| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Allium amplectens | CNPS-EB: A2 | narrow-leaved onion | |
| Calochortus splendens | CNPS-EB: A2 | splendid mariposa-lily | |
| Ericameria arborescens | CNPS-EB: B-PV | golden-fleece | |
| Eriogonum luteolum var. luteolum | CNPS-EB: A2 | golden-carpet wild buckwheat, golden carpet | |
| 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 |
| Eryngium jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
| Piperia elongata | CNPS-EB: C | chaparral orchid, wood rein-orchid, elongate piperia | |
| Thysanocarpus radians | CNPS-EB: A1 | ribbed fringe pod | |
| Triglochin scilloides | CNPS-EB: C | flowering-quillwort | |
| Arctostaphylos auriculata | CNPS-EB: *A2 State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo manzanita | |
| Claytonia exigua subsp. glauca | (ssp. exigua is more common) | CNPS-EB: A1x | claytonia |
| Collinsia sparsiflora var. sparsiflora | CNPS-EB: C | few-flowered blue-eyed Mary | |
| Gutierrezia californica | CNPS-EB: B-PV | California matchweed | |
| Hesperolinon breweri | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Brewer's western flax | |
| Leptosiphon pygmaeus subsp. continentalis | (formerly Linanthus p. ssp. c. | CNPS-EB: B | pygmy linanthus, pygmy leptosiphon |
| Viburnum ellipticum | CNPS-EB: *A2 State CNPS: 2B.3 Global Rank: G4G5 CNDDB Rank: S3 | oval-leaved viburnum |