| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Hibiscus lasiocarpos var. occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 | rose-mallow | |
| Lathyrus jepsonii var. jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 | delta tule pea, Delta tule pea | |
| Lilaeopsis masonii | CNPS-EB: *A2 State CNPS: 1B.1 CESA Status: CR | Mason's lilaeopsis | |
| Symphyotrichum lentum | (formerly Aster lentus) | CNPS-EB: *A2 State CNPS: 1B.2 | Suisun marsh aster |
| Stachys albens | CNPS-EB: B-PV | white hedge nettle |