Scientific Name

Common Name

Abies amabilis

Pacific silver fir

Abies lasiocarpa var. lasiocarpa

subalpine fir

Abronia alpina

Ramshaw Meadows abronia

Abronia maritima

red sand-verbena

Acanthomintha duttonii

San Mateo thorn-mint

Acanthomintha ilicifolia

San Diego thorn-mint

Acanthomintha lanceolata

Santa Clara thorn-mint

Agave shawii

Shaw's agave

Agave utahensis

Utah agave

Ageratina shastensis

Shasta ageratina

Agrostis blasdalei

Blasdale's bent grass

Allium hickmanii

Hickman's onion

Allium hoffmanii

Beegum onion

Allium munzii

Munz's onion

Allium sanbornii var. congdonii

Congdon's onion

Allium sanbornii var. sanbornii

Sanborn's onion

Allium shevockii

Spanish Needle onion

Allium siskiyouense

Siskiyou onion

Allium yosemitense

Yosemite onion

Alopecurus aequalis var. sonomensis

Sonoma alopecurus

Ambrosia chenopodiifolia

San Diego bur-sage

Amsinckia grandiflora

large-flowered fiddleneck

Androstephium breviflorum

small-flowered androstephium

Angelica callii

Call's angelica

Antennaria flagellaris

stoloniferous pussytoes

Antirrhinum virga

tall snapdragon

Aphanisma blitoides

aphanisma

Arabis blepharophylla

coast rock cress

Arabis constancei

Constance's rock cress

Arabis koehleri var. stipitata

Koehler's stipitate rock cress

Arabis macdonaldiana

McDonald's rock cress

Arabis modesta

modest rock cress

Arabis parishii

Parish's rock cress

Arabis pygmaea

Tulare County rock cress

Arabis serpentinicola

Preston Peak rock cress

Arabis shockleyi

Shockley's rock cress

Arabis tiehmii

Tiehm's rock cress

Arctomecon merriamii

white bear poppy

Arctostaphylos auriculata

Mt. Diablo manzanita

Arctostaphylos bakeri ssp. bakeri

Baker's manzanita

Arctostaphylos cruzensis

Arroyo de la Cruz manzanita

Arctostaphylos densiflora

Vine Hill manzanita

Arctostaphylos edmundsii

Little Sur manzanita

Arctostaphylos glutinosa

Schreiber's manzanita

Arctostaphylos hookeri ssp. franciscana

Franciscan manzanita

Arctostaphylos hookeri ssp. hearstiorum

Hearst's manzanita

Arctostaphylos hookeri ssp. hookeri

Hooker's manzanita

Arctostaphylos hookeri ssp. ravenii

Presidio manzanita

Arctostaphylos imbricata

San Bruno Mountain manzanita

Arctostaphylos luciana

Santa Lucia manzanita

Arctostaphylos morroensis

Morro manzanita

Arctostaphylos myrtifolia

Ione manzanita

Arctostaphylos nissenana

Nissenan manzanita

Arctostaphylos pallida

pallid manzanita

Arctostaphylos pechoensis

Pecho manzanita

Arctostaphylos pilosula

Santa Margarita manzanita

Arctostaphylos pumila

sandmat manzanita

Arctostaphylos rudis

sand mesa manzanita

Arctostaphylos silvicola

Bonny Doon manzanita

Arctostaphylos virgata

Marin manzanita

Arenaria paludicola

marsh sandwort

Arnica venosa

Shasta County arnica

Arnica viscosa

Mt. Shasta arnica

Asclepias solanoana

serpentine milkweed

Asplenium trichomanes-ramosum

green spleenwort

Aster lentus

Suisun Marsh aster

Astragalus agnicidus

Humboldt milk-vetch

Astragalus albens

Cushenbury milk-vetch

Astragalus anxius

troubled milk-vetch

Astragalus argophyllus var. argophyllus

silver-leaved milk-vetch

Astragalus brauntonii

Braunton's milk-vetch

Astragalus breweri

Brewer's milk-vetch

Astragalus clarianus

Clara Hunt's milk-vetch

Astragalus crotalariae

Salton milk-vetch

Astragalus ertterae

Walker Pass milk-vetch

Astragalus funereus

black milk-vetch

Astragalus insularis var. harwoodii

Harwood's milk-vetch

Astragalus jaegerianus

Lane Mountain milk-vetch

Astragalus johannis-howellii

Long Valley milk-vetch

Astragalus kentrophyta var. danaus

Sweetwater Mountains milk-vetch

Astragalus kentrophyta var. elatus

spiny-leaved milk-vetch

Astragalus lentiformis

lens-pod milk-vetch

Astragalus lentiginosus var. borreganus

Borrego milk-vetch

Astragalus lentiginosus var. coachellae

Coachella Valley milk-vetch

Astragalus lentiginosus var. kernensis

Kern Plateau milk-vetch

Astragalus lentiginosus var. micans

shining milk-vetch

Astragalus lentiginosus var. piscinensis

Fish Slough milk-vetch

