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Key to families Table of families and genera
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Scientific Name

Index Page: P

Scientific NameCommon Name
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 clevelandii
(Under Packera clevelandii)
Synonym (tjm2)
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)
Synonym (tjm2)
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. acuminatum
(Under Panicum acuminatum)
Mentioned in
a note
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 (tjm2)
Panicum dichotomiflorum subsp. dichotomiflorumFALL PANIC GRASSNaturalized
Panicum dichotomiflorum var. dichotomiflorum
(Under Panicum dichotomiflorum subsp. dichotomiflorum)
Synonym (tjm2)
Panicum hillmaniiHILLMAN'S PANIC GRASSNaturalized
Panicum hirticaule subsp. hirticauleROUGHSTALK WITCH GRASSNative
Panicum hirticaule var. hirticaule
(Under Panicum hirticaule subsp. hirticaule)
Synonym (tjm2)
Panicum huachucae
(Under Panicum acuminatum var. fasciculatum)
Synonym (tjm2)
Panicum lassenianum
(Under Panicum acuminatum var. thermale)
Synonym (tjm2)
Panicum lindheimeri
(Under Panicum acuminatum var. lindheimeri)
Synonym (tjm2)
Panicum miliaceum subsp. miliaceumBROOM CORN MILLETNaturalized
Panicum occidentale
(Under Panicum acuminatum var. fasciculatum)
Synonym (tjm2)
Panicum oligosanthes var. oligosanthes
(Under Panicum oligosanthes var. scribnerianum)
Mentioned in
a note
Panicum oligosanthes var. scribnerianumSCRIBNER'S PANIC GRASSNative
Panicum pacificum
(Under Panicum acuminatum var. fasciculatum)
Synonym (tjm2)
Panicum rigidulum subsp. rigidulumREDTOP PANICUMNaturalized
Panicum rigidulum var. rigidulum
(Under Panicum rigidulum subsp. rigidulum)
Synonym (tjm2)
Panicum scribnerianum
(Under Panicum oligosanthes var. scribnerianum)
Synonym (tjm2)
Panicum thermale
(Under Panicum acuminatum var. thermale)
Synonym (tjm2)
Panicum urvilleanumSILKY PANIC GRASSNative
Papaver
  ↳  Key to Papaver
Papaver apulum var. micranthum
(Under Papaver hybridum)
Synonym
Papaver argemoneWaif
Papaver californicumFIRE POPPYNative
Papaver dubium
(Under Papaver)
Mentioned in
a note
Papaver heterophyllumWIND POPPYNative
Papaver hybridumROUGH POPPYNaturalized
Papaver lemmonii
(Under Papaver californicum)
Synonym (tjm2)
Papaver rhoeasCORN POPPYNaturalized
Papaver somniferumOPIUM POPPYWaif
Papaveraceae
  ↳  Key to Papaveraceae
POPPY FAMILY
Pappostipa speciosa
(Under Stipa speciosa)
Synonym (tjm2)
Paragymnopteris marantae
(Under Pellaea breweri)
Mentioned in
a note
Paragymnopteris sargentii
(Under Pellaea breweri)
Mentioned in
a note
Parapholis
  ↳  Key to Parapholis
SICKLE GRASS
Parapholis incurvaNaturalized
Parapholis strigosaNaturalized
Paraserianthes lophantha
(Under Albizia lophantha)
Synonym (tjm2)
Parathelypteris nevadensis
(Under Thelypteris nevadensis)
Synonym (tjm2)
Parentucellia
  ↳  Key to Parentucellia
Parentucellia latifoliaNaturalized
Parentucellia viscosaNaturalized
Parietaria
  ↳  Key to Parietaria
PELLITORY
Parietaria floridana
(Under Parietaria)
Mentioned in
a note
Parietaria hesperaNative
Parietaria hespera var. californicaNative
Parietaria hespera var. hesperaNative
Parietaria judaicaNaturalized
Parietaria pensylvanicaNative
Parishella californica
(Under Nemacladus)
Mentioned in
a note
Parishella californica
(Under Nemacladus californicus)
Synonym (tjm2)
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 (tjm2)
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 (tjm2)
Parnassia palustris var. montanensis
(Under Parnassia palustris)
Synonym (tjm2)
Parnassia palustris var. neogaea
(Under Parnassia palustris)
Synonym (tjm2)
Parnassia palustris var. parviflora
(Under Parnassia parviflora)
Synonym (tjm2)
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 (tjm2)
Parosela parryi
(Under Marina parryi)
Synonym (tjm2)
Parrya menziesii var. glabra
(Under Phoenicaulis cheiranthoides)
Synonym
ParthenocissusVIRGINIA CREEPER
Parthenocissus insertaWOODBINENaturalized
Parthenocissus vitacea
(Under Parthenocissus inserta)
Synonym (tjm2)
Parvisedum congdonii
(Under Sedella pumila)
Synonym (tjm2)
Parvisedum leiocarpum
(Under Sedella leiocarpa)
Synonym (tjm2)
Parvisedum pentandrum
(Under Sedella pentandra)
Synonym (tjm2)
Parvisedum pumilum
(Under Sedella pumila)
Synonym (tjm2)
Pascopyrum smithii
(Under Elymus smithii)
Synonym (tjm2)
Paspalum
  ↳  Key to Paspalum
Paspalum boscianum
(Under Paspalum)
Mentioned in
a note
Paspalum dilatatumDALLIS GRASSNaturalized
Paspalum distichumKNOT GRASSNative
Paspalum distichum var. indutum
(Under Paspalum distichum)
Synonym (tjm2)
Paspalum notatum
(Under Paspalum)
Mentioned in
a note
Paspalum paspalodes
(Under Paspalum distichum)
Synonym (tjm2)
Paspalum pubiflorum
(Under Poaceae)
Mentioned in
a note
Paspalum quadrifarium
(Under Poaceae)
Mentioned in
a note
Paspalum urvilleiNaturalized
Paspalum vaginatumSEASHORE PASPALUMNaturalized
Passiflora
  ↳  Key to Passiflora
PASSION FLOWER
Passiflora caeruleaBLUE PASSION FLOWERNaturalized
Passiflora mixta
(Under Passiflora tarminiana)
Mentioned in
a note
Passiflora mollissima
(Under Passiflora tarminiana)
Synonym (tjm2)
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
Pectis papposa var. papposaCHINCH-WEEDNative
Pectocarya
  ↳  Key to Pectocarya
PECTOCARYA, COMBSEED
Pectocarya heterocarpaMIXED-NUT PECTOCARYANative
Pectocarya linearis subsp. feroculaNARROW-TOOTHED PECTOCARYANative
Pectocarya penicillataNORTHERN PECTOCARYANative
Pectocarya peninsularisBAJA PECTOCARYANative
Pectocarya platycarpaWIDE-TOOTHED PECTOCARYANative
Pectocarya pusillaLITTLE PECTOCARYANative
Pectocarya recurvataARCHED-NUT PECTOCARYANative
Pectocarya setosaROUND-NUT PECTOCARYANative
Pedicularis
  ↳  Key to Pedicularis
LOUSEWORT
Pedicularis attollensLITTLE ELEPHANT'S HEADNative
Pedicularis aurantiaca
(Under Pedicularis densiflora)
Synonym
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 (tjm2)
Pedicularis crenulata subsp. candida
(Under Pedicularis crenulata)
Synonym (tjm2)
Pedicularis densifloraWARRIOR'S PLUMENative
Pedicularis densiflora subsp. aurantiaca
(Under Pedicularis densiflora)
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 racemosa subsp. alba
(Under Pedicularis racemosa)
Mentioned in
a note
Pedicularis semibarbataNative
Pedicularis semibarbata subsp. charlestonensis
(Under Pedicularis semibarbata)
Synonym (tjm2)
Pediomelum
  ↳  Key to Pediomelum
BREADROOT
Pediomelum californicumNative
Pediomelum castoreumBEAVER DAM BREADROOTNative
Pediomelum mephiticum
(Under Pediomelum)
Mentioned in
a note
PeganumHARMAL
Peganum harmalaAFRICAN RUE, SYRIAN RUENaturalized
Pelargonium
  ↳  Key to Pelargonium
GARDEN GERANIUM
Pelargonium
  ↳  Key to Pelargonium
FISH GERANIUMNaturalized
Pelargonium capitatumWaif
Pelargonium grossularioidesNaturalized
Pelargonium inquinansNaturalized
Pelargonium panduriformeOAK-LEAVED GERANIUMNaturalized
Pelargonium peltatumIVY GERANIUMWaif
Pelargonium quercifolium
(Under Pelargonium)
Mentioned in
a note
Pelargonium quercifolium
(Under Pelargonium)
Mentioned in
a note
Pelargonium vitifoliumWaif
Pelargonium zonaleHORSESHOE GERANIUMWaif
Pellaea
  ↳  Key to Pellaea
CLIFF-BRAKE
Pellaea andromedifoliaCOFFEE FERNNative
Pellaea andromedifolia var. pubescens
(Under Pellaea andromedifolia)
Mentioned in
a note
Pellaea andromedifolia var. rubens
(Under Pellaea andromedifolia)
Mentioned in
a note
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 (tjm2)
Peltandra
Peltandra virginicaGREEN ARROW ARUM, TUCKAHOEWaif
Peltiphyllum peltatum
(Under Darmera peltata)
Synonym (tjm2)
Pennisetum
  ↳  Key to Pennisetum
FOUNTAIN GRASS
Pennisetum advena
(Under Pennisetum setaceum)
Mentioned in
a note
Pennisetum ciliareBUFFEL GRASSNaturalized
Pennisetum clandestinumKIKUYU GRASSNaturalized
Pennisetum glaucum
(Under Pennisetum)
Mentioned in
a note
Pennisetum latifolium
(Under Pennisetum)
Mentioned in
a note
Pennisetum macrourum
(Under Pennisetum)
Mentioned in
a note
Pennisetum nervosum
(Under Pennisetum)
Mentioned in
a note
Pennisetum purpureum
(Under Pennisetum)
Mentioned in
a note
Pennisetum setaceumCRIMSON FOUNTAIN GRASSNaturalized
Pennisetum villosumFEATHERTOPNaturalized
Penstemon
  ↳  Key to Penstemon
BEARDTONGUE
Penstemon albomarginatusWHITE-MARGINED BEARDTONGUENative
Penstemon anguineusNative
Penstemon antirrhinoides subsp. microphyllus
(Under Keckiella antirrhinoides var. microphylla)
Mentioned in
a note
Penstemon austinii
(Under Penstemon floridus var. austinii)
Synonym (tjm2)
Penstemon azureusNative
Penstemon azureus subsp. angustissimus
(Under Penstemon azureus var. angustissimus)
Synonym (tjm2)
Penstemon azureus subsp. azureus
(Under Penstemon azureus var. azureus)
Synonym (tjm2)
Penstemon azureus var. angustissimusNative
Penstemon azureus var. azureusNative
Penstemon barnebyiBARNEBY'S BEARDTONGUENative
Penstemon bicolorNative
Penstemon bridgesii
(Under Penstemon rostriflorus)
Synonym (tjm2)
Penstemon bryantiae
(Under Penstemon palmeri var. palmeri)
Synonym
Penstemon caesiusNative
Penstemon calcareusLIMESTONE BEARDTONGUENative
Penstemon californicusCALIFORNIA BEARDTONGUENative
Penstemon centranthifoliusSCARLET BUGLERNative
Penstemon cinereus
(Under Penstemon humilis var. humilis)
Mentioned in
a note
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 (tjm2)
Penstemon confusus var. patens
(Under Penstemon patens)
Synonym (tjm2)
Penstemon cordifolius
(Under Keckiella cordifolia)
Synonym (tjm2)
Penstemon davidsonii
(Under Penstemon rupicola)
Mentioned in
a note
Penstemon davidsonii var. davidsoniiNative
Penstemon deustusHOT-ROCK PENSTEMONNative
Penstemon deustus subsp. heterander
(Under Penstemon deustus var. pedicellatus)
Synonym (tjm2)
Penstemon deustus subsp. sudans
(Under Penstemon sudans)
Synonym (tjm2)
Penstemon deustus var. deustusNative
Penstemon deustus var. pedicellatusNative
Penstemon deustus var. savagei
(Under Penstemon deustus var. suffrutescens)
Synonym (tjm2)
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 (tjm2)
Penstemon fruticiformis subsp. fruticiformis
(Under Penstemon fruticiformis var. fruticiformis)
Synonym (tjm2)
Penstemon fruticiformis var. amargosaeAMARGOSA BEARDTONGUENative
Penstemon fruticiformis var. fruticiformisNative
Penstemon gracilentusNative
Penstemon grinnelliiNative
Penstemon grinnellii subsp. grinnellii
(Under Penstemon grinnellii var. grinnellii)
Synonym (tjm2)
Penstemon grinnellii subsp. scrophularioides
(Under Penstemon grinnellii var. scrophularioides)
Synonym (tjm2)
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 (tjm2)
Penstemon heterophyllus subsp. heterophyllus
(Under Penstemon heterophyllus var. heterophyllus)
Synonym (tjm2)
Penstemon heterophyllus subsp. purdyi
(Under Penstemon heterophyllus var. purdyi)
Synonym (tjm2)
Penstemon heterophyllus var. australisNative
Penstemon heterophyllus var. heterophyllusNative
Penstemon heterophyllus var. purdyiNative
Penstemon hians
(Under Penstemon grinnellii var. grinnellii)
Synonym (tjm2)
Penstemon humilis
(Under Penstemon humilis var. humilis)
Mentioned in
a note
Penstemon humilis subsp. humilis
(Under Penstemon humilis var. humilis)
Synonym (tjm2)
Penstemon humilis var. humilisNative
Penstemon incertusNative
Penstemon jacintensis
(Under Keckiella rothrockii var. jacintensis)
Synonym (tjm2)
Penstemon janishiaeJANISH'S BEARDTONGUENative
Penstemon labrosusNative
Penstemon laetusNative
Penstemon laetus subsp. laetus
(Under Penstemon laetus var. laetus)
Synonym (tjm2)
Penstemon laetus subsp. leptosepalus
(Under Penstemon laetus var. leptosepalus)
Synonym (tjm2)
Penstemon laetus subsp. roezlii
(Under Penstemon roezlii)
Synonym (tjm2)
Penstemon laetus subsp. sagittatus
(Under Penstemon laetus var. sagittatus)
Synonym (tjm2)
Penstemon laetus var. laetusNative
Penstemon laetus var. leptosepalusNative
Penstemon laetus var. sagittatusNative
Penstemon lemmonii
(Under Keckiella lemmonii)
Synonym (tjm2)
Penstemon linarioides var. californicus
