Scientific Name | Common Name | |
Packera ↳ Key to Packera | GROUNDSEL, RAGWORT, BUTTERWEED | |
Packera bernardina | SAN BERNARDINO RAGWORT | Native |
Packera bolanderi var. bolanderi | SEACOAST RAGWORT | Native |
Packera breweri | BREWER'S RAGWORT | Native |
Packera cana | WOOLLY GROUNDSEL | Native |
Packera clevelandii | CLEVELAND'S RAGWORT | Native |
Packera eurycephala | | Native |
Packera eurycephala var. eurycephala | WIDEHEAD GROUNDSEL | Native |
Packera eurycephala var. lewisrosei | LEWIS ROSE'S RAGWORT | Native |
Packera ganderi | GANDER'S RAGWORT | Native |
Packera greenei | FLAME RAGWORT | Native |
Packera hesperia | WESTERN RAGWORT | Native |
Packera indecora | RAYLESS MOUNTAIN RAGWORT | Native |
Packera ionophylla | TEHACHAPI RAGWORT | Native |
Packera layneae | LAYNE'S RAGWORT | Native |
Packera macounii | SISKIYOU MOUNTAINS RAGWORT | Native |
Packera multilobata | LOBELEAF GROUNDSEL | Native |
Packera pauciflora | ALPINE GROUNDSEL | Native |
Packera pseudaurea var. pseudaurea | FALSE-GOLD GROUNDSEL | Native |
Packera streptanthifolia var. rubricaulis (Under Packera streptanthifolia var. streptanthifolia) | | Invalid name |
Packera streptanthifolia var. rubricaulis (Under Packera streptanthifolia var. streptanthifolia) | | Invalid name |
Packera streptanthifolia var. streptanthifolia | ROCKY MOUNTAIN GROUNDSEL | Native |
Packera subnuda var. subnuda | CLEFTLEAF GROUNDSEL | Native |
Packera werneriifolia | HOARY GROUNDSEL | Native |
Paeonia ↳ Key to Paeonia | PEONY | |
Paeonia brownii | | Native |
Paeonia californica | | Native |
Paeoniaceae | PEONY FAMILY | |
Palafoxia | | |
Palafoxia arida ↳ Key to Palafoxia arida | | Native |
Palafoxia arida var. arida | | Native |
Palafoxia arida var. gigantea | GIANT SPANISH-NEEDLE | Native |
Pallenis | | |
Pallenis maritima | GOLD COIN | Naturalized |
Pancratium | | |
Pancratium maritimum | | Naturalized |
Panicum ↳ Key to Panicum | PANIC GRASS | |
Panicum acuminatum | | Native |
Panicum acuminatum var. fasciculatum | PACIFIC PANIC GRASS | Native |
Panicum acuminatum var. lindheimeri | | Native |
Panicum acuminatum var. thermale | GEYSERS PANICUM | Native |
Panicum antidotale | BLUE PANIC GRASS | Naturalized |
Panicum capillare | WITCH GRASS | Native |
Panicum capillare subsp. hillmanii (Under Panicum hillmanii) | | Synonym |
Panicum dichotomiflorum subsp. dichotomiflorum | FALL PANIC GRASS | Naturalized |
Panicum dichotomiflorum var. dichotomiflorum (Under Panicum dichotomiflorum subsp. dichotomiflorum) | | Synonym |
Panicum hillmanii | HILLMAN'S PANIC GRASS | Naturalized |
Panicum hirticaule subsp. hirticaule | ROUGHSTALK WITCH GRASS | Native |
Panicum hirticaule var. hirticaule (Under Panicum hirticaule subsp. hirticaule) | | Synonym |
Panicum huachucae (Under Panicum acuminatum var. fasciculatum) | | Synonym |
Panicum lassenianum (Under Panicum acuminatum var. thermale) | | Synonym |
Panicum lindheimeri (Under Panicum acuminatum var. lindheimeri) | | Synonym |
Panicum miliaceum subsp. miliaceum | BROOM CORN MILLET | Naturalized |
Panicum occidentale (Under Panicum acuminatum var. fasciculatum) | | Synonym |
Panicum oligosanthes var. scribnerianum | SCRIBNER'S PANIC GRASS | Native |
Panicum pacificum (Under Panicum acuminatum var. fasciculatum) | | Synonym |
Panicum rigidulum subsp. rigidulum | REDTOP PANICUM | Naturalized |
Panicum rigidulum var. rigidulum (Under Panicum rigidulum subsp. rigidulum) | | Synonym |
Panicum scribnerianum (Under Panicum oligosanthes var. scribnerianum) | | Synonym |
Panicum thermale (Under Panicum acuminatum var. thermale) | | Synonym |
Panicum urvilleanum | SILKY PANIC GRASS | Native |
Papaver ↳ Key to Papaver | | |
Papaver apulum var. micranthum (Under Papaver hybridum) | | Unabridged misapplied name |
Papaver argemone | | Waif |
Papaver californicum | FIRE POPPY | Native |
Papaver heterophyllum | WIND POPPY | Native |
Papaver hybridum | ROUGH POPPY | Naturalized |
Papaver lemmonii (Under Papaver californicum) | | Synonym |
Papaver rhoeas | CORN POPPY | Naturalized |
Papaver somniferum | OPIUM POPPY | Waif |
Papaveraceae ↳ Key to Papaveraceae | POPPY FAMILY | |
Pappostipa speciosa (Under Stipa speciosa) | | Synonym |
Parapholis ↳ Key to Parapholis | SICKLE GRASS | |
Parapholis incurva | | Naturalized |
Parapholis strigosa | | Naturalized |
Paraserianthes | | |
Paraserianthes lophantha | PLUME ALBIZIA | Naturalized |
Parathelypteris nevadensis (Under Amauropelta nevadensis) | | Synonym |
Parentucellia | | |
Parentucellia latifolia | BROADLEAF GLANDWEED | Naturalized |
Parentucellia viscosa (Under Bellardia viscosa) | | Synonym |
Parietaria ↳ Key to Parietaria | PELLITORY | |
Parietaria hespera | | Native |
Parietaria hespera var. californica | | Native |
Parietaria hespera var. hespera | | Native |
Parietaria judaica | | Naturalized |
Parietaria pensylvanica | | Native |
Parishella californica (Under Nemacladus californicus) | | Synonym |
Parkinsonia ↳ Key to Parkinsonia | PALO VERDE | |
Parkinsonia aculeata | MEXICAN PALO VERDE | Naturalized |
Parkinsonia florida | BLUE PALO VERDE | Native |
Parkinsonia microphylla | LITTLE-LEAVED PALO VERDE | Native |
Parnassia ↳ Key to Parnassia | GRASS-OF-PARNASSUS | |
Parnassia californica (Under Parnassia palustris) | | Synonym |
Parnassia cirrata | | Native |
Parnassia cirrata var. cirrata | SAN BERNARDINO GRASS-OF-PARNASSUS | Native |
Parnassia cirrata var. intermedia | CASCADE GRASS-OF-PARNASSUS | Native |
Parnassia fimbriata | | Native |
Parnassia palustris | | Native |
Parnassia palustris var. californica (Under Parnassia palustris) | | Synonym |
Parnassia palustris var. montanensis (Under Parnassia palustris) | | Synonym |
Parnassia palustris var. neogaea (Under Parnassia palustris) | | Synonym |
Parnassia palustris var. parviflora (Under Parnassia parviflora) | | Synonym |
Parnassia parviflora | SMALL-FLOWERED GRASS-OF-PARNASSUS | Native |
Parnassiaceae | GRASS-OF-PARNASSUS FAMILY | |
Paronychia ↳ Key to Paronychia | NAILWORT | |
Paronychia ahartii | AHART'S NAILWORT, AHART'S PARONYCHIA | Native |
Paronychia echinulata var. echinulata | | Naturalized |
Paronychia franciscana | | Naturalized |
Paronychia pusilla (Under Herniaria hirsuta var. cinerea) | | Synonym |
Parosela parryi (Under Marina parryi) | | Synonym |
Parrya menziesii var. glabra (Under Phoenicaulis cheiranthoides) | | Synonym |
Parthenium | FEVERFEW | |
Parthenium hysterophorus | SANTA MARIA | Naturalized |
Parthenocissus | VIRGINIA CREEPER | |
Parthenocissus inserta | WOODBINE | Naturalized |
Parthenocissus vitacea (Under Parthenocissus inserta) | | Synonym |
Parvisedum congdonii (Under Sedella pumila) | | Synonym |
Parvisedum leiocarpum (Under Sedella leiocarpa) | | Synonym |
Parvisedum pentandrum (Under Sedella pentandra) | | Synonym |
Parvisedum pumilum (Under Sedella pumila) | | Synonym |
Pascopyrum smithii (Under Elymus smithii) | | Synonym |
Paspalum ↳ Key to Paspalum | | |
Paspalum dilatatum | DALLIS GRASS | Naturalized |
Paspalum distichum | KNOT GRASS | Native |
Paspalum distichum var. indutum (Under Paspalum distichum) | | Synonym |
Paspalum paspalodes (Under Paspalum distichum) | | Synonym |
Paspalum urvillei | | Naturalized |
Paspalum vaginatum | SEASHORE PASPALUM | Naturalized |
Passiflora ↳ Key to Passiflora | PASSION FLOWER | |
Passiflora caerulea | BLUE PASSION FLOWER | Naturalized |
Passiflora mollissima (Under Passiflora tarminiana) | | Misapplied name |
Passiflora tarminiana | BANANA PASSION FRUIT | Naturalized |
Passifloraceae | PASSION FLOWER FAMILY | |
Pastinaca | PARSNIP | |
Pastinaca sativa | | Naturalized |
Paxistima | | |
Paxistima myrsinites | OREGON BOXWOOD | Native |
Pectiantia ↳ Key to Pectiantia | | |
Pectiantia breweri | | Native |
Pectiantia ovalis | | Native |
Pectiantia pentandra | | Native |
Pectis ↳ Key to Pectis | CHINCH-WEED | |
Pectis papposa var. papposa | COMMON CHINCH-WEED | Native |
Pectocarya ↳ Key to Pectocarya | PECTOCARYA, COMBSEED | |
Pectocarya anisocarpa | UNEQUAL-FRUITED PECTOCARYA | Native |
Pectocarya heterocarpa | MIXED-NUT PECTOCARYA | Native |
Pectocarya linearis subsp. ferocula | NARROW-TOOTHED PECTOCARYA | Native |
Pectocarya penicillata | NORTHERN PECTOCARYA | Native |
Pectocarya peninsularis | BAJA PECTOCARYA | Native |
Pectocarya platycarpa | WIDE-TOOTHED PECTOCARYA | Native |
Pectocarya recurvata | ARCHED-NUT PECTOCARYA | Native |
Pectocarya setosa | ROUND-NUT PECTOCARYA | Native |
Pedicularis ↳ Key to Pedicularis | LOUSEWORT | |
Pedicularis attollens | LITTLE ELEPHANT'S HEAD | Native |
Pedicularis aurantiaca | MOUNTAIN WARRIOR'S PLUME | Native |
Pedicularis bracteosa var. flavida | YELLOWISH LOUSEWORT | Native |
Pedicularis centranthera | GREAT BASIN LOUSEWORT | Native |
Pedicularis contorta | CURVED-BEAK LOUSEWORT | Native |
Pedicularis crenulata | SCALLOPED-LEAVED LOUSEWORT | Native |
Pedicularis crenulata f. candida (Under Pedicularis crenulata) | | Synonym |
Pedicularis crenulata subsp. candida (Under Pedicularis crenulata) | | Synonym |
Pedicularis densiflora | WARRIOR'S PLUME | Native |
Pedicularis densiflora subsp. aurantiaca (Under Pedicularis aurantiaca) | | Synonym |
Pedicularis dudleyi | DUDLEY'S LOUSEWORT | Native |
Pedicularis flavida (Under Pedicularis bracteosa var. flavida) | | Synonym |
Pedicularis groenlandica | ELEPHANT'S HEAD | Native |
Pedicularis groenlandica var. surrecta (Under Pedicularis groenlandica) | | Synonym |
Pedicularis howellii | HOWELL'S LOUSEWORT | Native |
Pedicularis racemosa | LEAFY LOUSEWORT | Native |
Pedicularis rigginsiae | ARROYO DE LA CRUZ LOUSEWORT | Native |
Pedicularis semibarbata | | Native |
Pediomelum ↳ Key to Pediomelum | BREADROOT | |
Pediomelum californicum | | Native |
Pediomelum castoreum | BEAVER DAM BREADROOT | Native |
Peganum | HARMAL | |
Peganum harmala | AFRICAN RUE, SYRIAN RUE | Naturalized |
Pelargonium ↳ Key to Pelargonium | GARDEN GERANIUM | |
Pelargonium ×hortorum | FISH GERANIUM | Naturalized |
Pelargonium capitatum | | Waif |
Pelargonium grossularioides | | Naturalized |
Pelargonium inquinans | | Naturalized |
Pelargonium panduriforme | OAK-LEAVED GERANIUM | Naturalized |
Pelargonium peltatum | IVY GERANIUM | Waif |
Pelargonium vitifolium | | Waif |
Pelargonium zonale | HORSESHOE GERANIUM | Waif |
Pelazoneuron | | |
Pelazoneuron puberulum var. sonorense | SONORAN MAIDEN FERN | Native |
Pelecyphora alversonii (Under Escobaria alversonii) | | Synonym |
Pellaea ↳ Key to Pellaea | CLIFF-BRAKE | |
Pellaea andromedifolia | COFFEE FERN | Native |
Pellaea brachyptera | SIERRA CLIFF-BRAKE | Native |
Pellaea breweri | BREWER'S CLIFF-BRAKE | Native |
Pellaea bridgesii | BRIDGES' CLIFF-BRAKE | Native |
Pellaea mucronata | BIRD'S-FOOT FERN | Native |
Pellaea mucronata var. californica | | Native |
Pellaea mucronata var. mucronata | | Native |
Pellaea truncata | SPINY CLIFF-BRAKE | Native |
Pellaea wrightiana var. californica (Under Pellaea mucronata var. californica) | | Synonym |
Peltandra | | |
Peltandra virginica | GREEN ARROW ARUM, TUCKAHOE | Waif |
Peltiphyllum peltatum (Under Darmera peltata) | | Synonym |
Pennisetum ↳ Key to Pennisetum | FOUNTAIN GRASS | |
Pennisetum ciliare | BUFFEL GRASS | Naturalized |
Pennisetum clandestinum | KIKUYU GRASS | Naturalized |
Pennisetum setaceum | CRIMSON FOUNTAIN GRASS | Naturalized |
Pennisetum villosum | FEATHERTOP | Naturalized |
Penstemon ↳ Key to Penstemon | BEARDTONGUE | |
Penstemon albomarginatus | WHITE-MARGINED BEARDTONGUE | Native |
Penstemon anguineus | | Native |
Penstemon austinii (Under Penstemon floridus var. austinii) | | Synonym |
Penstemon azureus | | Native |
Penstemon azureus subsp. angustissimus (Under Penstemon azureus var. angustissimus) | | Synonym |
Penstemon azureus subsp. azureus (Under Penstemon azureus var. azureus) | | Synonym |
Penstemon azureus var. angustissimus | | Native |
Penstemon azureus var. azureus | | Native |
Penstemon barnebyi | BARNEBY'S BEARDTONGUE | Native |
Penstemon bicolor | | Native |
Penstemon bicolor subsp. roseus (Under Penstemon bicolor) | | Synonym |
Penstemon bridgesii (Under Penstemon rostriflorus) | | Synonym |
Penstemon bryantiae (Under Penstemon palmeri var. palmeri) | | Synonym |
Penstemon caesius | | Native |
Penstemon calcareus | LIMESTONE BEARDTONGUE | Native |
Penstemon californicus | CALIFORNIA BEARDTONGUE | Native |
Penstemon centranthifolius | SCARLET BUGLER | Native |
Penstemon cinicola | ASH BEARDTONGUE | Native |
Penstemon clevelandii | | Native |
Penstemon clevelandii var. clevelandii | | Native |
Penstemon clevelandii var. connatus | SAN JACINTO BEARDTONGUE | Native |
Penstemon clevelandii var. mohavensis | | Native |
Penstemon confusus subsp. patens (Under Penstemon patens) | | Synonym |
Penstemon confusus var. patens (Under Penstemon patens) | | Synonym |
Penstemon cordifolius (Under Keckiella cordifolia) | | Synonym |
Penstemon davidsonii var. davidsonii | | Native |
Penstemon deustus | HOT-ROCK PENSTEMON | Native |
Penstemon deustus subsp. heterander (Under Penstemon deustus var. pedicellatus) | | Synonym |
Penstemon deustus subsp. sudans (Under Penstemon sudans) | | Synonym |
Penstemon deustus var. deustus | | Native |
Penstemon deustus var. pedicellatus | | Native |
Penstemon deustus var. savagei (Under Penstemon deustus var. suffrutescens) | | Synonym |
Penstemon deustus var. suffrutescens | | Native |
Penstemon eatonii | | Native |
Penstemon eatonii var. eatonii | | Native |
Penstemon eatonii var. undosus | | Native |
Penstemon filiformis | THREAD-LEAVED BEARDTONGUE | Native |
Penstemon floridus | | Native |
Penstemon floridus var. austinii | | Native |
Penstemon floridus var. floridus | | Native |
Penstemon fruticiformis | | Native |
Penstemon fruticiformis subsp. amargosae (Under Penstemon fruticiformis var. amargosae) | | Synonym |