Astragalus lentiginosus var. sesquimetralis

Sodaville milk-vetch

Astragalus monoensis var. monoensis

Mono milk-vetch

Astragalus monoensis var. ravenii

Raven's milk-vetch

Astragalus pauperculus

depauperate milk-vetch

Astragalus pseudiodanthus

Tonopah milk-vetch

Astragalus pycnostachyus var. lanosissimus

Ventura marsh milk-vetch

Astragalus rattanii var. jepsonianus

Jepson's milk-vetch

Astragalus serenoi var. shockleyi

naked milk-vetch

Astragalus shevockii

Shevock's milk-vetch

Astragalus subvestitus

Kern County milk-vetch

Astragalus tener var. tener

alkali milk-vetch

Astragalus tener var. titi

coastal dunes milk-vetch

Astragalus webberi

Webber's milk-vetch

Atriplex joaquiniana

San Joaquin spearscale

Atriplex pacifica

South Coast saltscale

Atriplex vallicola

Lost Hills crownscale

Balsamorhiza macrolepis var. macrolepis

big-scale balsamroot

Bensoniella oregona

bensoniella

Berberis nevinii

Nevin's barberry

Bergerocactus emoryi

golden-spined cereus

Blennosperma bakeri

Sonoma sunshine

Blennosperma nanum var. robustum

Point Reyes blennosperma

Bloomeria humilis

dwarf goldenstar

Brodiaea coronaria ssp. rosea

Indian Valley brodiaea

Brodiaea filifolia

thread-leaved brodiaea

Brodiaea insignis

Kaweah brodiaea

Brodiaea orcuttii

Orcutt's brodiaea

Brodiaea pallida

Chinese Camp brodiaea

Bursera microphylla

elephant tree

Calamagrostis ophitidis

serpentine reed grass

Calandrinia maritima

seaside calandrinia

Calliandra eriophylla

fairyduster

Calochortus clavatus ssp. recurvifolius

Arroyo de la Cruz mariposa lily

Calochortus clavatus var. avius

Pleasant Valley mariposa lily

Calochortus dunnii

Dunn's mariposa lily

Calochortus excavatus

Inyo County star-tulip

Calochortus greenei

Greene's mariposa lily

Calochortus longebarbatus var. longebarbatus

long-haired star-tulip

Calochortus obispoensis

San Luis mariposa lily

Calochortus palmeri var. palmeri

Palmer's mariposa lily

Calochortus panamintensis

Panamint mariposa lily

Calochortus persistens

Siskiyou mariposa lily

Calochortus plummerae

Plummer's mariposa lily

Calochortus pulchellus

Mt. Diablo fairy-lantern

Calochortus striatus

alkali mariposa lily

Calochortus tiburonensis

Tiburon mariposa lily

Calochortus umbellatus

Oakland star-tulip

Calochortus weedii var. vestus

late-flowered mariposa lily

Calochortus westonii

Shirley Meadows star-tulip

Calyptridium pulchellum

Mariposa pussypaws

Calyptridium quadripetalum

four-petaled pussypaws

Calystegia collina ssp. oxyphylla

Mt. Saint Helena morning-glory

Calystegia macrostegia ssp. amplissima

island morning-glory

Calystegia peirsonii

Peirson's morning-glory

Calystegia stebbinsii

Stebbins's morning-glory

Camissonia benitensis

San Benito evening-primrose

Camissonia hardhamiae

Hardham's evening-primrose

Camissonia tanacetifolia ssp. quadriperforata

Sierra Valley evening-primrose

Campanula californica

swamp harebell

Campanula scabrella

rough harebell

Campanula sharsmithiae

Sharsmith's harebell

Campanula wilkinsiana

Wilkin's harebell

Canbya candida

pygmy poppy

Carex albida

white sedge

Carex californica

California sedge

Carex obispoensis

San Luis Obispo sedge

Carex tompkinsii

Tompkins's sedge

Carlowrightia arizonica

Arizona carlowrightia

Carpenteria californica

tree-anemone

Castela emoryi

crucifixion thorn

Castilleja affinis ssp. neglecta

Tiburon Indian paintbrush

Castilleja ambigua ssp. humboldtiensis

Humboldt Bay owl's-clover

Castilleja campestris ssp. succulenta

succulent owl's-clover

Castilleja grisea

San Clemente Island Indian paintbrush

Castilleja hispida ssp. brevilobata

short-lobed Indian paintbrush

Castilleja lanata ssp. hololeuca

white-felted Indian paintbrush

Castilleja lasiorhyncha

San Bernardino Mountains owl's-clover

Castilleja latifolia

Monterey Indian paintbrush

Castilleja mendocinensis

Mendocino coast Indian paintbrush

Castilleja mollis

soft-leaved Indian paintbrush

Castilleja uliginosa

Pitkin Marsh Indian paintbrush

Caulanthus californicus

California jewel-flower

Caulostramina jaegeri

