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Oemleria cerasiformis (Oso berry)
Oenanthe sarmentosa (Water-parsley)
Oenothera
caespitosa ssp. marginata (Tufted
evening primrose)
californica ssp. avita (Desert
evening primrose)
californica ssp. californica (California
evening primrose)
californica ssp. eurekensis (Eureka
Dunes evening primrose)
cavernae (Cave-dwelling 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)
bigelovii, see Cylindropuntia bigelovii
chlorotica (Pancake
prickly-pear)
echinocarpa, see Cylindropuntia echinocarpa
erinacea var. erinacea, see Opuntia polyacantha var. erinacea
ficus-indica (Mission
cactus)*
fosbergii (Fosberg's
cholla)
littoralis (Coast
prickly-pear)
occidentalis (Western
prickly-pear)
oricola (Chaparral
prickly-pear)
parishii (Mat
cholla)
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
vaseyi (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
broom-rape)
californica ssp. feudgei (California
broom-rape)
cooperi (Cooper's
broom-rape)
fasciculata (Clustered
broom-rape)
parishii ssp. brachyloba
(Short-lobed broom-rape)
parishii ssp. parishii (Parish's broom-rape)
uniflora (Naked
broom-rape)
valida ssp. valida
(Rock Creek broom-rape)
vallicola (Valley broom-rape)
Orthilia secunda (One-sided wintergreen)
Osmadenia tenella (Three-spot)
Osmorhiza
berteroi (Mountain
sweet-cicely)
brachypoda (Sweet-cicely)
chilensis, see Osmorhiza berteroi
Osteospermum ecklonis (African daisy)*
Oxalis
albicans ssp. californica, see Oxalis californica
californica (Wild oxalis)
corniculata (Creeping
wood-sorrel)*
pes-caprae (Bermuda
buttercup)*
pilosa (Hairy wood sorrel)
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)
Parapholis incurva (Curved
sicklegrass)*
Parietaria
hespera var. hespera (Pellitory)
pensylvanica (Pennsylvania pellitory)
Parkinsonia
florida (Palo
verde)
florida fruit (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
densiflora (Indian
warrior)
semibarbata (Pine
lousewort)
Pellaea
andromedifolia (Coffee
fern)
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)
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 (Grinnell's penstemon)
heterophyllus var. australis (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 (Showy
penstemon)
spectabilis var. subviscosus (Showy
penstemon)
stephensii (Stephens' 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
triangularis ssp. triangularis (Goldback
fern)
triangularis ssp. viscosa (Silverback
fern)
Perideridia
parishii ssp. latifolia (Wide-leaved
Parish's yampah)
parishii ssp. parishii (Parish's
yampah)
Peritoma arborea (Bladderpod)
Perityle emoryi (Rock
daisy)
Petalonyx
nitidus (Shinyleaf sandpaper plant)
thurberi (Sandpaper plant)
Petrophyton 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)
brachyloba (Yellow-throated
phacelia)
calthifolia (Caltha-leaved
phacelia)
campanularia ssp. campanularia (Desert
bluebells)
campanularia ssp. vasiformis (Desert bluebells)
cicutaria var. cicutaria (Caterpillar phacelia)
cicutaria var. hispida (Caterpillar
phacelia)
cicutaria var. hubbyi, see Phacelia hubbyi
ciliata (Great Valley phacelia)
crenulata var. ambigua (Notchleaf
phacelia)
crenulata var. crenulata (Notchleaf phacelia)
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 ssp. 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)
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 var. latifolia (Branching
phacelia) * These two vars. are Phacelia ramosissima in JM2
ramossisima var. ramossisima (Branching phacelia) * These two vars. are Phacelia ramosissima in JM2
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 (Stansbury
phlox)
Pholisma
arenarium (Scaly-stemmed sand plant)
sonorae (Sand food)
Pholistoma
auritum var. auritum (Fiesta
