendron diversilobum)
Synonym (tjm2)
Rhus glabra
(Under Rhus)
Mentioned in
a note
Rhus integrifoliaLEMONADE BERRYNative
Rhus lancea
(Under Searsia lancea)
Synonym (tjm2)
Rhus laurina
(Under Malosma laurina)
Synonym (tjm2)
Rhus ovataSUGAR BUSHNative
Rhus trilobata
(Under Rhus aromatica)
Synonym (tjm2)
Rhus trilobata var. anisophylla
(Under Rhus aromatica)
Synonym (tjm2)
Rhus trilobata var. malacophylla
(Under Rhus aromatica)
Synonym (tjm2)
Rhus trilobata var. quinata
(Under Rhus aromatica)
Synonym (tjm2)
Rhus trilobata var. simplicifolia
(Under Rhus aromatica)
Synonym (tjm2)
Rhus trilobata var. trilobata
(Under Rhus aromatica)
Synonym (tjm2)
Rhus typhina
(Under Rhus)
Mentioned in
a note
Rhynchelytrum repens
(Under Melinis repens subsp. repens)
Synonym (tjm2)
Rhynchelytrum roseum
(Under Melinis repens subsp. repens)
Synonym (tjm2)
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 (tjm2)
Rhynchospora glomerata var. capitellata
(Under Rhynchospora capitellata)
Synonym (tjm2)
Rhynchospora glomerata var. minor
(Under Rhynchospora capitellata)
Synonym (tjm2)
Rhynchospora kunthii
(Under Rhynchospora)
Mentioned in
a note
Rhynchospora recognita
(Under Rhynchospora)
Mentioned in
a note
Rhynchospora recognita
(Under Rhynchospora globularis)
Synonym (tjm2)
Ribes
  ↳  Key to Ribes
CURRANT, GOOSEBERRY
Ribes amarumBITTER GOOSEBERRYNative
Ribes amarum var. hoffmannii
(Under Ribes amarum)
Synonym (tjm2)
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 (tjm2)
Ribes divaricatumNative
Ribes divaricatum var. divaricatum
(Under Ribes divaricatum)
Mentioned in
a note
Ribes divaricatum var. inerme
(Under Ribes inerme var. inerme)
Synonym (tjm2)
Ribes divaricatum var. klamathense
(Under Ribes inerme var. klamathense)
Synonym (tjm2)
Ribes divaricatum var. parishiiPARISH'S GOOSEBERRYNative
Ribes divaricatum var. pubiflorumSTRAGGLE BUSHNative
Ribes glanduliferum
(Under Ribes velutinum)
Synonym (tjm2)
Ribes glutinosum
(Under Ribes sanguineum var. glutinosum)
Synonym (tjm2)
Ribes hallii
(Under Ribes viscosissimum)
Synonym (tjm2)
Ribes hudsonianum var. petiolareWESTERN BLACK CURRANTNative
Ribes indecorumWHITE-FLOWERING CURRANTNative
Ribes inebrians
(Under Ribes cereum var. inebrians)
Synonym (tjm2)
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 (tjm2)
Ribes leptanthum var. quercetorum
(Under Ribes quercetorum)
Synonym (tjm2)
Ribes lobbiiGUMMY GOOSEBERRYNative
Ribes malvaceumCHAPARRAL CURRANTNative
Ribes malvaceum var. clementinum
(Under Ribes malvaceum var. malvaceum)
Synonym (tjm2)
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 (tjm2)
Ribes menziesii var. hystriculum
(Under Ribes menziesii var. menziesii)
Synonym (tjm2)
Ribes menziesii var. hystrix
(Under Ribes menziesii var. menziesii)
Synonym (tjm2)
Ribes menziesii var. ixodermeAROMATIC CANYON GOOSEBERRYNative
Ribes menziesii var. leptosmum
(Under Ribes menziesii var. menziesii)
Synonym (tjm2)
Ribes menziesii var. menziesiiNative
Ribes menziesii var. minus
(Under Ribes victoris)
Synonym (tjm2)
Ribes menziesii var. retineatum
(Under Ribes menziesii var. menziesii)
Synonym (tjm2)
Ribes menziesii var. senile
(Under Ribes menziesii var. menziesii)
Synonym (tjm2)
Ribes menziesii var. thacherianum
