The CNPS Rare Plant Inventory is a resource for information about California’s rare plants to promote education, scientific research, conservation planning, and effective enforcement of environmental laws. The East Bay is home to more than 100 of these statewide rare plants.
Scientific Name | Notes | Rarity Ranks | Common Name |
---|---|---|---|
Acanthomintha lanceolata | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Santa Clara thornmint | |
Allium sharsmithiae | CNPS-EB: *A2 State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Sharsmith's onion | |
Amsinckia douglasiana | (historical-1938) | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Douglas' fiddleneck |
Amsinckia grandiflora | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | large-flowered fiddleneck | |
Amsinckia lunaris | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G3 CNDDB Rank: S3 | bent-flowered fiddleneck | |
Androsace elongata subsp. acuta | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5?T3T4 CNDDB Rank: S3S4 | California androsace | |
Arabis blepharophylla | CNPS-EB: *A1x State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | coast rockcress | |
Arctostaphylos auriculata | CNPS-EB: *A2 State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo manzanita | |
Arctostaphylos manzanita subsp. laevigata | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | Contra Costa manzanita | |
Arctostaphylos pallida | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FT CESA Status: CE | pallid manzanita | |
Aspidotis carlotta-halliae | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | Carlotta Hall's lace fern | |
Astragalus nuttallii var. nuttallii | (historical-1866) | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G4T4 CNDDB Rank: S4 | ocean bluff milkvetch, Nuttall's milk-vetch |
Astragalus tener var. tener | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2T1 CNDDB Rank: S1 | alkali milkvetch | |
Atriplex coronata var. coronata | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4T3 CNDDB Rank: S3 | crownscale | |
Atriplex depressa | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | brittlescale | |
Atriplex minuscula | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 | LESSER SALTSCALE | |
Balsamorhiza macrolepis | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | big-scale balsamroot | |
Blepharizonia plumosa | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1G2 CNDDB Rank: S1S2 | big tarplant | |
Calandrinia breweri | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Brewer's calandrinia | |
Calochortus pulchellus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo fairy-lantern | |
Calochortus umbellatus | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3? CNDDB Rank: S3? | Oakland star-tulip | |
Calystegia purpurata subsp. saxicola | (historical-1893) (ssp. purpur | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G4T2T3 CNDDB Rank: S2S3 | coastal bluff morning-glory |
Campanula exigua | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | chaparral harebell | |
Campanula sharsmithiae | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G1G2 CNDDB Rank: S1S2 | SHARSMITH'S HAREBELL | |
Carex comosa | CNPS-EB: *A1x State CNPS: 2B.1 Global Rank: G5 CNDDB Rank: S2 | bristly sedge | |
Castilleja ambigua subsp. ambigua | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5T4 CNDDB Rank: S3S4 | Johnny-nip | |
Caulanthus lemmonii | (formerly C. coulteri var. l.) | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G3 CNDDB Rank: S3 | Lemmon's jewelflower |
Centromadia parryi subsp. congdonii | (formerly Hemizonia p. ssp. c. | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G3T2 CNDDB Rank: S2 | Congdon's tarplant |
Chlorogalum pomeridianum var. minus | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G5T3 CNDDB Rank: S3 | DWARF SOAPROOT | |
Chloropyron maritimum subsp. palustre | (historical-1917) | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G4?T2 CNDDB Rank: S2 | Point Reyes salty bird's-beak |
Chloropyron molle subsp. hispidum | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G2T1 CNDDB Rank: S1 | hispid salty bird's-beak, hispid bird's-beak | |
Chloropyron molle subsp. molle | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2T1 CNDDB Rank: S1 FESA Status: FE CESA Status: CR | soft salty bird's-beak, soft bird's-beak | |
Chloropyron palmatum | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | palmate salty bird's-beak, palmate-bracted bird's-beak | |
Chorizanthe cuspidata var. cuspidata | (historical-1881) | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G2T1 CNDDB Rank: S1 | San Francisco Bay spineflower |
Chorizanthe robusta var. robusta | (historical-1913) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G2T1 CNDDB Rank: S1 FESA Status: FE | robust spineflower |
Cicuta maculata var. bolanderi | CNPS-EB: *A1 State CNPS: 2B.1 Global Rank: G5T4T5 CNDDB Rank: S2? | Bolander's water-hemlock, water hemlock | |
Cirsium andrewsii | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G3 CNDDB Rank: S3 | Franciscan thistle | |
Cirsium fontinale var. campylon | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G2T2 CNDDB Rank: S2 | Mount Hamilton fountain thistle | |
Clarkia breweri | CNPS-EB: *A1 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Brewer's clarkia | |
Clarkia concinna subsp. automixa | (ssp. concinna is more common) | CNPS-EB: *A2 State CNPS: 4.3 Global Rank: G5?T3 CNDDB Rank: S3 | Santa Clara red ribbons |
