| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Agrostis hallii | CNPS-EB: A2 | Hall's bent grass | |
| Amsinckia lycopsoides | CNPS-EB: C | bugloss-flowered fiddleneck, bugloss fiddleneck | |
| Asclepias cordifolia | (A. californica is more common | CNPS-EB: A1 | purple milkweed |
| Astragalus asymmetricus | CNPS-EB: C | San Joaquin locoweeed | |
| Calochortus pulchellus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo fairy-lantern | |
| Ceanothus thyrsiflorus var. thyrsiflorus | CNPS-EB: B | blue blossom, California lilac | |
| Clarkia biloba subsp. biloba | CNPS-EB: A2 | lobed godetia | |
| Cuscuta subinclusa | CNPS-EB: C | canyon dodder | |
| Danthonia californica | CNPS-EB: C | California oat grass | |
| Eryngium jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Madia exigua | CNPS-EB: C | ||
| Nemophila parviflora var. parviflora | CNPS-EB: B | small-flowered nemophila | |
| Phragmites australis | CNPS-EB: C | common reed | |
| Prunus ilicifolia subsp. ilicifolia | CNPS-EB: B | islay, holly-leafed cherry | |
| Pseudognaphalium beneolens | (formerly Gnaphalium canescens | CNPS-EB: C | fragrant everlasting |
| Quercus garryana var. garryana | CNPS-EB: B | Oregon oak | |
| Quercus lobata | CNPS-EB: B | valley oak, roble | |
| Stipa lepida | CNPS-EB: C | foothill needlegrass | |
| Stipa pulchra | CNPS-EB: C | purple needlegrass | |
| Trifolium oliganthum | CNPS-EB: C | few-flowered clover | |
| Agoseris heterophylla var. unknown | Agoseris heterophylla split into 2 vars. in 2011 Jepson Manual, need field work to resolve vars. | CNPS-EB: B? | annual agoseris |
| Agoseris retrorsa | CNPS-EB: A2 | spear-leaved agoseris | |
| Anisocarpus madioides | (formerly Madia m.) | CNPS-EB: B | woodland tarweed, woodland madia |
| Calandrinia breweri | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Brewer's calandrinia | |
| Castilleja rubicundula subsp. lithospermoides | CNPS-EB: B | cream sacs | |
| Cephalanthus occidentalis | CNPS-EB: A2 | button bush | |
| Clarkia purpurea subsp. viminea | (ssp. quadrivulnera more common | CNPS-EB: A1 | large godetia |
| Crassula aquatica | CNPS-EB: B | water pygmy-weed | |
| Crocanthemum scoparium var. vulgare | (formerly Helianthemum scoparium var. vulgare) | CNPS-EB: B | peak rush-rose |
| Cuscuta pacifica var. pacifica | (formerly C. salina var. major) | CNPS-EB: C | salt-marsh dodder |
| Deschampsia danthonioides | CNPS-EB: C | annual hair grass | |
| Dirca occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | western leatherwood | |
| Elymus multisetus | CNPS-EB: C | big squirreltail | |
| Equisetum laevigatum | CNPS-EB: A2 | smooth scouring rush | |
| Galium trifidum subsp. columbianum | CNPS-EB: A1 | trifid bedstraw | |
| Gilia tricolor subsp. diffusa | CNPS-EB: C | birds-eye gilia | |
| Hemizonia congesta subsp. lutescens | CNPS-EB: B | hayfield tarweed | |
| Hordeum brachyantherum subsp. californicum | (ssp. brachyantherum is more common | CNPS-EB: A2 | California barley |
| Hordeum jubatum subsp. jubatum | CNPS-EB: A2 | foxtail barley, squirreltail barley | |
| Horkelia californica var. frondosa | CNPS-EB: B | leafy horkelia | |
| Isocoma arguta | (historical-date unknown) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | Carquinez goldenbush |
| Koeleria macrantha | CNPS-EB: C | june grass | |
| Lathyrus jepsonii var. californicus | CNPS-EB: B | buff pea | |
| Lathyrus jepsonii var. jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | delta tule pea, Delta tule pea | |
| Layia platyglossa | CNPS-EB: B | tidy-tips | |
| Lepidium oxycarpum | CNPS-EB: A2 | sharp-podded pepper-grass | |
| Lupinus luteolus | CNPS-EB: A1x | butter lupine | |
| Melica californica | CNPS-EB: C | California melic | |
| Microseris elegans | CNPS-EB: A1 | elegant microseris | |
| Navarretia mellita | CNPS-EB: C | honey-scented navarretia | |
| Nemophila pedunculata | CNPS-EB: B | meadow nemophila | |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Papaver californicum | CNPS-EB: B | fire poppy | |
| Perideridia oregana | CNPS-EB: A2 | yampah | |
| Phacelia tanacetifolia | CNPS-EB: B | tansy phacelia | |
| Polypodium scouleri | CNPS-EB: A1 | leather-leaf fern | |
| Ranunculus canus var. canus | CNPS-EB: C | Sacramento Valley buttercup | |
| Rosa spithamea | CNPS-EB: C | coast ground rose, ground rose | |
| Sagina decumbens subsp. occidentalis | (S. apetala is more common) | CNPS-EB: B | western pearlwort |
| Scutellaria tuberosa | CNPS-EB: C | Dannie's skullcap | |
| Stellaria nitens | CNPS-EB: C | shining chickweed | |
| Wyethia glabra | (W. helenioides is more common | CNPS-EB: C | mule ears |