Southern California Wildflowers
Latin 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.

* Indicates introduced and naturalized species



Oemleria cerasiformis (Oso berry)
Oenanthe sarmentosa (Water-parsley)
Oenothera
    californica ssp. avita
(Desert evening primrose)
    californica ssp. californica
(California evening primrose)
    californica ssp. eurekensis (Eureka Dunes evening primrose)
    cavernae
(Cave evening primrose)
    cespitosa ssp. marginata (Tufted evening primrose)
    deltoides ssp. deltoides
(Dune primrose)
    elata ssp. hirsutissima (Hairy evening primrose)
    elata ssp. hookeri (Hooker's evening primrose)
    primiveris ssp. bufonis (Large yellow primrose)
    rosea (Rose evening primrose)*
    sinuosa (Wavyleaf bee blossom)*
    suffrutescens (Scarlet gaura)

Oligomeris linifolia (Oligomeris)
Olneya tesota
(Desert ironwood)
Oncosiphon piluliferum
(Globe chamomile)*
Ophioglossum californicum
(California adder's-tongue)
Opuntia
    acanthocarpa var. coloradensis, see Cylindropuntia acanthocarpa var. coloradensis
    basilaris var. basilaris
(Beavertail cactus)
    basilaris var. brachyclada (Short-joint beavertail cactus)
    basilaris var. treleasei (Bakersfield cactus)
    bigelovii, see Cylindropuntia bigelovii
    chlorotica (Pancake prickly-pear)
    echinocarpa, see Cylindropuntia echinocarpa
    erinacea var. erinacea, see Opuntia polyacantha var. erinacea
    ficus-indica (Mission cactus)*
    fosburgii, see Cylindropuntia fosburgii
    littoralis
(Coast prickly-pear)
    occidentalis (Western prickly-pear)
    oricola
(Chaparral prickly-pear)
    parishii, see Grusonia parishii

    parryi var. parryi, see Cylindropuntia californica var. parkeri
    phaeacantha (Desert prickly-pear)
    polyacantha var. erinacea (Mojave prickly-pear)
    prolifera, see Cylindropuntia prolifera
    ramosissima, see Cylindropuntia ramosissima

    Xvaseyi (Vasey's prickly-pear)
    wolfii, see Cylindropuntia wolfii

Oreonana vestita
(Woolly mountain parsley)
Oreostemma alpigenum var. andersonii (Alpine aster)
Ornithostaphylos oppositifolia (Baja birdbush)
Orobanche
    bulbosa
(Chaparral broomrape)
    californica ssp. feudgei
(California broomrape)
    cooperi (Cooper's broomrape)
    corymbosa (Flat-topped broomrape)
    fasciculata
(Clustered broomrape)
    parishii ssp. brachyloba (Short-lobed broomrape)
    parishii ssp. parishii (Parish's broomrape)
    uniflora (Naked broomrape)
    valida ssp. valida (Rock Creek broomrape)
    vallicola (Valley broomrape)
Orthilia secunda (One-sided wintergreen)
Osmadenia tenella (Three-spot)
Osmorhiza
    berteroi
(Mountain sweet-cicely)
    brachypoda
(Sweet-cicely)
    chilensis, see Osmorhiza berteroi
Osteospermum ecklonis, see Dimorphotheca ecklonis

Oxalis
    albicans ssp. californica, see Oxalis californica
    albicans ssp. pilosa, see Oxalis pilosa
    californica
(California oxalis)
    corniculata (Creeping wood-sorrel)*
    pes-caprae (Bermuda buttercup)*
    pilosa
(Wild oxalis)
Oxypolis occidentalis
(Western cowbane)
Oxystylis lutea
(False-clover)
Oxytheca
    caryophylloides, see Sidotheca caryophylloides
    emarginata, see Sidotheca emarginata
    parishii var. cienegensis, see Acanthoscyphus parishii var. cienegensis
    parishii var. goodmaniana, see Acanthoscyphus parishii var. goodmaniana
    parishii var. parishii, see Acanthoscyphus parishii var. parishii
    perfoliata
(Roundleaf oxytheca)
    trilobata, see Sidotheca trilobata

Oxytropis oreophila var. oreophila (Mountain oxytrope)
Packera
    bernardina
(San Bernardino ragwort)
    ionophylla
(Tehachapi ragwort)
    multilobata
(Basin butterweed)

