| Scientific Name | Notes | Rarity Ranks | Common Name | Num Pops |
|---|---|---|---|---|
| Abronia latifolia | (historical-1894) | CNPS-EB: A1x | yellow sand-verbena | 0 |
| Abronia umbellata var. umbellata | (historical-1937) | CNPS-EB: A1x | beach sand-verbena | 0 |
| Acmispon denticulatus | (historical-1945) | CNPS-EB: A1x | meadow trefoil | 0 |
| Acmispon junceus var. biolettii | (historical-1945) | CNPS-EB: A1x | rush lotus | 0 |
| Allium peninsulare var. peninsulare | (historical-1954) | CNPS-EB: A1x | peninsular onion | 0 |
| Amaranthus palmeri | CNPS-EB: A1x | Palmer's amaranth | 1 | |
| Amsinckia douglasiana | (historical-1938) | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Douglas' fiddleneck | 0 |
| Anthoxanthum occidentale | (historical-198? but not seen | CNPS-EB: A1x | California sweet grass, vanilla grass | 0 |
| Arabis blepharophylla | CNPS-EB: *A1x State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | coast rockcress | 0 | |
| Arctostaphylos glandulosa subsp. cushingiana | CNPS-EB: A1x | CUSHING MANZANITA | 0 | |
| Arctostaphylos glandulosa subsp. mollis | CNPS-EB: A1x | 0 | ||
| Artemisia pycnocephala | (historical-1936) | CNPS-EB: A1x | coastal sagewort | 0 |
| Aspidotis carlotta-halliae | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | Carlotta Hall's lace fern | 0 | |
| Aspidotis densa | CNPS-EB: A1x | dense lace fern, Indian's dream | 0 | |
| 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 | 0 |
| Astragalus nuttallii var. virgatus | (historical-1881) | CNPS-EB: A1x | Nuttall's milk-vetch | 0 |
| Atriplex dioica | (formerly A. subspicata) | CNPS-EB: A1x | thickleaf orach, saltbush | 0 |
| Atriplex gmelinii var. gmelinii | (historical-1897) | CNPS-EB: A1x | Gmelin's saltbush, spear saltbush | 0 |
| Bolboschoenus fluviatilis | (formerly Scirpus f.) | CNPS-EB: A1x | river bulrush | 0 |
| Calamagrostis nutkaensis | (historical-18??) | CNPS-EB: A1x | Pacific reed grass | 0 |
| Calochortus invenustus | CNPS-EB: A1x | plain mariposa-lily | 0 | |
| 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 | 0 |
| Calystegia soldanella | (historical-1893) | CNPS-EB: A1x | beach morning-glory | 0 |
| Camissonia campestris subsp. campestris | (historical-1940) | CNPS-EB: A1x | Mojave suncup | 0 |
| Campanula sharsmithiae | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G1G2 CNDDB Rank: S1S2 | SHARSMITH'S HAREBELL | 0 | |
| Carex comosa | CNPS-EB: *A1x State CNPS: 2B.1 Global Rank: G5 CNDDB Rank: S2 | bristly sedge | 0 | |
| Caulanthus lemmonii | (formerly C. coulteri var. l.) | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G3 CNDDB Rank: S3 | Lemmon's jewelflower | 0 |
| Cercis occidentalis | CNPS-EB: A1x | western redbud | 0 | |
| 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 | 0 |
| Chorizanthe cuspidata var. cuspidata | (historical-1881) | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G2T1 CNDDB Rank: S1 | San Francisco Bay spineflower | 0 |
| Chorizanthe robusta var. robusta | (historical-1913) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G2T1 CNDDB Rank: S1 FESA Status: FE | robust spineflower | 0 |
| Chorizanthe uniaristata | (historical-1884) | CNPS-EB: A1x | one-awn spineflower | 0 |
| Cirsium occidentale var. coulteri | CNPS-EB: A1x | COULTER'S THISTLE | 0 | |
| Cirsium occidentale var. occidentale | CNPS-EB: A1x | COBWEBBY THISTLE | 0 | |
| Claytonia exigua subsp. glauca | (ssp. exigua is more common) | CNPS-EB: A1x | claytonia | 0 |
| Claytonia rubra subsp. depressa | CNPS-EB: A1x | miner's lettuce | 0 | |
| Collinsia bartsiifolia var. bartsiifolia | CNPS-EB: A1x | white Chinese houses | 0 | |