Clarkia franciscana | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | Presidio clarkia | |
Collomia diversifolia | CNPS-EB: *A1 State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | serpentine collomia | |
Convolvulus simulans | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | small-flowered morning-glory | |
Cordylanthus nidularius | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 CESA Status: CR | Mount Diablo bird's-beak | |
Cryptantha hooveri | (historical-1908) | CNPS-EB: *A1x State CNPS: 1A Global Rank: GH CNDDB Rank: SH | Hoover's cryptantha |
Deinandra bacigalupii | (formerly Hemizonia increscens | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 CESA Status: CE | Livermore tarplant |
Delphinium californicum subsp. interius | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G3T3 CNDDB Rank: S3 | Hospital Canyon larkspur | |
Delphinium recurvatum | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G2? CNDDB Rank: S2 | recurved larkspur | |
Dirca occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | western leatherwood | |
Eleocharis parvula | CNPS-EB: *A1 State CNPS: 4.3 Global Rank: G5 CNDDB Rank: S3 | small spikerush | |
Eriastrum ertterae | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 CESA Status: CC | Ertter's eriastrum | |
Eriogonum luteolum var. caninum | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | Tiburon buckwheat | |
Eriogonum nudum var. psychicola | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 | Antioch Dunes buckwheat | |
Eriogonum truncatum | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | Mount Diablo buckwheat | |
Eriogonum umbellatum var. bahiiforme | Previously mis-recorded as var. smallianum which does not occur in the East Bay | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5T3 CNDDB Rank: S3 | Small's sulphur flower, bay buckwheat |
Eriophyllum jepsonii | CNPS-EB: *A2 State CNPS: 4.3 Global Rank: G3 CNDDB Rank: S3 | Jepson's woolly sunflower | |
Eryngium aristulatum var. hooveri | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 | Hoover's button-celery | |
Eryngium jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
Eryngium racemosum | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 CESA Status: CE | delta button-celery | |
Eryngium spinosepalum | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
Erysimum capitatum var. angustatum | (ssp. capitatum is more common | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | Contra Costa wallflower |
Erythranthe inconspicua | CNPS-EB: *A1 State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | ||
Eschscholzia rhombipetala | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | diamond-petaled California poppy | |
Extriplex joaquinana | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | San Joaquin spearscale, San Joaquin saltbush | |
Fritillaria agrestis | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | stinkbells | |
Fritillaria falcata | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | talus fritillary | |
Fritillaria liliacea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | fragrant fritillary | |
Galium andrewsii subsp. gatense | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5T3 CNDDB Rank: S3 | phlox-leaf serpentine bedstraw, serpentine bedstraw | |
Gilia millefoliata | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | DARK-EYED GILIA | |
Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
Hesperevax caulescens | (H. sparsiflora is more common | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | hogwallow starfish |
Hesperolinon breweri | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Brewer's western flax | |
Hesperolinon tehamense | 3 questionable ID sites. Needs field research | CNPS-EB: *A1? State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Napa western flax |
Hibiscus lasiocarpos var. occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T3 CNDDB Rank: S3 | rose-mallow | |
Hoita strobilina | (historical-1865) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G2? CNDDB Rank: S2? | Loma Prieta hoita |
Holocarpha macradenia | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FT CESA Status: CE | Santa Cruz tarplant | |
Horkelia cuneata var. sericea | (historical-1894) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G4T1? CNDDB Rank: S1? | Kellogg's horkelia |
Iris longipetala | CNPS-EB: *A1 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | coast iris | |
Isocoma arguta | (historical-date unknown) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | Carquinez goldenbush |
Lasthenia conjugens | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE | Contra Costa goldfields | |
Lasthenia ferrisiae | CNPS-EB: *A1 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | Ferris' goldfields | |
Lathyrus jepsonii var. jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | delta tule pea, Delta tule pea | |
Legenere limosa | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 | legenere | |
Leptosiphon ambiguus | (formerly Linanthus a.) | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | serpentine leptosiphon, serpentine linanthus |
Leptosiphon aureus | (formerly L.acicularis, Linanthus acicularis) | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4? CNDDB Rank: S4? | bristly leptosiphon, bristly linanthus |
Leptosiphon grandiflorus | (formerly Linanthus g.) | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G3G4 CNDDB Rank: S3S4 | large-flowered leptosiphon, large-flowered linanthus |