(Under Ribes thacherianum)
Synonym (tjm2)
Ribes montigenumWESTERN PRICKLY GOOSEBERRYNative
Ribes nevadenseMOUNTAIN PINK CURRANTNative
Ribes nevadense var. glaucescens
(Under Ribes nevadense)
Synonym (tjm2)
Ribes nevadense var. jaegeri
(Under Ribes nevadense)
Synonym (tjm2)
Ribes petiolare
(Under Ribes hudsonianum var. petiolare)
Synonym (tjm2)
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 (tjm2)
Ribes sanguineum var. glutinosumNative
Ribes sanguineum var. melanocarpum
(Under Ribes sanguineum var. glutinosum)
Synonym (tjm2)
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 (tjm2)
Ribes velutinum var. gooddingii
(Under Ribes velutinum)
Synonym (tjm2)
Ribes viburnifoliumSANTA CATALINA ISLAND CURRANTNative
Ribes victorisVICTOR'S GOOSEBERRYNative
Ribes victoris var. minus
(Under Ribes victoris)
Synonym (tjm2)
Ribes viscosissimumSTICKY CURRANTNative
Ribes viscosissimum var. hallii
(Under Ribes viscosissimum)
Synonym (tjm2)
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 (tjm2)
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 (tjm2)
Rorippa curvipes var. truncata
(Under Rorippa curvipes)
Synonym (tjm2)
Rorippa curvisiliquaNative
Rorippa curvisiliqua var. curvisiliqua
(Under Rorippa curvisiliqua)
Synonym (tjm2)
Rorippa curvisiliqua var. occidentalis
(Under Rorippa curvisiliqua)
Synonym (tjm2)
Rorippa curvisiliqua var. orientalis
(Under Rorippa curvisiliqua)
Synonym (tjm2)
Rorippa curvisiliqua var. procumbens
(Under Rorippa curvisiliqua)
Synonym (tjm2)
Rorippa gambelii
(Under Nasturtium gambelii)
Synonym (tjm2)
Rorippa nasturtium-aquaticum
(Under Nasturtium officinale)
Synonym (tjm2)
Rorippa palustrisNative
Rorippa palustris subsp. fernaldiana
(Under Rorippa palustris subsp. palustris)
Synonym (tjm2)
Rorippa palustris subsp. hispidaNative
Rorippa palustris subsp. occidentalis
(Under Rorippa palustris subsp. palustris)
Synonym (tjm2)
Rorippa palustris subsp. palustrisNative
Rorippa palustris var. fernaldiana
(Under Rorippa palustris subsp. palustris)
Synonym (tjm2)
Rorippa palustris var. hispida
(Under Rorippa palustris subsp. hispida)
Synonym (tjm2)
Rorippa palustris var. occidentalis
(Under Rorippa palustris subsp. palustris)
Synonym (tjm2)
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 (tjm2)
Rosa eglanteria
(Under Rosa rubiginosa)
Synonym (tjm2)
Rosa granulata
(Under Rosa spithamea)
Mentioned in
a note
Rosa gymnocarpaWOOD ROSENative
Rosa gymnocarpa var. gymnocarpaNative
Rosa gymnocarpa var. pubescens
(Under Rosa bridgesii)
Synonym (tjm2)
Rosa gymnocarpa var. serpentinaGASQUET ROSENative
Rosa minutifoliaSMALL-LEAVED ROSENative
Rosa mohavensis
(Under Rosa woodsii var. glabrata)
Synonym (tjm2)
Rosa multifloraMULTIFLORA ROSANaturalized
Rosa nutkanaNative
Rosa nutkana subsp. macdougaliiNative
Rosa nutkana subsp. nutkanaNOOTKA ROSENative
Rosa nutkana var. muriculata
(Under Rosa nutkana subsp. nutkana)
Synonym (tjm2)
Rosa nutkana var. nutkana
(Under Rosa nutkana subsp. nutkana)
Synonym (tjm2)
Rosa nutkana var. setosa
(Under Rosa nutkana subsp. nutkana)
Synonym (tjm2)
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 (tjm2)
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 (tjm2)
Rosa woodsii var. woodsii
(Under Rosa woodsii)