| Collinsia bartsiifolia var. davidsonii | CNPS-EB: A1x | |||
| Corallorhiza striata | (C. maculata is more common) | CNPS-EB: A1x | striped coralroot | 0 |
| Crassula solieri | (C. connata and aquatica are more common) | CNPS-EB: A1x | pygmy-weed | 0 |
| Cryptantha hooveri | (historical-1908) | CNPS-EB: *A1x State CNPS: 1A Global Rank: GH CNDDB Rank: SH | Hoover's cryptantha | 0 |
| Cryptantha muricata var. muricata | CNPS-EB: A1x | showy prickly-nut cryptantha | 0 | |
| Cryptantha nemaclada | CNPS-EB: A1x | Colusa cryptantha | 0 | |
| Cuscuta indecora var. indecora | CNPS-EB: A1x | large-seeded dodder, pretty dodder | 1 | |
| Cuscuta occidentalis | (formerly C. californica var. | CNPS-EB: A1x | California dodder | 0 |
| Cyperus odoratus | CNPS-EB: A1x | coarse cyperus | 0 | |
| Delphinium recurvatum | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G2? CNDDB Rank: S2 | recurved larkspur | 0 | |
| Descurainia pinnata subsp. brachycarpa | CNPS-EB: A1x | tansy mustard | 0 | |
| Dichelostemma multiflorum | CNPS-EB: A1x | wild hyacinth, many-flowered brodiaea | 0 | |
| Diplacus kelloggii | (formerly Mimulus kelloggii) | CNPS-EB: A1x | Kellogg's monkeyflower | 0 |
| Diplacus tricolor | (formerly Mimulus tricolor) | CNPS-EB: A1x | tricolor monkeyflower | 0 |
| Downingia bella | CNPS-EB: A1x | Hoover's downingia | 0 | |
| Downingia ornatissima var. mirabilis | (historical-1956; formerly D. ornatissima var. eximia) | CNPS-EB: A1x | Solano downingia | 0 |
| Dudleya cymosa subsp. cymosa | (ssp. paniculata is more common) | CNPS-EB: A1x | spreading dudleya | 1 |
| Eleocharis rostellata | (historical-1933) | CNPS-EB: A1x | beaked spike-rush | 0 |
| Elymus mollis subsp. mollis | CNPS-EB: A1x | American dune grass, sea lyme grass | 0 | |
| Elymus stebbinsii | CNPS-EB: A1x | Stebbins' wheat grass, Parish's wheat-grass | 0 | |
| Elymus xsaundersii | CNPS-EB: A1x | 0 | ||
| Emmenanthe rosea | (formerly E. penduliflora var. rosea) | CNPS-EB: A1x | 0 | |
| Eragrostis mexicana subsp. virescens | CNPS-EB: A1x | Orcutt's eragrostis | 0 | |
| Eriogonum deserticola | CNPS-EB: A1x | Colorado desert wild buckwheat, desert eriogonum | 0 | |
| Eriogonum nudum var. pubiflorum | CNPS-EB: A1x | Fremont's wild buckwheat, naked-stemmed buckwheat | 0 | |
| Eryngium racemosum | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 CESA Status: CE | delta button-celery | 0 | |
| Erythranthe laciniata | (formerly Mimulus laciniatus) | CNPS-EB: *A1x State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | CUT-LEAVED MONKEYFLOWER | 0 |
| Erythranthe microphylla | CNPS-EB: A1x | 0 | ||
| Extriplex californica | (historical-1921) | CNPS-EB: A1x | California orach, California saltbush | 0 |
| Garrya congdonii | CNPS-EB: A1x | Congdon's silk-tassel | 0 | |
| Garrya fremontii | CNPS-EB: A1x | silk tassel bush | 0 | |
| Gilia millefoliata | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | DARK-EYED GILIA | 0 | |
| Hesperevax acaulis var. ambusticola | (H. sparsiflora is more common | CNPS-EB: A1x | fire evax | 0 |
| Hesperomecon linearis | (formerly Meconella l.) (hist | CNPS-EB: A1x | narrow-leaved meconella | 0 |
| Heterotheca sessiliflora var. bolanderioides | CNPS-EB: A1x | golden aster | 0 | |
| Hoita orbicularis | (historical-1936) | CNPS-EB: A1x | round-leaved psoralea | 0 |
| Hoita strobilina | (historical-1865) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G2? CNDDB Rank: S2? | Loma Prieta hoita | 0 |
| Horkelia cuneata var. sericea | (historical-1894) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G4T1? CNDDB Rank: S1? | Kellogg's horkelia | 0 |
| Hypericum scouleri | CNPS-EB: A1x | Scouler's st. john's wort, Scouler's St. John's wort | 0 | |