(Under Penstemon californicus)
Synonym (tjm2)
Penstemon miser
(Under Penstemon janishiae)
Synonym
Penstemon monoensisNative
Penstemon nemorosus
(Under Nothochelone nemorosa)
Synonym (tjm2)
Penstemon neotericusPLUMAS COUNTY BEARDTONGUENative
Penstemon newberryiNative
Penstemon newberryi subsp. berryi
(Under Penstemon newberryi var. berryi)
Synonym (tjm2)
Penstemon newberryi subsp. newberryi
(Under Penstemon newberryi var. newberryi)
Synonym (tjm2)
Penstemon newberryi subsp. sonomensis
(Under Penstemon newberryi var. sonomensis)
Synonym (tjm2)
Penstemon newberryi var. berryiNative
Penstemon newberryi var. newberryiNative
Penstemon newberryi var. sonomensisSONOMA BEARDTONGUENative
Penstemon oreocharis
(Under Penstemon rydbergii var. oreocharis)
Synonym (tjm2)
Penstemon pahutensisPAHUTE BEARDTONGUENative
Penstemon palmeri var. palmeriNative
Penstemon papillatusINYO BEARDTONGUENative
Penstemon parvulusNative
Penstemon patensNative
Penstemon peirsonii
(Under Penstemon grinnellii var. scrophularioides)
Synonym (tjm2)
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 (tjm2)
Penstemon rattanii subsp. rattanii
(Under Penstemon rattanii var. rattanii)
Synonym (tjm2)
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 (tjm2)
Penstemon shastensis
(Under Penstemon heterodoxus var. shastensis)
Synonym (tjm2)
Penstemon speciosusNative
Penstemon speciosus subsp. kennedyi
(Under Penstemon speciosus)
Synonym (tjm2)
Penstemon spectabilisNative
Penstemon spectabilis subsp. spectabilis
(Under Penstemon spectabilis var. spectabilis)
Synonym (tjm2)
Penstemon spectabilis subsp. subviscosus
(Under Penstemon spectabilis var. subviscosus)
Synonym (tjm2)
Penstemon spectabilis var. spectabilisNative
Penstemon spectabilis var. subviscosusNative
Penstemon stephensiiSTEPHENS' BEARDTONGUENative
Penstemon strictus
(Under Penstemon)
Mentioned in
a note
Penstemon subglaber
(Under Penstemon)
Mentioned in
a note
Penstemon sudansSUSANVILLE BEARDTONGUENative
Penstemon thompsoniaeTHOMPSON'S BEARDTONGUENative
Penstemon thompsoniae subsp. thompsoniae
(Under Penstemon thompsoniae)
Synonym (tjm2)
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 (tjm2)
Pentagramma triangularis subsp. rebmanii
(Under Pentagramma rebmanii)
Synonym (tjm2)
Pentagramma triangularis subsp. semipallida
(Under Pentagramma triangularis)
Synonym (tjm2)
Pentagramma triangularis subsp. viscosa
(Under Pentagramma viscosa)
Synonym (tjm2)
Pentagramma viscosaCOASTAL SILVERBACK FERNNative
Pentaphylloides fruticosa
(Under Dasiphora fruticosa)
Synonym (tjm2)
Peplis portula
(Under Lythrum portula)
Synonym (tjm2)
Peraphyllum
Peraphyllum ramosissimumNative
Perezia microcephala
(Under Acourtia microcephala)
Synonym (tjm2)
Pericallis hybrida
(Under Senecio)
Mentioned in
a note
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
  ↳  Key to Peritoma
BEE PLANT
Peritoma arboreaBLADDERPODNative
Peritoma arborea var. angustataNative
Peritoma arborea var. arboreaNative
Peritoma arborea var. globosaNative
Peritoma jonesiiJONES' BEE PLANTNative
Peritoma luteaYELLOW BEE PLANTNative
Peritoma platycarpaGOLDEN BEE PLANTNative
Peritoma serrulataROCKY MOUNTAIN BEE PLANTNaturalized
Perityle
  ↳  Key to Perityle
ROCK DAISY
Perityle emoryiEMORY'S ROCK DAISYNative
Perityle intricataDESERT ROCK DAISYNative
Perityle inyoensisINYO ROCK DAISYNative
Perityle megalocephalaNative
Perityle megalocephala var. intricata
(Under Perityle intricata)
Synonym (tjm2)
Perityle megalocephala var. megalocephalaNEVADA ROCK DAISYNative
Perityle megalocephala var. oligophyllaSMALL-LEAVED ROCK DAISYNative
Perityle villosaHANAUPAH ROCK DAISYNative
PerseaRED BAY
Persea americanaAVOCADOWaif
Persicaria
  ↳  Key to Persicaria
SMARTWEED
Persicaria amphibiaWATER SMARTWEEDNative
Persicaria amphibia var. emersa
(Under Persicaria amphibia)
Synonym (tjm2)
Persicaria amphibia var. stipulacea
(Under Persicaria amphibia)
Synonym (tjm2)
Persicaria capitataNaturalized
Persicaria coccinea
(Under Persicaria amphibia)
Synonym (tjm2)
Persicaria fusiformis
(Under Persicaria maculosa)
Synonym (tjm2)
Persicaria hydropiperWATERPEPPERNaturalized
Persicaria hydropiperoidesFALSE WATERPEPPERNative
Persicaria lapathifoliaWILLOW WEEDNative
Persicaria maculosaLADY'S THUMBNaturalized
Persicaria mississippiensis
(Under Persicaria pensylvanica)
Synonym (tjm2)
Persicaria opelousana
(Under Persicaria hydropiperoides)
Synonym (tjm2)
Persicaria orientalisKISS-ME-OVER-THE-GARDEN-GATEWaif
Persicaria paludicola
(Under Persicaria hydropiperoides)
Synonym (tjm2)
Persicaria pensylvanicaPINKWEEDNaturalized
Persicaria pensylvanica var. dura
(Under Persicaria pensylvanica)
Synonym (tjm2)
Persicaria polystachya
(Under Persicaria wallichii)
Synonym (tjm2)
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 (tjm2)
Petalostemon searlsiae
(Under Dalea searlsiae)
Synonym (tjm2)
Petasites
Petasites frigidus var. palmatusWESTERN SWEET COLTSFOOTNative
Peteria
Peteria thompsoniaeSPINE-NODED MILKVETCHNative
Petradoria
Petradoria pumila subsp. pumila
(Under Petradoria pumila var. pumila)
Synonym (tjm2)
Petradoria pumila var. pumilaROCK-GOLDENRODNative
Petrophyton caespitosum
(Under Petrophytum caespitosum)
Synonym (tjm2)
Petrophyton caespitosum subsp. acuminatum
(Under Petrophytum caespitosum subsp. acuminatum)
Synonym (tjm2)
Petrophyton caespitosum subsp. caespitosum
(Under Petrophytum caespitosum subsp. caespitosum)
Synonym (tjm2)
Petrophytum
Petrophytum caespitosum
  ↳  Key to Petrophytum caespitosum
Native
Petrophytum caespitosum subsp. acuminatumNative
Petrophytum caespitosum subsp. caespitosumNative
Petrorhagia
  ↳  Key to Petrorhagia
PROLIFEROUS PINK
Petrorhagia dubiaNaturalized
Petrorhagia nanteuiliiNaturalized
Petrorhagia proliferaNaturalized
Petrorhagia velutina
(Under Petrorhagia dubia)
Synonym (tjm2)
Petroselinum
Petroselinum crispumPARSLEYWaif
Petunia
Petunia axillaris
(Under Petunia)
Mentioned in
a note
Petunia parvifloraNative
Petunia violacea
(Under Petunia)
Mentioned in
a note
PeucephyllumPYGMY-CEDAR
Peucephyllum schottiiNative
Phacelia
  ↳  Key to Phacelia
Phacelia acanthominthoides
(Under Phacelia ciliata)
Synonym (tjm2)
Phacelia adenophoraNative
Phacelia affinisNative
Phacelia affinis var. patens
(Under Phacelia affinis)
Mentioned in
a note
Phacelia aldersonii
(Under Phacelia davidsonii)
Synonym (tjm2)
Phacelia alpina
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia alvordensis
(Under Phacelia distans)
Synonym (tjm2)
Phacelia amabilisSALINE VALLEY PHACELIANative
Phacelia ambigua
(Under Phacelia crenulata var. ambigua)
Mentioned in
a note
Phacelia ambigua var. minutiflora
(Under Phacelia crenulata var. minutiflora)
Synonym (tjm2)
Phacelia ammophila
(Under Phacelia distans)
Synonym (tjm2)
Phacelia anelsoniiAVEN NELSON'S PHACELIANative
Phacelia argenteaSAND DUNE PHACELIANative
Phacelia arthuri
(Under Phacelia distans)
Synonym (tjm2)
Phacelia austromontanaNative
Phacelia barnebyanaBARNEBY'S PHACELIANative
Phacelia bicolorNative
Phacelia bicolor var. bicolor
(Under Phacelia bicolor)
Synonym (tjm2)
Phacelia biennis
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia biolettii
(Under Phacelia californica)
Synonym (tjm2)
Phacelia bolanderiNative
Phacelia brachylobaNative
Phacelia brannanii
(Under Phacelia fremontii)
Synonym (tjm2)
Phacelia breweriNative
Phacelia burkei
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia californicaNative
Phacelia californica var. bernardina
(Under Phacelia imbricata var. bernardina)
Synonym (tjm2)
Phacelia californica var. egena
(Under Phacelia egena)
Synonym (tjm2)
Phacelia californica var. jacintensis
(Under Phacelia mutabilis)
Synonym (tjm2)
Phacelia californica var. patula
(Under Phacelia imbricata var. patula)
Synonym (tjm2)
Phacelia californica var. rotundata
(Under Phacelia argentea)
Synonym (tjm2)
Phacelia californica var. rubacea
(Under Phacelia heterophylla var. virgata)
Synonym (tjm2)
Phacelia californica var. virgata
(Under Phacelia heterophylla var. virgata)
Synonym (tjm2)
Phacelia calthifoliaNative
Phacelia campanulariaDESERT BLUEBELLSNative
Phacelia campanularia subsp. campanularia
(Under Phacelia campanularia var. campanularia)
Synonym (tjm2)
Phacelia campanularia subsp. vasiformis
(Under Phacelia campanularia var. vasiformis)
Synonym (tjm2)
Phacelia campanularia var. campanulariaNative
Phacelia campanularia var. vasiformisNative
Phacelia campestris
(Under Phacelia ivesiana)
Synonym (tjm2)
Phacelia canescens
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia cicutariaNative
Phacelia cicutaria subsp. hispida
(Under Phacelia cicutaria var. hispida)
Synonym (tjm2)
Phacelia cicutaria var. cicutariaNative
Phacelia cicutaria var. eximia
(Under Phacelia cicutaria var. hispida)
Synonym (tjm2)
Phacelia cicutaria var. heterosepala
(Under Phacelia cicutaria)
Mentioned in
a note
Phacelia cicutaria var. hispidaNative
Phacelia cicutaria var. hubbyi
(Under Phacelia hubbyi)
Synonym (tjm2)
Phacelia ciliataNative
Phacelia ciliata var. opaca
(Under Phacelia ciliata)
Mentioned in
a note
Phacelia ciliosa
(Under Phacelia sericea var. ciliosa)
Synonym (tjm2)
Phacelia cinerea
(Under Phacelia distans)
Synonym (tjm2)
Phacelia circinata var. integrifolia
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia circinatiformis
(Under Phacelia phacelioides)
Synonym (tjm2)
Phacelia coeruleaSKY-BLUE PHACELIANative
Phacelia compacta
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia congdoniiNative
Phacelia conmixta
(Under Phacelia distans)
Synonym (tjm2)
Phacelia cookeiCOOKE'S PHACELIANative
Phacelia cooperae
(Under Phacelia brachyloba)
Synonym (tjm2)
Phacelia corymbosaNative
Phacelia crassifolia
(Under Phacelia gymnoclada)
Synonym (tjm2)
Phacelia crenulataNative
Phacelia crenulata var. ambiguaNative
Phacelia crenulata var. crenulataNative
Phacelia crenulata var. funerea
(Under Phacelia crenulata var. crenulata)
Synonym (tjm2)
Phacelia crenulata var. minutifloraNative
Phacelia cryptanthaNative
Phacelia cryptantha var. derivata
(Under Phacelia cryptantha)
Synonym (tjm2)
Phacelia curvipesNative
Phacelia curvipes var. davidsonii
(Under Phacelia davidsonii)
Synonym (tjm2)
Phacelia curvipes var. insularis
(Under Phacelia insularis var. insularis)
Synonym (tjm2)
Phacelia curvipes var. macrantha
(Under Phacelia davidsonii)
Synonym (tjm2)
Phacelia curvipes var. pratensis
(Under Phacelia davidsonii)
Synonym (tjm2)
Phacelia curvipes var. yosemitana
(Under Phacelia vallicola)
Synonym (tjm2)
Phacelia dalesiana
(Under Howellanthus dalesianus)
Synonym (tjm2)
Phacelia dalesiana
(Under Phacelia)
Mentioned in
a note
Phacelia dasyphylla
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia dasyphylla var. ophitidis
(Under Phacelia corymbosa)
Synonym (tjm2)
Phacelia davidsoniiNative
Phacelia davidsonii var. macrantha
(Under Phacelia davidsonii)
Synonym (tjm2)
Phacelia distansNative
Phacelia distans subvar. ammophila
(Under Phacelia distans)
Synonym (tjm2)
Phacelia distans subvar. genuina
(Under Phacelia distans)
Synonym (tjm2)
Phacelia distans subvar. leptostachya
(Under Phacelia distans)
Synonym (tjm2)
Phacelia distans var. australis
(Under Phacelia distans)
Synonym (tjm2)
Phacelia distans var. scabrella
(Under Phacelia distans)
Synonym (tjm2)
Phacelia divaricataNative
Phacelia divaricata var. congdonii
(Under Phacelia congdonii)
Synonym (tjm2)
Phacelia divaricata var. continentis
(Under Phacelia insularis var. continentis)
Synonym (tjm2)
Phacelia divaricata var. insularis
(Under Phacelia insularis var. insularis)
Synonym (tjm2)
Phacelia dociana
(Under Phacelia quickii)
Synonym (tjm2)
Phacelia douglasiiNative
Phacelia douglasii subsp. cryptantha
(Under Phacelia stellaris)
Synonym (tjm2)
Phacelia douglasii var. cryptantha
(Under Phacelia stellaris)
Synonym (tjm2)
Phacelia douglasii var. petrophila
(Under Phacelia douglasii)
Mentioned in
a note
Phacelia egenaNative
Phacelia eiseniiNative
Phacelia eisenii var. brandegeeana
(Under Phacelia eisenii)
Mentioned in
a note
Phacelia eremica