Paeonia californica
(Wild peony)
Palafoxia
    arida var. arida
(Spanish needles)
    arida var. gigantea (Giant Spanish needles)
Panicum urvilleanum (Desert panic grass)
Papaver
    californicum
(Fire poppy)
    heterophyllum (Wind poppy)
Parapholis incurva (Curved sicklegrass)*
Parietaria
    hespera var. hespera
(Pellitory)
    pensylvanica
(Pennsylvania pellitory)

Parkinsonia
    florida
(Palo verde)
    microphylla (Littleleaf palo verde)
Parnassia
    californica, see Parnassia palustris
    palustris
(Grass-of-parnassus)
Paspalum
    dilatatum
(Dallis grass)*
    distichum
(Knot grass)
Pectis papposa var. papposa
(Chinchweed)
Pectocarya
    heterocarpa
(Hairy-leaved pectocarya)
    linearis ssp. ferocula
(Slender pectocarya)
    penicillata (Winged pectocarya)
    platycarpa (Broad-fruited pectocarya)
    recurvata
(Curvenut pectocarya)
    setosa
(Bristly pectocarya)
Pedicularis
    attollens
(Little elephant heads)
    densiflora
(Indian warrior)
    semibarbata (Pine lousewort)
Pediomelum californicum
(Indian breadroot)
Pellaea
    andromedifolia
(Coffee fern)
    breweri (Brewer's cliffbrake)
    mucronata var. californica (California cliff brake)
    mucronata var. mucronata
(Bird's-foot fern)
    truncata (Cliff brake)
Pennisetum
    clandestinum
(Kikuyu grass)*
    setaceum
(Fountaingrass)*
Penstemon
    caesius
(San Bernardino beardtongue)
    calcareus (Limestone beardtongue)
    californicus (California beardtongue)

    centranthifolius
(Scarlet bugler)
    clevelandii var. clevelandii (Cleveland's beardtongue)
    clevelandii var. connatus (San Jacinto beardtongue)
    clevelandii var. mohavensis (Mojave beardtongue)
    Xdubius (Doubtful penstemon)
    eatonii var. undosus (Firecracker penstemon)
    floridus var. austinii
(Austin's beardtongue)
    fruticiformis var. fruticiformis (Desert beardtongue)
    grinnellii var. grinnellii
(Grinnell's penstemon)
    grinnellii var. scrophularioides (Northern Grinnell's penstemon)
    heterophyllus var. australis (Southern foothill penstemon)
    heterophyllus var. heterophyllus (Foothill penstemon)
    labrosus (San Gabriel beardtongue)
    labrosus (yellow form) (San Gabriel beardtongue)
    laetus var. laetus
(Mountain blue penstemon)
    newberryi var. newberryi
(Pride of the mountains)
    palmeri var. palmeri
(Palmer's penstemon)
    pseudospectabilis (Desert penstemon)
    rostriflorus
(Beaked penstemon)
    speciosus (Royal penstemon)
    spectabilis var. spectabilis (Smooth showy penstemon)
    spectabilis var. subviscosus
(Glandular showy penstemon)

    stephensii (Stephens' beardtongue)
    thompsoniae (Thompson's beardtongue)
    thurberi (Thurber penstemon)
    utahensis
(Utah penstemon)
Pentachaeta
    aurea ssp. allenii
(Allen's daisy)
    aurea ssp. aurea
(Golden-rayed pentachaeta)
    lyonii
(Lyon's pentachaeta)
Pentagramma
    rebmanii
(Rebman's silverback fern)
    triangularis ssp. maxonii
(Maxon's goldback fern)
    triangularis ssp. triangularis
(Goldback fern)
    triangularis ssp. viscosa (Sticky goldback fern)

Pericome caudata (Mountain tail leaf)
Perideridia
    parishii ssp. latifolia
(Wide-leaved Parish's yampah)
    parishii ssp. parishii
(Parish's yampah)
    pringlei (Adobe yampah)

Peritoma
    arborea var. arborea
(Bladderpod)

    arborea var. globosa (Round-fruited bladderpod)
Perityle
    emoryi
(Rock daisy)
    megalocephala var. megalocephala (Nevada rock daisy)
Persicaria
    amphibia
(Swamp knotweed)
    capitata (Himalayan smartweed)*
    hydropiper (Water pepper)
    lapathifolia (Willow smartweed)
    punctata (Water smartweed)

Petalonyx
    nitidus
(Shinyleaf sandpaper plant)
    thurberi ssp. thurberi
(Sandpaper plant)