Mentioned in
a note
Rosa yainacensis
(Under Rosa bridgesii)
Synonym (tjm2)
Rosaceae
  ↳  Key to Rosaceae
ROSE FAMILY
Rostraria cristata
(Under Koeleria gerardi)
Synonym (tjm2)
Rotala
  ↳  Key to Rotala
Rotala catholica
(Under Rotala ramosior)
Synonym (tjm2)
Rotala dentifera
(Under Rotala ramosior)
Synonym (tjm2)
Rotala indicaNaturalized
Rotala ramosiorNative
Rottboellia cochinchinensis
(Under Poaceae)
Mentioned in
a note
Rottboellia cylindrica
(Under Hainardia cylindrica)
Synonym (tjm2)
Rubacer parviflorum
(Under Rubus parviflorus)
Synonym (tjm2)
Rubiaceae
  ↳  Key to Rubiaceae
MADDER FAMILY
Rubus
  ↳  Key to Rubus
Rubus almus
(Under Rubus pensilvanicus)
Synonym (tjm2)
Rubus armeniacusHIMALAYAN BLACKBERRYNaturalized
Rubus bernardinus
(Under Rubus leucodermis)
Synonym (tjm2)
Rubus discolor
(Under Rubus armeniacus)
Synonym (tjm2)
Rubus eastwoodianus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus franciscanus
(Under Rubus spectabilis)
Synonym (tjm2)
Rubus ganderi
(Under Rubus glaucifolius)
Synonym (tjm2)
Rubus glaucifoliusWAXLEAF RASPBERRYNative
Rubus glaucifolius var. ganderi
(Under Rubus glaucifolius)
Synonym (tjm2)
Rubus inermis
(Under Rubus ulmifolius var. anoplothyrsus)
Synonym (tjm2)
Rubus laciniatusCUTLEAF BLACKBERRYNaturalized
Rubus lasiococcusROUGHFRUIT RASPBERRYNative
Rubus lemurum
(Under Rubus ursinus)
Synonym (tjm2)
Rubus leucodermisWHITEBARK RASPBERRYNative
Rubus leucodermis var. bernardinus
(Under Rubus leucodermis)
Synonym (tjm2)
Rubus leucodermis var. glaucifolius
(Under Rubus glaucifolius)
Synonym (tjm2)
Rubus leucodermis var. leucodermis
(Under Rubus leucodermis)
Synonym (tjm2)
Rubus leucodermis var. trinitatis
(Under Rubus leucodermis)
Synonym (tjm2)
Rubus macropetalus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus nivalisSNOW DWARF BRAMBLENative
Rubus nutkanus
(Under Rubus parviflorus)
Synonym (tjm2)
Rubus nutkanus var. bifarius
(Under Rubus parviflorus)
Synonym (tjm2)
Rubus nutkanus var. nuttallii
(Under Rubus parviflorus)
Synonym (tjm2)
Rubus nutkanus var. parviflorus
(Under Rubus parviflorus)
Synonym (tjm2)
Rubus nutkanus var. scopulorum
(Under Rubus parviflorus)
Synonym (tjm2)
Rubus parviflorusTHIMBLEBERRYNative
Rubus parviflorus var. bifarius
(Under Rubus parviflorus)
Synonym (tjm2)
Rubus parviflorus var. hypomalacus
(Under Rubus parviflorus)
Synonym (tjm2)
Rubus parviflorus var. velutinus
(Under Rubus parviflorus)
Synonym (tjm2)
Rubus pensilvanicusNaturalized
Rubus sirbenus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus spectabilisSALMONBERRYNative
Rubus spectabilis var. franciscanus
(Under Rubus spectabilis)
Synonym (tjm2)
Rubus spectabilis var. menziesii
(Under Rubus spectabilis)
Synonym (tjm2)
Rubus stenopetalus
(Under Rubus spectabilis)
Synonym (tjm2)
Rubus titanus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus trinitatis
(Under Rubus leucodermis)
Synonym (tjm2)
Rubus ulmifoliusELMLEAF BLACKBERRYNaturalized
Rubus ulmifolius var. anoplothyrsusNaturalized
Rubus ulmifolius var. inermis
(Under Rubus ulmifolius var. anoplothyrsus)
Synonym (tjm2)
Rubus ulmifolius var. ulmifoliusNaturalized
Rubus ursinusCALIFORNIA BLACKBERRYNative