Penstemon fruticiformis subsp. fruticiformis (Under Penstemon fruticiformis var. fruticiformis) | | Synonym |
Penstemon fruticiformis var. amargosae | AMARGOSA BEARDTONGUE | Native |
Penstemon fruticiformis var. fruticiformis | | Native |
Penstemon gracilentus | | Native |
Penstemon grinnellii | | Native |
Penstemon grinnellii subsp. grinnellii (Under Penstemon grinnellii var. grinnellii) | | Synonym |
Penstemon grinnellii subsp. scrophularioides (Under Penstemon grinnellii var. scrophularioides) | | Synonym |
Penstemon grinnellii var. grinnellii | | Native |
Penstemon grinnellii var. scrophularioides | | Native |
Penstemon heterodoxus | | Native |
Penstemon heterodoxus var. cephalophorus | | Native |
Penstemon heterodoxus var. heterodoxus | | Native |
Penstemon heterodoxus var. shastensis | SHASTA BEARDTONGUE | Native |
Penstemon heterophyllus | | Native |
Penstemon heterophyllus subsp. australis (Under Penstemon heterophyllus var. australis) | | Synonym |
Penstemon heterophyllus subsp. heterophyllus (Under Penstemon heterophyllus var. heterophyllus) | | Synonym |
Penstemon heterophyllus subsp. purdyi (Under Penstemon heterophyllus var. purdyi) | | Synonym |
Penstemon heterophyllus var. australis | | Native |
Penstemon heterophyllus var. heterophyllus | | Native |
Penstemon heterophyllus var. purdyi | | Native |
Penstemon hians (Under Penstemon grinnellii var. grinnellii) | | Synonym |
Penstemon humilis subsp. humilis (Under Penstemon humilis var. humilis) | | Synonym |
Penstemon humilis var. humilis | | Native |
Penstemon incertus | | Native |
Penstemon jacintensis (Under Keckiella rothrockii var. jacintensis) | | Synonym |
Penstemon janishiae | JANISH'S BEARDTONGUE | Native |
Penstemon labrosus | | Native |
Penstemon laetus | | Native |
Penstemon laetus subsp. laetus (Under Penstemon laetus var. laetus) | | Synonym |
Penstemon laetus subsp. leptosepalus (Under Penstemon laetus var. leptosepalus) | | Synonym |
Penstemon laetus subsp. roezlii (Under Penstemon roezlii) | | Synonym |
Penstemon laetus subsp. sagittatus (Under Penstemon laetus var. sagittatus) | | Synonym |
Penstemon laetus var. laetus | | Native |
Penstemon laetus var. leptosepalus | | Native |
Penstemon laetus var. sagittatus | | Native |
Penstemon lemmonii (Under Keckiella lemmonii) | | Synonym |
Penstemon linarioides var. californicus (Under Penstemon californicus) | | Synonym |
Penstemon miser (Under Penstemon janishiae) | | Unabridged misapplied name |
Penstemon monoensis | | Native |
Penstemon nemorosus (Under Nothochelone nemorosa) | | Synonym |
Penstemon neotericus | PLUMAS COUNTY BEARDTONGUE | Native |
Penstemon newberryi | | Native |
Penstemon newberryi subsp. berryi (Under Penstemon newberryi var. berryi) | | Synonym |
Penstemon newberryi subsp. newberryi (Under Penstemon newberryi var. newberryi) | | Synonym |
Penstemon newberryi subsp. sonomensis (Under Penstemon newberryi var. sonomensis) | | Synonym |
Penstemon newberryi var. berryi | | Native |
Penstemon newberryi var. newberryi | | Native |
Penstemon newberryi var. sonomensis | SONOMA BEARDTONGUE | Native |
Penstemon oreocharis (Under Penstemon rydbergii var. oreocharis) | | Synonym |
Penstemon pahutensis | PAHUTE BEARDTONGUE | Native |
Penstemon palmeri var. palmeri | | Native |
Penstemon papillatus | INYO BEARDTONGUE | Native |
Penstemon parvulus | | Native |
Penstemon patens | | Native |
Penstemon peirsonii (Under Penstemon grinnellii var. scrophularioides) | | Synonym |
Penstemon personatus | CLOSED-THROATED BEARDTONGUE | Native |
Penstemon procerus | | Native |
Penstemon procerus var. brachyanthus | | Native |
Penstemon procerus var. formosus | | Native |
Penstemon pseudospectabilis | | Native |
Penstemon purpusii | SNOW MOUNTAIN BEARDTONGUE | Native |
Penstemon rattanii | | Native |
Penstemon rattanii subsp. kleei (Under Penstemon rattanii var. kleei) | | Synonym |
Penstemon rattanii subsp. rattanii (Under Penstemon rattanii var. rattanii) | | Synonym |
Penstemon rattanii var. kleei | SANTA CRUZ MOUNTAINS BEARDTONGUE | Native |
Penstemon rattanii var. rattanii | | Native |
Penstemon roezlii | | Native |
Penstemon rostriflorus | | Native |
Penstemon rupicola | | Native |
Penstemon rydbergii var. oreocharis | | Native |
Penstemon scapoides | PINYON BEARDTONGUE | Native |
Penstemon scrophularioides (Under Penstemon grinnellii var. scrophularioides) | | Synonym |
Penstemon shastensis (Under Penstemon heterodoxus var. shastensis) | | Synonym |
Penstemon speciosus | | Native |
Penstemon speciosus subsp. kennedyi (Under Penstemon speciosus) | | Synonym |
Penstemon spectabilis | | Native |
Penstemon spectabilis subsp. spectabilis (Under Penstemon spectabilis var. spectabilis) | | Synonym |
Penstemon spectabilis subsp. subviscosus (Under Penstemon spectabilis var. subviscosus) | | Synonym |
Penstemon spectabilis var. spectabilis | | Native |
Penstemon spectabilis var. subviscosus | | Native |
Penstemon stephensii | STEPHENS' BEARDTONGUE | Native |
Penstemon sudans | SUSANVILLE BEARDTONGUE | Native |
Penstemon thompsoniae | THOMPSON'S BEARDTONGUE | Native |
Penstemon thompsoniae subsp. thompsoniae (Under Penstemon thompsoniae) | | Synonym |
Penstemon thurberi | THURBER'S BEARDTONGUE | Native |
Penstemon tracyi | TRACY'S BEARDTONGUE | Native |
Penstemon utahensis | UTAH BEARDTONGUE | Native |
Penstemon venustus | | Naturalized |
Pentachaeta ↳ Key to Pentachaeta | | |
Pentachaeta alsinoides | | Native |
Pentachaeta aurea | | Native |
Pentachaeta aurea subsp. allenii | ALLEN'S PENTACHAETA | Native |
Pentachaeta aurea subsp. aurea | GOLDEN-RAYED PENTACHAETA | Native |
Pentachaeta bellidiflora | WHITE-RAYED PENTACHAETA | Native |
Pentachaeta exilis | | Native |
Pentachaeta exilis subsp. aeolica | SAN BENITO PENTACHAETA | Native |
Pentachaeta exilis subsp. exilis | | Native |
Pentachaeta fragilis | FRAGILE PENTACHAETA | Native |
Pentachaeta lyonii | LYON'S PENTACHAETA | Native |
Pentagramma ↳ Key to Pentagramma | GOLDBACK or SILVERBACK FERN | |
Pentagramma glanduloviscida | SAN DIEGO SILVERBACK FERN | Native |
Pentagramma maxonii | DESERT SILVERBACK FERN | Native |
Pentagramma pallida | FROSTY SILVERBACK FERN | Native |
Pentagramma rebmanii | REBMAN'S SILVERBACK FERN | Native |
Pentagramma triangularis | GOLDBACK FERN | Native |
Pentagramma triangularis subsp. maxonii (Under Pentagramma maxonii) | | Synonym |
Pentagramma triangularis subsp. rebmanii (Under Pentagramma rebmanii) | | Synonym |
Pentagramma triangularis subsp. semipallida (Under Pentagramma triangularis) | | Synonym |
Pentagramma triangularis subsp. viscosa (Under Pentagramma viscosa) | | Synonym |
Pentagramma viscosa | COASTAL SILVERBACK FERN | Native |
Pentaphylloides fruticosa (Under Dasiphora fruticosa) | | Synonym |
Peplis portula (Under Lythrum portula) | | Synonym |
Peraphyllum | | |
Peraphyllum ramosissimum | | Native |
Perezia microcephala (Under Acourtia microcephala) | | Synonym |
Pericome | | |
Pericome caudata | | Native |
Perideridia ↳ Key to Perideridia | YAMPAH | |
Perideridia bacigalupii | BACIGALUPI'S YAMPAH | Native |
Perideridia bolanderi | | Native |
Perideridia bolanderi subsp. bolanderi | | Native |
Perideridia bolanderi subsp. involucrata | | Native |
Perideridia californica | | Native |
Perideridia gairdneri | | Native |
Perideridia gairdneri subsp. borealis | | Native |
Perideridia gairdneri subsp. gairdneri | GAIRDNER'S YAMPAH | Native |
Perideridia howellii | | Native |
Perideridia kelloggii | | Native |
Perideridia lemmonii | | Native |
Perideridia leptocarpa | NARROW-SEEDED YAMPAH | Native |
Perideridia oregana | | Native |
Perideridia parishii | | Native |
Perideridia parishii subsp. latifolia | | Native |
Perideridia parishii subsp. parishii | PARISH'S YAMPAH | Native |
Perideridia pringlei | ADOBE YAMPAH | Native |
Peritoma arborea (Under Cleomella arborea) | | Synonym |
Peritoma arborea var. angustata (Under Cleomella arborea var. angustata) | | Synonym |
Peritoma arborea var. arborea (Under Cleomella arborea var. arborea) | | Synonym |
Peritoma arborea var. globosa (Under Cleomella arborea var. globosa) | | Synonym |
Peritoma jonesii (Under Cleomella jonesii) | | Synonym |
Peritoma lutea (Under Cleomella lutea) | | Synonym |
Peritoma platycarpa (Under Cleomella platycarpa) | | Synonym |
Peritoma serrulata (Under Cleomella serrulata) | | Synonym |
Perityle | ROCK DAISY | |
Perityle emoryi | EMORY'S ROCK DAISY | Native |
Perityle intricata (Under Laphamia intricata) | | Synonym |
Perityle inyoensis (Under Laphamia inyoensis) | | Synonym |
Perityle megalocephala var. intricata (Under Laphamia intricata) | | Synonym |
Perityle megalocephala var. megalocephala (Under Laphamia megalocephala var. megalocephala) | | Synonym |
Perityle megalocephala var. oligophylla (Under Laphamia megalocephala var. oligophylla) | | Synonym |
Perityle villosa (Under Laphamia villosa) | | Synonym |
Persea | RED BAY | |
Persea americana | AVOCADO | Waif |
Persicaria ↳ Key to Persicaria | SMARTWEED | |
Persicaria amphibia | WATER SMARTWEED | Native |
Persicaria amphibia var. emersa (Under Persicaria amphibia) | | Synonym |
Persicaria amphibia var. stipulacea (Under Persicaria amphibia) | | Synonym |
Persicaria capitata | | Naturalized |
Persicaria coccinea (Under Persicaria amphibia) | | Synonym |
Persicaria fusiformis (Under Persicaria maculosa) | | Synonym |
Persicaria hydropiper | WATERPEPPER | Naturalized |
Persicaria hydropiperoides | FALSE WATERPEPPER | Native |
Persicaria lapathifolia | WILLOW WEED | Native |
Persicaria maculosa | LADY'S THUMB | Naturalized |
Persicaria mississippiensis (Under Persicaria pensylvanica) | | Synonym |
Persicaria opelousana (Under Persicaria hydropiperoides) | | Synonym |
Persicaria orientalis | KISS-ME-OVER-THE-GARDEN-GATE | Waif |
Persicaria paludicola (Under Persicaria hydropiperoides) | | Synonym |
Persicaria pensylvanica | PINKWEED | Naturalized |
Persicaria pensylvanica var. dura (Under Persicaria pensylvanica) | | Synonym |
Persicaria polystachya (Under Persicaria wallichii) | | Illegitimate name |
Persicaria punctata | | Native |
Persicaria wallichii | HIMALAYAN KNOTWEED | Naturalized |
Petalonyx ↳ Key to Petalonyx | SANDPAPER-PLANT | |
Petalonyx gilmanii (Under Petalonyx thurberi subsp. gilmanii) | | Synonym |
Petalonyx linearis | | Native |
Petalonyx nitidus | | Native |
Petalonyx thurberi | | Native |
Petalonyx thurberi subsp. gilmanii | DEATH VALLEY SANDPAPER-PLANT | Native |
Petalonyx thurberi subsp. thurberi | | Native |
Petalostemon ornatus (Under Dalea ornata) | | Synonym |
Petalostemon searlsiae (Under Dalea searlsiae) | | Synonym |
Petasites | | |
Petasites frigidus var. palmatus | WESTERN SWEET COLTSFOOT | Native |
Peteria | | |
Peteria thompsoniae | SPINE-NODED MILKVETCH | Native |
Petradoria | | |
Petradoria pumila subsp. pumila (Under Petradoria pumila var. pumila) | | Synonym |
Petradoria pumila var. pumila | ROCK-GOLDENROD | Native |
Petrophyton caespitosum (Under Petrophytum caespitosum) | | Orthographic variant |
Petrophyton caespitosum subsp. acuminatum (Under Petrophytum caespitosum subsp. acuminatum) | | Orthographic variant |
Petrophyton caespitosum subsp. caespitosum (Under Petrophytum caespitosum subsp. caespitosum) | | Orthographic variant |
Petrophytum | | |
Petrophytum caespitosum ↳ Key to Petrophytum caespitosum | | Native |
Petrophytum caespitosum subsp. acuminatum | | Native |
Petrophytum caespitosum subsp. caespitosum | | Native |
Petrorhagia ↳ Key to Petrorhagia | | |
Petrorhagia dubia | | Naturalized |
Petrorhagia nanteuilii | | Naturalized |
Petrorhagia prolifera | PROLIFEROUS PINK | Naturalized |
Petrorhagia velutina (Under Petrorhagia dubia) | | Synonym |
Petroselinum | | |
Petroselinum crispum | PARSLEY | Waif |
Petunia | | |
Petunia parviflora | | Native |
Peucephyllum | PYGMY-CEDAR | |
Peucephyllum schottii | | Native |
Phacelia ↳ Key to Phacelia | | |
Phacelia acanthominthoides (Under Phacelia ciliata) | | Synonym |
Phacelia adenophora | | Native |
Phacelia affinis | | Native |
Phacelia aldersonii (Under Phacelia davidsonii) | | Synonym |
Phacelia alpina (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia alvordensis (Under Phacelia distans) | | Synonym |
Phacelia amabilis | SALINE VALLEY PHACELIA | Native |
Phacelia ambigua var. minutiflora (Under Phacelia crenulata var. minutiflora) | | Synonym |
Phacelia ammophila (Under Phacelia distans) | | Synonym |
Phacelia anelsonii | AVEN NELSON'S PHACELIA | Native |
Phacelia argentea | SAND DUNE PHACELIA | Native |
Phacelia arthuri (Under Phacelia distans) | | Synonym |
Phacelia austromontana | | Native |
Phacelia barnebyana | BARNEBY'S PHACELIA | Native |
Phacelia bicolor | | Native |
Phacelia bicolor var. bicolor (Under Phacelia bicolor) | | Synonym |
Phacelia biennis (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia biolettii (Under Phacelia californica) | | Synonym |
Phacelia bolanderi | | Native |
Phacelia brachyloba | | Native |
Phacelia brannanii (Under Phacelia fremontii) | | Synonym |
Phacelia breweri | | Native |
Phacelia burkei (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia californica | | Native |
Phacelia californica var. bernardina (Under Phacelia imbricata var. bernardina) | | Synonym |
Phacelia californica var. egena (Under Phacelia egena) | | Synonym |
Phacelia californica var. jacintensis (Under Phacelia mutabilis) | | Synonym |
Phacelia californica var. patula (Under Phacelia imbricata var. patula) | | Synonym |
Phacelia californica var. rotundata (Under Phacelia argentea) | | Synonym |
Phacelia californica var. rubacea (Under Phacelia heterophylla var. virgata) | | Synonym |
Phacelia californica var. virgata (Under Phacelia heterophylla var. virgata) | | Synonym |
