Old River
Region: Delta - SouthKey
| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Hibiscus lasiocarpos var. occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 | rose-mallow | |
| Lilaeopsis masonii | CNPS-EB: *A2 State CNPS: 1B.1 CESA Status: CR | Mason's lilaeopsis | |
| Scutellaria galericulata | (historical-1949) | CNPS-EB: *A1x State CNPS: 2B.2 | marsh skullcap |
| Symphyotrichum lentum | (formerly Aster lentus) | CNPS-EB: *A2 State CNPS: 1B.2 | Suisun marsh aster |
| Tropidocarpum capparideum | CNPS-EB: *A1 State CNPS: 1B.1 | caper-fruited tropidocarpum | |
| Lycopus americanus | CNPS-EB: B | cutleaf bugleweed | |
| Allenrolfea occidentalis | CNPS-EB: B-PV | iodine bush | |
| Suaeda nigra | (formerly S. moquinii) | CNPS-EB: B | bush seepweed |
