Rare Plant Program

Scientific Name

Common Name

Abies bracteata

bristlecone fir

Abronia nana ssp. covillei

Coville's dwarf abronia

Abronia umbellata ssp. breviflora

pink sand-verbena

Acanthomintha obovata ssp. cordata

heart-leaved thorn-mint

Acanthomintha obovata ssp. obovata

San Benito thorn-mint

Achnatherum aridum

Mormon needle grass

Achnatherum diegoense

San Diego County needle grass

Achnatherum lemmonii var. pubescens

pubescent needle grass

Acleisanthes longiflora

angel trumpets

Adolphia californica

California adolphia

Agrostis hendersonii

Henderson's bent grass

Agrostis hooveri

Hoover's bent grass

Agrostis humilis

mountain bent grass

Allium atrorubens var. atrorubens

Great Basin onion

Allium fimbriatum var. purdyi

Purdy's onion

Allium howellii var. clokeyi

Mt. Pinos onion

Allium jepsonii

Jepson's onion

Allium nevadense

Nevada onion

Allium parishii

Parish's onion

Allium sharsmithae

Sharsmith's onion

Allium tribracteatum

three-bracted onion

Allium tuolumnense

Rawhide Hill onion

Ambrosia pumila

San Diego ambrosia

Ammoselinum giganteum

desert sand-parsley

Amsinckia lunaris

bent-flowered fiddleneck

Amsinckia vernicosa var. furcata

forked fiddleneck

Androsace elongata ssp. acuta

California androsace

Androsace filiformis

slender-stemmed androsace

Antennaria marginata

white-margined everlasting

Antennaria pulchella

beautiful pussy-toes

Antennaria suffrutescens

evergreen everlasting

Antirrhinum cyathiferum

Deep Canyon snapdragon

Antirrhinum ovatum

oval-leaved snapdragon

Antirrhinum subcordatum

dimorphic snapdragon

Arabis aculeolata

Waldo rock cress

Arabis bodiensis

Bodie Hills rock cress

Arabis breweri var. pecuniaria

San Bernardino rock cress

Arabis cobrensis

Masonic rock cress

Arabis dispar

pinyon rock cress

Arabis fernaldiana var. stylosa

stylose rock cress

Arabis hoffmannii

Hoffmann's rock cress

Arabis johnstonii

Johnston's rock cress

Arabis microphylla var. microphylla

small-leaved rock cress

Arabis oregana

Oregon rock cress

Arabis pinzlae

Pinzl's rock cress

Arabis pulchra var. munciensis

Darwin rock cress

Arabis rigidissima var. demota

Carson Range rock cress

Arabis rigidissima var. rigidissima

Trinity Mountains rock cress

Arctostaphylos andersonii

Santa Cruz manzanita

Arctostaphylos bakeri ssp. sublaevis

The Cedars manzanita

Arctostaphylos canescens ssp. sonomensis

Sonoma manzanita

Arctostaphylos catalinae

Santa Catalina Island manzanita

Arctostaphylos confertiflora

Santa Rosa Island manzanita

Arctostaphylos gabrielensis

San Gabriel manzanita

Arctostaphylos glandulosa ssp. crassifolia

Del Mar manzanita

Arctostaphylos hispidula

Howell's manzanita

Arctostaphylos hookeri ssp. montana

Mt. Tamalpais manzanita

Arctostaphylos hooveri

Hoover's manzanita

Arctostaphylos klamathensis

Klamath manzanita

Arctostaphylos malloryi

Mallory's manzanita

Arctostaphylos manzanita ssp. laevigata

Contra Costa manzanita

Arctostaphylos mendocinoensis

pygmy manzanita

Arctostaphylos mewukka ssp. truei

True's manzanita

Arctostaphylos montaraensis

Montara manzanita

Arctostaphylos montereyensis

Monterey manzanita

Arctostaphylos nortensis

Del Norte manzanita

Arctostaphylos obispoensis

Bishop manzanita

Arctostaphylos osoensis

Oso manzanita

Arctostaphylos otayensis

Otay manzanita

Arctostaphylos pajaroensis

Pajaro manzanita

Arctostaphylos peninsularis ssp. peninsularis

Peninsular manzanita

Arctostaphylos purissima

La Purisima manzanita

Arctostaphylos rainbowensis

Rainbow manzanita

Arctostaphylos refugioensis

Refugio manzanita

Arctostaphylos regismontana

Kings Mountain manzanita

Arctostaphylos stanfordiana ssp. decumbens

Rincon manzanita

