| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Alisma triviale | (formerly A. plantago-aquatica | CNPS-EB: C | water plantain |
| Allophyllum gilioides subsp. gilioides | CNPS-EB: A2 | straggling gilia | |
| Amsinckia lunaris | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G3 CNDDB Rank: S3 | bent-flowered fiddleneck | |
| Amsinckia lycopsoides | CNPS-EB: C | bugloss-flowered fiddleneck, bugloss fiddleneck | |
| Aphyllon purpureum | CNPS-EB: C | naked broomrape | |
| Aphyllon vallicola | CNPS-EB: B | California broom-rape | |
| Arbutus menziesii | CNPS-EB: B | Pacific madrone | |
| Arctostaphylos crustacea subsp. crustacea | CNPS-EB: C | brittleleaf manzanita | |
| Arctostaphylos crustacea subsp. rosei | CNPS-EB: A1 | Rose's manzanita | |
| Asclepias speciosa | (A. californica is more common | CNPS-EB: B | showy milkweed, milkweed |
| Calochortus umbellatus | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3? CNDDB Rank: S3? | Oakland star-tulip | |
| Camissonia contorta | CNPS-EB: C | contorted primrose | |
| Camissoniopsis intermedia | CNPS-EB: C | small primrose | |
| Camissoniopsis micrantha | CNPS-EB: C | small primrose | |
| 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 |
| Clarkia concinna subsp. concinna | CNPS-EB: C | large godetia | |
| Claytonia exigua subsp. exigua | CNPS-EB: C | common montia | |
| Crocanthemum scoparium var. vulgare | (formerly Helianthemum scoparium var. vulgare) | CNPS-EB: B | peak rush-rose |
| Cryptantha microstachys | CNPS-EB: A2 | Tejon cryptantha | |
| Delphinium nudicaule | CNPS-EB: C | red larkspur, orange larkspur | |
| Erythranthe nasuta | CNPS-EB: B | shy monkeyflower | |
| Festuca californica | CNPS-EB: C | California fescue | |
| Festuca octoflora | CNPS-EB: A2 | sixweeks grass, slender fescue | |
| Festuca rubra | CNPS-EB: C | red fescue | |
| Garrya elliptica | CNPS-EB: B | silk tassel bush | |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Heterotheca sessiliflora subsp. bolanderi | (H. s. ssp. echioides is more | CNPS-EB: C | Bolander goldenaster |
| Horkelia californica var. frondosa | CNPS-EB: B | leafy horkelia | |
| Layia gaillardioides | CNPS-EB: A2 | woodland layia | |
| Layia platyglossa | CNPS-EB: B | tidy-tips | |
| Leptosiphon pygmaeus subsp. continentalis | (formerly Linanthus p. ssp. c. | CNPS-EB: B | pygmy linanthus, pygmy leptosiphon |
| Madia exigua | CNPS-EB: C | ||
| Melica californica | CNPS-EB: C | California melic | |
| Navarretia mellita | CNPS-EB: C | honey-scented navarretia | |
| Pentachaeta alsinoides | CNPS-EB: C | tiny pentachaeta | |
| Piperia elegans subsp. elegans | CNPS-EB: C | coast piperia, elegant piperia | |
| Plagiobothrys canescens var. canescens | CNPS-EB: C | valley popcornflower | |
| Plagiobothrys tenellus | CNPS-EB: B | Pacific popcornflower, slender popcornflower | |
| Platanus racemosa | CNPS-EB: C | western sycamore, California sycamore | |
| Quercus berberidifolia | CNPS-EB: C | scrub oak | |
| Rhamnus crocea | CNPS-EB: C | spiny redberry | |
| Ribes divaricatum var. pubiflorum | CNPS-EB: C | straggle bush, straggly gooseberry | |
| Ribes malvaceum var. malvaceum | CNPS-EB: C | chaparral currant | |
| Rorippa palustris subsp. palustris | CNPS-EB: B | marsh yellow-cress | |
| Sagina decumbens subsp. occidentalis | (S. apetala is more common) | CNPS-EB: B | western pearlwort |
| Scutellaria tuberosa | CNPS-EB: C | Dannie's skullcap | |
| Sedella pentandra | (formorely Parvisedum pentandr | CNPS-EB: A1 | Mount Hamilton sedella |
| Sedum spathulifolium | CNPS-EB: B | broadleaf stonecrop, Pacific stonecrop | |
| Senecio aronicoides | CNPS-EB: C | rayless ragwort, California butterweed | |
| Stipa pulchra | CNPS-EB: C | purple needlegrass | |
| Trifolium oliganthum | CNPS-EB: C | few-flowered clover | |
