| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Fraxinus latifolia | CNPS-EB: B | Oregon ash | |
| Apocynum cannabinum | CNPS-EB: B | dogbane, Indian-hemp | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Populus trichocarpa | (formerly P. balsamifera var. | CNPS-EB: C | black cottonwood |
| Scirpus microcarpus | CNPS-EB: C | small-fruited bulrush |