(Under Phacelia cryptantha)
Synonym (tjm2)
Phacelia exilisTRANSVERSE RANGE PHACELIANative
Phacelia eximia
(Under Phacelia cicutaria var. hispida)
Synonym (tjm2)
Phacelia flaccida
(Under Phacelia rattanii)
Synonym (tjm2)
Phacelia floribundaMANY-FLOWERED PHACELIANative
Phacelia fremontiiNative
Phacelia frigida
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia frigida subsp. dasyphylla
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia frigida subsp. frigida
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia geraniifolia
(Under Phacelia perityloides var. jaegeri)
Synonym (tjm2)
Phacelia glanduliferaNative
Phacelia gooddingii
(Under Phacelia pulchella var. gooddingii)
Synonym (tjm2)
Phacelia grandifloraNative
Phacelia greeneiSCOTT VALLEY PHACELIANative
Phacelia griseaNative
Phacelia gymnocladaNAKED-STEMMED PHACELIANative
Phacelia hallii
(Under Phacelia fremontii)
Synonym (tjm2)
Phacelia hardhamiae
(Under Phacelia longipes)
Mentioned in
a note
Phacelia hastataNative
Phacelia hastata subsp. compacta
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia hastata subsp. hastata
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia hastata var. alpina
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia hastata var. charlestonensis
(Under Phacelia hastata)
Mentioned in
a note
Phacelia hastata var. compactaNative
Phacelia hastata var. dasyphylla
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia hastata var. hastataNative
Phacelia hastata var. leucophylla
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia heterophylla subsp. virgata
(Under Phacelia heterophylla var. virgata)
Synonym (tjm2)
Phacelia heterophylla var. alpina
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia heterophylla var. compacta
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia heterophylla var. dasyphylla
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia heterophylla var. frigida
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia heterophylla var. griseophylla
(Under Phacelia mutabilis)
Synonym (tjm2)
Phacelia heterophylla var. pseudohispida
(Under Phacelia mutabilis)
Synonym (tjm2)
Phacelia heterophylla var. pygmaea
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia heterophylla var. rotundata
(Under Phacelia argentea)
Synonym (tjm2)
Phacelia heterophylla var. virgataNative
Phacelia heterosperma
(Under Phacelia lemmonii)
Synonym (tjm2)
Phacelia hispida subvar. cicutaria
(Under Phacelia cicutaria var. cicutaria)
Synonym (tjm2)
Phacelia hispida var. brachyantha
(Under Phacelia cryptantha)
Synonym (tjm2)
Phacelia hispida var. cicutaria
(Under Phacelia cicutaria var. cicutaria)
Synonym (tjm2)
Phacelia hispida var. eximia
(Under Phacelia cicutaria var. hispida)
Synonym (tjm2)
Phacelia hispida var. hubbyi
(Under Phacelia hubbyi)
Synonym (tjm2)
Phacelia hispida var. umbrosa
(Under Phacelia umbrosa)
Synonym (tjm2)
Phacelia hubbyiNative
Phacelia humilisNative
Phacelia humilis var. congdonii
(Under Phacelia congdonii)
Synonym (tjm2)
Phacelia humilis var. dudleyiNative
Phacelia humilis var. humilisNative
Phacelia humilis var. lobata
(Under Phacelia austromontana)
Synonym (tjm2)
Phacelia hydrophylloidesNative
Phacelia imbricataNative
Phacelia imbricata subsp. bernardina
(Under Phacelia imbricata var. bernardina)
Synonym (tjm2)
Phacelia imbricata subsp. imbricata
(Under Phacelia imbricata var. bernardina)
Synonym (tjm2)
Phacelia imbricata subsp. imbricata
(Under Phacelia imbricata var. imbricata)
Synonym (tjm2)
Phacelia imbricata subsp. patula
(Under Phacelia imbricata var. patula)
Synonym (tjm2)
Phacelia imbricata var. bernardinaNative
Phacelia imbricata var. caudata
(Under Phacelia imbricata var. imbricata)
Synonym (tjm2)
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 (tjm2)
Phacelia ivesiana var. pediculoides
(Under Phacelia ivesiana)
Mentioned in
a note
Phacelia ixodes
(Under Phacelia)
Mentioned in
a note
Phacelia keckiiSANTIAGO PEAK PHACELIANative
Phacelia lemmoniiNative
Phacelia leonisSISKIYOU PHACELIANative
Phacelia leptostachya
(Under Phacelia distans)
Synonym (tjm2)
Phacelia leucantha
(Under Phacelia brachyloba)
Synonym (tjm2)
Phacelia leucophylla
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia leucophylla var. alpina
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia leucophylla var. compacta
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia leucophylla var. suksdorfii
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia linearisNative
Phacelia loasifolia
(Under Phacelia malvifolia var. loasifolia)
Synonym (tjm2)
Phacelia lobata
(Under Phacelia austromontana)
Synonym (tjm2)
Phacelia longipesNative
Phacelia lutea
(Under Phacelia monoensis)
Mentioned in
a note
Phacelia lutea var. glandulifera
(Under Phacelia adenophora)
Synonym (tjm2)
Phacelia luteopurpurea
(Under Phacelia glandulifera)
Synonym (tjm2)
Phacelia lyoniiNative
Phacelia magellanica f. compacta
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia magellanica f. egena
(Under Phacelia egena)
Synonym (tjm2)
Phacelia magellanica f. patula
(Under Phacelia imbricata var. patula)
Synonym (tjm2)
Phacelia magellanica var. californica
(Under Phacelia californica)
Synonym (tjm2)
Phacelia magellanica var. corymbosa
(Under Phacelia corymbosa)
Synonym (tjm2)
Phacelia magellanica var. frigida
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia magellanica var. griseophylla
(Under Phacelia mutabilis)
Synonym (tjm2)
Phacelia magellanica var. integrifolia
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia magellanica var. jacintensis
(Under Phacelia mutabilis)
Synonym (tjm2)
Phacelia magellanica var. patula
(Under Phacelia imbricata var. patula)
Synonym (tjm2)
Phacelia malvifoliaNative
Phacelia malvifolia
(Under Phacelia malvifolia var. loasifolia)
Synonym (tjm2)
Phacelia malvifolia
(Under Phacelia malvifolia var. malvifolia)
Synonym (tjm2)
Phacelia malvifolia subsp. loasifolia
(Under Phacelia malvifolia var. loasifolia)
Synonym (tjm2)
Phacelia malvifolia var. loasifoliaNative
Phacelia malvifolia var. malvifoliaNative
Phacelia marcescensNative
Phacelia menziesii
(Under Phacelia linearis)
Synonym (tjm2)
Phacelia micrantha
(Under Eucrypta micrantha)
Synonym (tjm2)
Phacelia micrantha var. bipinnatifida
(Under Eucrypta chrysanthemifolia var. bipinnatifida)
Synonym (tjm2)
Phacelia minima
(Under Phacelia eisenii)
Synonym (tjm2)
Phacelia minorWILD CANTERBURY BELLSNative
Phacelia minor var. campanularia
(Under Phacelia campanularia var. campanularia)
Synonym (tjm2)
Phacelia minor var. whitlavia
(Under Phacelia minor)
Synonym (tjm2)
Phacelia minutiflora
(Under Phacelia crenulata var. minutiflora)
Synonym (tjm2)
Phacelia mohavensisMOJAVE PHACELIANative
Phacelia mohavensis var. exilis
(Under Phacelia exilis)
Synonym (tjm2)
Phacelia monoensisMONO COUNTY PHACELIANative
Phacelia monosperma
(Under Phacelia heterophylla var. virgata)
Synonym (tjm2)
Phacelia mustelinaDEATH VALLEY ROUND-LEAVED PHACELIANative
Phacelia mutabilisNative
Phacelia mutabilis var. frigida
(Under Phacelia hastata var. compacta)
Synonym (tjm2)
Phacelia namatoides
(Under Phacelia racemosa)
Synonym (tjm2)
Phacelia nashianaCHARLOTTE'S PHACELIANative
Phacelia neglectaNative
Phacelia nemophiloides
(Under Phacelia davidsonii)
Synonym (tjm2)
Phacelia nemoralisNative
Phacelia nemoralis subsp. nemoralis
(Under Phacelia nemoralis var. nemoralis)
Synonym (tjm2)
Phacelia nemoralis subsp. oregonensis
(Under Phacelia nemoralis var. oregonensis)
Synonym (tjm2)
Phacelia nemoralis var. mutabilis
(Under Phacelia mutabilis)
Synonym (tjm2)
Phacelia nemoralis var. nemoralisNative
Phacelia nemoralis var. oregonensisNative
Phacelia nemoralis var. pseudohispida
(Under Phacelia mutabilis)
Synonym (tjm2)
Phacelia nervosa
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia novenmillensisNINE MILE CANYON PHACELIANative
Phacelia orcuttiana
(Under Phacelia brachyloba)
Synonym (tjm2)
Phacelia oreopola
(Under Phacelia imbricata var. patula)
Synonym (tjm2)
Phacelia oreopola subsp. oreopola
(Under Phacelia imbricata var. patula)
Synonym (tjm2)
Phacelia oreopola subsp. simulans
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia orogenesMOUNTAIN PHACELIANative
Phacelia pachyphyllaNative
Phacelia palmeri
(Under Phacelia stellaris)
Synonym (tjm2)
Phacelia parishiiPARISH'S PHACELIANative
Phacelia parryiNative
Phacelia pedicellataNative
Phacelia peirsonianaPEIRSON'S PHACELIANative
Phacelia perityloidesNative
Phacelia perityloides var. jaegeriJAEGER'S PHACELIANative
Phacelia perityloides var. laxiflora
(Under Phacelia perityloides)
Mentioned in
a note
Phacelia perityloides var. perityloidesNative
Phacelia phacelioidesMOUNT DIABLO PHACELIANative
Phacelia phyllomanica var. interrupta
(Under Phacelia floribunda)
Synonym (tjm2)
Phacelia piersoniae
(Under Phacelia heterophylla var. virgata)
Synonym (tjm2)
Phacelia pinetorum
(Under Eucrypta micrantha)
Synonym (tjm2)
Phacelia pinnata var. pseudohispida
(Under Phacelia mutabilis)
Synonym (tjm2)
Phacelia platylobaNative
Phacelia polysperma
(Under Phacelia lemmonii)
Synonym (tjm2)
Phacelia pratensis
(Under Phacelia davidsonii)
Synonym (tjm2)
Phacelia pringleiNative
Phacelia pringlei var. orogenes
(Under Phacelia orogenes)
Synonym (tjm2)
Phacelia proceraNative
Phacelia pulchella var. gooddingiiGOODDING'S PHACELIANative
Phacelia purpusiiNative
Phacelia quickiiNative
Phacelia racemosaNative
Phacelia ramosissimaNative
Phacelia ramosissima var. austrolitoralis
(Under Phacelia ramosissima)
Synonym (tjm2)
Phacelia ramosissima var. eremophila
(Under Phacelia ramosissima)
Synonym (tjm2)
Phacelia ramosissima var. hispida
(Under Phacelia cicutaria var. hispida)
Synonym (tjm2)
Phacelia ramosissima var. latifolia
(Under Phacelia ramosissima)
Synonym (tjm2)
Phacelia ramosissima var. montereyensis
(Under Phacelia ramosissima)
Synonym (tjm2)
Phacelia ramosissima var. subglabra
(Under Phacelia ramosissima)
Synonym (tjm2)
Phacelia ramosissima var. suffrutescens
(Under Phacelia ramosissima)
Synonym (tjm2)
Phacelia ramosissima var. valida
(Under Phacelia ramosissima)
Synonym (tjm2)
Phacelia rattaniiNative
Phacelia rotundifoliaNative
Phacelia rugulosa
(Under Phacelia affinis)
Synonym (tjm2)
Phacelia salina
(Under Phacelia parishii)
Synonym (tjm2)
Phacelia saxicolaNative
Phacelia scabrella
(Under Phacelia distans)
Synonym (tjm2)
Phacelia sericea subsp. ciliosa
(Under Phacelia sericea var. ciliosa)
Synonym (tjm2)
Phacelia sericea var. biennis
(Under Phacelia hastata var. hastata)
Synonym (tjm2)
Phacelia sericea var. ciliosaBLUE ALPINE PHACELIANative
Phacelia sericea var. nelsonii
(Under Phacelia sericea var. ciliosa)
Synonym (tjm2)
Phacelia sericea var. sericea
(Under Phacelia sericea var. ciliosa)
Mentioned in
a note
Phacelia stebbinsiiSTEBBINS' PHACELIANative
Phacelia stellarisBRAND'S STAR PHACELIANative
Phacelia suaveolensNative
Phacelia suaveolens subsp. keckii
(Under Phacelia keckii)
Synonym (tjm2)
Phacelia suaveolens var. keckii
(Under Phacelia keckii)
Synonym (tjm2)
Phacelia tanacetifoliaNative
Phacelia tanacetifolia var. cinerea
(Under Phacelia tanacetifolia)
Synonym (tjm2)
Phacelia tanacetifolia var. hubbyi
(Under Phacelia hubbyi)
Synonym (tjm2)
Phacelia tanacetifolia var. pseudo-distans
(Under Phacelia tanacetifolia)
Synonym (tjm2)
Phacelia tanacetifolia var. tenuifolia
(Under Phacelia distans)
Synonym (tjm2)
Phacelia tenuifolia
(Under Phacelia distans)
Synonym (tjm2)
Phacelia tetrameraNative
Phacelia thermalisNative
Phacelia umbrosaNative
Phacelia vallicolaMARIPOSA PHACELIANative
Phacelia vallis-mortaeNative
Phacelia vallis-mortae var. heliophila
(Under Phacelia vallis-mortae)
Mentioned in
a note
Phacelia virgata
(Under Phacelia heterophylla var. virgata)
Synonym (tjm2)
Phacelia virgata
(Under Phacelia imbricata var. bernardina)
Synonym (tjm2)
Phacelia virgata var. ampliata
(Under Phacelia heterophylla var. virgata)
Synonym (tjm2)
Phacelia viscidaNative
Phacelia viscida var. albifloraNative
