Scientific Name

Common Name

Machaeranthera asteroides var. lagunensis

Mount Laguna aster

Machaeranthera canescens var. ziegleri

Ziegler's aster

Machaeranthera juncea

rush-like bristleweed

Madia doris-nilesiae

Niles's madia

Madia nutans

nodding madia

Madia radiata

showy madia

Madia yosemitana

Yosemite madia

Malacothamnus abbottii

Abbott's bush mallow

Malacothamnus aboriginum

Indian Valley bush mallow

Malacothamnus arcuatus

arcuate bush mallow

Malacothamnus davidsonii

Davidson's bush mallow

Malacothamnus fasciculatus var. nesioticus

Santa Cruz Island bush mallow

Malacothamnus gracilis

slender bush mallow

Malacothamnus jonesii

Jones's bush mallow

Malacothamnus niveus

San Luis Obispo County bush mallow

Malacothamnus palmeri var. lucianus

Arroyo Seco bush mallow

Malacothamnus palmeri var. palmeri

Santa Lucia bush mallow

Malacothamnus parishii

Parish's bush mallow

Malacothrix foliosa

leafy malacothrix

Malacothrix incana

dunedelion

Malacothrix squalida

island malacothrix

Malperia tenuis

brown turbans

Marina orcuttii var. orcuttii

California marina

Marsilea oligospora

Nelson's pepperwort

Matelea parvifolia

spearleaf

Maurandya antirrhiniflora ssp. antirrhiniflora

violet twining snapdragon

Melica spectabilis

purple onion grass

Mertensia bella

Oregon lungwort

Microseris borealis

northern microseris

Microseris douglasii var. platycarpha

small-flowered microseris

Mimulus acutidens

Kings River monkeyflower

Mimulus brachiatus

serpentine monkeyflower

Mimulus brandegei

Santa Cruz Island monkeyflower

Mimulus clevelandii

Cleveland's bush monkeyflower

Mimulus diffusus

Palomar monkeyflower

Mimulus exiguus

San Bernardino Mountains monkeyflower

Mimulus filicaulis

slender-stemmed monkeyflower

Mimulus glabratus ssp. utahensis

Utah monkeyflower

Mimulus glaucescens

shield-bracted monkeyflower

Mimulus gracilipes

slender-stalked monkeyflower

Mimulus grayi

Gray's monkeyflower

Mimulus inconspicuus

small-flowered monkeyflower

Mimulus laciniatus

cut-leaved monkeyflower

Mimulus microphyllus

small-leaved monkeyflower

Mimulus nudatus

bare monkeyflower

Mimulus pulchellus

pansy monkeyflower

Mimulus purpureus

purple monkeyflower

Mimulus rattanii ssp. decurtatus

Santa Cruz County monkeyflower

Mimulus subsecundus

one-sided monkeyflower

Mimulus traskiae

Santa Catalina Island monkeyflower

Mimulus whipplei

Whipple's monkeyflower

Minuartia decumbens

The Lassics sandwort

Minuartia howellii

Howell's sandwort

Minuartia obtusiloba

alpine sandwort

Minuartia stolonifera

Scott Mountain sandwort

Mirabilis tenuiloba

slender-lobed four o'clock

Monardella antonina ssp. antonina

San Antonio Hills monardella

Monardella antonina ssp. benitensis

San Benito monardella

Monardella candicans

Sierra monardella

Monardella cinerea

gray monardella

Monardella douglasii ssp. venosa

veiny monardella

Monardella follettii

Follett's monardella

Monardella hypoleuca ssp. lanata

felt-leaved monardella

Monardella leucocephala

Merced monardella

Monardella linoides ssp. oblonga

flax-like monardella

Monardella macrantha ssp. hallii

Hall's monardella

Monardella nana ssp. leptosiphon

San Felipe monardella

Monardella pringlei

Pringle's monardella

Monardella robisonii

Robison's monardella

Monardella undulata

curly-leaved monardella

Monardella villosa ssp. globosa

robust monardella

Monardella viridis ssp. saxicola