Phacelia calthifolia | | Native |
Phacelia campanularia | DESERT BLUEBELLS | Native |
Phacelia campanularia subsp. campanularia (Under Phacelia campanularia var. campanularia) | | Synonym |
Phacelia campanularia subsp. vasiformis (Under Phacelia campanularia var. vasiformis) | | Synonym |
Phacelia campanularia var. campanularia | | Native |
Phacelia campanularia var. vasiformis | | Native |
Phacelia campestris (Under Phacelia ivesiana) | | Synonym |
Phacelia canescens (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia cicutaria | | Native |
Phacelia cicutaria subsp. hispida (Under Phacelia cicutaria var. hispida) | | Synonym |
Phacelia cicutaria var. cicutaria | | Native |
Phacelia cicutaria var. eximia (Under Phacelia cicutaria var. hispida) | | Synonym |
Phacelia cicutaria var. hispida | | Native |
Phacelia cicutaria var. hubbyi (Under Phacelia hubbyi) | | Synonym |
Phacelia ciliata | | Native |
Phacelia ciliosa (Under Phacelia sericea var. ciliosa) | | Synonym |
Phacelia cinerea (Under Phacelia distans) | | Synonym |
Phacelia circinata var. integrifolia (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia circinatiformis (Under Phacelia phacelioides) | | Synonym |
Phacelia coerulea | SKY-BLUE PHACELIA | Native |
Phacelia compacta (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia congdonii | | Native |
Phacelia conmixta (Under Phacelia distans) | | Synonym |
Phacelia cookei | COOKE'S PHACELIA | Native |
Phacelia cooperae (Under Phacelia brachyloba) | | Synonym |
Phacelia corymbosa | | Native |
Phacelia crassifolia (Under Phacelia gymnoclada) | | Synonym |
Phacelia crenulata | | Native |
Phacelia crenulata var. ambigua | | Native |
Phacelia crenulata var. crenulata | | Native |
Phacelia crenulata var. funerea (Under Phacelia crenulata var. crenulata) | | Synonym |
Phacelia crenulata var. minutiflora | | Native |
Phacelia cryptantha | | Native |
Phacelia cryptantha var. derivata (Under Phacelia cryptantha) | | Synonym |
Phacelia curvipes | | Native |
Phacelia curvipes var. davidsonii (Under Phacelia davidsonii) | | Synonym |
Phacelia curvipes var. insularis (Under Phacelia insularis var. insularis) | | Synonym |
Phacelia curvipes var. macrantha (Under Phacelia davidsonii) | | Synonym |
Phacelia curvipes var. pratensis (Under Phacelia davidsonii) | | Synonym |
Phacelia curvipes var. yosemitana (Under Phacelia vallicola) | | Synonym |
Phacelia dalesiana (Under Howellanthus dalesianus) | | Synonym |
Phacelia damnationensis | DAMNATION PASS PHACELIA | Native |
Phacelia dasyphylla (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia dasyphylla var. ophitidis (Under Phacelia corymbosa) | | Synonym |
Phacelia davidsonii | | Native |
Phacelia davidsonii var. macrantha (Under Phacelia davidsonii) | | Synonym |
Phacelia distans | | Native |
Phacelia distans subvar. ammophila (Under Phacelia distans) | | Synonym |
Phacelia distans subvar. genuina (Under Phacelia distans) | | Synonym |
Phacelia distans subvar. leptostachya (Under Phacelia distans) | | Synonym |
Phacelia distans var. australis (Under Phacelia distans) | | Synonym |
Phacelia distans var. scabrella (Under Phacelia distans) | | Synonym |
Phacelia divaricata | | Native |
Phacelia divaricata var. congdonii (Under Phacelia congdonii) | | Synonym |
Phacelia divaricata var. continentis (Under Phacelia insularis var. continentis) | | Synonym |
Phacelia divaricata var. insularis (Under Phacelia insularis var. insularis) | | Synonym |
Phacelia dociana (Under Phacelia quickii) | | Synonym |
Phacelia douglasii | | Native |
Phacelia douglasii subsp. cryptantha (Under Phacelia stellaris) | | Synonym |
Phacelia douglasii var. cryptantha (Under Phacelia stellaris) | | Synonym |
Phacelia egena | | Native |
Phacelia eisenii | | Native |
Phacelia eremica (Under Phacelia cryptantha) | | Synonym |
Phacelia exilis | TRANSVERSE RANGE PHACELIA | Native |
Phacelia eximia (Under Phacelia cicutaria var. hispida) | | Synonym |
Phacelia flaccida (Under Phacelia rattanii) | | Synonym |
Phacelia floribunda | MANY-FLOWERED PHACELIA | Native |
Phacelia fremontii | | Native |
Phacelia frigida (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia frigida subsp. dasyphylla (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia frigida subsp. frigida (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia geraniifolia (Under Phacelia perityloides var. jaegeri) | | Synonym |
Phacelia glandulifera | | Native |
Phacelia gooddingii (Under Phacelia pulchella var. gooddingii) | | Synonym |
Phacelia grandiflora | | Native |
Phacelia greenei | SCOTT VALLEY PHACELIA | Native |
Phacelia grisea | | Native |
Phacelia gymnoclada | NAKED-STEMMED PHACELIA | Native |
Phacelia hallii (Under Phacelia fremontii) | | Synonym |
Phacelia hastata | | Native |
Phacelia hastata subsp. compacta (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia hastata subsp. hastata (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia hastata var. alpina (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia hastata var. compacta | | Native |
Phacelia hastata var. dasyphylla (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia hastata var. hastata | | Native |
Phacelia hastata var. leucophylla (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia heterophylla subsp. virgata (Under Phacelia heterophylla var. virgata) | | Synonym |
Phacelia heterophylla var. alpina (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia heterophylla var. compacta (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia heterophylla var. dasyphylla (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia heterophylla var. frigida (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia heterophylla var. griseophylla (Under Phacelia mutabilis) | | Synonym |
Phacelia heterophylla var. pseudohispida (Under Phacelia mutabilis) | | Synonym |
Phacelia heterophylla var. pygmaea (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia heterophylla var. rotundata (Under Phacelia argentea) | | Synonym |
Phacelia heterophylla var. virgata | | Native |
Phacelia heterosperma (Under Phacelia lemmonii) | | Synonym |
Phacelia hispida subvar. cicutaria (Under Phacelia cicutaria var. cicutaria) | | Synonym |
Phacelia hispida var. brachyantha (Under Phacelia cryptantha) | | Synonym |
Phacelia hispida var. cicutaria (Under Phacelia cicutaria var. cicutaria) | | Synonym |
Phacelia hispida var. eximia (Under Phacelia cicutaria var. hispida) | | Synonym |
Phacelia hispida var. hubbyi (Under Phacelia hubbyi) | | Synonym |
Phacelia hispida var. umbrosa (Under Phacelia umbrosa) | | Synonym |
Phacelia hubbyi | | Native |
Phacelia humilis | | Native |
Phacelia humilis var. congdonii (Under Phacelia congdonii) | | Synonym |
Phacelia humilis var. dudleyi | | Native |
Phacelia humilis var. humilis | | Native |
Phacelia humilis var. lobata (Under Phacelia austromontana) | | Synonym |
Phacelia hydrophylloides | | Native |
Phacelia imbricata | | Native |
Phacelia imbricata subsp. bernardina (Under Phacelia imbricata var. bernardina) | | Synonym |
Phacelia imbricata subsp. imbricata (Under Phacelia imbricata var. bernardina) | | Synonym, in part |
Phacelia imbricata subsp. imbricata (Under Phacelia imbricata var. imbricata) | | Synonym, in part |
Phacelia imbricata subsp. patula (Under Phacelia imbricata var. patula) | | Synonym |
Phacelia imbricata var. bernardina | | Native |
Phacelia imbricata var. caudata (Under Phacelia imbricata var. imbricata) | | Synonym |
Phacelia imbricata var. imbricata | | Native |
Phacelia imbricata var. patula | | Native |
Phacelia insularis | | Native |
Phacelia insularis var. continentis | NORTH COAST PHACELIA | Native |
Phacelia insularis var. insularis | NORTHERN CHANNEL ISLANDS PHACELIA | Native |
Phacelia inundata | PLAYA PHACELIA | Native |
Phacelia inyoensis | INYO PHACELIA | Native |
Phacelia ivesiana | | Native |
Phacelia ivesiana var. glandulifera (Under Phacelia glandulifera) | | Synonym |
Phacelia keckii | SANTIAGO PEAK PHACELIA | Native |
Phacelia lemmonii | | Native |
Phacelia leonis | SISKIYOU PHACELIA | Native |
Phacelia leptostachya (Under Phacelia distans) | | Synonym |
Phacelia leucantha (Under Phacelia brachyloba) | | Synonym |
Phacelia leucophylla (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia leucophylla var. alpina (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia leucophylla var. compacta (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia leucophylla var. suksdorfii (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia linearis | | Native |
Phacelia loasifolia (Under Phacelia malvifolia var. loasifolia) | | Synonym |
Phacelia lobata (Under Phacelia austromontana) | | Synonym |
Phacelia longipes | | Native |
Phacelia lutea var. glandulifera (Under Phacelia adenophora) | | Synonym |
Phacelia luteopurpurea (Under Phacelia glandulifera) | | Synonym |
Phacelia lyonii | | Native |
Phacelia magellanica f. compacta (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia magellanica f. egena (Under Phacelia egena) | | Synonym |
Phacelia magellanica f. patula (Under Phacelia imbricata var. patula) | | Synonym |
Phacelia magellanica var. californica (Under Phacelia californica) | | Synonym |
Phacelia magellanica var. corymbosa (Under Phacelia corymbosa) | | Synonym |
Phacelia magellanica var. frigida (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia magellanica var. griseophylla (Under Phacelia mutabilis) | | Synonym |
Phacelia magellanica var. integrifolia (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia magellanica var. jacintensis (Under Phacelia mutabilis) | | Synonym |
Phacelia magellanica var. patula (Under Phacelia imbricata var. patula) | | Synonym |
Phacelia malvifolia | | Native |
Phacelia malvifolia (Under Phacelia malvifolia var. loasifolia) | | Synonym, in part |
Phacelia malvifolia (Under Phacelia malvifolia var. malvifolia) | | Synonym, in part |
Phacelia malvifolia subsp. loasifolia (Under Phacelia malvifolia var. loasifolia) | | Synonym |
Phacelia malvifolia var. loasifolia | | Native |
Phacelia malvifolia var. malvifolia | | Native |
Phacelia marcescens | | Native |
Phacelia menziesii (Under Phacelia linearis) | | Synonym |
Phacelia micrantha (Under Eucrypta micrantha) | | Synonym |
Phacelia micrantha var. bipinnatifida (Under Eucrypta chrysanthemifolia var. bipinnatifida) | | Synonym |
Phacelia minima (Under Phacelia eisenii) | | Synonym |
Phacelia minor | WILD CANTERBURY BELLS | Native |
Phacelia minor var. campanularia (Under Phacelia campanularia var. campanularia) | | Synonym |
Phacelia minor var. whitlavia (Under Phacelia minor) | | Synonym |
Phacelia minutiflora (Under Phacelia crenulata var. minutiflora) | | Synonym |
Phacelia mohavensis | MOJAVE PHACELIA | Native |
Phacelia mohavensis var. exilis (Under Phacelia exilis) | | Synonym |
Phacelia monoensis | MONO COUNTY PHACELIA | Native |
Phacelia monosperma (Under Phacelia heterophylla var. virgata) | | Synonym |
Phacelia mustelina | DEATH VALLEY ROUND-LEAVED PHACELIA | Native |
Phacelia mutabilis | | Native |
Phacelia mutabilis var. frigida (Under Phacelia hastata var. compacta) | | Synonym |
Phacelia namatoides (Under Phacelia racemosa) | | Synonym |
Phacelia nashiana | CHARLOTTE'S PHACELIA | Native |
Phacelia neglecta | | Native |
Phacelia nemophiloides (Under Phacelia davidsonii) | | Synonym |
Phacelia nemoralis | | Native |
Phacelia nemoralis subsp. nemoralis (Under Phacelia nemoralis var. nemoralis) | | Synonym |
Phacelia nemoralis subsp. oregonensis (Under Phacelia nemoralis var. oregonensis) | | Synonym |
Phacelia nemoralis var. mutabilis (Under Phacelia mutabilis) | | Synonym |
Phacelia nemoralis var. nemoralis | | Native |
Phacelia nemoralis var. oregonensis | | Native |
Phacelia nemoralis var. pseudohispida (Under Phacelia mutabilis) | | Synonym |
Phacelia nervosa (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia novenmillensis | NINE MILE CANYON PHACELIA | Native |
Phacelia orcuttiana (Under Phacelia brachyloba) | | Synonym |
Phacelia oreopola (Under Phacelia imbricata var. patula) | | Synonym |
Phacelia oreopola subsp. oreopola (Under Phacelia imbricata var. patula) | | Synonym |
Phacelia oreopola subsp. simulans (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia orogenes | MOUNTAIN PHACELIA | Native |
Phacelia pachyphylla | | Native |
Phacelia palmeri (Under Phacelia stellaris) | | Synonym |
Phacelia parishii | PARISH'S PHACELIA | Native |
Phacelia parryi | | Native |
Phacelia pedicellata | | Native |
Phacelia peirsoniana | PEIRSON'S PHACELIA | Native |
Phacelia perityloides | | Native |
Phacelia perityloides var. jaegeri | JAEGER'S PHACELIA | Native |
Phacelia perityloides var. perityloides | | Native |
Phacelia phacelioides | MOUNT DIABLO PHACELIA | Native |
Phacelia phyllomanica var. interrupta (Under Phacelia floribunda) | | Synonym |
Phacelia piersoniae (Under Phacelia heterophylla var. virgata) | | Synonym |
Phacelia pinetorum (Under Eucrypta micrantha) | | Synonym |
Phacelia pinnata var. pseudohispida (Under Phacelia mutabilis) | | Synonym |
Phacelia platyloba | | Native |
Phacelia polysperma (Under Phacelia lemmonii) | | Synonym |
Phacelia pratensis (Under Phacelia davidsonii) | | Synonym |
Phacelia pringlei | | Native |
Phacelia pringlei var. orogenes (Under Phacelia orogenes) | | Synonym |
Phacelia procera | | Native |
Phacelia pulchella var. gooddingii | GOODDING'S PHACELIA | Native |
Phacelia purpusii | | Native |
Phacelia quickii | | Native |
Phacelia racemosa | | Native |
Phacelia ramosissima | | Native |
Phacelia ramosissima var. austrolitoralis (Under Phacelia ramosissima) | | Synonym |
Phacelia ramosissima var. eremophila (Under Phacelia ramosissima) | | Synonym |
