| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Carex barbarae | CNPS-EB: C | whiteroot sedge, Santa Barbara sedge, St. Barbara's sedge | |
| Deinandra lobbii | (formerly Hemizonia l.) | CNPS-EB: C | three-rayed tarweed |
| Dirca occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | western leatherwood | |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Lasthenia glaberrima | CNPS-EB: B | smooth goldfields | |
| Rhus aromatica | (formerly R. trilobata) | CNPS-EB: B | skunk bush, skunkbrush, squawbush |
| Stipa pulchra | CNPS-EB: C | purple needlegrass | |
| Triphysaria versicolor subsp. faucibarbata | CNPS-EB: B | smooth owl's-clover | |
| Blennosperma nanum var. nanum | CNPS-EB: C | blennosperma | |
| Cirsium brevistylum | CNPS-EB: B | indian thistle | |
| Danthonia californica | CNPS-EB: B | California oat grass | |
| Leptosiphon parviflorus | (formerly Linanthus p.) | CNPS-EB: B | small-flowered linanthus, small-flowered leptosiphon |
| Lithophragma bolanderi | CNPS-EB: A1 | Bolander starflower | |
| Microseris douglasii subsp. tenella | (subsp douglasii is more common) | CNPS-EB: A2 | silver puffs |
| Montia fontana | CNPS-EB: C | water chickweed, blinks, water chickweed | |
| Navarretia viscidula | CNPS-EB: A2 | sticky navarretia | |
| Pseudognaphalium beneolens | (formerly Gnaphalium canescens | CNPS-EB: C | fragrant everlasting |
| Quercus lobata | CNPS-EB: B | valley oak, roble | |
| Trifolium fucatum | CNPS-EB: C | bull clover |