Southern California Wildflowers
Common names O-P

Brackets [ ] indicate taxa not necessarily recognized by the Jepson Manual but which I think are deserving of separate listings because they are so very different. Names preceded by the word 'Common' in brackets such as [Common] Hawkweed are not necessarily the most common species of the genus, but simply do not have any other descriptive name. The use of the name [Common] in this context is solely for indexing purposes.

* Indicates introduced and naturalized species



Oak,
    Blue (Quercus douglasii)
    Brewer's (Quercus garryana var. breweri)
    California black (Quercus kelloggii)
    Canyon live (Quercus chrysolepis)
    Channel Island scrub (Quercus pacifica)
    Coast live (Quercus agrifolia var. agrifolia)
    Engelmann (Quercus engelmannii)
    Inland scrub (Quercus berberidifolia)
    Interior live (Quercus wislizeni var. wislizeni)
    Island (Quercus tomentella)
    Muller's (Quercus cornelius-mulleri)
    Oracle (Quercus Xmorehus)
    Palmer's (Quercus palmeri)
    San Gabriel Mountains leather (Quercus durata var. gabrielensis)
    Shrub live (Quercus turbinella)
    Shrubby interior live (Quercus wislizeni var. frutescens)
    Southern coast live (Quercus agrifolia var. oxyadenia)
    Tanbark (Notholithocarpus densiflorus)
    Torrey's scrub (Quercus acutidens)
    Tucker's (Quercus john-tuckeri)
    Valley (Quercus lobata)
Oak gooseberry (Ribes quercetorum)
Oak mistletoe (Phoradendron leucarpum ssp. tomentosum)
Oak violet (Viola purpurea ssp. quercetorum)
Oats,
    Common wild (Avena fatua)*
    Slender (Avena barbata)*
Ocotillo (Fouquieria splendens ssp. splendens)
Oenanthe, Pacific (Oenanthe sarmentosa)
Ojai fritillary (Fritillaria ojaiensis)
Ojai navarretia (Navarretia ojaiensis)
Oligomeris (Oligomeris linifolia)
Olive, Desert (Forestiera pubescens)
One-flowered fringed gentian (Gentianopsis simplex)
One-seeded pussypaws (Calyptridium monospermum)
One-sided bluegrass (Poa secunda ssp. secunda)
One-sided wintergreen (Orthilia secunda)
Onion,
    Burlew's (Allium burlewii)
    Crested (Allium atrorubens var. cristatum)
    Davis's pitted (Allium lacunosum var. davisiae)
    Early (Allium praecox)
    Fringed (Allium fimbriatum var. fimbriatum)
    Mt. Pinos (Allium howellii var. clokeyi)
    Narrow-leaved (Allium amplectens)
    Nevada (Allium nevadense)
    Parry's fringed (Allium parryi)
    Peninsular (Allium peninsulare var. peninsulare)
    Red-skinned (Allium haematochiton)
    San Bernardino mountain (Allium monticola)
    Sierra (Allium campanulatum)
Onionweed (Asphodelus fistulosus)*
Oracle oak (Quercus Xmorehus)
Orchard grass (Dactylis glomerata)*
Orchid,
    Alaska rein (Piperia unalascensis)
    Dense-flowered rein (Piperia elongata)
    Rein (Piperia cooperi)
    Royal rein (Piperia unalascensis)
    Stream (Epipactis gigantea)
    White-flowered bog (Platanthera dilatata var. leucostachys)
Orchid rock-rose (Cistus Xpurpureus)*
Orcutt's bird's beak (Dicranostegia orcuttiana)
Orcutt's brodiaea (Brodiaea orcuttii)
Orcutt's dudleya (Dudleya attenuata ssp. orcuttii)
Orcutt's woody-aster (Xylorhiza orcuttii)
Orcutt's yellow pincushion (Chaenactis glabriuscula var. orcuttiana)
Oregon cliff fern (Woodsia oregana)
Oregon willow-herb (Epilobium oregonense)
