| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Delphinium californicum subsp. interius | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G3T3 CNDDB Rank: S3 | Hospital Canyon larkspur | |
| Enemion stipitatum | (formerly Isopyrum s.) | CNPS-EB: A2 | Siskiyou rue-anemone |
| Leptosiphon ambiguus | (formerly Linanthus a.) | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | serpentine leptosiphon, serpentine linanthus |
| Lessingia tenuis | CNPS-EB: *A2 State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | spring lessingia | |
| Agoseris heterophylla var. unknown | Agoseris heterophylla split into 2 vars. in 2011 Jepson Manual, need field work to resolve vars. | CNPS-EB: B? | annual agoseris |
| Allium amplectens | CNPS-EB: A2 | narrow-leaved onion | |
| Allium bolanderi var. bolanderi | CNPS-EB: A1 | Bolander's onion | |
| Allium sharsmithiae | CNPS-EB: *A2 State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Sharsmith's onion | |
| Androsace elongata subsp. acuta | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5?T3T4 CNDDB Rank: S3S4 | California androsace | |
| Anemopsis californica | CNPS-EB: B | yerba mansa, lizard tail | |
| Carex praegracilis | CNPS-EB: C | black creeper sedge, freeway sedge, deer-bed sedge | |
| Collinsia parviflora | CNPS-EB: B | blue-eyed Mary | |
| Deschampsia danthonioides | CNPS-EB: C | annual hair grass | |
| Elymus multisetus | CNPS-EB: C | big squirreltail | |
| Eriogonum wrightii var. trachygonum | CNPS-EB: C | rough-node bastard-sage, Wright's eriogonum | |
| Galium andrewsii subsp. gatense | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5T3 CNDDB Rank: S3 | phlox-leaf serpentine bedstraw, serpentine bedstraw | |
| Garrya flavescens | CNPS-EB: A2 | silk tassel bush | |
| Gruvelia pusilla | (formerly Pectocarya pusilla) | CNPS-EB: B | little pectocarya |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Heterocodon rariflorum | CNPS-EB: A1 | heterocodon | |
| Holozonia filipes | CNPS-EB: A2 | whitecrown, holozonia | |
| Montia fontana | CNPS-EB: C | water chickweed, blinks, water chickweed | |
| Myriopteris covillei | CNPS-EB: C | Coville's lip fern | |
| Myriopteris intertexta | CNPS-EB: B | coastal lip fern | |
| Osmorhiza brachypoda | CNPS-EB: C | California cicely | |
| Phacelia ramosissima | CNPS-EB: B | branching phacelia | |
| Plagiobothrys canescens var. canescens | CNPS-EB: C | valley popcornflower | |
| Prunus subcordata | CNPS-EB: C | Pacific plum, Sierra plum | |
| Ribes quercetorum | CNPS-EB: A2 | oakwoods gooseberry, oak gooseberry | |
| Sedella pentandra | (formorely Parvisedum pentandr | CNPS-EB: A1 | Mount Hamilton sedella |
| Senecio aronicoides | CNPS-EB: C | rayless ragwort, California butterweed | |
| Stylocline gnaphaloides | CNPS-EB: B | everlasting neststraw, nest-straw | |
| Toxicoscordion venenosum var. venenosum | (formerly Zigadenus venenosus) | CNPS-EB: A1 | death-camas |
| Trifolium olivaceum | CNPS-EB: C | olive clover | |
| Triteleia peduncularis | CNPS-EB: A1x | long-rayed brodiaea | |
| Viola purpurea subsp. quercetorum | CNPS-EB: C | mountain violet | |
| Viola sheltonii | CNPS-EB: A2 | Shelton's violet, fan violet |