| Isocoma arguta | (historical-date unknown) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | Carquinez goldenbush | 0 |
| Juncus articulatus subsp. articulatus | CNPS-EB: A1x | jointed rush | 0 | |
| Juncus bufonius var. occidentalis | (historical-1895) (vars. bufon | CNPS-EB: A1x | western toad rush, toad rush | 0 |
| Juncus dubius | CNPS-EB: A1x | mariposa rush, Mariposa rush | 0 | |
| Lasthenia maritima | CNPS-EB: A1x | maritime goldfields, seaside goldfields, Farallon weed | 0 | |
| Layia glandulosa | (historical-1983 but not seen | CNPS-EB: A1x | white layia | 0 |
| Lepidium oblongum | (historical-1937) | CNPS-EB: A1x | wayside pepper-grass | 0 |
| Lepidospartum squamatum | (historical-1933) | CNPS-EB: A1x | California broom-shrub | 0 |
| Leptosiphon grandiflorus | (formerly Linanthus g.) | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G3G4 CNDDB Rank: S3S4 | large-flowered leptosiphon, large-flowered linanthus | 0 |
| Leptosyne stillmanii | (formerly Coreopsis s.) | CNPS-EB: A1x | Stillman's coreopsis | 0 |
| Lessingia hololeuca | (historical-1940) | CNPS-EB: *A1x State CNPS: 3 Global Rank: G2G3 CNDDB Rank: S2S3 | woolly-headed lessingia | 0 |
| Lessingia nana | CNPS-EB: A1x | dwarf lessingia | 0 | |
| Limnanthes douglasii subsp. nivea | CNPS-EB: A1x | meadowfoam | 0 | |
| Limnanthes douglasii subsp. rosea | CNPS-EB: A1x | meadowfoam | 0 | |
| Limosella aquatica | CNPS-EB: A1x | northern mudwort | 0 | |
| Linum lewisii var. lewisii | (historical-1936) | CNPS-EB: A1x | western blue flax | 0 |
| Lithophragma cymbalaria | (historical-1895) | CNPS-EB: A1x | mission star | 0 |
| Ludwigia palustris | CNPS-EB: A1x | American marsh purslane | 0 | |
| Lupinus benthamii | (historical-1955) | CNPS-EB: A1x | spider lupine | 0 |
| Lupinus chamissonis | (historical-1963) | CNPS-EB: A1x | Chamisso's bush lupine | 0 |
| Lupinus luteolus | CNPS-EB: A1x | butter lupine | 0 | |
| Madia anomala | CNPS-EB: A1x | plump-seeded madia | 0 | |
| Madia radiata | (historical-1941) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G3 CNDDB Rank: S3 | showy golden madia, showy madia | 0 |
| Malacothrix californica | (historical-1895) | CNPS-EB: A1x | California malacothrix | 0 |
| Matricaria occidentalis | (formerly Chamomilla o.) (hist | CNPS-EB: A1x | valley mayweed, valley pineapple weed | 0 |
| Meconella californica | CNPS-EB: A1x | California meconella | 0 | |
| Mentzelia laevicaulis var. laevicaulis | (historical-1969) | CNPS-EB: A1x | blazing star | 0 |
| Mentzelia pectinata | (historical-1935) | CNPS-EB: A1x | San Joaquin blazing star | 0 |
| Micropus amphibolus | (historical - 1955) | CNPS-EB: *A1x State CNPS: 3.2 Global Rank: G3G4 CNDDB Rank: S3S4 | Mount Diablo cottonseed, Mt. Diablo cottonweed | 0 |
| Microseris bigelovii | (historical-1891) | CNPS-EB: A1x | coast microseris | 0 |
| Monardella breweri subsp. breweri | (historical-1868) | CNPS-EB: A1x | Brewer's monardella | 0 |
| Montia linearis | (historical-1933) | CNPS-EB: A1x | linear-leaved montia | 0 |
| Myosotis laxa | CNPS-EB: A1x | BAY FORGET-ME-NOT | 1 | |
| Navarretia tagetina | (historical-1927) | CNPS-EB: A1x | marigold navarretia | 0 |
| Perideridia gairdneri subsp. gairdneri | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G5T3T4 CNDDB Rank: S3S4 | Gairdner's yampah | 0 | |
| Phacelia egena | (historical-1956) | CNPS-EB: A1x | phacelia | 0 |
| Phalaris angusta | (historical-1912) | CNPS-EB: A1x | narrow canary grass | 0 |
| Phalaris californica | (historical-1943) | CNPS-EB: A1x | California canary grass | 0 |
| Phyla lanceolata | CNPS-EB: A1x | fog-fruit | 0 | |