Oriental mustard (Sisymbrium orientale)*
Oso berry (Oemleria cerasiformis)
Otay manzanita (Arctostaphylos otayensis)
Otay Mesa mint (Pogogyne nudiuscula)
Otay tarplant (Deinandra conjugens)
Oval-leaved buckwheat (Eriogonum ovalifolium var. ovalifolium)
Owl's clover,
    Dense-flowered (Castilleja densiflora ssp. gracilis)
    Hairy (Castilleja tenuis)
    Mojave (Castilleja exserta ssp. venusta)
    Purple (Castilleja exserta ssp. exserta)
    San Bernardino Mountains (Castilleja lasiorhyncha)
Oxalis, Wild (Oxalis californica)
Ox-eye daisy (Leucanthemum vulgare)*
Oxytheca,
    Chickweed (Sidotheca caryophylloides)
    Cushenbury (Acanthoscyphus parishii var. goodmaniana)
    Parish's (Acanthoscyphus parishii var. parishii)
    Roundleaf (Oxytheca perfoliata)
    Threelobe (Sidotheca trilobata)
    Whitemargin (Sidotheca emarginata)
Oxytrope, Mountain (Oxytropis oreophila var. oreophila)
Pacific blazing star (Mentzelia obscura)
Pacific madrone (Arbutus menziesii)
Pacific mosquito fern (Azolla filiculoides)
Pacific ninebark (Physocarpus capitatus)
Pacific pickleweed (Salicornia pacifica)
Pacific rush (Juncus effusus ssp. pacificus)
Pacific saltbush (Atriplex pacifica)
Pacific sanicle (Sanicula crassicaulis)
Pacific wildrye (Elymus pacificus)
Paintbrush,
    Ashy-gray (Castilleja cinerea)
    Coast (Castilleja affinis ssp. affinis)
    Desert (Castilleja linariifolia)
    Desert indian (Castilleja chromosa)
    Dwarf alpine (Castilleja nana)
    Frosted indian (Castilleja gleasoni)
    Great red (Castilleja miniata)
    Heckard's indian (Castilleja montigena)
    Island (Castilleja hololeuca)
    Lesser indian (Castilleja minor ssp. spiralis)
    Longleaf indian (Castilleja subinclusa ssp. subinclusa)
    Martin's (Castilleja applegatei ssp. martinii)
    Soft-leaved indian (Castilleja mollis)
    Woolly indian (Castilleja foliolosa)
    Yellow (Castilleja plagiotoma)
Pale larkspur (Delphinium parishii ssp. pallidum)
Pale primrose (Camissoniopsis pallida ssp. pallida)
Pale yellow lupine (Lupinus luteolus)
Palmer beadpod (Physaria tenella)
Palmer's buckwheat (Eriogonum palmerianum)
Palmer's catchfly (Silene bernardina)
Palmer's ceanothus (Ceanothus palmeri)
Palmer's crinklemat (Tiquilia palmeri)
Palmer's frankenia (Frankenia palmeri)
Palmer's goldenbush (Ericameria palmeri var. pachylepis)
Palmer's grappling hook (Harpagonella palmeri)
Palmer's mariposa lily (Calochortus palmeri var. palmeri)
Palmer's milkvetch (Astragalus palmeri)
Palmer's monkeyflower (Mimulus palmeri)
Palmer's oak (Quercus palmeri)
Palmer's penstemon (Penstemon palmeri var. palmeri)
Palmer's sagewort (Artemisia palmeri)
Palmer's sun cup (Tetrapteron palmeri)
Palo verde
    [Common] (Parkinsonia florida)
    Littleleaf (Parkinsonia microphylla)
Pampasgrass (Cortaderia selloana)*
Panamint buckwheat (Eriogonum panamintense)
Panamint butterfly bush (Buddleja utahensis)
Panamint daisy (Enceliopsis covillei)
Panamint milkvetch (Astragalus panamintensis)
Panamint phacelia (Phacelia perityloides var. perityloides)
Panamint prince's plume (Stanleya elata)
Pancake prickly pear (Opuntia chlorotica)
Panicled bulrush (Scirpus microcarpus)
Panicled pyrrocoma (Pyrrocoma racemosa var. paniculata)
Paperbag bush (Scutellaria mexicana)
Paperflower (Psilostrophe cooperi)
Papillate dodder (Cuscuta californica var. papillosa)