Phacelia ramosissima var. hispida (Under Phacelia cicutaria var. hispida) | | Synonym |
Phacelia ramosissima var. latifolia (Under Phacelia ramosissima) | | Synonym |
Phacelia ramosissima var. montereyensis (Under Phacelia ramosissima) | | Synonym |
Phacelia ramosissima var. subglabra (Under Phacelia ramosissima) | | Synonym |
Phacelia ramosissima var. suffrutescens (Under Phacelia ramosissima) | | Synonym |
Phacelia ramosissima var. valida (Under Phacelia ramosissima) | | Synonym |
Phacelia rattanii | | Native |
Phacelia rotundifolia | | Native |
Phacelia rugulosa (Under Phacelia affinis) | | Synonym |
Phacelia salina (Under Phacelia parishii) | | Synonym |
Phacelia saxicola | | Native |
Phacelia scabrella (Under Phacelia distans) | | Synonym |
Phacelia sericea subsp. ciliosa (Under Phacelia sericea var. ciliosa) | | Synonym |
Phacelia sericea var. biennis (Under Phacelia hastata var. hastata) | | Synonym |
Phacelia sericea var. ciliosa | BLUE ALPINE PHACELIA | Native |
Phacelia sericea var. nelsonii (Under Phacelia sericea var. ciliosa) | | Synonym |
Phacelia stebbinsii | STEBBINS' PHACELIA | Native |
Phacelia stellaris | BRAND'S STAR PHACELIA | Native |
Phacelia suaveolens | | Native |
Phacelia suaveolens subsp. keckii (Under Phacelia keckii) | | Synonym |
Phacelia suaveolens var. keckii (Under Phacelia keckii) | | Synonym |
Phacelia tanacetifolia | | Native |
Phacelia tanacetifolia var. cinerea (Under Phacelia tanacetifolia) | | Synonym |
Phacelia tanacetifolia var. hubbyi (Under Phacelia hubbyi) | | Synonym |
Phacelia tanacetifolia var. pseudo-distans (Under Phacelia tanacetifolia) | | Synonym |
Phacelia tanacetifolia var. tenuifolia (Under Phacelia distans) | | Synonym |
Phacelia tenuifolia (Under Phacelia distans) | | Synonym |
Phacelia tetramera | | Native |
Phacelia thermalis | | Native |
Phacelia umbrosa | | Native |
Phacelia vallicola | MARIPOSA PHACELIA | Native |
Phacelia vallis-mortae | | Native |
Phacelia virgata (Under Phacelia heterophylla var. virgata) | | Synonym |
Phacelia virgata var. ampliata (Under Phacelia heterophylla var. virgata) | | Synonym |
Phacelia virgata var. bernardina (Under Phacelia imbricata var. bernardina) | | Synonym |
Phacelia viscida | | Native |
Phacelia viscida var. albiflora | | Native |
Phacelia viscida var. viscida | | Native |
Phacelia whitlavia (Under Phacelia minor) | | Synonym |
Phacelia whitlavia var. jonesii (Under Phacelia minor) | | Synonym |
Phalacroseris | | |
Phalacroseris bolanderi | BOLANDER'S MOCK DANDELION | Native |
Phalacroseris bolanderi var. coronata (Under Phalacroseris bolanderi) | | Synonym |
Phalaris ↳ Key to Phalaris | CANARY GRASS | |
Phalaris americana (Under Phalaris caroliniana) | | Synonym |
Phalaris amethystina (Under Phalaris californica) | | Unabridged misapplied name |
Phalaris angusta | TIMOTHY CANARY GRASS | Native |
Phalaris aquatica | HARDING GRASS | Naturalized |
Phalaris arundinacea | REED CANARY GRASS | Native |
Phalaris brachystachys | SHORT-SPIKED CANARY GRASS | Naturalized |
Phalaris bulbosa (Under Phalaris aquatica) | | Unabridged misapplied name |
Phalaris bulbosa (Under Phalaris coerulescens) | | Illegitimate name |
Phalaris californica | CALIFORNIA CANARY GRASS | Native |
Phalaris canariensis | CANARY GRASS | Naturalized |
Phalaris caroliniana | CAROLINA CANARY GRASS | Naturalized |
Phalaris coerulescens | SUNOL GRASS | Naturalized |
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 lemmonii | LEMMON'S CANARY GRASS | Native |
Phalaris microstachya (Under Phalaris caroliniana) | | Synonym |
Phalaris minor | LITTLE-SEEDED CANARY GRASS | Naturalized |
Phalaris occidentalis (Under Phalaris caroliniana) | | Synonym |
Phalaris paradoxa | HOOD CANARY GRASS | Naturalized |
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 |
Phaseolus | WILD BEAN | |
Phaseolus carterae (Under Phaseolus filiformis) | | Synonym |
Phaseolus filiformis | SLENDER-STEM BEAN | Native |
Phaseolus sanctorum (Under Phaseolus filiformis) | | Synonym |
Phaseolus wrightii (Under Phaseolus filiformis) | | Synonym |
Phelipanche | BROOMRAPE | |
Phelipanche ramosa | | Naturalized |
Philadelphus ↳ Key to Philadelphus | MOCK ORANGE | |
Philadelphus californicus (Under Philadelphus lewisii) | | Synonym |
Philadelphus lewisii | WILD MOCK ORANGE | Native |
Philadelphus lewisii subsp. californicus (Under Philadelphus lewisii) | | Synonym |
Philadelphus lewisii subsp. gordonianus (Under Philadelphus lewisii) | | Synonym |
Philadelphus microphyllus | LITTLELEAF MOCK ORANGE | Native |
Philadelphus microphyllus subsp. pumilus (Under Philadelphus microphyllus) | | Synonym |
Philadelphus microphyllus subsp. stramineus (Under Philadelphus microphyllus) | | Synonym |
Philadelphus microphyllus var. pumilus (Under Philadelphus microphyllus) | | Synonym |
Philadelphus microphyllus var. stramineus (Under Philadelphus microphyllus) | | Synonym |
Philadelphus pumilus (Under Philadelphus microphyllus) | | Synonym |
Philadelphus stramineus (Under Philadelphus microphyllus) | | Synonym |
Philibertella hartwegii (Under Funastrum cynanchoides var. hartwegii) | | Synonym |
Philibertia heterophylla (Under Funastrum cynanchoides var. hartwegii) | | Synonym |
Philibertia hirtella (Under Funastrum hirtellum) | | Synonym |
Philibertia linearis var. hirtella (Under Funastrum hirtellum) | | Synonym |
Phleum ↳ Key to Phleum | TIMOTHY | |
Phleum alpinum | ALPINE TIMOTHY, MOUNTAIN TIMOTHY | Native |
Phleum pratense | CULTIVATED TIMOTHY | Naturalized |
Phlox ↳ Key to Phlox | | |
Phlox adsurgens | | Native |
Phlox austromontana | | Native |
Phlox austromontana subsp. austromontana (Under Phlox austromontana) | | Synonym |
Phlox austromontana subsp. prostrata (Under Phlox austromontana) | | Synonym |
Phlox azurea (Under Phlox diffusa) | | Synonym |
Phlox bryoides (Under Phlox muscoides) | | Synonym |
Phlox caespitosa subsp. pulvinata (Under Phlox pulvinata) | | Synonym |
Phlox caespitosa var. condensata (Under Phlox condensata) | | Synonym |
Phlox condensata | | Native |
Phlox covillei (Under Phlox condensata) | | Synonym |
Phlox diffusa | | Native |
Phlox dispersa | HIGH SIERRA PHLOX | Native |
Phlox dolichantha | BIG BEAR VALLEY PHLOX | Native |
Phlox douglasii | | Native |
Phlox douglasii subsp. rigida (Under Phlox douglasii) | | Synonym |
Phlox gracilis (Under Microsteris gracilis) | | Synonym |
Phlox hirsuta | YREKA PHLOX | Native |
Phlox hoodii subsp. canescens | | Native |
Phlox hoodii subsp. lanata (Under Phlox hoodii subsp. canescens) | | Synonym |
Phlox muscoides | SQUARESTEM PHLOX | Native |
Phlox pulvinata | | Native |
Phlox rigida (Under Phlox douglasii) | | Synonym |
Phlox speciosa | | Native |
Phlox speciosa subsp. nitida (Under Phlox speciosa) | | Synonym |
Phlox speciosa subsp. occidentalis (Under Phlox speciosa) | | Synonym |
Phlox stansburyi | | Native |
Phlox stansburyi subsp. stansburyi | | Native |
Phlox stansburyi subsp. superba | | Native |
Phlox stansburyi var. brevifolia | | Native |
Phoenicaulis | | |
Phoenicaulis cheiranthoides | | Native |
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 canariensis | CANARY ISLAND PALM | Naturalized |
Phoenix dactylifera | DATE PALM | Waif |
Pholisma ↳ Key to Pholisma | | |
Pholisma arenarium | | Native |
Pholisma sonorae | SAND FOOD | Native |
Pholistoma ↳ Key to Pholistoma | | |
Pholistoma auritum | | Native |
Pholistoma auritum var. arizonicum | ARIZONA PHOLISTOMA | Native |
Pholistoma auritum var. auritum | FIESTA FLOWER | Native |
Pholistoma membranaceum | | Native |
Pholistoma racemosum | | Native |
Phoradendron ↳ Key to Phoradendron | MISTLETOE | |
Phoradendron bolleanum | | Native |
Phoradendron bolleanum subsp. densum (Under Phoradendron bolleanum) | | Synonym |
Phoradendron bolleanum subsp. pauciflorum (Under Phoradendron bolleanum) | | Synonym |
Phoradendron bolleanum var. densum (Under Phoradendron bolleanum) | | Synonym |
Phoradendron bolleanum var. pauciflorum (Under Phoradendron bolleanum) | | Synonym |
Phoradendron californicum | DESERT MISTLETOE | Native |
Phoradendron californicum var. distans (Under Phoradendron californicum) | | Synonym |
Phoradendron californicum var. leucocarpum (Under Phoradendron californicum) | | Synonym |
Phoradendron densum (Under Phoradendron bolleanum) | | Synonym |
Phoradendron juniperinum | JUNIPER or INCENSE CEDAR MISTLETOE | Native |
Phoradendron juniperinum var. ligatum (Under Phoradendron juniperinum) | | Synonym |
Phoradendron leucarpum | AMERICAN MISTLETOE | Native |
Phoradendron leucarpum subsp. macrophyllum | | Native |
Phoradendron leucarpum subsp. tomentosum | | Native |
Phoradendron libocedri (Under Phoradendron juniperinum) | | Synonym |
Phoradendron macrophyllum (Under Phoradendron leucarpum subsp. macrophyllum) | | Synonym |
Phoradendron pauciflorum (Under Phoradendron bolleanum) | | Synonym |
Phoradendron serotinum (Under Phoradendron leucarpum) | | Synonym |
Phoradendron serotinum subsp. macrophyllum (Under Phoradendron leucarpum subsp. macrophyllum) | | Synonym |
Phoradendron serotinum subsp. tomentosum (Under Phoradendron leucarpum subsp. tomentosum) | | Synonym |
Phoradendron villosum (Under Phoradendron leucarpum subsp. tomentosum) | | Synonym |
Phragmites | COMMON REED, CARRIZO | |
Phragmites australis | COMMON REED | Native |
Phragmites australis var. berlandieri (Under Phragmites australis) | | Synonym |
Phragmites berlandieri (Under Phragmites australis) | | Synonym |
Phragmites communis (Under Phragmites australis) | | Synonym |
Phragmites communis var. berlandieri (Under Phragmites australis) | | Synonym |
Phrymaceae ↳ Key to Phrymaceae | LOPSEED FAMILY | |
Phyla ↳ Key to Phyla | | |
Phyla lanceolata | | Native |
Phyla nodiflora | | Native |
Phyla nodiflora var. canescens (Under Phyla nodiflora) | | Synonym |
Phyla nodiflora var. incisa (Under Phyla nodiflora) | | Synonym |
Phyla nodiflora var. reptans (Under Phyla nodiflora) | | Synonym |
Phyla nodiflora var. rosea (Under Phyla nodiflora) | | Synonym |
Phyllodoce ↳ Key to Phyllodoce | MOUNTAIN HEATHER | |
Phyllodoce breweri | | Native |
Phyllodoce empetriformis | | Native |
Phyllogonum luteolum (Under Gilmania luteola) | | Synonym |
Phyllospadix ↳ Key to Phyllospadix | SURF-GRASS | |
Phyllospadix scouleri | | Native |
Phyllospadix torreyi | | Native |
Phyllostachys | | |
Phyllostachys aurea | FISHPOLE BAMBOO, GOLDEN BAMBOO | Agricultural, garden, or urban weed |
Physalis ↳ Key to Physalis | GROUND-CHERRY | |
Physalis acutifolia | | Native |
Physalis angulata var. lanceifolia (Under Physalis lanceifolia) | | Synonym |
Physalis crassifolia | | Native |
Physalis crassifolia var. versicolor (Under Physalis crassifolia) | | Synonym |
Physalis fendleri (Under Physalis hederifolia var. fendleri) | | Synonym |
Physalis greenei (Under Physalis crassifolia) | | Synonym |
Physalis hederifolia | | Native |
Physalis hederifolia var. cordifolia (Under Physalis hederifolia var. fendleri) | | Synonym |
Physalis hederifolia var. fendleri | | Native |
Physalis hederifolia var. palmeri | | Native |
Physalis ixocarpa (Under Physalis philadelphica) | | Synonym |
Physalis lanceifolia | | Naturalized |
Physalis lancifolia (Under Physalis lanceifolia) | | Orthographic variant |
Physalis lobata | LOBED GROUND-CHERRY | Native |
Physalis longifolia | | Waif |
Physalis mollis (Under Physalis viscosa) | | Synonym |
Physalis philadelphica | TOMATILLO | Naturalized |
Physalis pruinosa (Under Physalis pubescens var. grisea) | | Synonym |
Physalis pubescens | | Naturalized |
Physalis pubescens var. grisea | | Naturalized |
Physalis pubescens var. integrifolia | | Naturalized |
Physalis viscosa | GRAPE GROUND-CHERRY | Waif |
Physalis viscosa var. cinerascens (Under Physalis viscosa) | | Synonym |
Physaria ↳ Key to Physaria | BLADDERPOD | |
Physaria chambersii | CHAMBERS' PHYSARIA | Native |
Physaria cordiformis | | Native |
Physaria kingii | | Native |
Physaria kingii subsp. bernardina | SAN BERNARDINO MOUNTAINS BLADDERPOD | Native |
Physaria kingii subsp. kingii | | Native |
Physaria kingii subsp. latifolia | | Native |
Physaria ludoviciana | SILVER BLADDERPOD | Native |
Physaria occidentalis subsp. occidentalis | | Native |
Physaria tenella | | Native |
Physaria wardii (Under Physaria kingii subsp. latifolia) | | Synonym |
Physocarpus ↳ Key to Physocarpus | NINEBARK | |
Physocarpus alternans | NEVADA NINEBARK | Native |
Physocarpus alternans subsp. annulatus (Under Physocarpus alternans) | | Synonym |
Physocarpus alternans subsp. panamintensis (Under Physocarpus alternans) | | Synonym |
Physocarpus capitatus | | Native |
Phytolacca ↳ Key to Phytolacca | | |
Phytolacca americana var. americana | POKEWEED | Naturalized |
Phytolacca heterotepala | MEXICAN POKEWEED | Waif |
Phytolacca icosandra | TROPICAL POKEWEED | Naturalized |
Phytolaccaceae | POKEWEED FAMILY | |
Picea ↳ Key to Picea | SPRUCE | |
Picea breweriana | BREWER SPRUCE | Native |
Picea engelmannii | ENGELMANN SPRUCE | Native |
Picea sitchensis | SITKA SPRUCE | Native |
Pickeringia | CHAPARRAL PEA | |
Pickeringia montana ↳ Key to Pickeringia montana | CHAPARRAL PEA | Native |
Pickeringia montana var. montana | | Native |
Pickeringia montana var. tomentosa | WOOLLY CHAPARRAL PEA | Native |
Picradeniopsis | | |
Picradeniopsis multiflora | | Native |
Picris echioides (Under Helminthotheca echioides) | | Synonym |
Picrodendraceae | BITTER-TREE FAMILY | |
Picrothamnus desertorum (Under Artemisia spinescens) | | Synonym |
Pilostyles | | |
Pilostyles thurberi | THURBER'S PILOSTYLES | Native |
Pilularia | | |
Pilularia americana | | Native |
Pinaceae ↳ Key to Pinaceae | PINE FAMILY | |
Pinguicula | BUTTERWORT | |
Pinguicula macroceras | HORNED BUTTERWORT | Native |
