| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Lilaeopsis masonii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | Mason's lilaeopsis | |
| Symphyotrichum lentum | (formerly Aster lentus) | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Suisun marsh aster |
| Bidens frondosa | CNPS-EB: B | sticktight | |
| Cicuta douglasii | CNPS-EB: A2 | water-hemlock | |
| Hibiscus lasiocarpos var. occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T3 CNDDB Rank: S3 | rose-mallow | |
| Hydrocotyle verticillata | CNPS-EB: B | whorled marsh pennywort | |
| Lycopus americanus | CNPS-EB: A2 | cutleaf bugleweed | |
| Persicaria punctata | (formerly Polygonum punctatum) | CNPS-EB: C | water smartweed |
| Platanus racemosa | CNPS-EB: C | western sycamore, California sycamore | |
| Symphyotrichum subulatum var. parviflorum | (formerly Aster subulatus var. | CNPS-EB: B | slim aster |