| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Alisma triviale | (formerly A. plantago-aquatica | CNPS-EB: C | water plantain |
| Aralia californica | CNPS-EB: C | elk clover | |
| Carex barbarae | CNPS-EB: C | whiteroot sedge, Santa Barbara sedge, St. Barbara's sedge | |
| Deschampsia elongata | CNPS-EB: C | slender hair grass | |
| Dirca occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | western leatherwood | |
| Fraxinus latifolia | CNPS-EB: B | Oregon ash | |
| Morella californica | (formerly Myrica c.) | CNPS-EB: B | wax myrtle |
| Platanus racemosa | CNPS-EB: C | western sycamore, California sycamore | |
| Tellima grandiflora | CNPS-EB: C | fringe cups | |
| Castilleja rubicundula subsp. lithospermoides | CNPS-EB: B | cream sacs | |
| Datisca glomerata | CNPS-EB: C | durango root | |
| Delphinium nudicaule | CNPS-EB: C | red larkspur, orange larkspur | |
| Eryngium jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
| Layia gaillardioides | CNPS-EB: A2 | woodland layia | |
| Layia hieracioides | CNPS-EB: C | tall layia | |
| Microseris douglasii subsp. tenella | (subsp douglasii is more common) | CNPS-EB: A2 | silver puffs |
| Monolopia major | CNPS-EB: B | cupped monolopia | |
| Penstemon heterophyllus var. purdyi | CNPS-EB: A2 | foothill penstemon |