| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Cephalanthus occidentalis | CNPS-EB: A2 | button bush | |
| Lilaeopsis masonii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | Mason's lilaeopsis | |
| Lupinus benthamii | (historical-1955) | CNPS-EB: A1x | spider lupine |
| Sagittaria latifolia | CNPS-EB: A1 | arrowhead | |
| Verbena hastata | CNPS-EB: A1 | blue vervain |