| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Centromadia parryi subsp. congdonii | (formerly Hemizonia p. ssp. c. | CNPS-EB: *A2 State CNPS: 1B.1 | Congdon's tarplant |
| Astragalus tener var. tener | CNPS-EB: *A2 State CNPS: 1B.2 | alkali milkvetch | |
| Lasthenia conjugens | CNPS-EB: *A2 State CNPS: 1B.1 FESA Status: FE | Contra Costa goldfields | |
| Lasthenia fremontii | CNPS-EB: A1 | Fremont's goldfields | |
| Matricaria occidentalis | (formerly Chamomilla o.) (hist | CNPS-EB: A1x | valley mayweed, valley pineapple weed |
| Plagiobothrys glaber | CNPS-EB: *A1 State CNPS: 1A | hairless popcornflower | |
| Pogogyne douglasii | (historical-1940) | CNPS-EB: A1x | Douglas' beardstyle, Douglas pogogyne |
| Spergularia macrotheca var. macrotheca | CNPS-EB: A2 | large-flowered sand spurry | |
| Stachys ajugoides | (var. rigida is more common) | CNPS-EB: A2 | bugle hedge nettle |
| Downingia pulchella | CNPS-EB: B-PV | flat-faced downingia | |
| Muilla maritima | CNPS-EB: B-PV | common muilla | |
| Myosurus minimus subsp. minimus | CNPS-EB: B-PV | common mouse-tail | |
| Phacelia ciliata | CNPS-EB: B | Great Valley phacelia, Great Valley phacelia | |
| Plantago elongata | CNPS-EB: B-PV | annual coast plantain | |
| Psilocarphus brevissimus var. brevissimus | CNPS-EB: B | dwarf woollyheads, dwarf woolly-marbles |