| Plagiobothrys chorisianus var. chorisianus | (historical-1890) | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G3T1Q CNDDB Rank: S1 | Choris' popcornflower | 0 |
| Plagiobothrys diffusus | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G1Q CNDDB Rank: S1 CESA Status: CE | San Francisco popcornflower | 0 | |
| Plagiobothrys infectivus | CNPS-EB: A1x | dye popcornflower | 0 | |
| Platanthera dilatata var. leucostachys | (formerly P. l.) (historical-1 | CNPS-EB: A1x | white-flowered bog-orchid | 0 |
| Plectritis congesta subsp. congesta | CNPS-EB: A1x | sea blush | 0 | |
| Poa douglasii | (historical-1882) | CNPS-EB: A1x | sanddune bluegrass | 0 |
| Pogogyne douglasii | (historical-1940) | CNPS-EB: A1x | Douglas' beardstyle, Douglas pogogyne | 0 |
| Polemonium carneum | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G3G4 CNDDB Rank: S2 | Oregon polemonium, great polemonium | 0 | |
| Polygonum marinense | CNPS-EB: *A1x State CNPS: 3.1 Global Rank: G2Q CNDDB Rank: S2 | MARIN KNOTWEED | 0 | |
| Polystichum imbricans subsp. imbricans | CNPS-EB: A1x | rock sword fern | 0 | |
| Potamogeton zosteriformis | (historical-1949) | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G5 CNDDB Rank: S3 | eel-grass pondweed | 0 |
| Primula clevelandii var. gracilis | (ssp. patulum is more common) | CNPS-EB: A1x | Padre's shooting star | 0 |
| Prosartes smithii | (formerly Disporum s.)(P. | CNPS-EB: A1x | large-flowered fairy bell | 0 |
| Puccinellia nutkaensis | CNPS-EB: A1x | Alaska alkali grass | 0 | |
| Quercus garryana x dumosa | CNPS-EB: A1x | Oregon oak x scrub oak | 0 | |
| Ranunculus orthorhynchus var. bloomeri | CNPS-EB: A1x | Bloomer's buttercup | 0 | |
| Ranunculus orthorhynchus var. orthorhynchus | (historical-1895) | CNPS-EB: A1x | straight-beaked buttercup | 0 |
| Rubus spectabilis | CNPS-EB: A1x | salmonberry | 0 | |
| Salix breweri | CNPS-EB: A1x | Brewer's willow | 0 | |
| Salix melanopsis | CNPS-EB: A1x | dusky willow | 0 | |
| Salvia carduacea | (historical-1946) | CNPS-EB: A1x | thistle sage | 0 |
| Sanicula arctopoides | CNPS-EB: A1x | footsteps of spring, yellow mats | 0 | |
| Sanicula maritima | (historical-1936) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | adobe sanicle | 0 |
| Schoenoplectus tabernaemontani | CNPS-EB: A1x | SOFT-STEM BULRUSH | 0 | |
| Scoliopus bigelovii | (historical-1900) | CNPS-EB: A1x | fetid adder's tongue, slink pod | 0 |
| Scutellaria galericulata | (historical-1949) | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G5 CNDDB Rank: S2 | marsh skullcap | 0 |
| Senecio aphanactis | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G3 CNDDB Rank: S2 | chaparral ragwort, rayless ragwort | 0 | |
| Spiranthes porrifolia | CNPS-EB: A1x | western ladies' tresses | 0 | |
| Stuckenia filiformis subsp. alpina | (formerly Potamogeton f.) | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G5T5 CNDDB Rank: S2S3 | slender-leaved potamogeton | 0 |
| Suaeda californica | (historical-1958) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE | California seablite | 0 |
| Symphyotrichum frondosum | (historical-1958) | CNPS-EB: A1x | short-rayed alkali aster | 0 |
| Thermopsis californica var. californica | (historical-1929) | CNPS-EB: A1x | santa ynez false-lupine, false-lupine | 0 |
| Tolmiea diplomenziesii | CNPS-EB: A1x | pig-a-back plant | 0 | |
| Torreyochloa pallida var. pauciflora | CNPS-EB: A1x | weak manna grass | 0 | |
| Trianthema portulacastrum | CNPS-EB: A1x | horse purslane | 0 | |
| Vancouveria planipetala | (historical-1898) | CNPS-EB: A1x | redwood ivy, inside-out flower | 0 |
| Zeltnera trichantha | (formerly Centaurium tricanthu | CNPS-EB: A1x | alkali centaury | 0 |