Phacelia viscida var. viscidaNative
Phacelia whitlavia
(Under Phacelia minor)
Synonym (tjm2)
Phacelia whitlavia var. jonesii
(Under Phacelia minor)
Synonym (tjm2)
Phalacroseris
Phalacroseris bolanderiBOLANDER'S MOCK DANDELIONNative
Phalacroseris bolanderi var. coronata
(Under Phalacroseris bolanderi)
Synonym (tjm2)
Phalaris
  ↳  Key to Phalaris
CANARY GRASS
Phalaris americana
(Under Phalaris caroliniana)
Synonym
Phalaris amethystina
(Under Phalaris californica)
Synonym
Phalaris angustaTIMOTHY CANARY GRASSNative
Phalaris aquaticaHARDING GRASSNaturalized
Phalaris arundinaceaREED CANARY GRASSNative
Phalaris brachystachysSHORT-SPIKED CANARY GRASSNaturalized
Phalaris bulbosa
(Under Phalaris aquatica)
Synonym
Phalaris bulbosa
(Under Phalaris coerulescens)
Synonym
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 (tjm2)
Phaseolus coccineus
(Under Phaseolus)
Mentioned in
a note
Phaseolus filiformisSLENDER-STEM BEANNative
Phaseolus lunatus
(Under Phaseolus)
Mentioned in
a note
Phaseolus sanctorum
(Under Phaseolus filiformis)
Synonym (tjm2)
Phaseolus vulgaris
(Under Phaseolus)
Mentioned in
a note
Phaseolus wrightii
(Under Phaseolus filiformis)
Synonym (tjm2)
Philadelphus
  ↳  Key to Philadelphus
MOCK ORANGE
Philadelphus californicus
(Under Philadelphus lewisii)
Synonym (tjm2)
Philadelphus lewisiiWILD MOCK ORANGENative
Philadelphus lewisii subsp. californicus
(Under Philadelphus lewisii)
Synonym (tjm2)
Philadelphus lewisii subsp. gordonianus
(Under Philadelphus lewisii)
Synonym (tjm2)
Philadelphus microphyllusLITTLELEAF MOCK ORANGENative
Philadelphus microphyllus subsp. pumilus
(Under Philadelphus microphyllus)
Synonym (tjm2)
Philadelphus microphyllus subsp. stramineus
(Under Philadelphus microphyllus)
Synonym (tjm2)
Philadelphus microphyllus var. pumilus
(Under Philadelphus microphyllus)
Synonym (tjm2)
Philadelphus microphyllus var. stramineus
(Under Philadelphus microphyllus)
Synonym (tjm2)
Philadelphus pumilus
(Under Philadelphus microphyllus)
Synonym (tjm2)
Philadelphus stramineus
(Under Philadelphus microphyllus)
Synonym (tjm2)
Philibertella hartwegii
(Under Funastrum cynanchoides var. hartwegii)
Synonym (tjm2)
Philibertia heterophylla
(Under Funastrum cynanchoides var. hartwegii)
Synonym (tjm2)
Philibertia hirtella
(Under Funastrum hirtellum)
Synonym (tjm2)
Philibertia linearis var. hirtella
(Under Funastrum hirtellum)
Synonym (tjm2)
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 (tjm2)
Phlox austromontana subsp. prostrata
(Under Phlox austromontana)
Synonym (tjm2)
Phlox azurea
(Under Phlox diffusa)
Synonym (tjm2)
Phlox bryoides
(Under Phlox muscoides)
Synonym (tjm2)
Phlox caespitosa
(Under Phlox douglasii)
Mentioned in
a note
Phlox caespitosa subsp. pulvinata
(Under Phlox pulvinata)
Synonym (tjm2)
Phlox caespitosa var. condensata
(Under Phlox condensata)
Synonym (tjm2)
Phlox condensataNative
Phlox covillei
(Under Phlox condensata)
Synonym (tjm2)
Phlox diffusaNative
Phlox dispersaHIGH SIERRA PHLOXNative
Phlox dolichanthaBIG BEAR VALLEY PHLOXNative
Phlox douglasiiNative
Phlox douglasii subsp. rigida
(Under Phlox douglasii)
Synonym (tjm2)
Phlox gracilis
(Under Microsteris gracilis)
Synonym (tjm2)
Phlox gracilis
(Under Phlox)
Mentioned in
a note
Phlox hirsutaYREKA PHLOXNative
Phlox hoodii subsp. canescensNative
Phlox hoodii subsp. lanata
(Under Phlox hoodii subsp. canescens)
Synonym (tjm2)
Phlox longifolia
(Under Phlox stansburyi)
Mentioned in
a note
Phlox muscoidesSQUARESTEM PHLOXNative
Phlox pulvinataNative
Phlox rigida
(Under Phlox douglasii)
Synonym (tjm2)
Phlox speciosaNative
Phlox speciosa subsp. nitida
(Under Phlox speciosa)
Synonym (tjm2)
Phlox speciosa subsp. occidentalis
(Under Phlox speciosa)
Synonym (tjm2)
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 (tjm2)
Phoradendron bolleanum subsp. pauciflorum
(Under Phoradendron bolleanum)
Synonym (tjm2)
Phoradendron bolleanum var. densum
(Under Phoradendron bolleanum)
Synonym (tjm2)
Phoradendron bolleanum var. pauciflorum
(Under Phoradendron bolleanum)
Synonym (tjm2)
Phoradendron californicumDESERT MISTLETOENative
Phoradendron californicum var. distans
(Under Phoradendron californicum)
Synonym (tjm2)
Phoradendron californicum var. leucocarpum
(Under Phoradendron californicum)
Synonym (tjm2)
Phoradendron densum
(Under Phoradendron bolleanum)
Synonym (tjm2)
Phoradendron juniperinumJUNIPER or INCENSE CEDAR MISTLETOENative
Phoradendron juniperinum var. ligatum
(Under Phoradendron juniperinum)
Synonym (tjm2)
Phoradendron leucarpumAMERICAN MISTLETOENative
Phoradendron leucarpum subsp. macrophyllumNative
Phoradendron leucarpum subsp. tomentosumNative
Phoradendron libocedri
(Under Phoradendron juniperinum)
Synonym (tjm2)
Phoradendron macrophyllum
(Under Phoradendron leucarpum subsp. macrophyllum)
Synonym (tjm2)
Phoradendron pauciflorum
(Under Phoradendron bolleanum)
Synonym (tjm2)
Phoradendron serotinum
(Under Phoradendron)
Mentioned in
a note
Phoradendron serotinum
(Under Phoradendron leucarpum)
Synonym (tjm2)
Phoradendron serotinum subsp. macrophyllum
(Under Phoradendron leucarpum subsp. macrophyllum)
Synonym (tjm2)
Phoradendron serotinum subsp. tomentosum
(Under Phoradendron leucarpum subsp. tomentosum)
Synonym (tjm2)
Phoradendron villosum
(Under Phoradendron leucarpum subsp. tomentosum)
Synonym (tjm2)
PhragmitesCOMMON REED, CARRIZO
Phragmites australisCOMMON REEDNative
Phragmites australis subsp. americanus
(Under Phragmites australis)
Mentioned in
a note
Phragmites australis subsp. berlandieri
(Under Phragmites australis)
Mentioned in
a note
Phragmites australis var. berlandieri
(Under Phragmites australis)
Synonym (tjm2)
Phragmites berlandieri
(Under Phragmites australis)
Synonym (tjm2)
Phragmites communis
(Under Phragmites australis)
Synonym (tjm2)
Phragmites communis var. berlandieri
(Under Phragmites australis)
Synonym (tjm2)
PhrymaceaeLOPSEED FAMILY
Phyla
  ↳  Key to Phyla
Phyla lanceolataNative
Phyla nodifloraNative
Phyla nodiflora var. canescens
(Under Phyla nodiflora)
Synonym (tjm2)
Phyla nodiflora var. incisa
(Under Phyla nodiflora)
Synonym (tjm2)
Phyla nodiflora var. reptans
(Under Phyla nodiflora)
Synonym (tjm2)
Phyla nodiflora var. rosea
(Under Phyla nodiflora)
Synonym (tjm2)
Phyllodoce
  ↳  Key to Phyllodoce
MOUNTAIN HEATHER
Phyllodoce breweriNative
Phyllodoce empetriformisNative
Phyllogonum luteolum
(Under Gilmania luteola)
Synonym (tjm2)
Phyllospadix
  ↳  Key to Phyllospadix
SURF-GRASS
Phyllospadix scouleriNative
Phyllospadix torreyiNative
Phyllostachys
Phyllostachys aureaFISHPOLE BAMBOO, GOLDEN BAMBOOAgricultural, garden, or urban weed
Phyllostachys bambusoides
(Under Poaceae)
Mentioned in
a note
Physalis
  ↳  Key to Physalis
GROUND-CHERRY
Physalis acutifoliaNative
Physalis angulata var. lancifolia
(Under Physalis lancifolia)
Synonym (tjm2)
Physalis crassifoliaNative
Physalis crassifolia var. versicolor
(Under Physalis crassifolia)
Synonym (tjm2)
Physalis fendleri
(Under Physalis hederifolia var. fendleri)
Synonym (tjm2)
Physalis greenei
(Under Physalis crassifolia)
Synonym (tjm2)
Physalis hederifoliaNative
Physalis hederifolia var. cordifolia
(Under Physalis hederifolia var. fendleri)
Synonym (tjm2)
Physalis hederifolia var. fendleriNative
Physalis hederifolia var. palmeriNative
Physalis ixocarpa
(Under Physalis philadelphica)
Synonym (tjm2)
Physalis lancifoliaNaturalized
Physalis lobataLOBED GROUND-CHERRYNative
Physalis longifoliaWaif
Physalis philadelphicaTOMATILLONaturalized
Physalis pruinosa
(Under Physalis pubescens var. grisea)
Synonym (tjm2)
Physalis pubescensNaturalized
Physalis pubescens var. griseaNaturalized
Physalis pubescens var. integrifoliaNaturalized
Physalis viscosaGRAPE GROUND-CHERRYWaif
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. cinerascens
(Under Physaria occidentalis subsp. occidentalis)
Mentioned in
a note
Physaria occidentalis subsp. occidentalisNative
Physaria tenellaNative
Physaria wardii
(Under Physaria kingii subsp. latifolia)
Synonym (tjm2)
Physocarpus
  ↳  Key to Physocarpus
NINEBARK
Physocarpus alternansNEVADA NINEBARKNative
Physocarpus alternans subsp. annulatus
(Under Physocarpus alternans)
Synonym (tjm2)
Physocarpus alternans subsp. panamintensis
(Under Physocarpus alternans)
Synonym (tjm2)
Physocarpus capitatusNative
Phytolacca
  ↳  Key to Phytolacca
Phytolacca americana var. americanaPOKEWEEDNaturalized
Phytolacca americana var. rigida
(Under Phytolacca americana var. americana)
Mentioned in
a note
Phytolacca heterotepalaMEXICAN POKEWEEDWaif
Phytolacca icosandraTROPICAL POKEWEEDNaturalized
Phytolacca octandra
(Under Phytolacca icosandra)
Mentioned in
a note
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 Asteraceae)
Mentioned in
a note
Picris echioides
(Under Helminthotheca echioides)
Synonym (tjm2)
PicrodendraceaeBITTER-TREE FAMILY
Picrothamnus desertorum
(Under Artemisia spinescens)
Synonym (tjm2)
Pilostyles
Pilostyles thurberiTHURBER'S PILOSTYLESNative
Pilularia
Pilularia americanaNative
Pimenta dioica
(Under Myrtaceae)
Mentioned in
a note
Pinaceae
  ↳  Key to Pinaceae
PINE FAMILY
Pinellia ternata
(Under Araceae)
Mentioned in
a note
PinguiculaBUTTERWORT
Pinguicula macrocerasHORNED BUTTERWORTNative
Pinguicula macroceras subsp. macroceras
(Under Pinguicula macroceras)
Synonym (tjm2)
Pinguicula macroceras subsp. nortensis
(Under Pinguicula macroceras)
Synonym (tjm2)
Pinguicula vulgaris
(Under Pinguicula macroceras)
Mentioned in
a note
Pinguicula vulgaris subsp. macroceras
(Under Pinguicula macroceras)
Synonym (tjm2)
Pinus
  ↳  Key to Pinus
PINE
Pinus albicaulisWHITEBARK PINENative
Pinus aristata
(Under Pinus longaeva)
Synonym (tjm2)
Pinus attenuataKNOBCONE PINENative
Pinus balfourianaFOXTAIL PINENative
Pinus balfouriana subsp. austrinaNative
Pinus balfouriana subsp. balfourianaNative
Pinus benthamiana
(Under Pinus ponderosa var. pacifica)
Synonym (tjm2)
Pinus californiarum
(Under Pinus monophylla)
Synonym (tjm2)
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 juarezensis
(Under Pinus quadrifolia)
Mentioned in
a note
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 (tjm2)
Pinus pinea
(Under Pinus)
Mentioned in
a note
Pinus ponderosaPONDEROSA PINE, WESTERN YELLOW PINENative
Pinus ponderosa subsp. benthamiana
(Under Pinus ponderosa var. pacifica)
Synonym (tjm2)
Pinus ponderosa var. benthamiana
(Under Pinus ponderosa var. pacifica)
Synonym (tjm2)
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 (tjm2)
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)
Mentioned in
a note
Pinus washoensis
(Under Pinus ponderosa var. washoensis)
Synonym (tjm2)
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 (tjm2)
Piptatherum micranthum
(Under Stipa divaricata)
Synonym (tjm2)
Piptatherum miliaceum
(Under Stipa miliacea var. miliacea)
Synonym (tjm2)
Piptatherum miliaceum subsp. miliaceum
(Under Stipa miliacea var. miliacea)
Synonym
Piptochaetium setosum
(Under Stipa purpurata)
Synonym (tjm2)
Piptochaetium stipoides
(Under Stipa chaetophora)
Synonym (tjm2)
PistaciaPISTACHIO
Pistacia atlanticaNaturalized
Pistacia texana
(Under Pistacia)
Mentioned in
a note
Pistacia vera
(Under Pistacia)
Mentioned in
a note
Pistacia vera
(Under Pistacia atlantica)
Mentioned in
a note
PistiaWATER-LETTUCE
Pistia stratiotesWaif
PisumPEA
Pisum sativumCOMMON PEANaturalized
Pisum sativum var. arvense
(Under Pisum sativum)
Synonym (tjm2)
Pithecellobium minutum
(Under Vachellia farnesiana var. minuta)
Synonym (tjm2)
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 (tjm2)
Pityrogramma triangularis var. pallida
(Under Pentagramma pallida)
Synonym (tjm2)
Pityrogramma triangularis var. triangularis
(Under Pentagramma triangularis)
Synonym (tjm2)
Pityrogramma triangularis var. viscosa
(Under Pentagramma viscosa)
Synonym (tjm2)
Plagiobothrys
  ↳  Key to Plagiobothrys
POPCORNFLOWER
Plagiobothrys acanthocarpusADOBE POPCORNFLOWERNative
Plagiobothrys arizonicusARIZONA POPCORNFLOWERNative
Plagiobothrys austinae, orth. var.