Arctostaphylos stanfordiana ssp. raichei

Raiche's manzanita

Arctostaphylos tomentosa ssp. daciticola

dacite manzanita

Arctostaphylos tomentosa ssp. eastwoodiana

Eastwood's manzanita

Arctostaphylos tomentosa ssp. insulicola

island manzanita

Arctostaphylos tomentosa ssp. subcordata

Santa Cruz Island manzanita

Arctostaphylos viridissima

white-haired manzanita

Arctostaphylos wellsii

Wells's manzanita

Arenaria macradenia var. kuschei

Forest Camp sandwort

Arenaria ursina

Big Bear Valley sandwort

Argyrochosma limitanea var. limitanea

cloak fern

Aristocapsa insignis

Indian Valley spineflower

Arnica cernua

serpentine arnica

Arnica fulgens

hillside arnica

Arnica sororia

twin arnica

Arnica spathulata

Klamath arnica

Artemisia palmeri

San Diego sagewort

Asarum marmoratum

marbled wild-ginger

Aspidotis carlotta-halliae

Carlotta Hall's lace fern

Asplenium septentrionale

northern spleenwort

Asplenium trichomanes ssp. trichomanes

maidenhair spleenwort

Aster greatae

Greata's aster

Astragalus allochrous var. playanus

playa milk-vetch

Astragalus atratus var. mensanus

Darwin Mesa milk-vetch

Astragalus bicristatus

crested milk-vetch

Astragalus cimae var. cimae

Cima milk-vetch

Astragalus clevelandii

Cleveland's milk-vetch

Astragalus deanei

Dean's milk-vetch

Astragalus douglasii var. perstrictus

Jacumba milk-vetch

Astragalus geyeri var. geyeri

Geyer's milk-vetch

Astragalus gilmanii

Gilman's milk-vetch

Astragalus inversus

Susanville milk-vetch

Astragalus lentiginosus var. antonius

San Antonio milk-vetch

Astragalus lentiginosus var. sierrae

Big Bear Valley milk-vetch

Astragalus leucolobus

Big Bear Valley woollypod

Astragalus macrodon

Salinas milk-vetch

Astragalus magdalenae var. peirsonii

Peirson's milk-vetch

Astragalus miguelensis

San Miguel Island milk-vetch

Astragalus mojavensis var. hemigyrus

curved-pod milk-vetch

Astragalus nevinii

San Clemente Island milk-vetch

Astragalus nutans

Providence Mountains milk-vetch

Astragalus oocarpus

San Diego milk-vetch

Astragalus oophorus var. lavinii

Lavin's milk-vetch

Astragalus pachypus var. jaegeri

Jaeger's milk-vetch

Astragalus platytropis

little big-pod milk-vetch

Astragalus preussii var. laxiflorus

Lancaster milk-vetch

Astragalus preussii var. preussii

Preuss's milk-vetch

Astragalus pulsiferae var. pulsiferae

Pulsifer's milk-vetch

Astragalus pulsiferae var. suksdorfii

Suksdorf's milk-vetch

Astragalus rattanii var. rattanii

Rattan's milk-vetch

Astragalus tener var. ferrisiae

Ferris's milk-vetch

Astragalus traskiae

Trask's milk-vetch

Astragalus tricarinatus

triple-ribbed milk-vetch

Astragalus umbraticus

Bald Mountain milk-vetch

Astrolepis cochisensis

scaly cloak fern

Atriplex cordulata

heartscale

Atriplex coronata var. coronata

crownscale

Atriplex coronata var. notatior

San Jacinto Valley crownscale

Atriplex coulteri

Coulter's saltbush

Atriplex depressa

brittlescale

Atriplex minuscula

lesser saltscale

Atriplex parishii

Parish's brittlescale

Atriplex serenana var. davidsonii

Davidson's saltscale

Atriplex tularensis

Bakersfield smallscale

Ayenia compacta

ayenia

Azolla mexicana

Mexican mosquito fern

Baccharis plummerae ssp. glabrata

San Simeon baccharis

Baccharis plummerae ssp. plummerae

Plummer's baccharis

Baccharis vanessae

Encinitas baccharis

Balsamorhiza hookeri var. lanata

woolly balsamroot

Balsamorhiza sericea

silky balsamroot

Berberis fremontii

Fremont barberry

Berberis pinnata ssp. insularis

island barberry

Blepharidachne kingii

King's eyelash grass

Blepharizonia plumosa ssp. plumosa

big tarplant

Bolandra californica

Sierra bolandra

Boschniakia hookeri

small groundcone