Pinguicula macroceras subsp. macroceras (Under Pinguicula macroceras) | | Synonym |
Pinguicula macroceras subsp. nortensis (Under Pinguicula macroceras) | | Synonym |
Pinguicula vulgaris subsp. macroceras (Under Pinguicula macroceras) | | Synonym |
Pinus ↳ Key to Pinus | PINE | |
Pinus albicaulis | WHITEBARK PINE | Native |
Pinus aristata (Under Pinus longaeva) | | Synonym, in part |
Pinus attenuata | KNOBCONE PINE | Native |
Pinus balfouriana | FOXTAIL PINE | Native |
Pinus balfouriana subsp. austrina | | Native |
Pinus balfouriana subsp. balfouriana | | Native |
Pinus benthamiana (Under Pinus ponderosa var. pacifica) | | Synonym |
Pinus californiarum (Under Pinus monophylla) | | Synonym |
Pinus contorta | | Native |
Pinus contorta subsp. bolanderi | BOLANDER'S BEACH PINE | Native |
Pinus contorta subsp. contorta | SHORE PINE | Native |
Pinus contorta subsp. murrayana | LODGEPOLE PINE | Native |
Pinus coulteri | COULTER PINE | Native |
Pinus edulis | COLORADO PINYON | Native |
Pinus flexilis | LIMBER PINE | Native |
Pinus jeffreyi | JEFFREY PINE | Native |
Pinus lambertiana | SUGAR PINE | Native |
Pinus longaeva | BRISTLECONE PINE | Native |
Pinus monophylla | SINGLELEAF PINYON PINE | Native |
Pinus monticola | WESTERN WHITE PINE | Native |
Pinus muricata | BISHOP PINE | Native |
Pinus murrayana (Under Pinus contorta subsp. murrayana) | | Synonym |
Pinus ponderosa | PONDEROSA PINE, WESTERN YELLOW PINE | Native |
Pinus ponderosa subsp. benthamiana (Under Pinus ponderosa var. pacifica) | | Synonym |
Pinus ponderosa var. benthamiana (Under Pinus ponderosa var. pacifica) | | Synonym |
Pinus ponderosa var. pacifica | PACIFIC PONDEROSA PINE | Native |
Pinus ponderosa var. ponderosa | NORTH PLATEAU PONDEROSA PINE | Native |
Pinus ponderosa var. washoensis | WASHOE PINE | Native |
Pinus quadrifolia | PARRY PINYON PINE | Native |
Pinus radiata | MONTEREY PINE | Native |
Pinus remorata (Under Pinus muricata) | | Synonym |
Pinus sabiniana | GRAY, GHOST, or FOOTHILL PINE | Native |
Pinus torreyana | | Native |
Pinus torreyana subsp. insularis | SANTA ROSA ISLAND TORREY PINE | Native |
Pinus torreyana subsp. torreyana | TORREY PINE | Native |
Pinus washoensis (Under Pinus ponderosa var. washoensis) | | Synonym |
Piperia ↳ Key to Piperia | PIPERIA | |
Piperia candida | WHITE-FLOWERED REIN-ORCHID | Native |
Piperia colemanii | COLEMAN'S REIN-ORCHID | Native |
Piperia cooperi | CHAPARRAL REIN-ORCHID | Native |
Piperia elegans | | Native |
Piperia elegans subsp. decurtata | POINT REYES REIN-ORCHID | Native |
Piperia elegans subsp. elegans | COAST PIPERIA, ELEGANT PIPERIA | Native |
Piperia elongata | CHAPARRAL ORCHID, WOOD REIN-ORCHID | Native |
Piperia leptopetala | NARROW-PETALED REIN-ORCHID | Native |
Piperia michaelii | MICHAEL'S REIN-ORCHID | Native |
Piperia transversa | FLAT SPURRED PIPERIA | Native |
Piperia unalascensis | ALASKA PIPERIA, SLENDER-SPIRE ORCHID | Native |
Piperia yadonii | YADON'S REIN-ORCHID | Native |
Piptatherum exiguum (Under Stipa exigua) | | Synonym |
Piptatherum micranthum (Under Stipa divaricata) | | Synonym |
Piptatherum miliaceum (Under Stipa miliacea var. miliacea) | | Synonym |
Piptatherum miliaceum subsp. miliaceum (Under Stipa miliacea var. miliacea) | | Synonym |
Piptochaetium setosum (Under Stipa purpurata) | | Synonym |
Piptochaetium stipoides (Under Stipa chaetophora) | | Synonym |
Pistacia | PISTACHIO | |
Pistacia atlantica | | Naturalized |
Pistia | WATER-LETTUCE | |
Pistia stratiotes | | Waif |
Pisum | PEA | |
Pisum sativum | COMMON PEA | Naturalized |
Pisum sativum var. arvense (Under Pisum sativum) | | Synonym |
Pithecellobium minutum (Under Vachellia farnesiana var. minuta) | | Synonym |
Pittosporaceae ↳ Key to Pittosporaceae | PITTOSPORUM FAMILY | |
Pittosporum ↳ Key to Pittosporum | | |
Pittosporum crassifolium | | Naturalized |
Pittosporum tenuifolium | | Waif |
Pittosporum tobira | JAPANESE PITTOSPORUM, MOCK ORANGE | Naturalized |
Pittosporum undulatum | VICTORIAN BOX, MOCK ORANGE | Naturalized |
Pityopus | | |
Pityopus californicus | CALIFORNIA PINEFOOT | Native |
Pityrogramma triangularis var. maxonii (Under Pentagramma maxonii) | | Synonym |
Pityrogramma triangularis var. pallida (Under Pentagramma pallida) | | Synonym |
Pityrogramma triangularis var. triangularis (Under Pentagramma triangularis) | | Synonym |
Pityrogramma triangularis var. viscosa (Under Pentagramma viscosa) | | Synonym |
Plagiobothrys ↳ Key to Plagiobothrys | POPCORNFLOWER | |
Plagiobothrys acanthocarpus | ADOBE POPCORNFLOWER | Native |
Plagiobothrys arizonicus | ARIZONA POPCORNFLOWER | Native |
Plagiobothrys austinae (Under Plagiobothrys austiniae) | | Orthographic variant |
Plagiobothrys austiniae | AUSTIN'S SPINY-NUT POPCORNFLOWER | Native |
Plagiobothrys bracteatus | BRACTED POPCORNFLOWER | Native |
Plagiobothrys bracteatus var. aculeolatus (Under Plagiobothrys bracteatus) | | Synonym |
Plagiobothrys californicus (Under Plagiobothrys collinus var. californicus) | | Synonym |
Plagiobothrys californicus var. fulvescens (Under Plagiobothrys collinus var. fulvescens) | | Synonym |
Plagiobothrys californicus var. gracilis (Under Plagiobothrys collinus var. gracilis) | | Synonym |
Plagiobothrys californicus var. ursinus (Under Plagiobothrys collinus var. ursinus) | | Synonym |
Plagiobothrys canescens | | Native |
Plagiobothrys canescens var. canescens | VALLEY POPCORNFLOWER | Native |
Plagiobothrys canescens var. catalinensis | SANTA CATALINA POPCORNFLOWER | Native |
Plagiobothrys chorisianus | ARTIST'S POPCORNFLOWER | Native |
Plagiobothrys chorisianus var. chorisianus | CHORIS' POPCORNFLOWER | Native |
Plagiobothrys chorisianus var. hickmanii | HICKMAN'S POPCORNFLOWER | Native |
Plagiobothrys cognatus | COGNATE POPCORNFLOWER | Native |
Plagiobothrys collinus | | Native |
Plagiobothrys collinus var. californicus | CALIFORNIA POPCORNFLOWER | Native |
Plagiobothrys collinus var. fulvescens | ROUGH-STEMMED POPCORNFLOWER | Native |
Plagiobothrys collinus var. gracilis | SAN DIEGO POPCORNFLOWER | Native |
Plagiobothrys collinus var. ursinus | BEAR VALLEY POPCORNFLOWER | Native |
Plagiobothrys cusickii | CUSICK'S POPCORNFLOWER | Native |
Plagiobothrys diffusus | SAN FRANCISCO POPCORNFLOWER | Native |
Plagiobothrys distantiflorus | MADERA POPCORNFLOWER | Native |
Plagiobothrys foliaceus (Under Sonnea hispida) | | Synonym |
Plagiobothrys fulvus var. campestris | FIELD POPCORNFLOWER | Native |
Plagiobothrys glaber | HAIRLESS POPCORNFLOWER | Native |
Plagiobothrys glyptocarpus | SCULPTURED-NUT POPCORNFLOWER | Native |
Plagiobothrys glyptocarpus var. glyptocarpus | | Native |
Plagiobothrys glyptocarpus var. modestus | CEDAR RIDGE POPCORNFLOWER | Native |
Plagiobothrys greenei | GREENE'S SPINY-NUT POPCORNFLOWER | Native |
Plagiobothrys hispidulus | HARSH POPCORNFLOWER | Native |
Plagiobothrys hispidus (Under Sonnea hispida) | | Synonym |
Plagiobothrys humistratus | LOW POPCORNFLOWER | Native |
Plagiobothrys hystriculus | BEARDED POPCORNFLOWER | Native |
Plagiobothrys infectivus | DYE POPCORNFLOWER | Native |
Plagiobothrys jonesii (Under Simpsonanthus jonesii) | | Synonym |
Plagiobothrys kingii (Under Amsinckiopsis kingii) | | Synonym |
Plagiobothrys kingii var. harknessii (Under Amsinckiopsis kingii var. harknessii) | | Synonym |
Plagiobothrys kingii var. kingii (Under Amsinckiopsis kingii var. kingii) | | Synonym |
Plagiobothrys leptocladus | ALKALI PLAGIOBOTHRYS | Native |
Plagiobothrys lithocaryus | MAYACAMAS POPCORNFLOWER | Native |
Plagiobothrys mollis | CREEPING POPCORNFLOWER, SOFT POPCORNFLOWER | Native |
Plagiobothrys mollis var. mollis | | Native |
Plagiobothrys mollis var. vestitus | PETALUMA POPCORNFLOWER | Native |
Plagiobothrys myosotoides (Under Plagiobothrys verrucosus) | | Misapplied name |
Plagiobothrys myosotoides subsp. verrucosus (Under Plagiobothrys verrucosus) | | Synonym ined. |
Plagiobothrys nitens | SHINY-NUTLET POPCORNFLOWER | Native |
Plagiobothrys nothofulvus | RUSTY POPCORNFLOWER, FOOTHILL SNOWDROPS | Native |
Plagiobothrys parishii | PARISH'S POPCORNFLOWER | Native |
Plagiobothrys reticulatus | TRACY'S POPCORNFLOWER | Native |
Plagiobothrys reticulatus var. reticulatus | | Native |
Plagiobothrys reticulatus var. rossianorum | FORT ROSS POPCORNFLOWER | Native |
Plagiobothrys salsus | DESERT POPCORNFLOWER | Native |
Plagiobothrys scouleri var. cusickii (Under Plagiobothrys cusickii) | | Synonym |
Plagiobothrys scouleri var. hispidulus (Under Plagiobothrys hispidulus) | | Synonym |
Plagiobothrys scouleri var. penicillatus (Under Plagiobothrys cognatus) | | Synonym, in part |
Plagiobothrys scouleri var. penicillatus (Under Plagiobothrys cusickii) | | Synonym, in part |
Plagiobothrys scouleri var. penicillatus (Under Plagiobothrys hispidulus) | | Synonym, in part |
Plagiobothrys scouleri var. penicillatus (Under Plagiobothrys nitens) | | Synonym, in part |
Plagiobothrys scouleri var. penicillatus (Under Plagiobothrys reticulatus var. rossianorum) | | Synonym, in part |
Plagiobothrys scriptus | SCRIDGEE'S POPCORNFLOWER | Native |
Plagiobothrys shastensis | SHASTA POPCORNFLOWER | Native |
Plagiobothrys stipitatus | GREAT VALLEY POPCORNFLOWER | Native |
Plagiobothrys stipitatus var. micranthus | | Native |
Plagiobothrys stipitatus var. stipitatus | SHOWY GREAT VALLEY POPCORNFLOWER | Native |
Plagiobothrys strictus | CALISTOGA POPCORNFLOWER | Native |
Plagiobothrys tenellus | PACIFIC POPCORNFLOWER | Native |
Plagiobothrys tener | SLENDER POPCORNFLOWER | Native |
Plagiobothrys tener var. subglaber | SERPENTINE POPCORNFLOWER | Native |
Plagiobothrys tener var. tener | | Native |
Plagiobothrys torreyi | HIGH SIERRA POPCORNFLOWER | Native |
Plagiobothrys torreyi var. diffusus | | Native |
Plagiobothrys torreyi var. perplexans | CHAPARRAL POPCORNFLOWER | Native |
Plagiobothrys torreyi var. torreyi | YOSEMITE POPCORNFLOWER | Native |
Plagiobothrys trachycarpus | ROUGH-NUTLET POPCORNFLOWER | Native |
Plagiobothrys uncinatus | HOOKED POPCORNFLOWER | Native |
Plagiobothrys undulatus | WAVY-STEMMED POPCORNFLOWER | Native |
Plagiobothrys verrucosus | FORGET-ME-NOT POPCORNFLOWER | Native |
Planodes | | |
Planodes virginica | | Naturalized |
Plantaginaceae ↳ Key to Plantaginaceae | PLANTAIN FAMILY | |
Plantago ↳ Key to Plantago | PLANTAIN | |
Plantago arenaria | | Naturalized |
Plantago aristata | | Naturalized |
Plantago bigelovii (Under Plantago elongata) | | Synonym |
Plantago bigelovii subsp. bigelovii (Under Plantago elongata) | | Synonym |
Plantago bigelovii subsp. californica (Under Plantago elongata) | | Synonym |
Plantago bigelovii subsp. californica (Under Plantago erecta) | | Misapplied name |
Plantago coronopus | | Naturalized |
Plantago elongata | | Native |
Plantago elongata subsp. elongata (Under Plantago elongata) | | Synonym |
Plantago elongata subsp. pentasperma (Under Plantago elongata) | | Synonym |
Plantago erecta | | Native |
Plantago erecta subsp. rigidior (Under Plantago erecta) | | Synonym |
Plantago eriopoda | | Native |
Plantago fastigiata (Under Plantago ovata var. fastigiata) | | Synonym |
Plantago hirtella var. galeottiana (Under Plantago subnuda) | | Synonym |
Plantago hookeriana var. californica (Under Plantago erecta) | | Synonym |
Plantago indica (Under Plantago arenaria) | | Superfluous name |
Plantago insularis (Under Plantago ovata var. insularis) | | Synonym |
Plantago insularis var. fastigiata (Under Plantago ovata var. fastigiata) | | Synonym |
Plantago lanceolata | ENGLISH PLANTAIN | Naturalized |
Plantago major | COMMON PLANTAIN | Naturalized |
Plantago major var. pilgeri (Under Plantago major) | | Synonym |
Plantago major var. scopulorum (Under Plantago major) | | Synonym |
Plantago maritima | | Native |
Plantago maritima var. californica (Under Plantago maritima) | | Synonym |
Plantago maritima var. juncoides (Under Plantago maritima) | | Synonym |
Plantago maritima var. maritima (Under Plantago maritima) | | Synonym |
Plantago ovata | | Native |
Plantago ovata var. fastigiata | | Native |
Plantago ovata var. insularis | | Native |
Plantago patagonica | | Native |
Plantago psyllium (Under Plantago arenaria) | | Synonym |
Plantago purshii (Under Plantago patagonica) | | Synonym |
Plantago purshii var. oblonga (Under Plantago patagonica) | | Synonym |
Plantago purshii var. picta (Under Plantago patagonica) | | Synonym |
Plantago pusilla | | Naturalized |
Plantago rhodosperma | | Native |
Plantago subnuda | | Native |
Plantago truncata subsp. firma | | Naturalized |
Plantago virginica | | Naturalized |
Platanaceae | PLANE-TREE or SYCAMORE FAMILY | |
Platanthera ↳ Key to Platanthera | BOG-ORCHID | |
Platanthera dilatata var. leucostachys | WHITE-FLOWERED BOG-ORCHID | Native |
Platanthera foetida (Under Piperia unalascensis) | | Synonym |
Platanthera gracilis (Under Platanthera stricta) | | Synonym |
Platanthera hyperborea (Under Platanthera tescamnis) | | Misapplied name |
Platanthera hyperborea var. purpurascens (Under Platanthera yosemitensis) | | Unabridged misapplied name |
Platanthera leucostachys (Under Platanthera dilatata var. leucostachys) | | Synonym |
Platanthera purpurascens (Under Platanthera yosemitensis) | | Unabridged misapplied name |
Platanthera sparsiflora | SPARSE-FLOWERED BOG-ORCHID | Native |
Platanthera stricta | SLENDER BOG-ORCHID | Native |
Platanthera tescamnis | | Native |
Platanthera yosemitensis | YOSEMITE BOG-ORCHID | Native |
Platanus ↳ Key to Platanus | | |
Platanus ×acerifolia (Under Platanus ×hispanica) | | Synonym |
Platanus ×hispanica | LONDON PLANE TREE | Waif |
Platanus ×hybrida (Under Platanus ×hispanica) | | Synonym |
Platanus hispanica (Under Platanus ×hispanica) | | Synonym |
Platanus racemosa | WESTERN SYCAMORE | Native |
Platystemon | | |
