| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Cornus sericea subsp. sericea | CNPS-EB: C | American dogwood | |
| Cornus sericea subsp. unknown | CNPS-EB: C? | American dogwood | |
| Deschampsia danthonioides | CNPS-EB: C | annual hair grass | |
| Fraxinus latifolia | CNPS-EB: B | Oregon ash | |
| Scirpus microcarpus | CNPS-EB: C | small-fruited bulrush | |
| Asarum caudatum | CNPS-EB: B | wild-ginger | |
| Isolepis cernua | (formerly Scirpus cernuus) | CNPS-EB: C | low club-rush |
| Poa howellii | CNPS-EB: A2 | Howell's bluegrass |