flower)
membranaceum (White
fiesta flower)
Phoradendron
bolleanum (Fir
mistletoe)
californicum (Desert
mistletoe)
juniperinum (Juniper
mistletoe)
libocedri (Incense-cedar
mistletoe)
macrophyllum (Big-leaf mistletoe)
villosum (Oak
mistletoe)
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 capitatus (Pacific
ninebark)
Phytolacca americana (Pokeweed)*
Pickeringia
montana var. montana (Chaparral
pea)
montana var. tomentosa (Woolly
chaparral pea)
Picris echioides, see Helminthotheca echioides
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 (Yellow
pine)
quadrifolia (Four-needle
pinyon pine)
sabiniana (Gray pine)
torreyana (Torrey
pine)
Piperia
cooperi (Rein orchid)
elongata (Dense-flowered
rein orchid)
transversa (Royal
rein orchid)
unalascensis (Alaska
rein orchid)
Piptatherum miliaceum (Smilo grass)*
Plagiobothrys
acanthocarpus (Adobe
popcorn flower)
arizonicus (Arizona
popcorn flower)
canescens (Valley
popcorn flower)
collinus var. fulvescens (California
popcorn flower)
fulvus (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 ssp. insignis (Long-spurred
plectritis)
Pleiacanthus spinosus (Thorny
skeleton-plant)
Pleuraphis rigida, see Hilaria rigida
Pleurocoronis pluriseta (Arrowleaf)
Pluchea
odorata (Salt
marsh fleabane)
sericea (Arrow weed)
Poa
atropurpurea (San
Bernardino bluegrass)
bulbosa (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 (Four-leaf
allseed)*
Polygala cornuta var. fishiae (Fish's
milkwort)
Polygonum
amphibium var. emersum (Swamp
knotweed)
arenastrum, see Polygonum aviculare ssp. depressum
aviculare ssp. depressum (Common
knotweed)*
bistortoides, see Bistorta bistortoides
capitatum (Himalayan
smartweed)*
douglasii ssp. douglasii (Douglas's knotweed)
douglasii ssp. johnstonii (Douglas's
knotweed)
lapathifolium (Willow
smartweed)
punctatum (Water
smartweed)
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 (Black
cottonwood)
fremontii ssp. fremontii (Fremont's
cottonwood)
tremuloides (Quaking
aspen)
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. 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. fastigiata (Slender
cinquefoil)
norvegica (Norwegian cinquefoil)*
wheeleri (Wheeler's
cinquefoil)
Prenanthella exigua (Bright white)
Prosopis
glandulosa var. torreyana (Honey
mesquite)
pubescens (Screwbean
mesquite)
Prunella vulgaris var. lanceolata (Self-heal)
Prunus
andersonii (Desert
peach)
emarginata (Bitter
cherry)
eremophila (Desert
prunus)
fasciculata var. fasciculata (Desert
almond)
fremontii (Desert
apricot)
ilicifolia ssp. ilicifolia (Hollyleaf
cherry)
ilicifolia ssp. ilicifolia fruit (Hollyleaf
cherry)
ilicifolia ssp. lyonii (Catalina
cherry)
virginiana var. demissus (Western
chokecherry)
Psathyrotes
annua (Fan leaf)
ramosissima (Turtleback)
Pseudognaphalium
beneolens
(Fragrant
everlasting)
biolettii (Two-tone
everlasting)
californicum (California
everlasting)
luteoalbum (Weedy
cudweed)*
microcephalum (Feltleaf
everlasting)
ramosissimum (Pink
cudweed)
stramineum (Cotton-batting plant)
thermale (Slender
everlasting)
Pseudostellaria jamesiana (Sticky
starwort)
Pseudotsuga macrocarpa (Big-cone spruce)
Psilocarphus
brevissimus var. brevissimus (Dwarf
woollyheads)
tenellus var. 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)
Pteridium aquilinum var. pubescens (Bracken
fern)
Pteris vittata (Ladder brake)*
Pterospora andromedea (Pinedrops)
Pterostegia drymarioides (Threadstem)
Pulicaria paludosa (Pulicaria)*
Purshia
mexicana var. stansburyana (Cliff
rose)
tridentata var. glandulosa (Desert bitterbrush)
Pycnanthemum californicum (Mountain
mint)
Pyrola
asarifolia ssp. asarifolia (Bog
wintergreen)
picta (White-veined
wintergreen)
Pyrrocoma uniflora var. gossypina (Bear
Valley pyrrocoma) |