rock monardella

Monardella viridis ssp. viridis

green monardella

Monotropa uniflora

Indian-pipe

Montia howellii

Howell's montia

Mucronea californica

California spineflower

Muhlenbergia appressa

appressed muhly

Muhlenbergia arsenei

tough muhly

Muhlenbergia californica

California muhly

Muhlenbergia fragilis

delicate muhly

Muhlenbergia pauciflora

few-flowered muhly

Munroa squarrosa

false buffalo-grass

Myosurus minimus ssp. apus

little mousetail

Nama dichotomum var. dichotomum

forked purple mat

Nama stenocarpum

mud nama

Navarretia eriocephala

hoary navarretia

Navarretia jaredii

Paso Robles navarretia

Navarretia leucocephala ssp. bakeri

Baker's navarretia

Navarretia myersii

pincushion navarretia

Navarretia nigelliformis ssp. radians

shining navarretia

Navarretia peninsularis

Baja navarretia

Navarretia rosulata

Marin County navarretia

Nemacaulis denudata var. denudata

coast woolly-heads

Nemacaulis denudata var. gracilis

slender woolly-heads

Nemacladus gracilis

slender nemacladus

Nemophila parviflora var. quercifolia

oak-leaved nemophila

Neviusia cliftonii

Shasta snow-wreath

Opuntia curvospina

curved-spine beavertail

Opuntia fragilis

brittle prickly-pear

Opuntia parryi var. serpentina

snake cholla

Opuntia wigginsii

Wiggins's cholla

Opuntia wolfii

Wolf's cholla

Oreonana vestita

woolly mountain-parsley

Ornithostaphylos oppositifolia

Baja California birdbush

Orobanche parishii ssp. brachyloba

short-lobed broom-rape

Orobanche valida ssp. valida

Rock Creek broomrape

Orthocarpus cuspidatus ssp. cuspidatus

Siskiyou Mountains orthocarpus

Oxytheca caryophylloides

chickweed oxytheca

Oxytheca emarginata

white-margined oxytheca

Oxytheca parishii var. abramsii

Abrams's oxytheca

Oxytropis deflexa var. sericea

blue pendent-pod oxytrope

Palafoxia arida var. gigantea

giant Spanish-needle

Pedicularis bracteosa var. flavida

yellowish lousewort

Pedicularis centranthera

dwarf lousewort

Pedicularis crenulata

scalloped-leaved lousewort

Pedicularis howellii

Howell's lousewort

Pellaea truncata

cliff brake

Penstemon barnebyi

Barneby's beardtongue

Penstemon californicus

California beardtongue

Penstemon cinereus

gray beardtongue

Penstemon cinicola

ash beardtongue

Penstemon clevelandii var. connatus

San Jacinto beardtongue

Penstemon fruticiformis var. amargosae

Death Valley beardtongue

Penstemon heterodoxus var. shastensis

Shasta beardtongue

Penstemon newberryi var. sonomensis

Sonoma beardtongue

Penstemon rattanii var. kleei

Santa Cruz Mountains beardtongue

Penstemon thurberi

Thurber's beardtongue

Penstemon tracyi

Tracy's beardtongue

Pentachaeta bellidiflora

white-rayed pentachaeta

Perideridia parishii ssp. parishii

Parish's yampah

Perideridia pringlei

adobe yampah

Perityle villosa

Hanaupah rock daisy

Petalonyx thurberi ssp. gilmanii

Death Valley sandpaper-plant

Peteria thompsoniae

spine-noded milk vetch

Phacelia amabilis

Saline Valley phacelia

Phacelia ciliata var. opaca

Merced phacelia

Phacelia cinerea

ashy phacelia

Phacelia exilis

Transverse Range phacelia

Phacelia floribunda

many-flowered phacelia

Phacelia insularis var. insularis

northern Channel Islands phacelia

Phacelia inundata

playa phacelia

Phacelia inyoensis

Inyo phacelia

Phacelia leonis

Siskiyou phacelia

Phacelia mohavensis

Mojave phacelia

Phacelia parishii

Parish's phacelia