(Under Plagiobothrys austiniae)
Synonym (tjm2)
Plagiobothrys austiniaeAUSTIN'S SPINY-NUT POPCORNFLOWERNative
Plagiobothrys bracteatusBRACTED POPCORNFLOWERNative
Plagiobothrys bracteatus var. aculeolatus
(Under Plagiobothrys bracteatus)
Synonym (tjm2)
Plagiobothrys californicus
(Under Plagiobothrys collinus var. californicus)
Synonym (tjm2)
Plagiobothrys californicus var. fulvescens
(Under Plagiobothrys collinus var. fulvescens)
Synonym (tjm2)
Plagiobothrys californicus var. gracilis
(Under Plagiobothrys collinus var. gracilis)
Synonym (tjm2)
Plagiobothrys californicus var. ursinus
(Under Plagiobothrys collinus var. ursinus)
Synonym (tjm2)
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 colorans
(Under Plagiobothrys tenellus)
Mentioned in
a note
Plagiobothrys cusickiiCUSICK'S POPCORNFLOWERNative
Plagiobothrys diffususSAN FRANCISCO POPCORNFLOWERNative
Plagiobothrys distantiflorusMADERA POPCORNFLOWERNative
Plagiobothrys foliaceus
(Under Plagiobothrys hispidus)
Synonym (tjm2)
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 hispidusCASCADE POPCORNFLOWER, BRISTLY POPCORNFLOWERNative
Plagiobothrys humistratusLOW POPCORNFLOWERNative
Plagiobothrys hystriculusBEARDED POPCORNFLOWERNative
Plagiobothrys infectivusDYE POPCORNFLOWERNative
Plagiobothrys jonesiiMOJAVE POPCORNFLOWERNative
Plagiobothrys kingiiGREAT BASIN POPCORNFLOWERNative
Plagiobothrys kingii var. harknessiiNORTHERN GREAT BASIN POPCORNFLOWERNative
Plagiobothrys kingii var. kingiiSOUTHERN GREAT BASIN POPCORNFLOWERNative
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)
Synonym (tjm2)
Plagiobothrys myosotoides subsp. verrucosus
(Under Plagiobothrys verrucosus)
Synonym (tjm2)
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
(Under Plagiobothrys cognatus)
Synonym (tjm2)
Plagiobothrys scouleri var. cusickii
(Under Plagiobothrys cusickii)
Synonym (tjm2)
Plagiobothrys scouleri var. hispidulus
(Under Plagiobothrys hispidulus)
Synonym (tjm2)
Plagiobothrys scouleri var. penicillatus
(Under Plagiobothrys cusickii)
Synonym (tjm2)
Plagiobothrys scouleri var. penicillatus
(Under Plagiobothrys hispidulus)
Synonym (tjm2)
Plagiobothrys scouleri var. penicillatus
(Under Plagiobothrys nitens)
Synonym (tjm2)
Plagiobothrys scouleri var. penicillatus
(Under Plagiobothrys reticulatus var. rossianorum)
Synonym (tjm2)
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
Plagobothrys shastensis
(Under Plagiobothrys tenellus)
Mentioned in
a note
Planodes
Planodes virginicaNaturalized
Planodes virginicum
(Under Sibara)
Mentioned in
a note
Plantaginaceae
  ↳  Key to Plantaginaceae
PLANTAIN FAMILY
Plantago
  ↳  Key to Plantago
PLANTAIN
Plantago afra
(Under Plantago)
Mentioned in
a note
Plantago arenariaNaturalized
Plantago aristataNaturalized
Plantago bigelovii
(Under Plantago elongata)
Synonym (tjm2)
Plantago bigelovii subsp. bigelovii
(Under Plantago elongata)
Synonym (tjm2)
Plantago bigelovii subsp. californica
(Under Plantago elongata)
Synonym (tjm2)
Plantago bigelovii subsp. californica
(Under Plantago erecta)
Synonym (tjm2)
Plantago coronopusNaturalized
Plantago elongataNative
Plantago elongata subsp. elongata
(Under Plantago elongata)
Synonym (tjm2)
Plantago elongata subsp. pentasperma
(Under Plantago elongata)
Synonym (tjm2)
Plantago erectaNative
Plantago erecta subsp. rigidior
(Under Plantago erecta)
Synonym (tjm2)
Plantago eriopodaNative
Plantago fastigiata
(Under Plantago ovata var. fastigiata)
Synonym (tjm2)
Plantago heterophylla
(Under Plantago)
Mentioned in
a note
Plantago hirtella var. galeottiana
(Under Plantago subnuda)
Synonym (tjm2)
Plantago hookeriana var. californica
(Under Plantago erecta)
Synonym (tjm2)
Plantago indica
(Under Plantago arenaria)
Synonym (tjm2)
Plantago insularis
(Under Plantago ovata var. insularis)
Synonym (tjm2)
Plantago insularis var. fastigiata
(Under Plantago ovata var. fastigiata)
Synonym (tjm2)
Plantago lanceolataENGLISH PLANTAINNaturalized
Plantago majorCOMMON PLANTAINNaturalized
Plantago major var. pilgeri
(Under Plantago major)
Synonym (tjm2)
Plantago major var. scopulorum
(Under Plantago major)
Synonym (tjm2)
Plantago maritimaNative
Plantago maritima var. californica
(Under Plantago maritima)
Synonym (tjm2)
Plantago maritima var. juncoides
(Under Plantago maritima)
Synonym (tjm2)
Plantago maritima var. maritima
(Under Plantago maritima)
Synonym (tjm2)
Plantago ovataNative
Plantago ovata var. fastigiataNative
Plantago ovata var. insularisNative
Plantago patagonicaNative
Plantago psyllium
(Under Plantago arenaria)
Synonym (tjm2)
Plantago purshii
(Under Plantago patagonica)
Synonym (tjm2)
Plantago purshii var. oblonga
(Under Plantago patagonica)
Synonym (tjm2)
Plantago purshii var. picta
(Under Plantago patagonica)
Synonym (tjm2)
Plantago pusillaNaturalized
Plantago rhodospermaNative
Plantago sempervirens
(Under Plantago)
Mentioned in
a note
Plantago subnudaNative
Plantago truncata subsp. firmaNaturalized
Plantago virginicaNaturalized
PlatanaceaePLANE-TREE or SYCAMORE FAMILY
Platanthera
  ↳  Key to Platanthera
BOG-ORCHID
Platanthera dilatata
(Under Platanthera)
Mentioned in
a note
Platanthera dilatata var. leucostachysWHITE-FLOWERED BOG-ORCHIDNative
Platanthera foetida
(Under Piperia unalascensis)
Synonym (tjm2)
Platanthera gracilis
(Under Platanthera stricta)
Synonym (tjm2)
Platanthera huronensis
(Under Platanthera)
Mentioned in
a note
Platanthera hyperborea
(Under Platanthera)
Mentioned in
a note
Platanthera hyperborea
(Under Platanthera tescamnis)
Synonym (tjm2)
Platanthera hyperborea var. purpurascens
(Under Platanthera yosemitensis)
Synonym
Platanthera leucostachys
(Under Platanthera dilatata var. leucostachys)
Synonym (tjm2)
Platanthera purpurascens
(Under Platanthera yosemitensis)
Synonym
Platanthera sparsifloraSPARSE-FLOWERED BOG-ORCHIDNative
Platanthera strictaSLENDER BOG-ORCHIDNative
Platanthera tescamnisNative
Platanthera yosemitensisYOSEMITE BOG-ORCHIDNative
Platanus
  ↳  Key to Platanus
Platanus
  ↳  Key to Platanus
LONDON PLANE TREEWaif
Platanus racemosaWESTERN SYCAMORENative
Platanus racemosa var. wrightii
(Under Platanus racemosa)
Mentioned in
a note
Platanus wrightii
(Under Platanus racemosa)
Mentioned in
a note
Platystemon
Platystemon californicusCREAM CUPSNative
Platystemon californicus var. ciliatus
(Under Platystemon californicus)
Synonym (tjm2)
Platystemon californicus var. crinitus
(Under Platystemon californicus)
Synonym (tjm2)
Platystemon californicus var. horridulus
(Under Platystemon californicus)
Synonym (tjm2)
Platystemon californicus var. nutans
(Under Platystemon californicus)
Synonym (tjm2)
Platystemon californicus var. ornithopus
(Under Platystemon californicus)
Synonym (tjm2)
Platystemon californicus var. sphaerocarpus
(Under Platystemon californicus)
Synonym (tjm2)
Platystemon crinitus
(Under Platystemon californicus)
Synonym (tjm2)
Platystigma linearis
(Under Hesperomecon linearis)
Synonym (tjm2)
Plecostachys
Plecostachys serpyllifoliaPETITE-LICORICENaturalized
Plectritis
  ↳  Key to Plectritis
Plectritis brachystemon
(Under Plectritis congesta subsp. brachystemon)
Synonym (tjm2)
Plectritis ciliosaNative
Plectritis ciliosa subsp. ciliosa
(Under Plectritis ciliosa)
Synonym (tjm2)
Plectritis ciliosa subsp. insignis
(Under Plectritis ciliosa)
Synonym (tjm2)
Plectritis congestaNative
Plectritis congesta subsp. brachystemonNative
Plectritis congesta subsp. congestaSEA BLUSHNative
Plectritis congesta subsp. nitida
(Under Plectritis congesta subsp. brachystemon)
Synonym (tjm2)
Plectritis eichleriana
(Under Plectritis macrocera)
Synonym (tjm2)
Plectritis jepsonii
(Under Plectritis macrocera)
Synonym (tjm2)
Plectritis macroceraNative
Plectritis macrocera var. collina
(Under Plectritis macrocera)
Synonym (tjm2)
Plectritis macrocera var. grayi
(Under Plectritis macrocera)
Synonym (tjm2)
Plectritis macrocera var. mamillata
(Under Plectritis macrocera)
Synonym (tjm2)
Plectritis magna var. nitida
(Under Plectritis congesta subsp. brachystemon)
Synonym (tjm2)
Pleiacanthus
Pleiacanthus spinosusTHORNY SKELETONWEEDNative
Pleuraphis jamesii
(Under Hilaria jamesii)
Synonym (tjm2)
Pleuraphis rigida
(Under Hilaria rigida)
Synonym (tjm2)
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 (tjm2)
Poa
  ↳  Key to Poa
BLUE GRASS
Poa
(Under Poa secunda subsp. juncifolia)
Synonym (tjm2)
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 (tjm2)
Poa ampla
(Under Poa secunda subsp. juncifolia)
Mentioned in
a note
Poa annuaANNUAL BLUE GRASSNaturalized
Poa atropurpureaSAN BERNARDINO BLUE GRASSNative
Poa bigeloviiNative
Poa bolanderiNative
Poa bolanderi var. howellii
(Under Poa howellii)
Synonym (tjm2)
Poa bulbosaNaturalized
Poa bulbosa subsp. bulbosaWaif
Poa bulbosa subsp. viviparaNaturalized
Poa bulbosa var. bulbosa
(Under Poa bulbosa subsp. bulbosa)
Synonym (tjm2)
Poa bulbosa var. vivipara
(Under Poa bulbosa subsp. vivipara)
Synonym (tjm2)
Poa canbyi
(Under Poa secunda subsp. secunda)
Synonym (tjm2)
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 (tjm2)
Poa epilis
(Under Poa cusickii subsp. epilis)
Synonym (tjm2)
Poa fendlerianaNative
Poa fendleriana subsp. fendlerianaMUTTON GRASSNative
Poa fendleriana subsp. longiligulaLONG-TONGUE MUTTON GRASSNative
Poa fibrata
(Under Poa secunda subsp. juncifolia)
Mentioned in
a note
Poa glauca
(Under Poa glauca subsp. rupicola)
Mentioned in
a note
Poa glauca subsp. rupicolaTIMBERLINE BLUE GRASSNative
Poa gracillima
(Under Poa secunda subsp. secunda)
Synonym (tjm2)
Poa hansenii
(Under Poa cusickii subsp. cusickii)
Synonym (tjm2)
Poa hansenii
(Under Poa stebbinsii)
Mentioned in
a note
Poa howelliiNative
Poa incurva
(Under Poa secunda subsp. secunda)
Synonym (tjm2)
Poa infirmaWEAK BLUE GRASSNaturalized
Poa juncifolia
(Under Poa secunda subsp. juncifolia)
Mentioned in
a note
Poa keckiiNative
Poa kelloggiiKELLOGG'S BLUE GRASSNative
Poa leibergii
(Under Poa stebbinsii)
Mentioned in
a note
Poa lemmonii
(Under Puccinellia lemmonii)
Synonym (tjm2)
Poa leptocoma subsp. leptocomaBOG BLUE GRASSNative
Poa lettermaniiLETTERMAN'S BLUE GRASSNative
Poa longiligula
(Under Poa fendleriana subsp. longiligula)
Synonym (tjm2)
Poa macranthaSEASHORE BLUE GRASSNative
Poa napensisNAPA BLUE GRASSNative
Poa nemoralisWOOD BLUE GRASSNaturalized
Poa nemoralis subsp. nemoralis
(Under Poa nemoralis)
Synonym (tjm2)
Poa nervosa
(Under Poa wheeleri)
Synonym (tjm2)
Poa nevadensis
(Under Poa secunda subsp. juncifolia)
Mentioned in
a note
Poa palustrisFOWL BLUE GRASSNaturalized
Poa pattersonii
(Under Poa abbreviata subsp. pattersonii)
Synonym (tjm2)
Poa piperiPIPER'S BLUE GRASSNative
Poa pratensis
(Under Poa secunda subsp. juncifolia)
Mentioned in
a note
Poa pratensis subsp. agassizensis
(Under Poa pratensis subsp. pratensis)
Mentioned in
a note
Poa pratensis subsp. angustifolia
(Under Poa pratensis subsp. pratensis)
Mentioned in
a note
Poa pratensis subsp. juncifolia
(Under Poa secunda subsp. juncifolia)
Mentioned in
a note
Poa pratensis subsp. pratensisKENTUCKY BLUE GRASSNaturalized
Poa pringleiNative
Poa purpurascens
(Under Poa cusickii subsp. purpurascens)
Synonym (tjm2)
Poa rhizomataTIMBER BLUE GRASSNative
Poa rhizomata, misappl.