Parish's bedstraw (Galium parishii)
Parish's bluecurls (Trichostema parishii)
Parish's broomrape (Orobanche parishii ssp. parishii)
Parish's buckwheat (Eriogonum parishii)
Parish's catchfly (Silene parishii)
Parish's fleabane (Erigeron parishii)
Parish's goldenbush (Ericameria parishii var. parishii)
Parish's goldeneye (Bahiopsis parishii)
Parish's Jacumba milkvetch (Astragalus douglasii var. parishii)
Parish's lomatium (Lomatium nevadense var. parishii)
Parish's lupine (Lupinus latifolius var. parishii)
Parish's meadowfoam (Limnanthes alba ssp. parishii)
Parish's milkvetch (Astragalus douglasii var. parishii)
Parish's monkeyflower (Mimulus parishii)
Parish's needlegrass (Stipa parishii)
Parish's nightshade (Solanum parishii)
Parish's oxytheca (Acanthoscyphus parishii var. parishii)
Parish's poppy (Eschscholzia parishii)
Parish's psoralea (Rupertia rigida)
Parish's rock-cress (Boechera parishii)
Parish's sagebrush (Artemisia tridentata ssp. parishii)
Parish's spurge (Euphorbia parishii)
Parish's tauschia (Tauschia parishii)
Parish's viguiera, see Parish's goldeneye
Parish's yampah,
    [Common] (Perideridia parishii ssp. parishii)
    Wide-leaved (Perideridia parishii ssp. latifolia)
Parry's buckwheat (Eriogonum brachypodum)
Parry's collinsia (Collinsia parryi)
Parry's fringed onion (Allium parryi)
Parry's green-gentian (Frasera parryi)
Parry's hulsea (Hulsea vestita ssp. parryi)
Parry's jepsonia (Jepsonia parryi)
Parry's linanthus (Linanthus parryae)
Parry's lip fern (Myriopteris parryi)
Parry's manzanita (Arctostaphylos parryana ssp. parryana)
Parry's marina (Marina parryi)
Parry's nolina (Nolina parryi)
Parry's phacelia (Phacelia parryi)
Parry's pussypaws (Calyptridium parryi var. parryi)
Parry's rabbitbrush (Ericameria parryi var. aspera)
Parry's spurge (Euphorbia parryi)
Parry's tetracoccus (Tetracoccus dioicus)
Parry's wild parsley (Lomatium parryi)
Parry's wirelettuce (Stephanomeria parryi)
Parsley,
    Desert (Lomatium mohavense)
    Parry's wild (Lomatium parryi)
Patagonia plantain (Plantago patagonica)
Payson's jewelflower (Caulanthus simulans)
Pea,
    Chaparral (Pickeringia montana var. montana)
    Desert rock (Lotus rigidus)
    Woolly chaparral (Pickeringia montana var. tomentosa)
Peach, Desert (Prunus andersonii)
Peak rush-rose (Helianthemum scoparium)
Pearlwort,
    Alpine (Sagina saginoides)
    Dwarf (Sagina apetala)*
    Western (Sagina decumbens ssp. occidentalis)
Pebble pincushion (Chaenactis carphoclinia var. carphoclinia)
Pectocarya,
    Bristly (Pectocarya setosa)
    Broad-fruited (Pectocarya platycarpa)
    Curvenut (Pectocarya recurvata)
    Hairy-leaved (Pectocarya heterocarpa)
    Slender (Pectocarya linearis ssp. ferocula)
    Winged (Pectocarya penicillata)
Pedicellate phacelia (Phacelia pedicellata)
Peirson's brown-eyed primrose (Chylismia claviformis ssp. peirsonii)
Peirson's lupine (Lupinus peirsonii)
Peirson's milkvetch (Astragalus magdalenae var. peirsonii)
Peirson's morning glory (Calystegia peirsonii)
Peirson's spring beauty (Claytonia peirsonii ssp. peirsonii)
Pellitory (Parietaria hespera var. hespera)
Pellitory, Pennsylvania (Parietaria pensylvanica)
Pencil cholla (Cylindropuntia ramosissima)
Peninsular manzanita (Arctostaphylos peninsularis)
Peninsular onion (Allium peninsulare var. peninsulare)