Petrophytum caespitosum ssp. caespitosum (Rock spiraea)
Petrorhagia dubia (Hairypink)*
Petunia parviflora
(Seaside petunia)
Peucephyllum schottii
(Desert-fir)
Phacelia
    affinis
(Limestone phacelia)
    anelsonii
(Aven Nelson's phacelia)
    austromontana
(Southern mountain phacelia)
    bicolor (Two-color phacelia)
    brachyloba
(Yellow-throated phacelia)
    calthifolia (Caltha-leaved phacelia)
    campanularia ssp. campanularia (Desert bluebells)
    campanularia ssp. vasiformis (Funnel bluebells)
    cicutaria var. cicutaria (Caterpillar phacelia)
    cicutaria var. hispida (Caterpillar phacelia)
    cicutaria var. hubbyi, see Phacelia hubbyi
    ciliata (Great valley phacelia)
    congdonii (Congdon's phacelia)
    crenulata var. ambigua (Notch-leaf phacelia)
    crenulata var. crenulata (Cleftleaf wild heliotrope)
    crenulata var. minutiflora (Smallflower notchleaf phacelia)
    cryptantha (Hiddenflower phacelia)

    curvipes (Curved-stem phacelia)
    davidsonii (Davidson's phacelia)
    distans (Common phacelia)
    douglasii (Douglas phacelia)
    egena (Rock phacelia)
    exilis
(Lavender windows)
    fremontii (Fremont's phacelia)
    grandiflora (Large-flowered phacelia)
    hastata var. hastata (Timberline phacelia)
    hubbyi
(Hubby's caterpillar phacelia)
    humilis var. dudleyi
(Low phacelia)
    imbricata ssp. imbricata (Mountain phacelia)
    imbricata ssp. patula (Imbricate phacelia)
    insularis var. insularis
(Northern Channel Islands phacelia)
    ivesiana
(Ives' phacelia)
    lemmonii (Lemmon's phacelia)
    longipes (Longstalk phacelia)
    minor (Canterbury bells)
    mohavensis (Mojave phacelia)
    mutabilis (Changeable phacelia)
    nashiana (Charlotte's phacelia)
    neglecta
(Alkali phacelia)
    pachyphylla
(Thick-leaved phacelia)
    parryi (Parry's phacelia)
    pedicellata (Pedicellate phacelia)
    perityloides var. perityloides (Panamint phacelia)
    ramosissima (Branching phacelia)
    rotundifolia (Round-leaved phacelia)
    tanacetifolia
(Tansy phacelia)
    vallis-mortae (Death Valley phacelia)
    viscida
(Sticky phacelia)
Phalaris aquatica (Harding grass)*
Philadelphus microphyllus
(Little-leaved mock orange)
Phleum alpinum
(Mountain timothy)
Phlox
    austromontana
(Southern mountain phlox)
    condensata (Condensed phlox)
    diffusa
(Spreading phlox)
    dolichantha (Big Bear Valley phlox)
    gracilis, see Microsteris gracilis
    stansburyi ssp. stansburyi (Stansbury phlox)
Pholisma
    arenarium
(Scaly-stemmed sand plant)
    sonorae
(Sand food)
Pholistoma
    auritum var. auritum (Fiesta flower)
    membranaceum (White fiesta flower)
Phoradendron
    bolleanum (Bolle's mistletoe)
    californicum
(Desert mistletoe)
    densum, see Phoradendron bolleanum
    juniperinum (Juniper mistletoe)
    leucarpum ssp. macrophyllum (Big-leaf mistletoe)
    leucarpum ssp. tomentosum (Oak mistletoe)
    libocedri, see Phoradendron juniperinum
    macrophyllum, see Phoradendron serotinum ssp. macrophyllum
    pauciflorum, see Phoradendron bolleanum

    serotinum ssp. macrophyllum, see P. leucarpum ssp. macrophyllum
    serotinum ssp. tomentosum, see P. leucarpum ssp. tomentosum

    villosum, see Phoradendron serotinum ssp. tomentosum
Phragmites australis (Common reed)
Phyllodoce breweri (Mountain heather)
Physalis
    crassifolia
(Thick-leaved ground-cherry)
    hederifolia var. fendleri (Fendler's ground-cherry)
    lobata (Lobed ground-cherry)
Physaria
    kingii ssp. bernardina
(San Bernardino Mountains bladderpod)

    kingii ssp. kingii (King's bladderpod)
    tenella (Palmer beadpod)
Physocarpus
    alternans
(Nevada ninebark)
    capitatus
(Pacific ninebark)