(Under Poa piperi)
Synonym (tjm2)
Poa rupicola
(Under Poa glauca subsp. rupicola)
Synonym (tjm2)
Poa sandbergii
(Under Poa secunda subsp. secunda)
Synonym (tjm2)
Poa scabrella
(Under Poa secunda subsp. secunda)
Synonym (tjm2)
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)
Synonym (tjm2)
Poa suksdorfii
(Under Poa keckii)
Synonym (tjm2)
Poa tenerrimaDELICATE BLUE GRASSNative
Poa trivialisROUGH BLUE GRASSNaturalized
Poa unilateralis subsp. unilateralisSAN FRANCISCO BLUE GRASSNative
Poa wheeleriNative
Poaceae
  ↳  Key to Poaceae
GRASS FAMILY
Podagrostis humilis
(Under Agrostis humilis)
Synonym (tjm2)
Podagrostis thurberiana
(Under Agrostis humilis)
Synonym (tjm2)
Podistera
Podistera nevadensisSIERRA PODISTERANative
Pogogyne
  ↳  Key to Pogogyne
BEARDSTYLE, MESA MINT
Pogogyne abramsiiSAN DIEGO MESA MINTNative
Pogogyne clareanaSANTA LUCIA MINTNative
Pogogyne douglasiiDOUGLAS' BEARDSTYLENative
Pogogyne douglasii subsp. parviflora
(Under Pogogyne douglasii)
Mentioned in
a note
Pogogyne floribundaPROFUSE-FLOWERED POGOGYNENative
Pogogyne nudiusculaOTAY MESA MINTNative
Pogogyne serpylloidesTHYMELEAF BEARDSTYLENative
Pogogyne serpylloides subsp. intermedia
(Under Pogogyne serpylloides)
Synonym (tjm2)
Pogogyne tenuiflora
(Under Pogogyne)
Mentioned in
a note
Pogogyne zizyphoroidesSACRAMENTO BEARDSTYLENative
Poinciana gilliesii
(Under Caesalpinia gilliesii)
Synonym (tjm2)
Poinciana spinosa
(Under Caesalpinia spinosa)
Synonym (tjm2)
Polanisia
Polanisia dodecandra subsp. dodecandra
(Under Polanisia dodecandra subsp. trachysperma)
Mentioned in
a note
Polanisia dodecandra subsp. trachyspermaWESTERN CLAMMYWEEDNative
Polanisia trachysperma
(Under Polanisia dodecandra subsp. trachysperma)
Synonym (tjm2)
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 (tjm2)
Polemonium pulcherrimumNative
Polemonium pulcherrimum var. pulcherrimumNative
Polemonium pulcherrimum var. shastenseNative
Polemonium shastense
(Under Polemonium pulcherrimum var. shastense)
Synonym (tjm2)
Poliomintha
Poliomintha incanaFROSTED MINTNative
Polycarpon
  ↳  Key to Polycarpon
POLYCARP
Polycarpon depressumNative
Polycarpon tetraphyllum var. tetraphyllumFOUR-LEAVED ALLSEEDNaturalized
Polyctenium
Polyctenium fremontiiNative
Polyctenium fremontii var. confertum
(Under Polyctenium fremontii)
Synonym (tjm2)
Polyctenium fremontii var. fremontii
(Under Polyctenium fremontii)
Synonym (tjm2)
Polyctenium williamsiae
(Under Polyctenium fremontii)
Synonym (tjm2)
Polygala
  ↳  Key to Polygala
MILKWORT
Polygala acanthocladaTHORNY MILKWORTNative
Polygala acanthoclada var. intricata
(Under Polygala intermontana)
Synonym (tjm2)
Polygala californicaCALIFORNIA MILKWORTNative
Polygala cornutaNative
Polygala cornuta subsp. fishiae
(Under Polygala cornuta var. fishiae)
Synonym
Polygala cornuta var. cornutaSIERRA MILKWORTNative
Polygala cornuta var. fishiaeFISH'S MILKWORTNative
Polygala cornuta var. pollardii
(Under Polygala cornuta var. fishiae)
Mentioned in
a note
Polygala heterorhynchaNOTCH-BEAKED MILKWORTNative
Polygala intermontanaINTERMOUNTAIN MILKWORTNative
Polygala subspinosaSPINY MILKWORTNative
Polygala subspinosa var. heterorhyncha
(Under Polygala heterorhyncha)
Synonym (tjm2)
PolygalaceaeMILKWORT FAMILY
Polygonaceae
  ↳  Key to Polygonaceae
BUCKWHEAT FAMILY
Polygonum
  ↳  Key to Polygonum
KNOTWEED
Polygonum aequale
(Under Polygonum aviculare subsp. depressum)
Synonym (tjm2)
Polygonum amphibium
(Under Persicaria amphibia)
Synonym (tjm2)
Polygonum amphibium var. emersum
(Under Persicaria amphibia)
Synonym (tjm2)
Polygonum amphibium var. stipulaceum
(Under Persicaria amphibia)
Synonym (tjm2)
Polygonum arenastrum
(Under Polygonum aviculare subsp. depressum)
Synonym (tjm2)
Polygonum argyrocoleonPERSIAN KNOTWEEDNaturalized
Polygonum aubertii
(Under Fallopia baldschuanica)
Synonym (tjm2)
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. rurivagumWaif
Polygonum baldschuanicum
(Under Fallopia baldschuanica)
Synonym (tjm2)
Polygonum bidwelliaeBIDWELL'S KNOTWEEDNative
Polygonum bistortoides
(Under Bistorta bistortoides)
Synonym (tjm2)
Polygonum bolanderiBOLANDER'S KNOTWEEDNative
Polygonum calcatum
(Under Polygonum aviculare subsp. depressum)
Synonym (tjm2)
Polygonum californicumNative
Polygonum capitatum
(Under Persicaria capitata)
Synonym (tjm2)
Polygonum confertiflorum
(Under Polygonum polygaloides subsp. confertiflorum)
Synonym (tjm2)
Polygonum convolvulus
(Under Fallopia convolvulus)
Synonym (tjm2)
Polygonum cuspidatum
(Under Fallopia japonica)
Synonym (tjm2)
Polygonum davisiae
(Under Aconogonon davisiae)
Synonym (tjm2)
Polygonum douglasiiDOUGLAS' KNOTWEEDNative
Polygonum douglasii subsp. austiniae
(Under Polygonum austiniae)
Synonym (tjm2)
Polygonum douglasii subsp. douglasii
(Under Polygonum douglasii)
Synonym (tjm2)
Polygonum douglasii subsp. johnstonii
(Under Polygonum sawatchense subsp. sawatchense)
Synonym (tjm2)
Polygonum douglasii subsp. majus
(Under Polygonum majus)
Synonym (tjm2)
Polygonum douglasii subsp. spergulariiforme
(Under Polygonum spergulariiforme)
Synonym (tjm2)
Polygonum douglasii var. johnstonii
(Under Polygonum sawatchense subsp. sawatchense)
Synonym (tjm2)
Polygonum douglasii var. latifolium
(Under Polygonum douglasii)
Synonym (tjm2)
Polygonum emaciatum
(Under Polygonum douglasii)
Synonym (tjm2)
Polygonum esotericum
(Under Polygonum polygaloides subsp. esotericum)
Synonym (tjm2)
Polygonum exile
(Under Polygonum sawatchense subsp. sawatchense)
Synonym (tjm2)
Polygonum exsertum
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym (tjm2)
Polygonum fowleri subsp. fowleriWaif
Polygonum fusiforme
(Under Persicaria maculosa)
Synonym (tjm2)
Polygonum hickmaniiSCOTTS VALLEY POLYGONUMNative
Polygonum hydropiper
(Under Persicaria hydropiper)
Synonym (tjm2)
Polygonum hydropiperoides
(Under Persicaria hydropiperoides)
Synonym (tjm2)
Polygonum hydropiperoides var. asperifolia
(Under Persicaria hydropiperoides)
Synonym (tjm2)
Polygonum interior
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym (tjm2)
Polygonum kelloggii
(Under Polygonum polygaloides)
Mentioned in
a note
Polygonum kelloggii
(Under Polygonum polygaloides subsp. kelloggii)
Synonym (tjm2)
Polygonum kelloggii var. confertiflorum
(Under Polygonum polygaloides subsp. confertiflorum)
Synonym (tjm2)
Polygonum lapathifolium
(Under Persicaria lapathifolia)
Synonym (tjm2)
Polygonum lapathifolium var. salicifolium
(Under Persicaria lapathifolia)
Synonym (tjm2)
Polygonum latum
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym (tjm2)
Polygonum leptocarpum
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym (tjm2)
Polygonum majusWIRY KNOTWEEDNative
Polygonum marinenseMARIN KNOTWEEDNative
Polygonum microspermum
(Under Polygonum aviculare subsp. depressum)
Synonym (tjm2)
Polygonum minimumNative
Polygonum montanum
(Under Polygonum douglasii)
Synonym (tjm2)
Polygonum montereyense
(Under Polygonum aviculare subsp. depressum)
Mentioned in
a note
Polygonum newberryi
(Under Aconogonon newberryi)
Synonym (tjm2)
Polygonum omissum
(Under Persicaria pensylvanica)
Synonym (tjm2)
Polygonum paronychiaNative
Polygonum parryiPARRY'S or PRICKLY KNOTWEEDNative
Polygonum patulum
(Under Polygonum ramosissimum)
Synonym (tjm2)
Polygonum pensylvanicum
(Under Persicaria pensylvanica)
Synonym (tjm2)
Polygonum pensylvanicum var. durum
(Under Persicaria pensylvanica)
Synonym (tjm2)
Polygonum pensylvanicum var. eglandulosum
(Under Persicaria pensylvanica)
Synonym (tjm2)
Polygonum pensylvanicum var. laevigatum
(Under Persicaria pensylvanica)
Synonym (tjm2)
Polygonum pensylvanicum var. nesophilum
(Under Persicaria pensylvanica)
Synonym (tjm2)
Polygonum pensylvanicum var. rosiflorum
(Under Persicaria pensylvanica)
Synonym (tjm2)
Polygonum persicaria
(Under Persicaria maculosa)
Synonym (tjm2)
Polygonum phytolaccifolium
(Under Aconogonon phytolaccifolium)
Synonym (tjm2)
Polygonum polygaloidesPOLYGALA KNOTWEEDNative
Polygonum polygaloides subsp. confertiflorumNative
Polygonum polygaloides subsp. confertiflorum
(Under Polygonum polygaloides subsp. confertiflorum)
Synonym (tjm2)
Polygonum polygaloides subsp. esotericumMODOC COUNTY KNOTWEEDNative
Polygonum polygaloides subsp. kelloggiiNative
Polygonum polygaloides subsp. polygaloides
(Under Polygonum polygaloides)
Mentioned in
a note
Polygonum polystachyum
(Under Persicaria wallichii)
Synonym (tjm2)
Polygonum prolificum
(Under Polygonum ramosissimum subsp. prolificum)
Synonym (tjm2)
Polygonum punctatum
(Under Persicaria punctata)
Synonym (tjm2)
Polygonum punctatum var. confertiflorum
(Under Persicaria punctata)
Synonym (tjm2)
Polygonum punctatum var. ellipticum
(Under Persicaria punctata)
Synonym (tjm2)
Polygonum punctatum var. leptostachyum
(Under Persicaria punctata)
Synonym (tjm2)
Polygonum punctatum var. parviflorum
(Under Persicaria punctata)
Synonym (tjm2)
Polygonum puritanorum
(Under Persicaria maculosa)
Synonym (tjm2)
Polygonum ramosissimumBUSHY KNOTWEEDNative
Polygonum ramosissimum subsp. prolificumNaturalized
Polygonum ramosissimum subsp. ramosissimumNative
Polygonum ramosissimum var. prolificum
(Under Polygonum ramosissimum subsp. prolificum)
Synonym (tjm2)
Polygonum sachalinense
(Under Fallopia sachalinensis)
Synonym (tjm2)
Polygonum sawatchenseNative
Polygonum sawatchense subsp. obliviumNative
Polygonum sawatchense subsp. sawatchenseNative
Polygonum scabrum
(Under Persicaria lapathifolia)
Synonym (tjm2)
Polygonum sect. Aconogonon Meisn.
