| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Carex aquatilis var. dives | CNPS-EB: A1 | Sitka sedge | |
| Hibiscus lasiocarpos var. occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T3 CNDDB Rank: S3 | rose-mallow | |
| Leersia oryzoides | CNPS-EB: A1 | rice cutgrass | |
| Lilaeopsis masonii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | Mason's lilaeopsis | |
| Persicaria hydropiperoides | (formerly Polygonum h.) | CNPS-EB: A2 | false waterpepper, water-pepper |
| Pluchea odorata var. odorata | CNPS-EB: B | saltmarsh fleabane | |
| Sparganium eurycarpum var. eurycarpum | CNPS-EB: A1 | bur-reed |