Jaeger's caulostramina

Ceanothus confusus

Rincon Ridge ceanothus

Ceanothus cuneatus var. rigidus

Monterey ceanothus

Ceanothus divergens

Calistoga ceanothus

Ceanothus gloriosus var. gloriosus

Point Reyes ceanothus

Ceanothus gloriosus var. porrectus

Mt. Vision ceanothus

Ceanothus hearstiorum

Hearst's ceanothus

Ceanothus maritimus

maritime ceanothus

Ceanothus purpureus

holly-leaved ceanothus

Ceanothus roderickii

Pine Hill ceanothus

Ceanothus verrucosus

white coast ceanothus

Cercocarpus traskiae

Catalina Island mountain-mahogany

Chaenactis suffrutescens

Shasta chaenactis

Chamaesyce hooveri

Hoover's spurge

Chenopodium simplex

large-seeded goosefoot

Chlorogalum grandiflorum

Red Hills soaproot

Chlorogalum purpureum var. purpureum

purple amole

Chlorogalum purpureum var. reductum

Camatta Canyon amole

Chorizanthe breweri

Brewer's spineflower

Chorizanthe cuspidata var. cuspidata

San Francisco Bay spineflower

Chorizanthe cuspidata var. villosa

woolly-headed spineflower

Chorizanthe howellii

Howell's spineflower

Chorizanthe procumbens

prostrate spineflower

Chorizanthe pungens var. pungens

Monterey spineflower

Chorizanthe rectispina

straight-awned spineflower

Chorizanthe valida

Sonoma spineflower

Cirsium ciliolatum

Ashland thistle

Cirsium crassicaule

slough thistle

Cirsium fontinale var. campylon

Mt. Hamilton thistle

Cirsium fontinale var. fontinale

fountain thistle

Cirsium fontinale var. obispoense

Chorro Creek bog thistle

Cirsium hydrophilum var. hydrophilum

Suisun thistle

Cirsium hydrophilum var. vaseyi

Mt. Tamalpais thistle

Cirsium loncholepis

La Graciosa thistle

Cirsium occidentale var. compactum

compact cobwebby thistle

Cirsium rhothophilum

surf thistle

Clarkia australis

Small's southern clarkia

Clarkia breweri

Brewer's clarkia

Clarkia delicata

delicate clarkia

Clarkia franciscana

Presidio clarkia

Clarkia imbricata

Vine Hill clarkia

Clarkia lingulata

Merced clarkia

Clarkia speciosa ssp. immaculata

Pismo clarkia

Clarkia springvillensis

Springville clarkia

Collinsia corymbosa

round-headed chinese houses

Collinsia multicolor

San Francisco collinsia

Collomia rawsoniana

flaming trumpet

Colubrina californica

Las Animas colubrina

Convolvulus simulans

small-flowered morning-glory

Corallorhiza trifida

northern coralroot

Cordylanthus capitatus

Yakima bird's-beak

Cordylanthus eremicus ssp. kernensis

Kern Plateau bird's-beak

Cordylanthus maritimus ssp. maritimus

salt marsh bird's-beak

Cordylanthus maritimus ssp. palustris

Point Reyes bird's-beak

Cordylanthus mollis ssp. hispidus

hispid bird's-beak

Cordylanthus mollis ssp. mollis

soft bird's-beak

Cordylanthus palmatus

palmate-bracted bird's-beak

Cordylanthus rigidus ssp. littoralis

seaside bird's-beak

Cordylanthus tecopensis

Tecopa bird's-beak

Cordylanthus tenuis ssp. brunneus

serpentine bird's-beak

Cordylanthus tenuis ssp. capillaris

Pennell's bird's-beak

Cordylanthus tenuis ssp. pallescens

pallid bird's-beak

Coreopsis hamiltonii

Mt. Hamilton coreopsis

Coreopsis maritima

sea dahlia

Corethrogyne filaginifolia var. linifolia

Del Mar Mesa sand aster

Corethrogyne leucophylla

branching beach aster

Corydalis caseana ssp. caseana

Sierra corydalis

Crossosoma californicum

Catalina crossosoma

Croton wigginsii

Wiggins's croton

Cryptantha crinita

silky cryptantha

Cryptantha roosiorum

bristlecone cryptantha

Cryptantha scoparia

gray cryptantha

Cupressus abramsiana

Santa Cruz cypress

Cupressus arizonica ssp. nevadensis

Piute cypress

Cupressus goveniana ssp. goveniana

Gowen cypress

Cupressus goveniana ssp. pigmaea

pygmy cypress

Cupressus macrocarpa

Monterey cypress

Cupressus stephensonii

Cuyamaca cypress

Cusickiella quadricostata

Bodie Hills cusickiella

Cymopterus gilmanii

Gilman's cymopterus

Cymopterus ripleyi

Ripley's cymopterus

Cynanchum utahense

Utah vine milkweed

Cypripedium californicum

California lady's-slipper

Cypripedium fasciculatum

clustered lady's-slipper

Cypripedium montanum

mountain lady's-slipper