(Under Aconogonon)
Synonym
Polygonum shastenseNative
Polygonum spergulariiformeNative
Polygonum stevensii
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym (tjm2)
Polygonum torreyi
(Under Polygonum minimum)
Synonym (tjm2)
Polygonum triandrum
(Under Polygonum sawatchense subsp. sawatchense)
Synonym (tjm2)
Polygonum triangulum
(Under Polygonum ramosissimum subsp. ramosissimum)
Synonym (tjm2)
Polygonum unifolium
(Under Polygonum polygaloides subsp. kelloggii)
Synonym (tjm2)
Polygonum watsonii
(Under Polygonum polygaloides subsp. confertiflorum)
Synonym (tjm2)
PolypodiaceaePOLYPODY FAMILY
Polypodium
  ↳  Key to Polypodium
POLYPODY
Polypodium australe
(Under Polypodium)
Mentioned in
a note
Polypodium californicumCALIFORNIA POLYPODYNative
Polypodium calirhizaNative
Polypodium glycyrrhizaLICORICE FERNNative
Polypodium hesperiumWESTERN POLYPODYNative
Polypodium scouleriLEATHER-LEAF FERNNative
Polypodium vulgare var. columbianum
(Under Polypodium hesperium)
Synonym (tjm2)
Polypogon
  ↳  Key to Polypogon
BEARD GRASS
Polypogon australisCHILEAN BEARD GRASSNaturalized
Polypogon elongatus
(Under Polypogon imberbis)
Synonym (tjm2)
Polypogon fugax
(Under Polypogon)
Mentioned in
a note
Polypogon imberbisNaturalized
Polypogon interruptusDITCH BEARD GRASSNaturalized
Polypogon maritimusMEDITERRANEAN BEARD GRASSNaturalized
Polypogon monspeliensisANNUAL BEARD GRASS, RABBITFOOT GRASSNaturalized
Polypogon semiverticillatus
(Under Polypogon viridis)
Synonym (tjm2)
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 (tjm2)
Polystichum munitum subsp. nudatum
(Under Polystichum imbricans subsp. imbricans)
Synonym (tjm2)
Polystichum scopulinumNative
Pontederia cordata
(Under Pontederiaceae)
Mentioned in
a note
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 (tjm2)
Populus deltoides
(Under Populus nigra)
Mentioned in
a note
Populus deltoides var. fremontii
(Under Populus fremontii subsp. fremontii)
Synonym (tjm2)
Populus fremontii
(Under Populus nigra)
Mentioned in
a note
Populus fremontii
(Under Populus trichocarpa)
Mentioned in
a note
Populus fremontii subsp. fremontiiALAMO or FREMONT COTTONWOODNative
Populus fremontii var. arizonica
(Under Populus fremontii subsp. fremontii)
Synonym (tjm2)
Populus fremontii var. macdougalii
(Under Populus fremontii subsp. fremontii)
Synonym (tjm2)
Populus nigraBLACK POPLAR, LOMBARDY POPLARNaturalized
Populus nigra var. italica
(Under Populus nigra)
Synonym
Populus nigra var. italica
(Under Populus nigra)
Mentioned in
a note
Populus nigra var. nigra
(Under Populus nigra)
Mentioned in
a note
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 (tjm2)
Portulaca halimoidesDESERT PORTULACANative
Portulaca johnstonii
(Under Portulaca oleracea)
Mentioned in
a note
Portulaca nitida
(Under Portulaca oleracea)
Synonym (tjm2)
Portulaca oleraceaPURSLANENaturalized
Portulaca oleracea subsp. granulato-stellulata
(Under Portulaca oleracea)
Synonym (tjm2)
Portulaca oleracea subsp. impolita
(Under Portulaca oleracea)
Mentioned in
a note
Portulaca oleracea subsp. nitida
(Under Portulaca oleracea)
Synonym (tjm2)
Portulaca oleracea subsp. oleracea
(Under Portulaca oleracea)
Synonym (tjm2)
Portulaca oleracea subsp. papillato-stellulata
(Under Portulaca oleracea)
Synonym (tjm2)
Portulaca papillato-stellulata
(Under Portulaca oleracea)
Synonym (tjm2)
Portulaca parvula
(Under Portulaca halimoides)
Synonym (tjm2)
Portulaca retusa
(Under Portulaca oleracea)
Synonym (tjm2)
PortulacaceaePURSLANE FAMILY
Potamogeton
  ↳  Key to Potamogeton
PONDWEED
Potamogeton alpinusNative
Potamogeton alpinus subsp. tenuifolius
(Under Potamogeton alpinus)
Synonym (tjm2)
Potamogeton alpinus var. subellipticus
(Under Potamogeton alpinus)
Synonym (tjm2)
Potamogeton alpinus var. tenuifolius
(Under Potamogeton alpinus)
Synonym (tjm2)
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 (tjm2)
Potamogeton fibrillosus
(Under Potamogeton foliosus subsp. fibrillosus)
Synonym (tjm2)
Potamogeton filiformis
(Under Stuckenia filiformis subsp. alpina)
Mentioned in
a note
Potamogeton filiformis var. alpinus
(Under Stuckenia filiformis subsp. alpina)
Synonym (tjm2)
Potamogeton filiformis var. macounii
(Under Stuckenia filiformis subsp. alpina)
Synonym (tjm2)
Potamogeton foliosusLEAFY PONDWEEDNative
Potamogeton foliosus subsp. fibrillosusFIBROUS PONDWEEDNative
Potamogeton foliosus subsp. foliosusNative
Potamogeton foliosus var. fibrillosus
(Under Potamogeton foliosus subsp. fibrillosus)
Synonym (tjm2)
Potamogeton foliosus var. foliosus
(Under Potamogeton foliosus subsp. foliosus)
Synonym (tjm2)
Potamogeton gramineusGRASS-LEAVED PONDWEEDNative
Potamogeton illinoensisSHINING PONDWEEDNative
Potamogeton latifolius
(Under Stuckenia striata)
Synonym (tjm2)
Potamogeton natansFLOATING-LEAVED PONDWEEDNative
Potamogeton nodosusLONG-LEAVED PONDWEEDNative
Potamogeton pectinatus
(Under Stuckenia pectinata)
Synonym (tjm2)
Potamogeton praelongusWHITE-STEMMED PONDWEEDNative
Potamogeton pusillusSMALL PONDWEEDNative
Potamogeton pusillus subsp. pusillus
(Under Potamogeton pusillus)
Synonym (tjm2)
Potamogeton pusillus subsp. tenuissimus
(Under Potamogeton berchtoldii)
Synonym (tjm2)
Potamogeton pusillus var. pusillus
(Under Potamogeton pusillus)
Synonym (tjm2)
Potamogeton pusillus var. tenuissimus
(Under Potamogeton berchtoldii)
Synonym (tjm2)
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 (tjm2)
Potentilla basalticaBLACK ROCK POTENTILLANative
Potentilla beanii
(Under Potentilla concinna var. proxima)
Synonym (tjm2)
Potentilla biennisBIENNIAL or GREENE'S CINQUEFOILNative
Potentilla breweriBREWER'S CINQUEFOILNative
Potentilla bruceaeBRUCE'S CINQUEFOILNative
Potentilla callida
(Under Ivesia callida)
Synonym (tjm2)
Potentilla concinna var. proximaEARLY CINQUEFOILNative
Potentilla cristaeCRESTED POTENTILLANative
Potentilla diversifolia
(Under Potentilla glaucophylla var. glaucophylla)
Synonym (tjm2)
Potentilla drummondiiDRUMMOND'S CINQUEFOILNative
Potentilla drummondii subsp. breweri
(Under Potentilla breweri)
Synonym (tjm2)
Potentilla drummondii subsp. bruceae
(Under Potentilla bruceae)
Synonym (tjm2)
Potentilla egedei var. grandis
(Under Potentilla anserina subsp. pacifica)
Synonym (tjm2)
Potentilla elata var. dissita
(Under Horkelia californica var. elata)
Synonym (tjm2)
Potentilla flabellifoliaFAN-FOIL, FANLEAF CINQUEFOILNative
Potentilla flabellifolia var. grayi
(Under Potentilla grayi)
Synonym (tjm2)
Potentilla flabelliformis
(Under Potentilla gracilis var. flabelliformis)
Synonym (tjm2)
Potentilla flabelliformis var. inyoensis
(Under Potentilla gracilis var. elmeri)
Synonym (tjm2)
Potentilla frondosa
(Under Horkelia californica var. frondosa)
Synonym (tjm2)
Potentilla fruticosa
(Under Dasiphora fruticosa)
Synonym (tjm2)
Potentilla glandulosa
(Under Drymocallis glandulosa)
Synonym (tjm2)
Potentilla glandulosa subsp. ashlandica
(Under Drymocallis lactea var. austiniae)
Synonym (tjm2)
Potentilla glandulosa subsp. ewanii
(Under Drymocallis cuneifolia var. ewanii)
Synonym (tjm2)
Potentilla glandulosa subsp. glandulosa
(Under Drymocallis glandulosa var. glandulosa)
Synonym (tjm2)
Potentilla glandulosa subsp. globosa
(Under Drymocallis rhomboidea)
Synonym (tjm2)
Potentilla glandulosa subsp. hansenii
(Under Drymocallis hansenii)
Synonym (tjm2)
Potentilla glandulosa subsp. nevadensis
(Under Drymocallis lactea var. austiniae)
Mentioned in
a note
Potentilla glandulosa subsp. nevadensis
(Under Drymocallis lactea var. lactea)
Synonym (tjm2)
Potentilla glandulosa subsp. pseudorupestris
(Under Drymocallis pseudorupestris)
Synonym (tjm2)
Potentilla glandulosa subsp. reflexa
(Under Drymocallis glandulosa var. reflexa)
Synonym (tjm2)
Potentilla glaucophylla var. glaucophyllaBLUELEAF CINQUEFOILNative
Potentilla gracilisSLENDER CINQUEFOILNative
Potentilla gracilis subsp. nuttallii
(Under Potentilla gracilis var. fastigiata)
Synonym (tjm2)
Potentilla gracilis var. elmeriNative
Potentilla gracilis var. fastigiataNative
Potentilla gracilis var. flabelliformisNative
Potentilla gracilis var. glabrata
(Under Potentilla gracilis var. fastigiata)
Synonym (tjm2)
Potentilla gracilis var. gracilisNative
Potentilla gracilis var. permollis
(Under Potentilla gracilis var. fastigiata)
Synonym (tjm2)
Potentilla gracilis var. pulcherrima
(Under Potentilla pulcherrima)
Synonym (tjm2)
Potentilla grayiGRAY'S CINQUEFOILNative
Potentilla hickmaniiHICKMAN'S CINQUEFOILNative
Potentilla howellii
(Under Horkelia sericata)
Synonym (tjm2)
Potentilla jepsoniiJEPSON'S CINQUEFOILNative
Potentilla luteosericea
(Under Potentilla wheeleri)
Mentioned in
a note
Potentilla millefoliaFEATHER CINQUEFOILNative
Potentilla millefolia var. klamathensis
(Under Potentilla millefolia)
Mentioned in
a note
Potentilla morefieldiiMOREFIELD'S CINQUEFOILNative
Potentilla multijugaBALLONA CINQUEFOILNative
Potentilla newberryiNEWBERRY'S CINQUEFOILNative
Potentilla norvegicaNORWEGIAN or ROUGH CINQUEFOILNaturalized
Potentilla norvegica subsp. monspeliensis
(Under Potentilla norvegica)
Synonym (tjm2)
Potentilla palustris
(Under Comarum palustre)
Synonym (tjm2)
Potentilla patellifera
(Under Ivesia patellifera)
Synonym (tjm2)
Potentilla pectinisecta
(Under Potentilla gracilis var. elmeri)
Synonym (tjm2)
Potentilla peirsonii
(Under Drymocallis cuneifolia var. cuneifolia)
Synonym (tjm2)
Potentilla pensylvanicaPRAIRIE CINQUEFOILNative
Potentilla pensylvanica var. ovium
(Under Potentilla jepsonii)
Synonym (tjm2)
Potentilla pseudosericeaMONO CINQUEFOILNative
Potentilla pulcherrimaBEAUTIFUL CINQUEFOILNative
Potentilla rectaSULPHUR CINQUEFOILNaturalized
Potentilla reptans
(Under Potentilla anglica)
Mentioned in
a note
Potentilla rhomboidea
(Under Drymocallis rhomboidea)
Synonym (tjm2)
Potentilla rimicolaCLIFF CINQUEFOILNative
Potentilla rivalisBROOK or RIVER CINQUEFOILNative
Potentilla rivalis var. millegrana
(Under Potentilla rivalis)
Synonym (tjm2)
Potentilla rosulata
(Under Ivesia saxosa)
Synonym (tjm2)
Potentilla saxosa