Platystemon californicus | CREAM CUPS | Native |
Platystemon californicus var. ciliatus (Under Platystemon californicus) | | Synonym |
Platystemon californicus var. crinitus (Under Platystemon californicus) | | Synonym |
Platystemon californicus var. horridulus (Under Platystemon californicus) | | Synonym |
Platystemon californicus var. nutans (Under Platystemon californicus) | | Synonym |
Platystemon californicus var. ornithopus (Under Platystemon californicus) | | Synonym |
Platystemon californicus var. sphaerocarpus (Under Platystemon californicus) | | Synonym |
Platystemon crinitus (Under Platystemon californicus) | | Synonym |
Platystigma linearis (Under Hesperomecon linearis) | | Synonym |
Plecostachys | | |
Plecostachys serpyllifolia | PETITE-LICORICE | Naturalized |
Plectritis ↳ Key to Plectritis | | |
Plectritis brachystemon (Under Plectritis congesta subsp. brachystemon) | | Synonym |
Plectritis ciliosa | | Native |
Plectritis ciliosa subsp. ciliosa (Under Plectritis ciliosa) | | Synonym |
Plectritis ciliosa subsp. insignis (Under Plectritis ciliosa) | | Synonym |
Plectritis congesta | | Native |
Plectritis congesta subsp. brachystemon | | Native |
Plectritis congesta subsp. congesta | SEA BLUSH | Native |
Plectritis congesta subsp. nitida (Under Plectritis congesta subsp. brachystemon) | | Synonym |
Plectritis eichleriana (Under Plectritis macrocera) | | Synonym |
Plectritis jepsonii (Under Plectritis macrocera) | | Synonym |
Plectritis macrocera | | Native |
Plectritis macrocera var. collina (Under Plectritis macrocera) | | Synonym |
Plectritis macrocera var. grayi (Under Plectritis macrocera) | | Synonym |
Plectritis macrocera var. mamillata (Under Plectritis macrocera) | | Synonym |
Plectritis magna var. nitida (Under Plectritis congesta subsp. brachystemon) | | Synonym |
Pleiacanthus | | |
Pleiacanthus spinosus | THORNY SKELETONWEED | Native |
Pleuraphis jamesii (Under Hilaria jamesii) | | Synonym |
Pleuraphis rigida (Under Hilaria rigida) | | Synonym |
Pleuricospora | | |
Pleuricospora fimbriolata | | Native |
Pleurocoronis | ARROWLEAF | |
Pleurocoronis pluriseta | | Native |
Pleuropogon ↳ Key to Pleuropogon | SEMAPHORE GRASS | |
Pleuropogon californicus | | Native |
Pleuropogon californicus var. californicus | | Native |
Pleuropogon californicus var. davyi | DAVY'S SEMAPHORE GRASS | Native |
Pleuropogon davyi (Under Pleuropogon californicus var. davyi) | | Synonym |
Pleuropogon hooverianus | NORTH COAST SEMAPHORE GRASS | Native |
Pleuropogon refractus | NODDING SEMAPHORE GRASS | Native |
Pluchea ↳ Key to Pluchea | | |
Pluchea odorata var. odorata | SALTMARSH-FLEABANE | Native |
Pluchea sericea | ARROW-WEED | Native |
Plumbaginaceae ↳ Key to Plumbaginaceae | LEADWORT FAMILY | |
Plumbago | LEADWORT | |
Plumbago auriculata | CAPE LEADWORT | Waif |
Pneumonanthe newberryi var. tiogana (Under Gentiana newberryi var. tiogana) | | Synonym |
Poa ↳ Key to Poa | BLUE GRASS | |
Poa ×limosa (Under Poa secunda subsp. juncifolia) | | Synonym |
Poa abbreviata | DWARF BLUE GRASS | Native |
Poa abbreviata subsp. marshii | MARSH'S BLUE GRASS | Native |
Poa abbreviata subsp. pattersonii | PATTERSON'S BLUE GRASS | Native |
Poa alpina var. purpurascens (Under Poa cusickii subsp. purpurascens) | | Synonym |
Poa annua | ANNUAL BLUE GRASS | Naturalized |
Poa atropurpurea | SAN BERNARDINO BLUE GRASS | Native |
Poa bigelovii | | Native |
Poa bolanderi | | Native |
Poa bolanderi var. howellii (Under Poa howellii) | | Synonym |
Poa bulbosa | | Naturalized |
Poa bulbosa subsp. bulbosa | | Waif |
Poa bulbosa subsp. vivipara | | Naturalized |
Poa bulbosa var. bulbosa (Under Poa bulbosa subsp. bulbosa) | | Synonym |
Poa bulbosa var. vivipara (Under Poa bulbosa subsp. vivipara) | | Synonym |
Poa canbyi (Under Poa secunda subsp. secunda) | | Synonym |
Poa compressa | CANADIAN BLUE GRASS | Naturalized |
Poa confinis | BEACH BLUE GRASS | Native |
Poa cusickii | | Native |
Poa cusickii subsp. cusickii | | Native |
Poa cusickii subsp. epilis | SKYLINE BLUE GRASS | Native |
Poa cusickii subsp. pallida | | Native |
Poa cusickii subsp. purpurascens | | Native |
Poa diaboli | DIABLO CANYON BLUE GRASS | Native |
Poa douglasii | SAND DUNE BLUE GRASS | Native |
Poa douglasii subsp. macrantha (Under Poa macrantha) | | Synonym |
Poa epilis (Under Poa cusickii subsp. epilis) | | Synonym |
Poa fendleriana | | Native |
Poa fendleriana subsp. fendleriana | MUTTON GRASS | Native |
Poa fendleriana subsp. longiligula | LONG-TONGUE MUTTON GRASS | Native |
Poa glauca subsp. rupicola | TIMBERLINE BLUE GRASS | Native |
Poa gracillima (Under Poa secunda subsp. secunda) | | Synonym |
Poa hansenii (Under Poa cusickii subsp. cusickii) | | Synonym |
Poa howellii | | Native |
Poa incurva (Under Poa secunda subsp. secunda) | | Synonym |
Poa infirma | WEAK BLUE GRASS | Naturalized |
Poa keckii | | Native |
Poa kelloggii | KELLOGG'S BLUE GRASS | Native |
Poa lemmonii (Under Puccinellia lemmonii) | | Synonym |
Poa leptocoma subsp. leptocoma | BOG BLUE GRASS | Native |
Poa lettermanii | LETTERMAN'S BLUE GRASS | Native |
Poa longiligula (Under Poa fendleriana subsp. longiligula) | | Synonym |
Poa macrantha | SEASHORE BLUE GRASS | Native |
Poa napensis | NAPA BLUE GRASS | Native |
Poa nemoralis | WOOD BLUE GRASS | Naturalized |
Poa nemoralis subsp. nemoralis (Under Poa nemoralis) | | Synonym |
Poa nervosa (Under Poa wheeleri) | | Misapplied name |
Poa palustris | FOWL BLUE GRASS | Naturalized |
Poa pattersonii (Under Poa abbreviata subsp. pattersonii) | | Synonym |
Poa piperi | PIPER'S BLUE GRASS | Native |
Poa pratensis subsp. pratensis | KENTUCKY BLUE GRASS | Naturalized |
Poa pringlei | | Native |
Poa purpurascens (Under Poa cusickii subsp. purpurascens) | | Illegitimate name |
Poa rhizomata | TIMBER BLUE GRASS | Native |
Poa rhizomata (Under Poa piperi) | | Misapplied name |
Poa rupicola (Under Poa glauca subsp. rupicola) | | Synonym |
Poa sandbergii (Under Poa secunda subsp. secunda) | | Synonym |
Poa scabrella (Under Poa secunda subsp. secunda) | | Synonym |
Poa secunda | NEVADA BLUE GRASS | Native |
Poa secunda subsp. juncifolia | | Native |
Poa secunda subsp. secunda | ONE-SIDED BLUE GRASS | Native |
Poa sierrae | SIERRA BLUE GRASS | Native |
Poa stebbinsii | | Native |
Poa subaristata (Under Poa cusickii subsp. pallida) | | Illegitimate name |
Poa suksdorfii (Under Poa keckii) | | Misapplied name |
Poa tenerrima | DELICATE BLUE GRASS | Native |
Poa trivialis | ROUGH BLUE GRASS | Naturalized |
Poa unilateralis subsp. unilateralis | SAN FRANCISCO BLUE GRASS | Native |
Poa wheeleri | | Native |
Poaceae (Gramineae) ↳ Key to Poaceae (Gramineae) | GRASS FAMILY | |
Podagrostis humilis (Under Agrostis humilis) | | Synonym |
Podagrostis thurberiana (Under Agrostis humilis) | | Synonym |
Podistera | | |
Podistera nevadensis | SIERRA PODISTERA | Native |
Pogogyne ↳ Key to Pogogyne | BEARDSTYLE, MESA MINT | |
Pogogyne abramsii | SAN DIEGO MESA MINT | Native |
Pogogyne clareana | SANTA LUCIA MINT | Native |
Pogogyne douglasii | DOUGLAS' BEARDSTYLE | Native |
Pogogyne floribunda | PROFUSE-FLOWERED POGOGYNE | Native |
Pogogyne nudiuscula | OTAY MESA MINT | Native |
Pogogyne serpylloides | THYMELEAF BEARDSTYLE | Native |
Pogogyne serpylloides subsp. intermedia (Under Pogogyne serpylloides) | | Synonym |
Pogogyne zizyphoroides | SACRAMENTO BEARDSTYLE | Native |
Poinciana gilliesii (Under Caesalpinia gilliesii) | | Synonym |
Poinciana spinosa (Under Caesalpinia spinosa) | | Synonym |
Polanisia | | |
Polanisia dodecandra subsp. trachysperma | WESTERN CLAMMYWEED | Native |
Polanisia trachysperma (Under Polanisia dodecandra subsp. trachysperma) | | Synonym |
Polemoniaceae ↳ Key to Polemoniaceae | PHLOX FAMILY | |
Polemonium ↳ Key to Polemonium | | |
Polemonium californicum | | Native |
Polemonium carneum | OREGON POLEMONIUM | Native |
Polemonium chartaceum | MASON'S SKY PILOT | Native |
Polemonium eddyense | MOUNT EDDY SKY PILOT | Native |
Polemonium eximium | | Native |
Polemonium micranthum | | Native |
Polemonium occidentale | | Native |
Polemonium occidentale subsp. occidentale (Under Polemonium occidentale) | | Synonym |
Polemonium pulcherrimum | | Native |
Polemonium pulcherrimum var. pulcherrimum | | Native |
Polemonium pulcherrimum var. shastense | | Native |
Polemonium shastense (Under Polemonium pulcherrimum var. shastense) | | Synonym |
Poliomintha | | |
Poliomintha incana | FROSTED MINT | Native |
Polycarpon | POLYCARP | |
Polycarpon depressum (Under Polycarpon tetraphyllum subsp. depressum) | | Synonym |
Polycarpon tetraphyllum ↳ Key to Polycarpon tetraphyllum | | Native |
Polycarpon tetraphyllum subsp. depressum | | Native |
Polycarpon tetraphyllum subsp. tetraphyllum | FOUR-LEAVED ALLSEED | Naturalized |
Polyctenium | | |
Polyctenium fremontii | | Native |
Polyctenium fremontii var. confertum (Under Polyctenium fremontii) | | Synonym |
Polyctenium fremontii var. fremontii (Under Polyctenium fremontii) | | Synonym |
Polyctenium williamsiae (Under Polyctenium fremontii) | | Synonym |
Polygala acanthoclada (Under Rhinotropis acanthoclada) | | Synonym |
Polygala acanthoclada var. intricata (Under Rhinotropis intermontana) | | Synonym |
Polygala californica (Under Rhinotropis californica) | | Synonym |
Polygala cornuta (Under Rhinotropis cornuta) | | Synonym |
Polygala cornuta subsp. fishiae (Under Rhinotropis cornuta var. fishiae) | | Synonym |
Polygala cornuta var. cornuta (Under Rhinotropis cornuta var. cornuta) | | Synonym |
Polygala cornuta var. fishiae (Under Rhinotropis cornuta var. fishiae) | | Synonym |
Polygala heterorhyncha (Under Rhinotropis heterorhyncha) | | Synonym |
Polygala intermontana (Under Rhinotropis intermontana) | | Synonym |
Polygala subspinosa (Under Rhinotropis subspinosa) | | Synonym |
Polygala subspinosa var. heterorhyncha (Under Rhinotropis heterorhyncha) | | Synonym |
Polygalaceae | MILKWORT FAMILY | |
Polygonaceae ↳ Key to Polygonaceae | BUCKWHEAT FAMILY | |
Polygonum ↳ Key to Polygonum | KNOTWEED | |
Polygonum aequale (Under Polygonum aviculare subsp. depressum) | | Synonym |
Polygonum amphibium (Under Persicaria amphibia) | | Synonym |
Polygonum amphibium var. emersum (Under Persicaria amphibia) | | Synonym |
Polygonum amphibium var. stipulaceum (Under Persicaria amphibia) | | Synonym |
Polygonum arenastrum (Under Polygonum aviculare subsp. depressum) | | Synonym |
Polygonum argyrocoleon | PERSIAN KNOTWEED | Naturalized |
Polygonum aubertii (Under Fallopia baldschuanica) | | Synonym |
Polygonum austiniae | MRS. AUSTIN'S KNOTWEED | Native |
Polygonum aviculare | KNOTWEED, KNOTGRASS | Naturalized |
Polygonum aviculare subsp. aviculare | | Naturalized |
Polygonum aviculare subsp. buxiforme | | Waif |
Polygonum aviculare subsp. depressum | | Naturalized |
Polygonum aviculare subsp. neglectum | | Waif |
Polygonum aviculare subsp. rectum (Under Polygonum aviculare subsp. neglectum) | | Synonym |
Polygonum aviculare subsp. rurivagum | | Waif |
Polygonum baldschuanicum (Under Fallopia baldschuanica) | | Synonym |
Polygonum bidwelliae | BIDWELL'S KNOTWEED | Native |
Polygonum bistortoides (Under Bistorta bistortoides) | | Synonym |
Polygonum bolanderi | BOLANDER'S KNOTWEED | Native |
Polygonum buxiforme (Under Polygonum aviculare subsp. buxiforme) | | Synonym |
Polygonum calcatum (Under Polygonum aviculare subsp. depressum) | | Synonym |
Polygonum californicum | | Native |
Polygonum capitatum (Under Persicaria capitata) | | Synonym |
Polygonum confertiflorum (Under Polygonum polygaloides subsp. confertiflorum) | | Synonym |
Polygonum convolvulus (Under Fallopia convolvulus) | | Synonym |
Polygonum cuspidatum (Under Fallopia japonica) | | Synonym |
Polygonum davisiae (Under Aconogonon davisiae) | | Synonym |
Polygonum douglasii | DOUGLAS' KNOTWEED | Native |
Polygonum douglasii subsp. austiniae (Under Polygonum austiniae) | | Synonym |
Polygonum douglasii subsp. douglasii (Under Polygonum douglasii) | | Synonym |
Polygonum douglasii subsp. johnstonii (Under Polygonum sawatchense subsp. sawatchense) | | Synonym |
Polygonum douglasii subsp. majus (Under Polygonum majus) | | Synonym |
Polygonum douglasii subsp. spergulariiforme (Under Polygonum spergulariiforme) | | Synonym |
Polygonum douglasii var. johnstonii (Under Polygonum sawatchense subsp. sawatchense) | | Synonym |
Polygonum douglasii var. latifolium (Under Polygonum douglasii) | | Synonym |
Polygonum emaciatum (Under Polygonum douglasii) | | Synonym |
Polygonum esotericum (Under Polygonum polygaloides subsp. esotericum) | | Synonym |
Polygonum exile (Under Polygonum sawatchense subsp. sawatchense) | | Synonym |
Polygonum exsertum (Under Polygonum ramosissimum subsp. ramosissimum) | | Synonym |
Polygonum fowleri subsp. fowleri | | Waif |
Polygonum fusiforme (Under Persicaria maculosa) | | Synonym |
Polygonum hickmanii | SCOTTS VALLEY POLYGONUM | Native |
Polygonum hydropiper (Under Persicaria hydropiper) | | Synonym |
Polygonum hydropiperoides (Under Persicaria hydropiperoides) | | Synonym |
Polygonum hydropiperoides var. asperifolia (Under Persicaria hydropiperoides) | | Synonym |
Polygonum interior (Under Polygonum ramosissimum subsp. ramosissimum) | | Synonym |
Polygonum kelloggii (Under Polygonum polygaloides subsp. kelloggii) | | Synonym |
Polygonum kelloggii var. confertiflorum (Under Polygonum polygaloides subsp. confertiflorum) | | Synonym |
Polygonum lapathifolium (Under Persicaria lapathifolia) | | Synonym |
Polygonum lapathifolium var. salicifolium (Under Persicaria lapathifolia) | | Synonym |
Polygonum latum (Under Polygonum ramosissimum subsp. ramosissimum) | | Synonym |
Polygonum leptocarpum (Under Polygonum ramosissimum subsp. ramosissimum) | | Synonym |
Polygonum majus | WIRY KNOTWEED | Native |