Botrychium ascendens

upswept moonwort

Botrychium crenulatum

scalloped moonwort

Botrychium lunaria

common moonwort

Botrychium minganense

Mingan moonwort

Botrychium montanum

western goblin

Botrychium pinnatum

northwestern moonwort

Bouteloua trifida

red grama

Boykinia rotundifolia

round-leaved boykinia

Brodiaea kinkiensis

San Clemente Island brodiaea

Calamagrostis bolanderi

Bolander's reed grass

Calamagrostis crassiglumis

Thurber's reed grass

Calamagrostis foliosa

leafy reed grass

Calandrinia breweri

Brewer's calandrinia

Calochortus catalinae

Catalina mariposa lily

Calochortus clavatus var. clavatus

club-haired mariposa lily

Calochortus clavatus var. gracilis

slender mariposa lily

Calochortus monanthus

single-flowered mariposa lily

Calochortus palmeri var. munzii

Munz's mariposa lily

Calochortus raichei

The Cedars fairy-lantern

Calochortus simulans

San Luis Obispo mariposa lily

Calochortus weedii var. intermedius

intermediate mariposa lily

Calycadenia hooveri

Hoover's calycadenia

Calycadenia oppositifolia

Butte County calycadenia

Calycadenia villosa

dwarf calycadenia

Calyptridium parryi var. hesseae

Santa Cruz Mountains pussypaws

Calystegia atriplicifolia ssp. buttensis

Butte County morning-glory

Calystegia collina ssp. venusta

South Coast Range morning-glory

Calystegia malacophylla var. berryi

Berry's morning-glory

Calystegia sepium ssp. binghamiae

Santa Barbara morning-glory

Calystegia subacaulis ssp. episcopalis

Cambria morning-glory

Camissonia boothii ssp. alyssoides

Pine Creek evening-primrose

Camissonia boothii ssp. boothii

Booth's evening-primrose

Camissonia guadalupensis ssp. clementina

San Clemente Island evening-primrose

Camissonia integrifolia

Kern River evening-primrose

Camissonia kernensis ssp. kernensis

Kern County evening-primrose

Camissonia lewisii

Lewis's evening-primrose

Camissonia minor

Nelson's evening-primrose

Camissonia sierrae ssp. alticola

Mono Hot Springs evening-primrose

Campanula exigua

chaparral harebell

Campanula shetleri

Castle Crags harebell

Cardamine nuttallii var. gemmata

yellow-tubered toothwort

Cardamine pachystigma var. dissectifolia

dissected-leaved toothwort

Carex comosa

bristly sedge

Carex congdonii

Congdon's sedge

Carex davyi

Davy's sedge

Carex eleocharis

spikerush sedge

Carex geyeri

Geyer's sedge

Carex gigas

Siskiyou sedge

Carex halliana

Hall's sedge

Carex hystricina

bottlebrush sedge

Carex incurviformis var. danaensis

Dana's sedge

Carex lasiocarpa

slender sedge

Carex leptalea

flaccid sedge

Carex limosa

shore sedge

Carex livida

livid sedge

Carex norvegica

Scandinavian sedge

Carex parryana var. hallii

Parry's sedge

Carex petasata

Liddon's sedge

Carex praticola

meadow sedge

Carex scoparia

pointed broom sedge

Carex sheldonii

Sheldon's sedge

Carex tiogana

Tioga Pass sedge

Carex vulpinoidea

fox sedge

Carnegiea gigantea

saguaro

Castilleja cinerea

ash-gray Indian paintbrush

Castilleja gleasonii

Mt. Gleason Indian paintbrush

Castilleja miniata ssp. elata

Siskiyou Indian paintbrush

Castilleja montigena

Heckard's Indian paintbrush

Castilleja plagiotoma

Mojave Indian paintbrush

Castilleja schizotricha

split-hair Indian paintbrush

Caulanthus amplexicaulis var. barbarae

Santa Barbara jewel-flower

Caulanthus simulans

Payson's jewel-flower

Ceanothus cyaneus

Lakeside ceanothus

Ceanothus ferrisae

Coyote ceanothus

Ceanothus foliosus var. vineatus

Vine Hill ceanothus

Ceanothus fresnensis

Fresno ceanothus

Ceanothus masonii

Mason's ceanothus

Ceanothus megacarpus var. insularis

island ceanothus

Ceanothus ophiochilus

Vail Lake ceanothus

Ceanothus sonomensis

Sonoma ceanothus