(Under Ivesia saxosa)
Synonym (tjm2)
Potentilla saxosa subsp. sierrae
(Under Ivesia saxosa)
Synonym (tjm2)
Potentilla subvillosa
(Under Potentilla bruceae)
Synonym (tjm2)
Potentilla uliginosaCUNNINGHAM MARSH CINQUEFOILNative
Potentilla wheeleriWHEELER'S CINQUEFOILNative
Potentilla wheeleri var. rimicola
(Under Potentilla rimicola)
Synonym (tjm2)
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 (tjm2)
Primula pauciflora var. monantha
(Under Primula pauciflora)
Synonym (tjm2)
Primula pauciflora var. pauciflora
(Under Primula pauciflora)
Mentioned in
a note
Primula pauciflora var. shoshonense
(Under Primula pauciflora)
Mentioned in
a note
Primula pauciflora var. shoshonensis
(Under Primula pauciflora)
Synonym (tjm2)
Primula subalpinaNative
Primula suffrutescensSIERRA PRIMROSENative
Primula tetrandraALPINE SHOOTING STARNative
Primula tetrandra
(Under Primula tetrandra)
Synonym (tjm2)
Primulaceae
  ↳  Key to Primulaceae
PRIMROSE FAMILY
Prionopsis ciliata
(Under Grindelia)
Mentioned in
a note
Prionopsis ciliata
(Under Grindelia)
Mentioned in
a note
Probably
(Under Opuntia phaeacantha)
Synonym
Proboscidea
  ↳  Key to Proboscidea
UNICORN-PLANT
Proboscidea althaeifoliaDESERT UNICORN-PLANTNative
Proboscidea altheaefolia
(Under Proboscidea althaeifolia)
Synonym (tjm2)
Proboscidea louisianica subsp. louisianicaNaturalized
Proboscidea luteaNaturalized
Proboscidea parviflora subsp. parviflora
(Under Proboscidea)
Mentioned in
a note
Proboscidea parviflora var. hohokamiana
(Under Proboscidea)
Mentioned in
a note
Prosartes
  ↳  Key to Prosartes
Prosartes hookeriNative
Prosartes hookeri var. hookeri
(Under Prosartes hookeri)
Synonym (tjm2)
Prosartes hookeri var. parvifolia
(Under Prosartes parvifolia)
Synonym (tjm2)
Prosartes hookeri var. trachyandra
(Under Prosartes hookeri)
Synonym (tjm2)
Prosartes parvifoliaSISKIYOU BELLSNative
Prosartes smithiiNative
Prosopis
  ↳  Key to Prosopis
MESQUITE
Prosopis glandulosa var. torreyanaHONEY MESQUITENative
Prosopis juliflora var. torreyana
(Under Prosopis glandulosa var. torreyana)
Synonym (tjm2)
Prosopis juliflora var. velutina
(Under Prosopis velutina)
Synonym (tjm2)
Prosopis pubescensSCREW BEAN, TORNILLONative
Prosopis strombuliferaARGENTINE SCREWBEANWaif
Prosopis velutinaNaturalized
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 (tjm2)
Prunus andersoniiDESERT PEACHNative
Prunus armeniaca
(Under Prunus)
Mentioned in
a note
Prunus avium
(Under Prunus)
Mentioned in
a note
Prunus caroliniana
(Under Prunus)
Mentioned in
a note
Prunus cerasiferaCHERRY PLUMNaturalized
Prunus cerasus
(Under Prunus)
Mentioned in
a note
Prunus domestica
(Under Prunus)
Mentioned in
a note
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 laurocerasus
(Under Prunus)
Mentioned in
a note
Prunus lusitanica
(Under Prunus)
Mentioned in
a note
Prunus lyonii
(Under Prunus ilicifolia subsp. lyonii)
Synonym (tjm2)
Prunus mahaleb
(Under Prunus)
Mentioned in
a note
Prunus munsoniana
(Under Prunus)
Mentioned in
a note
Prunus persicaPEACHNaturalized
Prunus speciosa
(Under Prunus)
Mentioned in
a note
Prunus subcordataPACIFIC PLUM, SIERRA PLUMNative
Prunus subcordata var. oregana
(Under Prunus subcordata)
Mentioned in
a note
Prunus virginiana var. demissaWESTERN CHOKE CHERRYNative
Prunus virginiana var. virginiana
(Under Prunus virginiana var. demissa)
Mentioned in
a note
Prunus yedoensis
(Under Prunus)
Mentioned in
a note
Psathyrotes
  ↳  Key to Psathyrotes
Psathyrotes annuaNative
Psathyrotes ramosissimaTURTLEBACKNative
Pseudelymus saxicola
(Under Elymus elymoides)
Mentioned in
a note
Pseudelymus saxicola
(Under Elymus spicatus)
Mentioned in
a note
Pseudobahia
  ↳  Key to Pseudobahia
Pseudobahia bahiifoliaHARTWEG'S GOLDEN SUNBURSTNative
Pseudobahia bahiifolia var. pinnatifida
(Under Pseudobahia heermannii)
Synonym (tjm2)
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 (tjm2)
Pseudognaphalium leucocephalumWHITE RABBIT-TOBACCONative
Pseudognaphalium luteoalbumNaturalized
Pseudognaphalium macouniiMACOUN'S EVERLASTINGNative
Pseudognaphalium microcephalumNative
Pseudognaphalium microcephalum var. thermale
(Under Pseudognaphalium thermale)
Synonym (tjm2)
Pseudognaphalium ramosissimumNative
Pseudognaphalium roseumNative
Pseudognaphalium stramineumNative
Pseudognaphalium thermaleNative
Pseudoroegneria spicata
(Under Elymus spicatus)
Synonym (tjm2)
Pseudoroegneria spicata subsp. spicata
(Under Elymus spicatus)
Synonym (tjm2)
Pseudorontium
Pseudorontium cyathiferumDEEP CANYON SNAPDRAGONNative
Pseudosasa japonica
(Under Phyllostachys)
Mentioned in
a note
Pseudostellaria
  ↳  Key to Pseudostellaria
Pseudostellaria jamesianaTUBER STARWORTNative
Pseudostellaria sierraeSIERRA STARWORTNative
Pseudotrillium
Pseudotrillium rivaleBROOK WAKEROBINNative
Pseudotsuga
  ↳  Key to Pseudotsuga
Pseudotsuga macrocarpaBIGCONE DOUGLAS-FIR, BIGCONE SPRUCENative
Pseudotsuga menziesii var. menziesiiDOUGLAS-FIRNative
Psidium guajava
(Under Myrtaceae)
Mentioned in
a note
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 (tjm2)
Psilocarphus globiferus
(Under Psilocarphus chilensis)
Synonym (tjm2)
Psilocarphus oregonusOREGON WOOLLYHEADSNative
Psilocarphus tenellusSLENDER WOOLLY-MARBLESNative
Psilocarphus tenellus var. globiferus
(Under Psilocarphus brevissimus var. brevissimus)
Mentioned in
a note
Psilocarphus tenellus var. globiferus
(Under Psilocarphus chilensis)
Synonym (tjm2)
Psilocarphus tenellus var. tenellus
(Under Psilocarphus tenellus)
Synonym (tjm2)
Psilocarphus tenellus var. tenuis
(Under Psilocarphus chilensis)
Synonym (tjm2)
PsilostrophePAPER-DAISY
Psilostrophe cooperiNative
Psilotum nudum
(Under Ophioglossaceae)
Mentioned in
a note
Psoralea bituminosa
(Under Bituminaria bituminosa)
Synonym (tjm2)
Psoralea californica
(Under Pediomelum californicum)
Synonym (tjm2)
Psoralea castorea
(Under Pediomelum castoreum)
Synonym (tjm2)
Psoralea hallii var. media
(Under Hoita macrostachya)
Synonym (tjm2)
Psoralea lanceolata
(Under Ladeania lanceolata)
Synonym (tjm2)
Psoralea lanceolata subsp. scabra
(Under Ladeania lanceolata)
Synonym (tjm2)
Psoralea orbicularis
(Under Hoita orbicularis)
Synonym (tjm2)
Psoralea physodes
(Under Rupertia physodes)
Synonym (tjm2)
Psoralea rigida
(Under Rupertia rigida)
Synonym (tjm2)
Psoralea strobilina
(Under Hoita strobilina)
Synonym (tjm2)
Psoralidium lanceolatum
(Under Fabaceae)
Mentioned in
a note
Psoralidium lanceolatum
(Under Ladeania lanceolata)
Synonym (tjm2)
Psorodendron arborescens
(Under Psorothamnus arborescens var. arborescens)
Synonym (tjm2)
Psorodendron fremontii
(Under Psorothamnus fremontii var. fremontii)
Synonym (tjm2)
Psorodendron schottii
(Under Psorothamnus schottii)
Synonym (tjm2)
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 (tjm2)
Pterostegia diphylla var. biloba
(Under Pterostegia drymarioides)
Synonym (tjm2)
Pterostegia drymarioidesNative
Pterostegia microphylla
(Under Pterostegia drymarioides)
Synonym (tjm2)
Pteryxia petraea
(Under Cymopterus terebinthinus var. petraeus)
Synonym
Pteryxia terebinthina var. californica
(Under Cymopterus terebinthinus var. californicus)
Synonym
Ptilagrostis kingii
(Under Stipa kingii)
Synonym (tjm2)
Puccinellia
  ↳  Key to Puccinellia
ALKALI GRASS
Puccinellia airoides
(Under Puccinellia nuttalliana)
Synonym (tjm2)
Puccinellia californica
(Under Torreyochloa pallida var. pauciflora)
Synonym
Puccinellia distansEUROPEAN ALKALI GRASSNaturalized
Puccinellia erecta
(Under Torreyochloa erecta)
Synonym (tjm2)
Puccinellia grandis
(Under Puccinellia nutkaensis)
Synonym
Puccinellia howelliiHOWELL'S ALKALI GRASSNative
Puccinellia lemmoniiLEMMON'S ALKALI GRASSNative
Puccinellia maritima
(Under Puccinellia)
Mentioned in
a note
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
Puccinia graminis
(Under Berberis vulgaris)
Mentioned in
a note
Pugiopappus bigelovii
(Under Leptosyne bigelovii)
Synonym (tjm2)
PulicariaFALSE-FLEABANE
Pulicaria hispanica
(Under Pulicaria paludosa)
Synonym (tjm2)
Pulicaria paludosaNaturalized
PunicaPOMEGRANATE
Punica granatumNaturalized
Purpusia saxosa
(Under Ivesia arizonica var. arizonica)
Synonym (tjm2)
Purshia
  ↳  Key to Purshia
Purshia glandulosa
(Under Purshia tridentata var. glandulosa)
Synonym (tjm2)
Purshia mexicana var. stansburyana
(Under Purshia stansburyana)
Synonym (tjm2)
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 (tjm2)
Pyracantha crenulataHIMALAYAN or NEPAL FIRETHORNWaif
Pyracantha fortuneanaCHINESE FIRETHORNNaturalized
Pyracantha koidzumiiTAIWAN FIRETHORNNaturalized
Pyracantha rogersiana
(Under Pyracantha fortuneana)
Synonym (tjm2)
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 (tjm2)
Pyrola bracteata
(Under Pyrola asarifolia subsp. bracteata)
Synonym (tjm2)
Pyrola californica
(Under Pyrola asarifolia subsp. asarifolia)
Synonym (tjm2)
Pyrola chloranthaGREEN-FLOWERED WINTERGREENNative
Pyrola cryptaCRYPTIC WINTERGREENNative
Pyrola dentataTOOTHED WINTERGREENNative
Pyrola minorLESSER WINTERGREENNative
Pyrola pallida
(Under Pyrola dentata)
Synonym (tjm2)
Pyrola pictaWHITE-VEINED WINTERGREENNative
Pyrola picta f. aphylla
(Under Pyrola aphylla)
Synonym
Pyrola picta f. aphylla
(Under Pyrola picta)
Synonym (tjm2)
Pyrola picta subsp. dentata
(Under Pyrola dentata)
Synonym (tjm2)
Pyrola picta subsp. dentata
(Under Pyrola picta)
Synonym (tjm2)
Pyrola picta subsp. integra
(Under Pyrola dentata)
Synonym (tjm2)
Pyrola picta subsp. pallida
(Under Pyrola dentata)
Synonym (tjm2)
Pyrola picta var. dentata
(Under Pyrola dentata)
Synonym (tjm2)
Pyrola rotundifolia
(Under Pyrola minor)
Mentioned in
a note
Pyrola secunda
(Under Orthilia secunda)
Synonym (tjm2)
Pyrola virens
(Under Pyrola chlorantha)
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 (tjm2)
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 calleryana
(Under Pyrus)
Mentioned in
a note
Pyrus communisCOMMON PEARNaturalized
Pyrus dioica
(Under Malus pumila)
Mentioned in
a note
Pyrus malus
(Under Malus pumila)
Synonym (tjm2)