Polygonum marinense | MARIN KNOTWEED | Native |
Polygonum microspermum (Under Polygonum aviculare subsp. depressum) | | Synonym |
Polygonum minimum | | Native |
Polygonum montanum (Under Polygonum douglasii) | | Synonym |
Polygonum neglectum (Under Polygonum aviculare subsp. neglectum) | | Synonym |
Polygonum newberryi (Under Aconogonon newberryi) | | Synonym |
Polygonum omissum (Under Persicaria pensylvanica) | | Synonym |
Polygonum paronychia | | Native |
Polygonum parryi | PARRY'S or PRICKLY KNOTWEED | Native |
Polygonum patulum (Under Polygonum ramosissimum) | | Misapplied name |
Polygonum pensylvanicum (Under Persicaria pensylvanica) | | Synonym |
Polygonum pensylvanicum var. durum (Under Persicaria pensylvanica) | | Synonym |
Polygonum pensylvanicum var. eglandulosum (Under Persicaria pensylvanica) | | Synonym |
Polygonum pensylvanicum var. laevigatum (Under Persicaria pensylvanica) | | Synonym |
Polygonum pensylvanicum var. nesophilum (Under Persicaria pensylvanica) | | Synonym |
Polygonum pensylvanicum var. rosiflorum (Under Persicaria pensylvanica) | | Synonym |
Polygonum persicaria (Under Persicaria maculosa) | | Synonym |
Polygonum phytolaccifolium (Under Aconogonon phytolaccifolium) | | Synonym |
Polygonum polygaloides | POLYGALA KNOTWEED | Native |
Polygonum polygaloides subsp. confertiflorum | | Native |
Polygonum polygaloides subsp. esotericum | MODOC COUNTY KNOTWEED | Native |
Polygonum polygaloides subsp. kelloggii | | Native |
Polygonum polystachyum (Under Persicaria wallichii) | | Synonym |
Polygonum prolificum (Under Polygonum ramosissimum subsp. prolificum) | | Synonym |
Polygonum punctatum (Under Persicaria punctata) | | Synonym |
Polygonum punctatum var. confertiflorum (Under Persicaria punctata) | | Synonym |
Polygonum punctatum var. ellipticum (Under Persicaria punctata) | | Synonym |
Polygonum punctatum var. leptostachyum (Under Persicaria punctata) | | Synonym |
Polygonum punctatum var. parviflorum (Under Persicaria punctata) | | Synonym |
Polygonum puritanorum (Under Persicaria maculosa) | | Synonym |
Polygonum ramosissimum | BUSHY KNOTWEED | Native |
Polygonum ramosissimum subsp. prolificum | | Naturalized |
Polygonum ramosissimum subsp. ramosissimum | | Native |
Polygonum ramosissimum var. prolificum (Under Polygonum ramosissimum subsp. prolificum) | | Synonym |
Polygonum rurivagum (Under Polygonum aviculare subsp. rurivagum) | | Synonym |
Polygonum sachalinense (Under Fallopia sachalinensis) | | Synonym |
Polygonum sawatchense | | Native |
Polygonum sawatchense subsp. oblivium | | Native |
Polygonum sawatchense subsp. sawatchense | | Native |
Polygonum scabrum (Under Persicaria lapathifolia) | | Synonym |
Polygonum shastense | | Native |
Polygonum spergulariiforme | | Native |
Polygonum stevensii (Under Polygonum ramosissimum subsp. ramosissimum) | | Synonym |
Polygonum torreyi (Under Polygonum minimum) | | Synonym |
Polygonum triandrum (Under Polygonum sawatchense subsp. sawatchense) | | Synonym |
Polygonum triangulum (Under Polygonum ramosissimum subsp. ramosissimum) | | Synonym |
Polygonum unifolium (Under Polygonum polygaloides subsp. kelloggii) | | Synonym |
Polygonum watsonii (Under Polygonum polygaloides subsp. confertiflorum) | | Synonym |
Polypodiaceae | POLYPODY FAMILY | |
Polypodium ↳ Key to Polypodium | POLYPODY | |
Polypodium californicum | CALIFORNIA POLYPODY | Native |
Polypodium calirhiza | | Native |
Polypodium glycyrrhiza | LICORICE FERN | Native |
Polypodium hesperium | WESTERN POLYPODY | Native |
Polypodium scouleri | LEATHER-LEAF FERN | Native |
Polypodium vulgare var. columbianum (Under Polypodium hesperium) | | Synonym |
Polypogon ↳ Key to Polypogon | BEARD GRASS | |
Polypogon australis | CHILEAN BEARD GRASS | Naturalized |
Polypogon elongatus (Under Polypogon imberbis) | | Misapplied name |
Polypogon imberbis | | Naturalized |
Polypogon interruptus | DITCH BEARD GRASS | Native |
Polypogon maritimus | MEDITERRANEAN BEARD GRASS | Naturalized |
Polypogon monspeliensis | ANNUAL BEARD GRASS, RABBITFOOT GRASS | Naturalized |
Polypogon semiverticillatus (Under Polypogon viridis) | | Synonym |
Polypogon viridis | WATER BEARD GRASS | Naturalized |
Polystichum ↳ Key to Polystichum | SWORD FERN | |
Polystichum californicum | | Native |
Polystichum dudleyi | | Native |
Polystichum imbricans | | Native |
Polystichum imbricans subsp. curtum | | Native |
Polystichum imbricans subsp. imbricans | | Native |
Polystichum kruckebergii | KRUCKEBERG'S SWORD FERN | Native |
Polystichum lemmonii | | Native |
Polystichum lonchitis | HOLLY FERN | Native |
Polystichum munitum | WESTERN SWORD FERN | Native |
Polystichum munitum subsp. imbricans (Under Polystichum imbricans subsp. imbricans) | | Synonym |
Polystichum munitum subsp. nudatum (Under Polystichum imbricans subsp. imbricans) | | Synonym |
Polystichum scopulinum | | Native |
Pontederiaceae ↳ Key to Pontederiaceae | PICKEREL-WEED FAMILY | |
Populus ↳ Key to Populus | COTTONWOOD | |
Populus alba | WHITE POPLAR | Naturalized |
Populus angustifolia | NARROW-LEAVED COTTONWOOD | Native |
Populus balsamifera subsp. trichocarpa (Under Populus trichocarpa) | | Synonym |
Populus deltoides var. fremontii (Under Populus fremontii subsp. fremontii) | | Synonym |
Populus fremontii subsp. fremontii | ALAMO or FREMONT COTTONWOOD | Native |
Populus fremontii var. arizonica (Under Populus fremontii subsp. fremontii) | | Synonym |
Populus fremontii var. macdougalii (Under Populus fremontii subsp. fremontii) | | Synonym |
Populus nigra | BLACK POPLAR, LOMBARDY POPLAR | Naturalized |
Populus nigra var. italica (Under Populus nigra) | | Synonym |
Populus tremuloides | QUAKING ASPEN | Native |
Populus trichocarpa | BLACK COTTONWOOD | Native |
Porophyllum ↳ Key to Porophyllum | | |
Porophyllum gracile | ODORA, SLENDER PORELEAF | Native |
Porophyllum ruderale var. macrocephalum | YERBA POROSA | Agricultural weed |
Porterella | | |
Porterella carnosula | | Native |
Portulaca ↳ Key to Portulaca | | |
Portulaca granulato-stellulata (Under Portulaca oleracea) | | Synonym |
Portulaca halimoides | DESERT PORTULACA | Native |
Portulaca nitida (Under Portulaca oleracea) | | Synonym |
Portulaca oleracea | PURSLANE | Naturalized |
Portulaca oleracea subsp. granulato-stellulata (Under Portulaca oleracea) | | Synonym |
Portulaca oleracea subsp. nitida (Under Portulaca oleracea) | | Synonym |
Portulaca oleracea subsp. oleracea (Under Portulaca oleracea) | | Synonym |
Portulaca oleracea subsp. papillato-stellulata (Under Portulaca oleracea) | | Synonym |
Portulaca papillato-stellulata (Under Portulaca oleracea) | | Synonym |
Portulaca parvula (Under Portulaca halimoides) | | Synonym |
Portulaca retusa (Under Portulaca oleracea) | | Synonym |
Portulacaceae | PURSLANE FAMILY | |
Potamogeton ↳ Key to Potamogeton | PONDWEED | |
Potamogeton alpinus | | Native |
Potamogeton alpinus subsp. tenuifolius (Under Potamogeton alpinus) | | Synonym |
Potamogeton alpinus var. subellipticus (Under Potamogeton alpinus) | | Synonym |
Potamogeton alpinus var. tenuifolius (Under Potamogeton alpinus) | | Synonym |
Potamogeton amplifolius | BROAD-LEAVED PONDWEED | Native |
Potamogeton berchtoldii | | Native |
Potamogeton crispus | CRISP-LEAVED PONDWEED | Naturalized |
Potamogeton diversifolius | DIVERSE-LEAVED PONDWEED | Native |
Potamogeton epihydrus | NUTTALL'S RIBBON-LEAVED PONDWEED | Native |
Potamogeton epihydrus subsp. nuttallii (Under Potamogeton epihydrus) | | Synonym |
Potamogeton fibrillosus (Under Potamogeton foliosus subsp. fibrillosus) | | Synonym |
Potamogeton filiformis var. alpinus (Under Stuckenia filiformis subsp. alpina) | | Synonym |
Potamogeton filiformis var. macounii (Under Stuckenia filiformis subsp. alpina) | | Synonym |
Potamogeton foliosus | LEAFY PONDWEED | Native |
Potamogeton foliosus subsp. fibrillosus | FIBROUS PONDWEED | Native |
Potamogeton foliosus subsp. foliosus | | Native |
Potamogeton foliosus var. fibrillosus (Under Potamogeton foliosus subsp. fibrillosus) | | Synonym |
Potamogeton foliosus var. foliosus (Under Potamogeton foliosus subsp. foliosus) | | Synonym |
Potamogeton gramineus | GRASS-LEAVED PONDWEED | Native |
Potamogeton illinoensis | SHINING PONDWEED | Native |
Potamogeton latifolius (Under Stuckenia striata) | | Synonym |
Potamogeton natans | FLOATING-LEAVED PONDWEED | Native |
Potamogeton nodosus | LONG-LEAVED PONDWEED | Native |
Potamogeton pectinatus (Under Stuckenia pectinata) | | Synonym |
Potamogeton praelongus | WHITE-STEMMED PONDWEED | Native |
Potamogeton pusillus | SMALL PONDWEED | Native |
Potamogeton pusillus subsp. pusillus (Under Potamogeton pusillus) | | Synonym |
Potamogeton pusillus subsp. tenuissimus (Under Potamogeton berchtoldii) | | Synonym |
Potamogeton pusillus var. pusillus (Under Potamogeton pusillus) | | Synonym |
Potamogeton pusillus var. tenuissimus (Under Potamogeton berchtoldii) | | Synonym |
Potamogeton richardsonii | RICHARDSON'S PONDWEED | Native |
Potamogeton robbinsii | ROBBINS' PONDWEED | Native |
Potamogeton zosteriformis | EEL-GRASS PONDWEED | Native |
Potamogetonaceae ↳ Key to Potamogetonaceae | PONDWEED FAMILY | |
Potentilla ↳ Key to Potentilla | CINQUEFOIL | |
Potentilla anglica | ENGLISH CINQUEFOIL | Naturalized |
Potentilla anserina | | Native |
Potentilla anserina subsp. anserina | COMMON SILVERWEED | Native |
Potentilla anserina subsp. pacifica | PACIFIC SILVERWEED | Native |
Potentilla anserina var. sericea (Under Potentilla anserina subsp. anserina) | | Synonym |
Potentilla basaltica | BLACK ROCK POTENTILLA | Native |
Potentilla beanii (Under Potentilla concinna var. proxima) | | Synonym |
Potentilla biennis | BIENNIAL or GREENE'S CINQUEFOIL | Native |
Potentilla breweri | BREWER'S CINQUEFOIL | Native |
Potentilla bruceae | BRUCE'S CINQUEFOIL | Native |
Potentilla callida (Under Ivesia callida) | | Synonym |
Potentilla concinna var. proxima | EARLY CINQUEFOIL | Native |
Potentilla cristae | CRESTED POTENTILLA | Native |
Potentilla diversifolia (Under Potentilla glaucophylla var. glaucophylla) | | Misapplied name |
Potentilla drummondii | DRUMMOND'S CINQUEFOIL | Native |
Potentilla drummondii subsp. breweri (Under Potentilla breweri) | | Synonym |
Potentilla drummondii subsp. bruceae (Under Potentilla bruceae) | | Synonym |
Potentilla egedei var. grandis (Under Potentilla anserina subsp. pacifica) | | Synonym |
Potentilla elata var. dissita (Under Horkelia californica var. elata) | | Synonym |
Potentilla flabellifolia | FAN-FOIL, FANLEAF CINQUEFOIL | Native |
Potentilla flabellifolia var. grayi (Under Potentilla grayi) | | Synonym |
Potentilla flabelliformis (Under Potentilla gracilis var. flabelliformis) | | Synonym |
Potentilla flabelliformis var. inyoensis (Under Potentilla gracilis var. elmeri) | | Synonym |
Potentilla frondosa (Under Horkelia californica var. frondosa) | | Synonym |
Potentilla fruticosa (Under Dasiphora fruticosa) | | Synonym |
Potentilla glandulosa (Under Drymocallis glandulosa) | | Synonym |
Potentilla glandulosa subsp. ashlandica (Under Drymocallis lactea var. austiniae) | | Misapplied name |
Potentilla glandulosa subsp. ewanii (Under Drymocallis cuneifolia var. ewanii) | | Synonym |
Potentilla glandulosa subsp. glandulosa (Under Drymocallis glandulosa var. glandulosa) | | Synonym |
Potentilla glandulosa subsp. globosa (Under Drymocallis rhomboidea) | | Synonym |
Potentilla glandulosa subsp. hansenii (Under Drymocallis hansenii) | | Synonym |
Potentilla glandulosa subsp. nevadensis (Under Drymocallis lactea var. lactea) | | Synonym |
Potentilla glandulosa subsp. pseudorupestris (Under Drymocallis pseudorupestris) | | Synonym |
Potentilla glandulosa subsp. reflexa (Under Drymocallis glandulosa var. reflexa) | | Synonym |
Potentilla glaucophylla var. glaucophylla | BLUELEAF CINQUEFOIL | Native |
Potentilla gracilis | SLENDER CINQUEFOIL | Native |
Potentilla gracilis subsp. nuttallii (Under Potentilla gracilis var. fastigiata) | | Synonym |
Potentilla gracilis var. elmeri | | Native |
Potentilla gracilis var. fastigiata | | Native |
Potentilla gracilis var. flabelliformis | | Native |
Potentilla gracilis var. glabrata (Under Potentilla gracilis var. fastigiata) | | Synonym |
Potentilla gracilis var. gracilis | | Native |
Potentilla gracilis var. permollis (Under Potentilla gracilis var. fastigiata) | | Synonym |
Potentilla gracilis var. pulcherrima (Under Potentilla pulcherrima) | | Synonym |
Potentilla grayi | GRAY'S CINQUEFOIL | Native |
Potentilla hickmanii | HICKMAN'S CINQUEFOIL | Native |
Potentilla howellii (Under Horkelia sericata) | | Synonym |
Potentilla jepsonii | JEPSON'S CINQUEFOIL | Native |
Potentilla millefolia | FEATHER CINQUEFOIL | Native |
Potentilla morefieldii | MOREFIELD'S CINQUEFOIL | Native |
Potentilla multijuga | BALLONA CINQUEFOIL | Native |
Potentilla newberryi | NEWBERRY'S CINQUEFOIL | Native |
Potentilla norvegica | NORWEGIAN or ROUGH CINQUEFOIL | Naturalized |
Potentilla norvegica subsp. monspeliensis (Under Potentilla norvegica) | | Synonym |
Potentilla palustris (Under Comarum palustre) | | Synonym |
Potentilla patellifera (Under Ivesia patellifera) | | Synonym |
Potentilla pectinisecta (Under Potentilla gracilis var. elmeri) | | Synonym |
Potentilla peirsonii (Under Drymocallis cuneifolia var. cuneifolia) | | Synonym |
Potentilla pensylvanica | PRAIRIE CINQUEFOIL | Native |
Potentilla pensylvanica var. ovium (Under Potentilla jepsonii) | | Synonym |
Potentilla pseudosericea | MONO CINQUEFOIL | Native |
Potentilla pulcherrima | BEAUTIFUL CINQUEFOIL | Native |
Potentilla recta | SULPHUR CINQUEFOIL | Naturalized |
Potentilla rhomboidea (Under Drymocallis rhomboidea) | | Synonym |
Potentilla rimicola | CLIFF CINQUEFOIL | Native |
Potentilla rivalis | BROOK or RIVER CINQUEFOIL | Native |