Phacelia pulchella var. gooddingii

Goodding's phacelia

Phacelia sericea var. ciliosa

blue alpine phacelia

Phacelia stellaris

Brand's phacelia

Phacelia suaveolens ssp. keckii

Santiago Peak phacelia

Phaseolus filiformis

slender-stem bean

Phlox dispersa

High Sierra phlox

Phlox dolichantha

Big Bear Valley phlox

Pholistoma auritum var. arizonicum

Arizona pholistoma

Physalis lobata

lobed ground-cherry

Pinus edulis

two-needle pinyon pine

Pinus torreyana ssp. insularis

Santa Rosa Island Torrey pine

Piperia candida

white-flowered rein orchid

Piperia michaelii

Michael's rein orchid

Piperia yadonii

Yadon's rein orchid

Piptatherum micranthum

small-flowered rice grass

Plagiobothrys chorisianus var. chorisianus

Choris's popcorn-flower

Plagiobothrys diffusus

San Francisco popcorn-flower

Plagiobothrys glaber

hairless popcorn-flower

Plagiobothrys glomeratus

Mammoth popcorn-flower

Plagiobothrys glyptocarpus var. modestus

Cedar Crest popcorn-flower

Plagiobothrys hystriculus

bearded popcorn-flower

Plagiobothrys lithocaryus

Mayacamas popcorn-flower

Plagiobothrys mollis var. vestitus

Petaluma popcorn-flower

Plagiobothrys myosotoides

forget-me-not popcorn-flower

Plagiobothrys salsus

desert popcorn-flower

Plagiobothrys uncinatus

hooked popcorn-flower

Platystemon californicus var. ciliatus

Santa Barbara Island cream cups

Pleuropogon davyi

Davy's semaphore grass

Poa abbreviata ssp. marshii

Marsh's blue grass

Poa abbreviata ssp. pattersonii

Patterson's blue grass

Poa piperi

Piper's blue grass

Poa rhizomata

timber blue grass

Podistera nevadensis

Sierra podistera

Pogogyne floribunda

profuse-flowered pogogyne

Poliomintha incana

frosted mint

Polygala cornuta var. fishiae

Fish's milkwort

Polygala heterorhyncha

notch-beaked milkwort

Polygala subspinosa

spiny milkwort

Polygonum marinense

Marin knotweed

Polygonum polygaloides ssp. esotericum

Modoc County knotweed

Polystichum lonchitis

holly fern

Populus angustifolia

narrow-leaved cottonwood

Portulaca halimoides

desert portulaca

Potamogeton epihydrus ssp. nuttallii

Nuttall's pondweed

Potamogeton filiformis

slender-leaved pondweed

Potamogeton foliosus var. fibrillosus

fibrous pondweed

Potamogeton praelongus

white-stemmed pondweed

Potamogeton robbinsii

Robbins's pondweed

Potamogeton zosteriformis

eel-grass pondweed

Potentilla basaltica

Black Rock potentilla

Potentilla concinna

alpine cinquefoil

Potentilla glandulosa ssp. ewanii

Ewan's cinquefoil

Potentilla hickmanii

Hickman's cinquefoil

Potentilla morefieldii

Morefield's cinquefoil

Potentilla multijuga

Ballona cinquefoil

Potentilla newberryi

Newberry's cinquefoil

Potentilla rimicola

cliff cinquefoil

Proboscidea althaeifolia

desert unicorn-plant

Prunus fasciculata var. punctata

sand almond

Psilocarphus brevissimus var. multiflorus

delta woolly-marbles

Psilocarphus elatior

tall woolly-marbles

Psilocarphus tenellus var. globiferus

round woolly-marbles

Psorothamnus arborescens var. arborescens

Mojave indigo-bush

Puccinellia californica

Sierra Nevada alkali grass

Puccinellia parishii

Parish's alkali grass

Puccinellia pumila

dwarf alkali grass

Pyrrocoma lucida

sticky pyrrocoma

Pyrrocoma racemosa var. congesta

Del Norte pyrrocoma

Quercus dumosa

Nuttall's scrub oak

Quercus parvula var. parvula

Santa Cruz Island oak

Quercus tomentella

island oak

Raillardiopsis scabrida