Rubus ursinus subsp. macropetalus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus ursinus var. eastwoodianus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus ursinus var. macropetalus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus ursinus var. medusae
(Under Rubus ursinus)
Synonym (tjm2)
Rubus ursinus var. pentaphyllus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus ursinus var. sirbenus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus ursinus var. vitifolius
(Under Rubus ursinus)
Synonym (tjm2)
Rubus velutinus
(Under Rubus parviflorus)
Synonym (tjm2)
Rubus vitifolius
(Under Rubus ursinus)
Synonym (tjm2)
Rubus vitifolius subsp. ursinus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus vitifolius var. eastwoodianus
(Under Rubus ursinus)
Synonym (tjm2)
Rubus vitifolius var. titanus
(Under Rubus ursinus)
Synonym (tjm2)
Rudbeckia
  ↳  Key to Rudbeckia
CONE-FLOWER
Rudbeckia californicaCALIFORNIA CONE-FLOWERNative
Rudbeckia californica var. glauca
(Under Rudbeckia glaucescens)
Synonym (tjm2)
Rudbeckia californica var. intermedia
(Under Rudbeckia klamathensis)
Synonym (tjm2)
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 (tjm2)
Rumex britannicaNative
Rumex californicusNative
Rumex conglomeratusNaturalized
Rumex crassusNative
Rumex crispusCURLY DOCKNaturalized
Rumex dentatusNaturalized
Rumex dentatus subsp. klotzschianus
(Under Rumex dentatus)
Synonym (tjm2)
Rumex fenestratus
(Under Rumex occidentalis)
Synonym (tjm2)
Rumex fueginusGOLDEN DOCKNative
Rumex hymenosepalusCANAIGRE, WILD-RHUBARBNative
Rumex kerneriNaturalized
Rumex lacustrisNative
Rumex maritimus
(Under Rumex fueginus)
Synonym (tjm2)
Rumex obtusifoliusBITTER DOCKNaturalized
Rumex obtusifolius subsp. agrestis
(Under Rumex obtusifolius)
Synonym (tjm2)
Rumex occidentalisWESTERN DOCKNative
Rumex orbiculatus
(Under Rumex britannica)
Synonym (tjm2)
Rumex orbiculatus var. orbiculatus
(Under Rumex britannica)
Synonym (tjm2)
Rumex palustrisHistorical waif
Rumex paucifoliusNative
Rumex paucifolius var. gracilescens
(Under Rumex paucifolius)
Synonym (tjm2)
Rumex persicarioidesNative
Rumex pulcherFIDDLE DOCKNaturalized
Rumex salicifoliusWILLOW DOCKNative
Rumex salicifolius var. crassus
(Under Rumex crassus)
Synonym (tjm2)
Rumex salicifolius var. denticulatus
(Under Rumex californicus)
Synonym (tjm2)
Rumex salicifolius var. lacustris
(Under Rumex lacustris)
Synonym (tjm2)
Rumex salicifolius var. salicifolius
(Under Rumex salicifolius)
Synonym (tjm2)
Rumex salicifolius var. transitorius
(Under Rumex transitorius)
Synonym (tjm2)
Rumex salicifolius var. triangulivalvis
(Under Rumex triangulivalvis)
Synonym (tjm2)
Rumex stenophyllusNaturalized
Rumex transitoriusNative
Rumex triangulivalvisNative
Rumex utahensisNative
Rumex venosusWINGED DOCKNative
Rumex violascensNative
Rupalleya volubilis
(Under Dichelostemma volubile)
Synonym (tjm2)
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 (tjm2)
Ruppia spiralis
(Under Ruppia cirrhosa)
Synonym (tjm2)
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 (tjm2)
Rytidosperma caespitosumNaturalized
Rytidosperma penicillatumHAIRY OAT GRASS, POVERTY GRASSNaturalized
Rytidosperma racemosumNaturalized
Rytidosperma richardsonii
(Under Rytidosperma)
Mentioned in
a note