| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Cornus sericea subsp. occidentalis | CNPS-EB: C | western dogwood | |
| Cornus sericea subsp. unknown | CNPS-EB: C? | American dogwood | |
| Fraxinus latifolia | CNPS-EB: B | Oregon ash | |
| Scirpus microcarpus | CNPS-EB: C | small-fruited bulrush | |
| Castilleja rubicundula subsp. lithospermoides | CNPS-EB: B | cream sacs | |
| Cornus sericea subsp. sericea | CNPS-EB: C | American dogwood | |
| Nemophila parviflora var. parviflora | CNPS-EB: B | small-flowered nemophila | |
| Plagiobothrys trachycarpus | CNPS-EB: C | rough-nutlet popcornflower, rough-fruited allocarya |