scabrid raillardella

Ranunculus hydrocharoides

frog's-bit buttercup

Rhus trilobata var. simplicifolia

single-leaved skunkbrush

Rhynchospora alba

white beaked-rush

Rhynchospora californica

California beaked-rush

Rhynchospora globularis var. globularis

round-headed beaked-rush

Ribes amarum var. hoffmannii

bitter gooseberry

Ribes canthariforme

Moreno currant

Ribes divaricatum var. parishii

Parish's gooseberry

Ribes hudsonianum var. petiolare

western black currant

Ribes laxiflorum

trailing black currant

Ribes marshallii

Marshall's gooseberry

Ribes menziesii var. ixoderme

aromatic canyon gooseberry

Ribes sericeum

Santa Lucia gooseberry

Ribes viburnifolium

Santa Catalina Island currant

Rorippa columbiae

Columbia yellow cress

Rubus glaucifolius var. ganderi

Cuyamaca raspberry

Rubus nivalis

snow dwarf bramble

Rupertia hallii

Hall's rupertia

Rupertia rigida

Parish's rupertia

Salix bebbiana

gray willow

Salix brachycarpa ssp. brachycarpa

short-fruited willow

Salix delnortensis

Del Norte willow

Salix reticulata ssp. nivalis

snow willow

Salvia brandegei

Brandegee's sage

Salvia dorrii var. incana

fleshy sage

Salvia eremostachya

desert sage

Salvia greatae

Orocopia sage

Salvia munzii

Munz's sage

Sanguisorba officinalis

great burnet

Sanicula hoffmannii

Hoffmann's sanicle

Sanicula peckiana

Peck's sanicle

Sanicula tracyi

Tracy's sanicle

Sanvitalia abertii

Abert's sanvitalia

Saxifraga cespitosa

tufted saxifrage

Saxifraga howellii

Howell's saxifrage

Saxifraga nuttallii

Nuttall's saxifrage

Saxifraga rufidula

rusty saxifrage

Scheuchzeria palustris var. americana

American scheuchzeria

Scirpus clementis

Yosemite bulrush

Scirpus heterochaetus

slender bulrush

Scirpus pumilus

dwarf bulrush

Scirpus subterminalis

water bulrush

Scleropogon brevifolius

burro grass

Scrophularia villosa

Santa Catalina figwort

Scutellaria bolanderi ssp. austromontana

southern skullcap

Scutellaria galericulata

marsh skullcap

Scutellaria holmgreniorum

Holmgren's skullcap

Scutellaria lateriflora

mad-dog skullcap

Sedum divergens

Cascade stonecrop

Sedum eastwoodiae

Red Mountain stonecrop

Sedum laxum ssp. heckneri

Heckner's stonecrop

Sedum niveum

Davidson's stonecrop

Sedum oblanceolatum

Applegate stonecrop

Sedum paradisum

Canyon Creek stonecrop

Selaginella asprella

bluish spike-moss

Selaginella cinerascens

ashy spike-moss

Selaginella densa var. scopulorum

Rocky Mountain spike-moss

Selaginella eremophila

desert spike-moss

Selaginella leucobryoides

Mojave spike-moss

Selinocarpus nevadensis

desert wing-fruit

Senecio aphanactis

rayless ragwort

Senecio bernardinus

San Bernardino ragwort

Senecio hydrophiloides

sweet marsh ragwort

Senecio ionophyllus

Tehachapi ragwort

Senecio layneae

Layne's ragwort

Senecio macounii

Siskiyou Mountains ragwort

Senecio pattersonensis

Mono ragwort

Senna covesii

Coves's cassia

Sibara filifolia

Santa Cruz Island rock cress

Sidalcea calycosa ssp. rhizomata

Point Reyes checkerbloom

Sidalcea hickmanii ssp. hickmanii

Hickman's checkerbloom

Sidalcea hickmanii ssp. parishii

Parish's checkerbloom

Sidalcea hickmanii ssp. viridis

Marin checkerbloom

Sidalcea keckii

Keck's checkerbloom

Sidalcea malvaeflora ssp. patula

Siskiyou checkerbloom

Sidalcea neomexicana

salt spring checkerbloom

Sidalcea oregana ssp. eximia

coast checkerbloom

Sidalcea oregana ssp. hydrophila

