| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Cordylanthus pilosus subsp. pilosus | CNPS-EB: B | hairy bird's-beak | |
| Eryngium jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
| Nemophila parviflora var. parviflora | CNPS-EB: B | small-flowered nemophila | |
| Sidalcea diploscypha | CNPS-EB: A1 | fringed checkerbloom, fringed sidalcea | |
| Carex barbarae | CNPS-EB: C | whiteroot sedge, Santa Barbara sedge, St. Barbara's sedge | |
| Collinsia sparsiflora var. unknown | CNPS-EB: C? | few-flowered blue-eyed Mary | |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Hemizonia congesta subsp. lutescens | CNPS-EB: B | hayfield tarweed | |
| Koeleria macrantha | CNPS-EB: C | june grass | |
| Platanus racemosa | CNPS-EB: C | western sycamore, California sycamore | |
| Prunus subcordata | CNPS-EB: C | Pacific plum, Sierra plum | |
| Quercus lobata | CNPS-EB: B | valley oak, roble | |
| Scirpus microcarpus | CNPS-EB: C | small-fruited bulrush | |
| Stipa pulchra | CNPS-EB: C | purple needlegrass |