Peninsular spineflower (Chorizanthe leptotheca)
Pennsylvania pellitory (Parietaria pensylvanica)
Pennyroyal,
    California false (Hedeoma nanum ssp. californica)
    Desert (Monardella exilis)
    Rock (Monardella robisonii)
Penstemon,
    Beaked (Penstemon rostriflorus)
    Desert (Penstemon pseudospectabilis)
    Doubtful (Penstemon Xdubius)
    Firecracker (Penstemon eatonii var. undosus)
    Foothill (Penstemon heterophyllus var. heterophyllus)
    Gaping (Keckiella breviflora var. breviflora)
    Glandular showy (Penstemon spectabilis var. subviscosus)
    Grinnell's (Penstemon grinnellii var. grinnellii)
    Heartleaf (Keckiella cordifolia)
    Little-leaved yellow (Keckiella antirrhinoides var. microphylla)
    Mountain blue (Penstemon laetus var. laetus)
    Northern Grinnell's (Penstemon grinnellii var. scrophularioides)
    Palmer's (Penstemon palmeri var. palmeri)
    Royal (Penstemon speciosus)
    Smooth showy (Penstemon spectabilis var. spectabilis)
    Southern foothill (Penstemon heterophyllus var. australis)
    Thurber (Penstemon thurberi)
    Utah (Penstemon utahensis)
    Whorl-leaf (Keckiella ternata var. ternata)
    Yellow (Keckiella antirrhinoides var. antirrhinoides)
Pentachaeta,
    Golden-rayed (Pentachaeta aurea ssp. aurea)
    Lyon's (Pentachaeta lyonii)
    White-rayed pentachaeta (Pentachaeta aurea ssp. allenii)
Peony, Wild (Paeonia californica)
Pepper,
    Brazilian (Schinus terebinthifolius)*
    Peruvian (Schinus molle)*
Peppergrass,
    Hairy-podded (Lepidium lasiocarpum ssp. lasiocarpum)
    Mountain (Lepidium montanum)
    Perennial (Lepidium latifolium)*
    Shiny (Lepidium)
    Virginia (Lepidium virginicum ssp. virginicum)
    Wild (Lepidium virginicum ssp. menziesii)
    Yellow (Lepidium flavum)
Perennial chickweed (Cerastium fontanum ssp. vulgare)*
Perennial peppergrass (Lepidium latifolium)*
Perennial rock-cress (Boechera perennans)
Perennial sweet pea (Lathyrus latifolius)*
Periwinkle (Vinca major)*
Persian speedwell (Veronica persica)*
Peruvian pepper (Schinus molle)*
Petty spurge (Euphorbia peplus)*
Petunia, Seaside (Petunia parviflora)
Phacelia,
    Alkali (Phacelia neglecta)
    Aven Nelson's (Phacelia anelsonii)
    Branching (Phacelia ramosissima)
    Caltha-leaved (Phacelia calthifolia)
    Caterpillar (Phacelia cicutaria var. cicutaria)
    Caterpillar (Phacelia cicutaria var. hispida)
    Changeable (Phacelia mutabilis)
    Charlotte's (Phacelia nashiana)
    Cleftleaf wild heliotrope (Phacelia crenulata var. crenulata)
    Common (Phacelia distans)
    Congdon's (Phacelia congdonii)
    Curved-stem (Phacelia curvipes)
    Davidson's (Phacelia davidsonii)
    Death Valley (Phacelia vallis-mortae)
    Douglas (Phacelia douglasii)
    Fremont's (Phacelia fremontii)
    Great valley (Phacelia ciliata)
    Hiddenflower phacelia (Phacelia cryptantha)
    Hubby's caterpillar (Phacelia hubbyi)
    Imbricate (Phacelia imbricata var. patula)
    Ives' (Phacelia ivesiana)
    Large-flowered (Phacelia grandiflora)
    Lemmon's (Phacelia lemmonii)
    Limestone (Phacelia affinis)
    Longstalk (Phacelia longipes)
    Low (Phacelia humilis var. dudleyi)
    Mojave (Phacelia mohavensis)
    Mountain (Phacelia imbricata var. imbricata)
    Northern Channel Islands (Phacelia insularis var. insularis)
