| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Ammannia coccinea | CNPS-EB: A2 | long-leaved ammannia | |
| Castilleja wightii | CNPS-EB: B | Wight's indian paintbrush | |
| Corethrogyne filaginifolia | (formerly Lessingia f. var. f. | CNPS-EB: C | California aster |
| Cryptantha clevelandii var. florosa | CNPS-EB: A2 | Cleveland's cryptantha | |
| Downingia pulchella | CNPS-EB: B | flat-faced downingia | |
| Holocarpha macradenia | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FT CESA Status: CE | Santa Cruz tarplant | |
| Leptosiphon aureus | (formerly L.acicularis, Linanthus acicularis) | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4? CNDDB Rank: S4? | bristly leptosiphon, bristly linanthus |
| Scutellaria siphocampyloides | CNPS-EB: A2 | gray-leaved skullcap | |
| Setaria parviflora | CNPS-EB: B | knotroot bristle grass, perennial foxtail | |
| Stephanomeria elata | CNPS-EB: A1 | stephanomeria |