Phytolacca americana (Pokeweed)*
Pickeringia
    montana var. montana
(Chaparral pea)
    montana var. tomentosa (Woolly chaparral pea)
Picris echioides, see Helminthotheca echioides
Picradeniopsis multiflora
(Many-flowered bahia)
Pilostyles thurberi
(Thurber's stemsucker)
Pinus
    attenuata
(Knobcone pine)
    contorta ssp. murrayana (Lodgepole pine)
    coulteri (Coulter pine)
    flexilis (Limber pine)
    halepensis
(Aleppo pine)*
    jeffreyi
(Jeffrey pine)
    lambertiana (Sugar pine)
    longaeva (Bristlecone pine)
    monophylla (Singleleaf pinyon pine)
    muricata (Bishop pine)
    ponderosa var. pacifica
(Yellow pine)
    quadrifolia (Four-needle pinyon pine)
    sabiniana
(Gray pine)
    torreyana ssp. insularis
(Santa Rosa Island torrey pine)
    torreyana ssp. torreyana
(Torrey pine)
Piperia
    cooperi
(Rein orchid)
    elongata (Dense-flowered rein orchid)
    transversa (Royal rein orchid)
    unalascensis
(Alaska rein orchid)
Piptatherum miliaceum, see Stipa miliacea
Plagiobothrys
    acanthocarpus
(Adobe popcorn flower)
    arizonicus
(Arizona popcorn flower)
    canescens var. canescens (Valley popcorn flower)
    collinus var. fulvescens (California popcorn flower)
    fulvus var. campestris (Tawny popcorn flower)
    hispidulus (Harsh popcorn flower)
    jonesii (Mojave popcorn flower)
    nothofulvus (Rusty-haired popcorn flower)
    tenellus (Slender popcorn flower)
    undulatus (Hooked popcorn flower)
Plantago
    arenaria
(Sand plantain)*
    coronopus
(Cut-leaf plantain)*
    elongata (Longleaf plantain)

    erecta
(California plantain)
    lanceolata (English plantain)*
    major (Broad-leaf plantain)*
    ovata
(Woolly plantain)
    patagonica (Patagonia plantain)
Platanthera
    dilatata var. leucostachys (White-flowered bog orchid)
    leucostachys, see Platanthera dilatata var. leucostachys
    sparsiflora (Sparse-flowered bog orchid)
Platanus racemosa (Western sycamore)
Platystemon californicus (Cream cups)
Plectritis ciliosa (Long-spurred plectritis)
Pleiacanthus spinosus
(Thorny skeleton-plant)
Pleuraphis rigida, see Hilaria rigida

Pleurocoronis pluriseta
(Arrowleaf)
Pluchea
    odorata var. odorata
(Salt marsh fleabane)
    sericea (Arrow weed)
Poa
    atropurpurea
(San Bernardino bluegrass)
    bulbosa ssp. vivipara
(Bulbous bluegrass)*
    douglasii
(Sand-dune bluegrass)
    fendleriana ssp. longiligula
(Fendler's bluegrass)
    infirma (Weak bluegrass)*
    pratensis ssp. pratensis (Kentucky bluegrass)*
    secunda ssp. juncifolia (Rush bluegrass)
    secunda ssp. secunda (One-sided bluegrass)
Pogogyne nudiuscula (Otay Mesa mint)
Polemonium occidentale ssp. occidentale
(Western sky pilot)
Polycarpon tetraphyllum var. tetraphyllum
(Four-leaf allseed)*
Polygala
    acanthoclada
(Desert polygala)
    cornuta var. fishiae
(Fish's milkwort)

Polygonum
    amphibium var. emersum, see Persicaria amphibia

    arenastrum, see Polygonum aviculare ssp. depressum
    aviculare ssp. depressum (Common knotweed)*
    bistortoides, see Bistorta bistortoides
    capitatum, see Persicaria capitata
    douglasii (Douglas's knotweed)
    douglasii ssp. johnstonii, see Polygonum sawatchense ssp. sawatchense
    lapathifolium, see Persicaria lapathifolia
    polygaloides ssp. kelloggii
(Kellogg's knotweed)
    punctatum, see Persicaria punctata
    sawatchense ssp. sawatchense (Sawatch knotweed)

Polypodium
    californicum
(California polypody)
    hesperium (Western polypody)

Polypogon
    interruptus (Ditch beard grass)*
    monspeliensis (Rabbitsfoot grass)*
    viridis (Green bentgrass)*
Polystichum
    imbricans ssp. curtum
(Cliff sword fern)
    munitum
(Western sword fern)
   scopulinum
(Mountain holly fern)
Populus
    balsamifera ssp. trichocarpa, see Populus trichocarpa
    fremontii ssp. fremontii
(Fremont's cottonwood)
    tremuloides
(Quaking aspen)
    trichocarpa
(Black cottonwood)