    Notchleaf (Phacelia crenulata var. ambigua)
    Panamint (Phacelia perityloides var. perityloides)
    Parry's (Phacelia parryi)
    Rock (Phacelia egena)
    Round-leaved (Phacelia rotundifolia)
    Smallflower notchleaf (Phacelia crenulata var. minutiflora)
    Southern mountain (Phacelia austromontana)
    Sticky (Phacelia viscida)
    Tansy (Phacelia tanacetifolia)
    Thick-leaved (Phacelia pachyphylla)
    Timberline (Phacelia hastata var. hastata)
    Two-color (Phacelia bicolor)
    Yellow-throated (Phacelia brachyloba)
Phlox,
    Big Bear Valley (Phlox dolichantha)
    Common slender (Microsteris gracilis)
    Condensed (Phlox condensata)
    Southern mountain (Phlox austromontana)
    Spreading (Phlox diffusa)
    Stansbury (Phlox stansburyi ssp. stansburyi)
Phlox-leaved bedstraw (Galium andrewsii ssp. intermedium)
Pickleweed, Pacific (Salicornia pacifica)
Pigweed amaranth (Amaranthus albus)*
Pincushion,
    Desert (Chaenactis stevioides)
    Fremont's (Chaenactis fremontii)
    Large-flowered (Chaenactis macrantha)
    Orcutt's yellow (Chaenactis glabriuscula var. orcuttiana)
    Pebble (Chaenactis carphoclinia var. carphoclinia)
    Santolina (Chaenactis santolinoides)
    White (Chaenactis artemisiifolia)
    Xantus (Chaenactis xantiana)
    Yellow (Chaenactis glabriuscula var. glabriuscula)
Pine,
    Aleppo (Pinus halapensis)*
    Bishop (Pinus muricata)
    Bristlecone (Pinus longaeva)
    Coulter (Pinus coulteri)
    Four-needle pinyon (Pinus quadrifolia)
    Gray (Pinus sabiniana)
    Jeffrey (Pinus jeffreyi)
    Knobcone (Pinus attenuata)
    Limber (Pinus flexilis)
    Lodgepole (Pinus contorta ssp. murrayana)
    Singleleaf pinyon (Pinus monophylla)
    Sugar (Pinus lambertiana)
    Torrey (Pinus torreyana ssp. torreyana)
    Yellow (Pinus ponderosa var. pacifica)
Pineapple cactus (Sclerocactus johnsonii)
Pineapple weed (Matricaria discoidea)*
Pinedrops (Pterospora andromedea)
Pine dwarf mistletoe (Arceuthobium campylopodum)
Pine goldenbush (Ericameria pinifolia)
Pine green-gentian (Frasera neglecta)
Pinegrove groundsmoke (Gayophytum oligospermum)
Pineland buckwheat (Eriogonum molestum)
Pine lousewort (Pedicularis semibarbata)
Pine rock-cress (Boechera retrofracta X)
Pine violet (Viola pinetorum ssp. pinetorum)
Pinewoods cryptantha (Cryptantha simulans)
Pinewoods fritillary (Fritillaria pinetorum)
Pink,
    California (Silene laciniata ssp. californica)
    Ground (Linanthus dianthiflorus)
    Mexican (Silene laciniata ssp. laciniata)
    Windmill (Silene gallica)*
Pink alumroot (Heuchera rubescens)
Pink cudweed (Pseudognaphalium ramosissimum)
Pink fairy duster (Calliandra eriophylla)
Pink funnel lily (Muilla coronata)
Pink rock-rose (Cistus incanus)*
Pink sand verbena (Abronia umbellata var. umbellata)
Pink spineflower (Chorizanthe membranacea)
Pink velvet-mallow (Horsfordia alata)
Pink-bracted manzanita (Arctostaphylos pringlei ssp. drupacea)
Pink-flowered bush mallow (Malacothamnus marrubioides)
Pin-point clover (Trifolium gracilentum)
Pinz's fleabane (Erigeron clokeyi var. pinzliae)
Pipestems (Clematis lasiantha)
Pipestems achenes (Clematis lasiantha)
Pipsissewa (Chimaphila umbellata)
Pitch trefoil (Bituminaria bituminosa)*
Pitcher sage,
    Crimson (Salvia spathacea)
    Fragrant (Lepechinia fragrans)
