| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Amelanchier utahensis | CNPS-EB: C | Utah service-berry | |
| Dirca occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | western leatherwood | |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Acaena californica | (formerly A. pinnatifida var. californica) | CNPS-EB: C | California acaena |
| Agoseris heterophylla var. heterophylla | CNPS-EB: C | ||
| Alnus rubra | (A. rhombifolia is more common | CNPS-EB: A2 | red alder |
| 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 | |
| Apiastrum angustifolium | CNPS-EB: C | wild celery | |
| Carex densa | CNPS-EB: B | dense sedge | |
| Carex gracilior | CNPS-EB: A1 | slender sedge | |
| Castilleja exserta subsp. latifolia | CNPS-EB: A1 | owl's-clover | |
| Castilleja subinclusa subsp. franciscana | CNPS-EB: A1 | Franciscan indian paintbrush | |
| Castilleja wightii | CNPS-EB: B | Wight's indian paintbrush | |
| Ceanothus thyrsiflorus var. thyrsiflorus | CNPS-EB: B | blue blossom, California lilac | |
| Cirsium brevistylum | CNPS-EB: B | indian thistle | |
| Cirsium quercetorum | CNPS-EB: A2 | brownie thistle | |
| Cirsium remotifolium var. odontolepis | CNPS-EB: A1 | remote-leaved thistle | |
| Clarkia purpurea subsp. viminea | (ssp. quadrivulnera more common | CNPS-EB: A1 | large godetia |
| Danthonia californica | CNPS-EB: C | California oat grass | |
| Dudleya farinosa | CNPS-EB: A2 | bluff lettuce, powdery dudleya | |
| Equisetum laevigatum | CNPS-EB: A2 | smooth scouring rush | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Eriogonum luteolum var. caninum | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | Tiburon buckwheat | |
| Festuca californica | CNPS-EB: C | California fescue | |
| Fritillaria liliacea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | fragrant fritillary | |
| Galium triflorum | CNPS-EB: C | sweet-scented bedstraw | |
| Gilia capitata subsp. staminea | CNPS-EB: C | blue field gilia | |
| Heterotheca sessiliflora subsp. bolanderi | (H. s. ssp. echioides is more | CNPS-EB: C | Bolander goldenaster |
| Hordeum brachyantherum subsp. californicum | (ssp. brachyantherum is more common | CNPS-EB: A2 | California barley |
| Iris longipetala | CNPS-EB: *A1 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | coast iris | |
| Lasthenia glabrata subsp. glabrata | CNPS-EB: A2 | yellow-ray goldfields | |
| Layia gaillardioides | CNPS-EB: A2 | woodland layia | |
| Layia hieracioides | CNPS-EB: C | tall layia | |
| Ligusticum apiifolium | CNPS-EB: A2 | Pacific lovage | |
| Lupinus affinis | CNPS-EB: A1 | lupine | |
| Meconella californica | CNPS-EB: A1x | California 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 douglasii subsp. tenella | (subsp douglasii is more common) | CNPS-EB: A2 | silver puffs |
| Morella californica | (formerly Myrica c.) | CNPS-EB: B | wax myrtle |
| Pentachaeta alsinoides | CNPS-EB: C | tiny pentachaeta | |
| Phacelia divaricata | CNPS-EB: B | divaricate phacelia | |
| Phacelia ramosissima | CNPS-EB: B | branching phacelia | |
| Phalaris californica | (historical-1943) | CNPS-EB: A1x | California canary grass |
| Pinus attenuata | CNPS-EB: A1 | knobcone pine | |
| Piperia elegans subsp. elegans | CNPS-EB: C | coast piperia, elegant piperia | |
| Poa howellii | CNPS-EB: A2 | Howell's bluegrass | |
| Pseudognaphalium microcephalum | (formerly Gnaphalium canescens | CNPS-EB: A1 | white everlasting |
| Psilocarphus chilensis | (formerly P. tenellus var. glo | CNPS-EB: A1 | round woolly marbles, round woolly-marbles |
| Ranunculus lobbii | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S3 | Lobb's aquatic buttercup | |
| Rosa spithamea | CNPS-EB: C | coast ground rose, ground rose | |
| Rumex transitorius | CNPS-EB: B | willow dock | |
| Salix scouleriana | CNPS-EB: A2 | Scouler's willow | |
| Senecio aronicoides | CNPS-EB: C | rayless ragwort, California butterweed | |
| Senecio hydrophilus | CNPS-EB: A2 | water ragwort, alkali-marsh ragwort, alkali-marsh butterweed | |
| Silene laciniata subsp. californica | (formerly Silene c.) | CNPS-EB: C | Indian pink, California pink, California Indian pink |
| Stephanomeria elata | CNPS-EB: A1 | stephanomeria | |
| Stipa cernua | CNPS-EB: C | nodding needlegrass | |
| Streptanthus albidus subsp. peramoenus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2T2 CNDDB Rank: S2 | most beautiful jewel-flower | |
| Tellima grandiflora | CNPS-EB: C | fringe cups | |
| Tetrapteron graciliflorum | CNPS-EB: C | hill sun cup | |
| Trifolium barbigerum | CNPS-EB: A2 | bearded clover | |
| Trifolium oliganthum | CNPS-EB: C | few-flowered clover | |
| Trifolium olivaceum | CNPS-EB: C | olive clover | |
| Trifolium wormskioldii | CNPS-EB: A1 | cow clover | |
| Triodanis biflora | CNPS-EB: A2 | Venus' looking-glass | |
| Trisetum canescens | CNPS-EB: A2 | tall trisetum | |
| Turritis glabra | CNPS-EB: B | tower mustard |