Porophyllum gracile (Slender poreleaf)
Portulaca
    halimoides
(Desert portulaca)
    oleracea
(Purslane)*
Potamogeton diversifolius
(Diverse-leaved pondweed)
Potentilla
    anserina ssp. anserina
(Silverleaf cinquefoil)
    anserina ssp. pacifica (Silverweed)
    biennis (Biennial cinquefoil)
    glandulosa ssp. ewanii, see Drymocallis cuneifolia var. ewanii
    glandulosa ssp. glandulosa in part, see Drymocallis glandulosa var. glandulosa
(TR, PR)
    glandulosa ssp. glandulosa in part, see Drymocallis glandulosa var. wrangelliana
(SoCO)
    glandulosa ssp. nevadensis, see Drymocallis lactea var. lactea
    glandulosa ssp. reflexa in part, see Drymocallis glandulosa var. reflexa
(TR, PR)
    glandulosa ssp. reflexa in part, see Drymocallis glandulosa var. viscida
(TR, PR)
    gracilis var. elmeri (Elmer's cinquefoil)
    gracilis var. fastigiata (Slender cinquefoil)
    norvegica (Norwegian cinquefoil)*
    wheeleri (Wheeler's cinquefoil)
Prenanthella exigua (Bright white)
Primula
    clevelandii ssp. clevelandii
(Shooting star)
    clevelandii ssp. insularis (Island shooting star)
    fragrans (Fragrant shooting star)
    hendersonii (Foothill shooting star)

    tetrandra (Alpine shooting star)
Proboscidea althaeifolia (Desert unicorn-plant)
Prosopis
    glandulosa var. torreyana
(Honey mesquite)
    pubescens (Screwbean mesquite)
Prunella vulgaris var. lanceolata (Self-heal)
Prunus
    andersonii
(Desert peach)
    emarginata
(Bitter cherry)
    eremophila (Mojave desert plum)
    fasciculata var. fasciculata
(Desert almond)
    fremontii (Desert apricot)
    ilicifolia ssp. ilicifolia (Hollyleaf cherry)
    ilicifolia ssp. lyonii (Catalina cherry)
    virginiana var. demissus
(Western chokecherry)
Psathyrotes
    annua
(Fan leaf)
    ramosissima (Turtleback)
Pseudobahia peirsonii (San Joaquin adobe sunburst)
Pseudognaphalium
    beneolens
(Fragrant everlasting)
    biolettii
(Two-tone everlasting)
    californicum (California everlasting)
    canescens (Wright's cudweed)
    luteoalbum (Weedy cudweed)*

    microcephalum (Feltleaf everlasting)
    ramosissimum (Pink cudweed)
    stramineum (Cotton-batting plant)
    thermale (Slender everlasting)
Pseudostellaria jamesiana (Sticky starwort)
Pseudotsuga macrocarpa (Big-cone douglas fir)
Psilocarphus
    brevissimus var. brevissimus
(Dwarf woollyheads)
    tenellus (Slender woollyheads)
Psilostrophe cooperi (Paperflower)
Psorothamnus
    arborescens var. minutifolius
(Little-leaved Mojave indigo bush)
    arborescens var. simplicifolius
(California indigo bush)
    emoryi (Emory indigo bush)
    polydenius (Dotted indigo bush)
    schottii
(Schott's indigo bush)
    spinosus (Smoke tree)
Ptelea crenulata
(Hop tree)
Pteridium aquilinum var. pubescens
(Bracken fern)
Pteris vittata
(Ladder brake)*
Pterospora andromedea
(Pinedrops)
Pterostegia drymarioides
(Threadstem)
Pulicaria paludosa (Pulicaria)*
Purshia
    mexicana var. stansburyana, see Purshia stansburyana
    stansburyana
(Cliff rose)
    tridentata var. glandulosa
(Desert bitterbrush)

Pycnanthemum californicum (Mountain mint)
Pyrola
    asarifolia ssp. asarifolia
(Bog wintergreen)
    dentata (Toothed wintergreen)
    minor (Lesser wintergreen)

    picta (White-veined wintergreen)
Pyrrocoma
    racemosa var. paniculata
(Panicled pyrrocoma)
    uniflora var. gossypina
(Bear Valley pyrrocoma)


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