marsh checkerbloom

Silene campanulata ssp. campanulata

Red Mountain catchfly

Silene marmorensis

Marble Mountain campion

Silene occidentalis ssp. longistipitata

western campion

Silene suksdorfii

Cascade alpine campion

Silene verecunda ssp. verecunda

San Francisco campion

Smilax jamesii

English Peak greenbriar

Solanum wallacei

Wallace's nightshade

Solidago gigantea

smooth goldenrod

Solidago guiradonis

Guirado's goldenrod

Sparganium natans

small bur-reed

Spartina gracilis

alkali cord grass

Sphaeralcea rusbyi var. eremicola

Rusby's desert-mallow

Sphenopholis obtusata

prairie wedge grass

Stebbinsoseris decipiens

Santa Cruz microseris

Stellaria longifolia

long-leaved starwort

Stellaria obtusa

obtuse starwort

Stenotus lanuginosus

woolly stenotus

Streptanthus bernardinus

Laguna Mountains jewel-flower

Streptanthus brachiatus ssp. hoffmanii

Freed's jewel-flower

Streptanthus glandulosus ssp. pulchellus

Mt. Tamalpais jewel-flower

Streptanthus glandulosus var. hoffmanii

secund jewel-flower

Streptanthus morrisonii ssp. elatus

Three Peaks jewel-flower

Streptanthus morrisonii ssp. hirtiflorus

Dorr's Cabin jewel-flower

Streptanthus morrisonii ssp. kruckebergii

Kruckeberg's jewel-flower

Streptanthus morrisonii ssp. morrisonii

Morrison's jewel-flower

Stylocline citroleum

oil neststraw

Stylocline masonii

Mason's neststraw

Stylocline sonorensis

mesquite neststraw

Suaeda esteroa

estuary seablite

Suaeda taxifolia

woolly seablite

Swertia neglecta

pine green-gentian

Syntrichopappus lemmonii

Lemmon's syntrichopappus

Systenotheca vortriedei

Vortriede's spineflower

Tauschia glauca

glaucous tauschia

Tauschia howellii

Howell's tauschia

Tetradymia argyraea

striped horsebrush

Thelypteris puberula var. sonorensis

Sonoran maiden fern

Thermopsis gracilis

slender false lupine

Thermopsis macrophylla

Santa Ynez false lupine

Thermopsis robusta

robust false lupine

Tiarella trifoliata var. trifoliata

trifoliate laceflower

Tonestus eximius

Tahoe tonestus

Tonestus lyallii

Lyall's tonestus

Townsendia parryi

Parry's townsendia

Trichocoronis wrightii var. wrightii

Wright's trichocoronis

Trichostema micranthum

small-flowered bluecurls

Trichostema ovatum

San Joaquin bluecurls

Trichostema rubisepalum

Hernandez bluecurls

Trientalis arctica

arctic starflower

Trifolium bolanderi

Bolander's clover

Trifolium buckwestiorum

Santa Cruz clover

Trifolium gracilentum var. palmeri

southern island clover

Trifolium howellii

Howell's clover

Trillium ovatum ssp. oettingeri

Salmon Mountains wakerobin

Trimorpha acris var. debilis

northern daisy

Triteleia crocea var. crocea

yellow triteleia

Triteleia crocea var. modesta

Trinity Mountains triteleia

Triteleia hendersonii var. hendersonii

Henderson's triteleia

Triteleia ixioides ssp. cookii

Cook's triteleia

Tropidocarpum capparideum

caper-fruited tropidocarpum

Vaccinium coccineum

Siskiyou Mountains huckleberry

Vaccinium scoparium

little-leaved huckleberry

Veratrum insolitum

Siskiyou false-hellebore

Viguiera laciniata

San Diego County viguiera

Viola aurea

golden violet

Viola langsdorfii

Langsdorf's violet

Viola palustris

marsh violet

Viola pinetorum ssp. grisea

grey-leaved violet

Wislizenia refracta ssp. refracta

jackass-clover

Wyethia elata

Hall's wyethia

Wyethia longicaulis

Humboldt County wyethia

Xylorhiza cognata

Mecca-aster