| Triglochin scilloides | CNPS-EB: C | flowering-quillwort | |
| Trillium ovatum subsp. ovatum | CNPS-EB: A2 | white trillium | |
| Tropidocarpum gracile | CNPS-EB: B | slender tropidocarpum | |
| Turritis glabra | CNPS-EB: B | tower mustard | |
| Wyethia glabra | (W. helenioides is more common | CNPS-EB: C | mule ears |
| Acaena californica | (formerly A. pinnatifida var. californica) | CNPS-EB: C | California acaena |
| Agoseris heterophylla var. heterophylla | CNPS-EB: C | ||
| Amelanchier utahensis | CNPS-EB: C | Utah service-berry | |
| Apocynum androsaemifolium | CNPS-EB: A2 | bitter dogbane, dogbane | |
| Arctostaphylos glandulosa subsp. glandulosa | CNPS-EB: B | Eastwood manzanita | |
| Arctostaphylos glauca | CNPS-EB: C | big-berried manzanita | |
| Arctostaphylos manzanita subsp. manzanita | CNPS-EB: A2 | common manzanita | |
| Calystegia malacophylla subsp. pedicellata | CNPS-EB: A2 | woolly morning-glory | |
| Castilleja rubicundula subsp. lithospermoides | CNPS-EB: B | cream sacs | |
| Corallorhiza maculata var. maculata | (forma immaculata is more comm | CNPS-EB: A2 | spotted coralroot |
| Cordylanthus pilosus subsp. pilosus | CNPS-EB: B | hairy bird's-beak | |
| Corethrogyne filaginifolia | (formerly Lessingia f. var. f. | CNPS-EB: C | California aster |
| Cornus sericea subsp. occidentalis | CNPS-EB: C | western dogwood | |
| Datisca glomerata | CNPS-EB: C | durango root | |
| Delphinium variegatum subsp. variegatum | CNPS-EB: C | royal larkspur | |
| Ehrendorferia chrysantha | (formerly Dicentra chrysantha) | CNPS-EB: B | golden ear-drops |
| Elymus multisetus | CNPS-EB: C | big squirreltail | |
| Elymus trachycaulus subsp. trachycaulus | CNPS-EB: A1 | slender wheat grass | |
| Erigeron petrophilus var. petrophilus | CNPS-EB: B | rock daisy | |
| Eriogonum luteolum var. caninum | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | Tiburon buckwheat | |
| Eriophyllum lanatum var. achilleoides | CNPS-EB: C | woolly sunflower | |
| Euphorbia ocellata subsp. ocellata | CNPS-EB: B | valley spurge | |
| Helianthella californica var. californica | CNPS-EB: A2 | California helianthella | |
| Hemizonia congesta subsp. lutescens | CNPS-EB: B | hayfield tarweed | |
| Koeleria macrantha | CNPS-EB: C | june grass | |
| Lasthenia glabrata subsp. glabrata | CNPS-EB: A2 | yellow-ray goldfields | |
| Montia linearis | (historical-1933) | CNPS-EB: A1x | linear-leaved montia |
| Navarretia pubescens | CNPS-EB: C | downy navarretia | |
| Nemophila parviflora var. parviflora | CNPS-EB: B | small-flowered nemophila | |
| Papaver californicum | CNPS-EB: B | fire poppy | |
| Pediomelum californicum | CNPS-EB: A2 | indian breadroot | |
| Phacelia divaricata | CNPS-EB: B | divaricate phacelia | |
| Phalaris arundinacea | CNPS-EB: A1 | reed canary grass | |
| Phoradendron leucarpum subsp. macrophyllum | (formerly P. serotinum subsp. macrophyllum, P. macrophyllum) | CNPS-EB: C | big leaf mistletoe |
| Poa howellii | CNPS-EB: A2 | Howell's bluegrass | |
| Prunus emarginata | CNPS-EB: C | bitter cherry | |
| Quercus garryana var. garryana | CNPS-EB: B | Oregon oak | |
| Quercus lobata | CNPS-EB: B | valley oak, roble | |
| Quercus wislizeni var. frutescens | CNPS-EB: C | shrubby interior live oak | |
| Quercus xchasei | CNPS-EB: B | Chase oak | |
| Quercus xjolonensis | CNPS-EB: A1? | blue oak x valley oak | |
| Ranunculus occidentalis var. occidentalis | CNPS-EB: B | western buttercup | |
| Stellaria nitens | CNPS-EB: C | shining chickweed | |
| Stipa lepida | CNPS-EB: C | foothill needlegrass | |
| Streptanthus albidus subsp. peramoenus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2T2 CNDDB Rank: S2 | most beautiful jewel-flower | |
| Trifolium obtusiflorum | CNPS-EB: B | clammy clover, creek clover |