Potentilla rivalis var. millegrana (Under Potentilla rivalis) | | Synonym |
Potentilla rosulata (Under Ivesia saxosa) | | Synonym |
Potentilla saxosa (Under Ivesia saxosa) | | Synonym |
Potentilla saxosa subsp. sierrae (Under Ivesia saxosa) | | Synonym |
Potentilla subvillosa (Under Potentilla bruceae) | | Synonym |
Potentilla uliginosa | CUNNINGHAM MARSH CINQUEFOIL | Native |
Potentilla wheeleri | WHEELER'S CINQUEFOIL | Native |
Potentilla wheeleri var. rimicola (Under Potentilla rimicola) | | Synonym |
Poteridium | | |
Poteridium annuum | WESTERN BURNET | Native |
Poterium | | |
Poterium sanguisorba | GARDEN BURNET | Naturalized |
Prenanthella | | |
Prenanthella exigua | BRIGHTWHITE | Native |
Primula ↳ Key to Primula | PRIMROSE, SHOOTING STAR | |
Primula clevelandii | | Native |
Primula clevelandii var. clevelandii | | Native |
Primula clevelandii var. gracilis | | Native |
Primula clevelandii var. insularis | | Native |
Primula clevelandii var. patula | | Native |
Primula conjugens | | Native |
Primula fragrans | | Native |
Primula hendersonii | MOSQUITO BILL(S), SAILOR CAPS | Native |
Primula jeffreyi | SIERRA SHOOTING STAR | Native |
Primula pauciflora | BEAUTIFUL SHOOTING STAR | Native |
Primula pauciflora var. macrocarpa (Under Primula pauciflora) | | Synonym |
Primula pauciflora var. monantha (Under Primula pauciflora) | | Synonym |
Primula pauciflora var. shoshonensis (Under Primula pauciflora) | | Synonym |
Primula subalpina | | Native |
Primula suffrutescens | SIERRA PRIMROSE | Native |
Primula tetrandra | ALPINE SHOOTING STAR | Native |
Primulaceae ↳ Key to Primulaceae | PRIMROSE FAMILY | |
Proboscidea ↳ Key to Proboscidea | UNICORN-PLANT | |
Proboscidea althaeifolia | DESERT UNICORN-PLANT | Native |
Proboscidea altheaefolia (Under Proboscidea althaeifolia) | | Orthographic variant |
Proboscidea louisianica subsp. louisianica | | Naturalized |
Proboscidea lutea | | Naturalized |
Prosartes ↳ Key to Prosartes | | |
Prosartes hookeri | | Native |
Prosartes hookeri var. hookeri (Under Prosartes hookeri) | | Synonym |
Prosartes hookeri var. parvifolia (Under Prosartes parvifolia) | | Synonym |
Prosartes hookeri var. trachyandra (Under Prosartes hookeri) | | Synonym |
Prosartes parvifolia | SISKIYOU BELLS | Native |
Prosartes smithii | | Native |
Prosopis glandulosa var. torreyana (Under Neltuma odorata) | | Synonym |
Prosopis juliflora var. torreyana (Under Neltuma odorata) | | Synonym |
Prosopis juliflora var. velutina (Under Neltuma velutina) | | Synonym |
Prosopis pubescens (Under Strombocarpa pubescens) | | Synonym |
Prosopis strombulifera (Under Strombocarpa strombulifera) | | Synonym |
Prosopis velutina (Under Neltuma velutina) | | Synonym |
Proteaceae | PROTEA FAMILY | |
Prunella | SELF-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. lanceolata | | Native |
Prunella vulgaris var. parviflora (Under Prunella vulgaris var. vulgaris) | | Synonym |
Prunella vulgaris var. vulgaris | | Naturalized |
Prunus ↳ Key to Prunus | | |
Prunus amygdalus (Under Prunus dulcis) | | Synonym |
Prunus andersonii | DESERT PEACH | Native |
Prunus cerasifera | CHERRY PLUM | Naturalized |
Prunus dulcis | ALMOND | Naturalized |
Prunus emarginata | BITTER CHERRY | Native |
Prunus eremophila | MOJAVE DESERT PLUM | Native |
Prunus fasciculata | DESERT ALMOND | Native |
Prunus fasciculata var. fasciculata | | Native |
Prunus fasciculata var. punctata | SAND ALMOND | Native |
Prunus fremontii | DESERT APRICOT | Native |
Prunus ilicifolia | | Native |
Prunus ilicifolia subsp. ilicifolia | ISLAY, HOLLY-LEAFED CHERRY | Native |
Prunus ilicifolia subsp. lyonii | CATALINA CHERRY | Native |
Prunus lyonii (Under Prunus ilicifolia subsp. lyonii) | | Synonym |
Prunus persica | PEACH | Naturalized |
Prunus subcordata | PACIFIC PLUM, SIERRA PLUM | Native |
Prunus virginiana var. demissa | WESTERN CHOKE CHERRY | Native |
Psathyrotes ↳ Key to Psathyrotes | | |
Psathyrotes annua | | Native |
Psathyrotes ramosissima | TURTLEBACK | Native |
Pseudobahia ↳ Key to Pseudobahia | | |
Pseudobahia bahiifolia | HARTWEG'S GOLDEN SUNBURST | Native |
Pseudobahia bahiifolia var. pinnatifida (Under Pseudobahia heermannii) | | Synonym ined. |
Pseudobahia heermannii | FOOTHILL SUNBURST, BRITTLESTEM | Native |
Pseudobahia peirsonii | SAN JOAQUIN ADOBE SUNBURST | Native |
Pseudognaphalium ↳ Key to Pseudognaphalium | CUDWEED, EVERLASTING | |
Pseudognaphalium beneolens | | Native |
Pseudognaphalium biolettii | | Native |
Pseudognaphalium californicum | | Native |
Pseudognaphalium canescens | | Native |
Pseudognaphalium canescens subsp. beneolens (Under Pseudognaphalium beneolens) | | Synonym |
Pseudognaphalium leucocephalum | WHITE RABBIT-TOBACCO | Native |
Pseudognaphalium luteoalbum | | Naturalized |
Pseudognaphalium macounii | MACOUN'S EVERLASTING | Native |
Pseudognaphalium microcephalum | | Native |
Pseudognaphalium microcephalum var. thermale (Under Pseudognaphalium thermale) | | Synonym |
Pseudognaphalium ramosissimum | | Native |
Pseudognaphalium roseum | | Native |
Pseudognaphalium stramineum | | Native |
Pseudognaphalium thermale | | Native |
Pseudoroegneria spicata (Under Elymus spicatus) | | Synonym |
Pseudoroegneria spicata subsp. spicata (Under Elymus spicatus) | | Synonym |
Pseudorontium | | |
Pseudorontium cyathiferum | DEEP CANYON SNAPDRAGON | Native |
Pseudostellaria jamesiana (Under Torreyostellaria jamesiana) | | Synonym |
Pseudostellaria sierrae (Under Hartmaniella sierrae) | | Synonym |
Pseudotrillium | | |
Pseudotrillium rivale | BROOK WAKEROBIN | Native |
Pseudotsuga ↳ Key to Pseudotsuga | | |
Pseudotsuga macrocarpa | BIGCONE DOUGLAS-FIR, BIGCONE SPRUCE | Native |
Pseudotsuga menziesii var. menziesii | DOUGLAS-FIR | Native |
Psilocarphus ↳ Key to Psilocarphus | WOOLLY-MARBLES, WOOLLYHEADS | |
Psilocarphus brevissimus | | Native |
Psilocarphus brevissimus var. brevissimus | DWARF WOOLLYHEADS | Native |
Psilocarphus brevissimus var. multiflorus | DELTA WOOLLY-MARBLES | Native |
Psilocarphus chilensis | ROUND WOOLLY-MARBLES | Native |
Psilocarphus elatior | TALL WOOLLY-MARBLES | Native |
Psilocarphus globiferus (Under Psilocarphus brevissimus var. brevissimus) | | Synonym |
Psilocarphus globiferus (Under Psilocarphus chilensis) | | Synonym |
Psilocarphus globiferus (Under Psilocarphus chilensis) | | Synonym, in part |
Psilocarphus oregonus | OREGON WOOLLYHEADS | Native |
Psilocarphus tenellus | SLENDER WOOLLY-MARBLES | Native |
Psilocarphus tenellus var. globiferus (Under Psilocarphus chilensis) | | Synonym |
Psilocarphus tenellus var. tenellus (Under Psilocarphus tenellus) | | Synonym |
Psilocarphus tenellus var. tenuis (Under Psilocarphus chilensis) | | Synonym |
Psilostrophe | PAPER-DAISY | |
Psilostrophe cooperi | | Native |
Psoralea bituminosa (Under Bituminaria bituminosa) | | Synonym |
Psoralea californica (Under Pediomelum californicum) | | Synonym |
Psoralea castorea (Under Pediomelum castoreum) | | Synonym |
Psoralea hallii var. media (Under Hoita macrostachya) | | Synonym |
Psoralea lanceolata (Under Ladeania lanceolata) | | Synonym |
Psoralea lanceolata subsp. scabra (Under Ladeania lanceolata) | | Synonym |
Psoralea orbicularis (Under Hoita orbicularis) | | Synonym |
Psoralea physodes (Under Rupertia physodes) | | Synonym |
Psoralea rigida (Under Rupertia rigida) | | Synonym |
Psoralea strobilina (Under Hoita strobilina) | | Synonym |
Psoralidium lanceolatum (Under Ladeania lanceolata) | | Synonym |
Psorodendron arborescens (Under Psorothamnus arborescens var. arborescens) | | Synonym |
Psorodendron fremontii (Under Psorothamnus fremontii var. fremontii) | | Synonym |
Psorodendron schottii (Under Psorothamnus schottii) | | Synonym |
Psorothamnus ↳ Key to Psorothamnus | INDIGO-BUSH | |
Psorothamnus arborescens | MOJAVE INDIGO-BUSH | Native |
Psorothamnus arborescens var. arborescens | | Native |
Psorothamnus arborescens var. minutifolius | | Native |
Psorothamnus arborescens var. simplicifolius | | Native |
Psorothamnus emoryi | | Native |
Psorothamnus fremontii | FREMONT'S DALEA | Native |
Psorothamnus fremontii var. attenuatus | NARROW-LEAVED PSOROTHAMNUS | Native |
Psorothamnus fremontii var. fremontii | | Native |
Psorothamnus polydenius | | Native |
Psorothamnus schottii | INDIGO-BUSH | Native |
Psorothamnus spinosus | SMOKE TREE | Native |
Ptelea | HOP TREE | |
Ptelea crenulata | | Native |
Pteridaceae ↳ Key to Pteridaceae | BRAKE FAMILY | |
Pteridium | BRACKEN, BRAKE | |
Pteridium aquilinum var. pubescens | | Native |
Pteris ↳ Key to Pteris | BRAKE | |
Pteris cretica | CRETAN BRAKE | Naturalized |
Pteris tremula | | Waif |
Pteris vittata | LADDER BRAKE | Naturalized |
Pterocarya | WINGNUT | |
Pterocarya stenoptera | CHINESE WINGNUT | Waif |
Pterospora | PINEDROPS | |
Pterospora andromedea | | Native |
Pterostegia | WOODLAND THREADSTEM | |
Pterostegia diphylla (Under Pterostegia drymarioides) | | Synonym |
Pterostegia diphylla var. biloba (Under Pterostegia drymarioides) | | Synonym |
Pterostegia drymarioides | | Native |
Pterostegia microphylla (Under Pterostegia drymarioides) | | Synonym |
Pteryxia petraea (Under Cymopterus terebinthinus var. petraeus) | | Synonym |
Pteryxia terebinthina var. californica (Under Cymopterus terebinthinus var. californicus) | | Synonym |
Ptilagrostis kingii (Under Stipa kingii) | | Synonym |
Puccinellia ↳ Key to Puccinellia | ALKALI GRASS | |
Puccinellia airoides (Under Puccinellia nuttalliana) | | Synonym |
Puccinellia californica (Under Torreyochloa pallida var. pauciflora) | | Synonym |
Puccinellia distans | EUROPEAN ALKALI GRASS | Naturalized |
Puccinellia erecta (Under Torreyochloa erecta) | | Synonym |
Puccinellia grandis (Under Puccinellia nutkaensis) | | Synonym |
Puccinellia howellii | HOWELL'S ALKALI GRASS | Native |
Puccinellia lemmonii | LEMMON'S ALKALI GRASS | Native |
Puccinellia nutkaensis | ALASKA ALKALI GRASS | Native |
Puccinellia nuttalliana | NUTTALL'S ALKALI GRASS | Native |
Puccinellia parishii | PARISH'S ALKALI GRASS | Native |
Puccinellia pauciflora (Under Torreyochloa pallida var. pauciflora) | | Synonym |
Puccinellia pumila | DWARF ALKALI GRASS | Native |
Puccinellia simplex | | Native |
Pugiopappus bigelovii (Under Leptosyne bigelovii) | | Synonym |
Pulicaria | FALSE-FLEABANE | |
Pulicaria hispanica (Under Pulicaria paludosa) | | Synonym |
Pulicaria paludosa | | Naturalized |
Punica | POMEGRANATE | |
Punica granatum | | Naturalized |
Purpusia saxosa (Under Ivesia arizonica var. arizonica) | | Synonym |
Purshia ↳ Key to Purshia | | |
Purshia glandulosa (Under Purshia tridentata var. glandulosa) | | Synonym |
Purshia mexicana var. stansburyana (Under Purshia stansburyana) | | Synonym |
Purshia stansburyana | CLIFFROSE | Native |
Purshia tridentata | BITTERBRUSH | Native |
Purshia tridentata var. glandulosa | | Native |
Purshia tridentata var. tridentata | | Native |
Pycnanthemum | | |
Pycnanthemum californicum | | Native |
Pyracantha ↳ Key to Pyracantha | | |
Pyracantha angustifolia | SLENDER or WOOLLY FIRETHORN | Naturalized |
Pyracantha atalantioides | SICHUAN FIRETHORN | Waif |
Pyracantha coccinea | FIRETHORN or SCARLET FIRETHORN | Waif |
Pyracantha crenatoserrata (Under Pyracantha fortuneana) | | Synonym |
Pyracantha crenulata | HIMALAYAN or NEPAL FIRETHORN | Waif |
Pyracantha fortuneana | CHINESE FIRETHORN | Naturalized |
Pyracantha koidzumii | TAIWAN FIRETHORN | Naturalized |
Pyracantha rogersiana (Under Pyracantha fortuneana) | | Synonym |
Pyrola ↳ Key to Pyrola | WINTERGREEN | |
Pyrola aphylla | LEAFLESS WINTERGREEN | Native |
Pyrola asarifolia | | Native |
Pyrola asarifolia subsp. asarifolia | BOG WINTERGREEN | Native |
Pyrola asarifolia subsp. bracteata | LONG-BRACTED WINTERGREEN | Native |
Pyrola asarifolia var. purpurea (Under Pyrola asarifolia subsp. asarifolia) | | Synonym |
Pyrola bracteata (Under Pyrola asarifolia subsp. bracteata) | | Synonym |
Pyrola californica (Under Pyrola asarifolia subsp. asarifolia) | | Synonym |
Pyrola crypta | CRYPTIC WINTERGREEN | Native |
Pyrola dentata | TOOTHED WINTERGREEN | Native |
Pyrola minor | LESSER WINTERGREEN | Native |
Pyrola pallida (Under Pyrola dentata) | | Synonym |
Pyrola picta | WHITE-VEINED WINTERGREEN | Native |
Pyrola picta f. aphylla (Under Pyrola aphylla) | | Synonym |
Pyrola picta subsp. dentata (Under Pyrola dentata) | | Synonym |
Pyrola picta subsp. integra (Under Pyrola dentata) | | Synonym |
Pyrola picta subsp. pallida (Under Pyrola dentata) | | Synonym |
Pyrola picta var. dentata (Under Pyrola dentata) | | Synonym |
Pyrola secunda (Under Orthilia secunda) | | Synonym |
Pyrrocoma ↳ Key to Pyrrocoma | | |
Pyrrocoma apargioides | ALPINE FLAMES | Native |
Pyrrocoma carthamoides var. cusickii | LARGE-FLOWERED GOLDENWEED | Native |
Pyrrocoma hirta | TACKY GOLDENWEED | Native |
Pyrrocoma hirta var. hirta | | Native |
Pyrrocoma hirta var. lanulosa | | Native |
Pyrrocoma lanceolata | LANCE-LEAVED GOLDENWEED | Native |
Pyrrocoma lanceolata var. lanceolata | | Native |
Pyrrocoma lanceolata var. subviscosa | | Native |
Pyrrocoma lanulosa (Under Pyrrocoma hirta var. lanulosa) | | Synonym |
Pyrrocoma lucida | STICKY PYRROCOMA | Native |
Pyrrocoma racemosa | CLUSTERED GOLDENWEED | Native |
Pyrrocoma racemosa var. congesta | DEL NORTE PYRROCOMA | Native |
Pyrrocoma racemosa var. paniculata | | Native |
Pyrrocoma racemosa var. pinetorum | PINE PYRROCOMA | Native |
Pyrrocoma racemosa var. racemosa | | Native |
Pyrrocoma racemosa var. sessiliflora | | Native |
Pyrrocoma uniflora | PLANTAIN GOLDENWEED | Native |
Pyrrocoma uniflora var. gossypina | BEAR VALLEY PYRROCOMA | Native |
Pyrrocoma uniflora var. uniflora | | Native |
Pyrus | PEAR | |
Pyrus communis | COMMON PEAR | Naturalized |
Pyrus malus (Under Malus pumila) | | Synonym |