    Heartleaf (Lepechinia cardiophylla)
Pitseed goosefoot (Chenopodium berlandieri)
Plain mariposa lily (Calochortus invenustus)
Plain mariposa lily (blue form) (Calochortus invenustus)
Plains flax (Linum puberulum)
Plantain,
    Broad-leaf (Plantago major)
    California (Plantago erecta)
    Cut-leaf (Plantago coronopus)*
    English (Plantago lanceolata)*
    Longleaf (Plantago elongata)
    Patagonia (Plantago patagonica)
    Sand (Plantago arenaria)*
    Water (Alisma triviale)
    Woolly (Plantago ovata)
Playa milkvetch (Astragalus allochrous var. playanus)
Plectritis, Long-spurred (Plectritis ciliosa)
Plume acacia (Albizia lophantha)*
Plummer's baccharis (Baccharis plummerae ssp. plummerae)
Plummer's mariposa lily (Calochortus plummerae)
Poison hemlock (Conium maculatum)*
Poison oak, Western (Toxicodendron diversilobum)
Poison sanicle (Sanicula bipinnata)
Pokeweed (Phytolacca americana)*
Polished blazing star (Mentzelia polita)
Polypody,
    California (Polypodium californicum)
    Western (Polypodium hesperium)
Pomona locoweed (Astragalus pomonensis)
Pondweed, Diverse-leaved (Potamogeton diversifolius)
Poodle-dog bush (Eriodictyon parryi)
Poor man's timothy (Iva hayesiana)
Popcorn flower,
    Adobe (Plagiobothrys acanthocarpus)
    Arizona (Plagiobothrys arizonicus)
    California (Plagiobothrys collinus var. fulvescens)
    Harsh (Plagiobothrys hispidulus)
    Hooked (Plagiobothrys undulatus)
    Mojave (Plagiobothrys jonesii)
    Rusty-haired (Plagiobothrys nothofulvus)
    Slender (Plagiobothrys tenellus)
    Tawny (Plagiobothrys fulvus var. campestris)
    Valley (Plagiobothrys canescens var. canescens)
Poppy,
    Bush (Dendromecon rigida)
    California (Eschscholzia californica)
    Channel Island tree (Dendromecon harfordii)
    Desert gold (Eschscholzia glyptosperma)
    Fire (Papaver californicum)
    Little gold (Eschscholzia minutiflora)
    Matilija (Romneya coulteri)
    Mojave prickly (Argemone corymbosa)
    Parish's (Eschscholzia parishii)
    Pygmy (Canbya candida)
    Tejon (Eschscholzia lemmonii ssp. kernensis)
    Tufted (Eschscholzia caespitosa)
    Wind (Papaver heterophyllum)
Poreleaf, Slender (Porophyllum gracile)
Portuguese broom (Cytisus striatus)*
Portulaca, Desert (Portulaca halimoides)
Poverty weed,
    [Common] (Iva axillaris)
    Nuttall's (Monolepis nuttalliana)
Prickleleaf, Shockley's (Hecastocleis shockleyi)
Pricklepoppy, Mojave (Argemone corymbosa)
Prickly lettuce (Lactuca serriola)*
Prickly-nut cryptantha (Cryptantha muricata var. denticulata)
Prickly-pear,
    Chaparral (Opuntia oricola)
    Coast (Opuntia littoralis)
    Desert (Opuntia phaeacantha)
    Mojave (Opuntia polyacantha var. erinacea)
    Pancake (Opuntia chlorotica)
    Vasey's (Opuntia Xvaseyi)
    Western (Opuntia occidentalis)
Prickly phlox,
    [Common] (Linanthus californicus)
    Mountain (Linanthus pungens)
    San Jacinto (Linanthus jaegeri)
Prickly sow-thistle (Sonchus asper ssp. asper)*
Pride of the mountains (Penstemon newberryi var. newberryi)
Primrose,
    Beach (Camissonia cheiranthifolia ssp. suffruticosa)
    California evening (Oenothera californica ssp. californica)
    Channel Islands beach (Camissonia cheiranthifolia ssp. cheiranthifolia)
    Death Valley brown-eyed (Camissonia claviformis ssp. funerea)