Leptosyne hamiltonii | (formerly Coreopsis h.) | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Hamilton coreopsis |
Lessingia hololeuca | (historical-1940) | CNPS-EB: *A1x State CNPS: 3 Global Rank: G2G3 CNDDB Rank: S2S3 | woolly-headed lessingia |
Lessingia tenuis | CNPS-EB: *A2 State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | spring lessingia | |
Lilaeopsis masonii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | Mason's lilaeopsis | |
Madia radiata | (historical-1941) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G3 CNDDB Rank: S3 | showy golden madia, showy madia |
Malacothamnus hallii | (M. fasciculatus in Jepson Man | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Hall's bush-mallow |
Meconella oregana | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 | Oregon meconella | |
Micropus amphibolus | (historical - 1955) | CNPS-EB: *A1x State CNPS: 3.2 Global Rank: G3G4 CNDDB Rank: S3S4 | Mount Diablo cottonseed, Mt. Diablo cottonweed |
Microseris sylvatica | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | sylvan microseris | |
Monolopia gracilens | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G3 CNDDB Rank: S3 | woodland woollythreads, woodland monolopia | |
Myosurus minimus subsp. apus | CNPS-EB: *A1? State CNPS: 3.1 Global Rank: G5T2Q CNDDB Rank: S2 | little mousetail | |
Navarretia cotulifolia | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | cotula navarretia | |
Navarretia gowenii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | Lime Ridge navarretia | |
Navarretia heterandra | CNPS-EB: *A1 State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | Tehama navarretia | |
Navarretia nigelliformis subsp. nigelliformis | CNPS-EB: *A2? State CNPS: 4.2 Global Rank: G4T3 CNDDB Rank: S3 | adobe navarretia | |
Navarretia nigelliformis subsp. radians | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G4T2T3 CNDDB Rank: S2S3 | shining navarretia | |
Navarretia prostrata | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | prostrate vernal pool navarretia | |
Oenothera deltoides subsp. howellii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | Antioch Dunes evening-primrose | |
Perideridia gairdneri subsp. gairdneri | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G5T3T4 CNDDB Rank: S3S4 | Gairdner's yampah | |
Phacelia phacelioides | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo phacelia | |
Piperia michaelii | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | Michael's rein-orchid | |
Plagiobothrys chorisianus var. chorisianus | (historical-1890) | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G3T1Q CNDDB Rank: S1 | Choris' popcornflower |
Plagiobothrys diffusus | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G1Q CNDDB Rank: S1 CESA Status: CE | San Francisco popcornflower | |
Plagiobothrys glaber | CNPS-EB: *A1 State CNPS: 1A Global Rank: GX CNDDB Rank: SX | hairless popcornflower | |
Polemonium carneum | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G3G4 CNDDB Rank: S2 | Oregon polemonium, great polemonium | |
Polygonum marinense | CNPS-EB: *A1x State CNPS: 3.1 Global Rank: G2Q CNDDB Rank: S2 | MARIN KNOTWEED | |
Potamogeton zosteriformis | (historical-1949) | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G5 CNDDB Rank: S3 | eel-grass pondweed |
Psilocarphus brevissimus var. multiflorus | May not occur in EastBay (var. brevissimus is more common | CNPS-EB: *A1? State CNPS: 4.2 Global Rank: G4T3 CNDDB Rank: S3 | delta woolly-marbles |
Puccinellia simplex | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | little alkali grass | |
Ranunculus lobbii | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S3 | Lobb's aquatic buttercup | |
Sanicula maritima | (historical-1936) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | adobe sanicle |
Sanicula saxatilis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | rock sanicle | |
Scutellaria galericulata | (historical-1949) | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G5 CNDDB Rank: S2 | marsh skullcap |
Senecio aphanactis | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G3 CNDDB Rank: S2 | chaparral ragwort, rayless ragwort | |
Spergularia macrotheca var. longistyla | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | large-flowered sand spurry | |
Streptanthus albidus subsp. peramoenus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2T2 CNDDB Rank: S2 | most beautiful jewel-flower | |
Streptanthus hispidus | CNPS-EB: *A2 State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo jewelflower | |
Stuckenia filiformis subsp. alpina | (formerly Potamogeton f.) | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G5T5 CNDDB Rank: S2S3 | slender-leaved potamogeton |
Suaeda californica | (historical-1958) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE | California seablite |
Symphyotrichum lentum | (formerly Aster lentus) | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Suisun marsh aster |
Trifolium hydrophilum | (vars. amplectens and truncatu | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | saline clover |
Tropidocarpum capparideum | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | caper-fruited tropidocarpum | |
Viburnum ellipticum | CNPS-EB: *A2 State CNPS: 2B.3 Global Rank: G4G5 CNDDB Rank: S3 | oval-leaved viburnum | |
Wolffia brasiliensis | CNPS-EB: *A1 State CNPS: 2B.3 Global Rank: G5 CNDDB Rank: S2 | BRAZILIAN WATERMEAL |