Cercocarpus betuloides var. blancheae

island mountain-mahogany

Chaenactis carphoclinia var. peirsonii

Peirson's pincushion

Chaenactis douglasii var. alpina

alpine dusty maidens

Chaenactis parishii

Parish's chaenactis

Chamaebatia australis

southern mountain misery

Chamaesyce arizonica

Arizona spurge

Chamaesyce ocellata ssp. rattanii

Stony Creek spurge

Chamaesyce platysperma

flat-seeded spurge

Cheilanthes wootonii

Wooton's lace fern

Chlorogalum pomeridianum var. minus

dwarf soaproot

Chorizanthe biloba var. immemora

San Benito spineflower

Chorizanthe blakleyi

Blakley's spineflower

Chorizanthe douglasii

Douglas's spineflower

Chorizanthe leptotheca

Peninsular spineflower

Chorizanthe orcuttiana

Orcutt's spineflower

Chorizanthe palmeri

Palmer's spineflower

Chorizanthe parryi var. fernandina

San Fernando Valley spineflower

Chorizanthe parryi var. parryi

Parry's spineflower

Chorizanthe polygonoides var. longispina

long-spined spineflower

Chorizanthe pungens var. hartwegiana

Ben Lomond spineflower

Chorizanthe robusta var. hartwegii

Scott's Valley spineflower

Chorizanthe robusta var. robusta

robust spineflower

Chorizanthe spinosa

Mojave spineflower

Chorizanthe wheeleri

Wheeler's spineflower

Chorizanthe xanti var. leucotheca

white-bracted spineflower

Chrysothamnus gramineus

Panamint rock-goldenrod

Cirsium andrewsii

Franciscan thistle

Clarkia amoena ssp. whitneyi

Whitney's farewell-to-spring

Clarkia biloba ssp. australis

Mariposa clarkia

Clarkia borealis ssp. arida

Shasta clarkia

Clarkia borealis ssp. borealis

northern clarkia

Clarkia concinna ssp. automixa

Santa Clara red ribbons

Clarkia concinna ssp. raichei

Raiche's red ribbons

Clarkia exilis

slender clarkia

Clarkia gracilis ssp. albicaulis

white-stemmed clarkia

Clarkia jolonensis

Jolon clarkia

Clarkia lewisii

Lewis's clarkia

Clarkia mildrediae

Mildred's clarkia

Clarkia mosquinii ssp. mosquinii

Mosquin's clarkia

Clarkia mosquinii ssp. xerophila

Enterprise clarkia

Clarkia rostrata

beaked clarkia

Clarkia tembloriensis ssp. calientensis

Vasek's clarkia

Clarkia virgata

Sierra clarkia

Clarkia xantiana ssp. parviflora

Kern Canyon clarkia

Claytonia lanceolata var. peirsonii

Peirson's spring beauty

Claytonia megarhiza

fell-fields claytonia

Claytonia palustris

marsh claytonia

Claytonia umbellata

Great Basin claytonia

Cochlearia officinalis var. arctica

Arctic spoonwort

Collomia diversifolia

serpentine collomia

Collomia larsenii

talus collomia

Collomia tracyi

Tracy's collomia

Comarostaphylis diversifolia ssp. diversifolia

summer holly

Condalia globosa var. pubescens

spiny abrojo

Cordylanthus eremicus ssp. eremicus

desert bird's-beak

Cordylanthus nidularius

Mt. Diablo bird's-beak

Cordylanthus orcuttianus

Orcutt's bird's-beak

Cordylanthus parviflorus

purple bird's-beak

Cordylanthus tenuis ssp. barbatus

Fresno County bird's-beak

Corethrogyne filaginifolia var. incana

San Diego sand aster

Crepis runcinata ssp. hallii

Hall's meadow hawksbeard

Cryptantha clevelandii var. dissita

serpentine cryptantha

Cryptantha clokeyi

Clokey's cryptantha

Cryptantha costata

ribbed cryptantha

Cryptantha crymophila

subalpine cryptantha

Cryptantha excavata

deep-scarred cryptantha

Cryptantha ganderi

Gander's cryptantha

Cryptantha holoptera

winged cryptantha

Cryptantha hooveri

Hoover's cryptantha

Cryptantha mariposae

Mariposa cryptantha

Cryptantha rattanii

Rattan's cryptantha

Cryptantha traskiae

Trask's cryptantha

Cryptantha tumulosa

New York Mountains cryptantha

Cupressus bakeri

Baker's cypress

Cupressus forbesii

Tecate cypress

Cupressus nootkatensis

Alaska cedar

Cymopterus deserticola

desert cymopterus