| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Amsinckia lycopsoides | CNPS-EB: C | bugloss-flowered fiddleneck, bugloss fiddleneck | |
| Anemopsis californica | CNPS-EB: B | yerba mansa, lizard tail | |
| Camissonia contorta | CNPS-EB: C | contorted 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 |
| Croton californicus | CNPS-EB: A2 | California croton | |
| Cucurbita foetidissima | CNPS-EB: A1 | buffalo gourd, calabazilla, calabazilla | |
| Deinandra kelloggii | (formerly Hemizonia k.) | CNPS-EB: A2 | Kellogg's tarweed |
| Gilia capitata subsp. staminea | CNPS-EB: C | blue field gilia | |
| Juncus lescurii | CNPS-EB: A1 | San Francisco rush, salt rush | |
| Leptochloa fusca subsp. uninervia | CNPS-EB: A1 | mexican sprangletop, dense-flowered sprangle-top | |
| Oenothera deltoides subsp. cognata | CNPS-EB: A2 | desert evening-primrose | |
| Oenothera deltoides subsp. howellii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | Antioch Dunes evening-primrose | |
| Acmispon strigosus | CNPS-EB: B | strigose trefoil | |
| Collinsia bartsiifolia var. bartsiifolia | CNPS-EB: A1x | white Chinese houses | |
| Delphinium parryi subsp. parryi | CNPS-EB: A2 | Parry's larkspur | |
| Eragrostis mexicana subsp. virescens | CNPS-EB: A1x | Orcutt's eragrostis | |
| Layia glandulosa | (historical-1983 but not seen | CNPS-EB: A1x | white layia |
| Lupinus chamissonis | (historical-1963) | CNPS-EB: A1x | Chamisso's bush lupine |
| Phacelia ciliata | CNPS-EB: B | Great Valley phacelia, Great Valley phacelia | |
| Phacelia douglasii | CNPS-EB: A1 | Douglas' phacelia | |
| Verbena hastata | CNPS-EB: A1 | blue vervain |