    Desert evening (Oenothera californica ssp. avita)
    Dune (Oenothera deltoides ssp. deltoides)
    Eureka Dunes evening (Oenothera californica ssp. eurekensis)
    Hairy evening (Oenothera elata ssp. hirsutissima)
    Hooker's evening (Oenothera elata ssp. hookeri)
    Large yellow (Oenothera primiveris ssp. bufonis)
    Mojave brown-eyed (Camissonia claviformis ssp. claviformis)
    Mustard evening (Camissonia californica)
    Pale (Camissoniopsis pallida ssp. pallida)
    Peirson's brown-eyed (Camissonia claviformis ssp. peirsonii)
    Rose evening (Oenothera rosea)*
    Small evening (Camissonia micrantha)
    Spike (Epilobium densiflorum)
    Tufted evening (Oenothera caespitosa ssp. marginata)
Primrose monkeyflower (Mimulus primuloides var. primuloides)
Prince's pine, Little (Chimaphila menziesii)
Prince's plume,
    [Common] (Stanleya pinnata var. pinnata)
    Panamint (Stanleya elata)
Pringle's woolly sunflower (Eriophyllum pringlei)
Prostrate amaranth (Amaranthus blitoides)
Prostrate coast goldenbush (Isocoma menziesii var. sedoides)
Prostrate hutchinsia (Hornungia procumbens)
Prostrate navarretia (Navarretia prostrata)
Prostrate spineflower (Chorizanthe procumbens)
Prostrate spurge (Euphorbia prostrata)*
Providence Mountains milkvetch (Astragalus nutans)
Prunus, Desert (Prunus eremophila)
Psoralea, Parish's (Rupertia rigida)
Puff-calyx gilia (Gilia aliquanta ssp. aliquanta)
Pulicaria (Pulicaria paludosa)*
Pullup muhly (Muhlenbergia filiformis)
Puncture vine (Tribulus terrestris)*
Purple bird's beak (Cordylanthus parviflorus)
Purple clarkia (Clarkia purpurea ssp. quadrivulnera)
Purple cudweed (Gamochaeta ustulata)
Purple false-brome (Brachypodium distachyon)*
Purple false-gilia (Allophyllum divaricatum)
Purple mat (Nama demissa var. demissa)
Purple Mexican bush sage (Salvia leucantha cv. "Midnight")
Purple monkeyflower (Mimulus purpureus)
Purple needlegrass (Stipa pulchra)
Purple nightshade (Solanum xanti)
Purple owl's clover (Castilleja exserta ssp. exserta)
Purple reedgrass (Calamagrostis purpurascens)
Purple sage (Salvia leucophylla)
Purple sanicle (Sanicula bipinnatifida)
Purple salsify (Tragopogon porrifolius)*
Purpus's gilia (Gilia leptantha ssp. purpusii)
Pursh's milkvetch (Astragalus purshii var. lectulus)
Purslane,
    [Common] (Portulaca oleracea)*
    Lowland (Trianthema portulacastrum)
Purslane speedwell (Veronica peregrina ssp. xalapensis)
Pussypaws,
    [Common] (Calyptridium umbellatum)
    One-seeded (Calyptridium monospermum)
    Parry's (Calyptridium parryi var. parryi)
    Pygmy (Calyptridium pygmaeum)
Pussytoes,
    Alpine (Antennaria media)
    Low (Antennaria dimorpha)
    Rosy (Antennaria rosea ssp. confinis)
Pygmy hulsea (Hulsea vestita ssp. pygmaea)
Pygmy linanthus (Leptosiphon pygmaeus ssp. continentalis)
Pygmy lotus (Acmispon haydonii)
Pygmy madia (Hemizonella minima)
Pygmy poppy (Canbya candida)
Pygmy pussypaws (Calyptridium pygmaeum)
Pygmyweed
   Australian (Crassula colligata ssp. lamprosperma)*
    [Common] (Crassula connata)
    Water (Crassula aquatica)
Pygmy-flower rockjasmine (Androsace septentrionalis)
Pygmyleaf, Spreading (Loeflingia squarrosa)
Pyrrocoma,
    Bear Valley (Pyrrocoma uniflora var. gossypina)
    Panicled (Pyrrocoma racemosa var. paniculata)

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