| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Agoseris heterophylla var. heterophylla | CNPS-EB: C | ||
| Allophyllum gilioides subsp. violaceum | (ssp. gilioides is more common | CNPS-EB: B | straggling gilia |
| Amsinckia tessellata var. tessellata | CNPS-EB: A1 | desert fiddleneck, devil's lettuce | |
| Arctostaphylos auriculata | CNPS-EB: *A2 State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo manzanita | |
| Arctostaphylos crustacea subsp. crustacea | CNPS-EB: C | brittleleaf manzanita | |
| Balsamorhiza deltoidea | CNPS-EB: B | deltoid balsamroot | |
| Blennosperma nanum var. nanum | CNPS-EB: C | blennosperma | |
| Blepharizonia laxa | (formerly B. plumosa ssp. visc | CNPS-EB: B | big tarplant |
| Calandrinia breweri | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Brewer's calandrinia | |
| Camissonia contorta | CNPS-EB: C | contorted primrose | |
| Camissoniopsis intermedia | CNPS-EB: C | small primrose | |
| Crocanthemum scoparium var. vulgare | (formerly Helianthemum scoparium var. vulgare) | CNPS-EB: B | peak rush-rose |
| Dendromecon rigida | CNPS-EB: A2 | bush poppy | |
| Eriophyllum lanatum var. achilleoides | CNPS-EB: C | woolly sunflower | |
| Forestiera pubescens | CNPS-EB: B | desert olive | |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Hesperolinon breweri | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Brewer's western flax | |
| Lastarriaea coriacea | CNPS-EB: A2 | leather-spineflower, lastarriaea | |
| Lepechinia calycina | CNPS-EB: C | pitcher sage | |
| Leptosiphon ciliatus | (formerly Linanthus c.) | CNPS-EB: C | whisker brush |
| Lomatium caruifolium var. caruifolium | CNPS-EB: B | caraway-leaved lomatium | |
| Navarretia atractyloides | CNPS-EB: A2 | holly-leaved navarretia | |
| Navarretia mellita | CNPS-EB: C | honey-scented navarretia | |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Pinus coulteri | CNPS-EB: B | Coulter pine | |
| Piperia transversa | CNPS-EB: B | flat spurred piperia, transverse piperia | |
| Scribneria bolanderi | CNPS-EB: B | Scribner's grass | |
| Scutellaria tuberosa | CNPS-EB: C | Dannie's skullcap | |
| Stylocline gnaphaloides | CNPS-EB: B | everlasting neststraw, nest-straw | |
| Triodanis biflora | CNPS-EB: A2 | Venus' looking-glass | |
| 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 |
| Allophyllum gilioides subsp. gilioides | CNPS-EB: A2 | straggling gilia | |
| Aphyllon purpureum | CNPS-EB: C | naked broomrape | |
| Arctostaphylos manzanita subsp. manzanita | CNPS-EB: A2 | common manzanita | |
| Collinsia sparsiflora var. unknown | CNPS-EB: C? | few-flowered blue-eyed Mary | |
| Delphinium variegatum subsp. variegatum | CNPS-EB: C | royal larkspur | |
| Festuca octoflora | CNPS-EB: A2 | sixweeks grass, slender fescue | |
| Githopsis diffusa subsp. robusta | CNPS-EB: A2 | southern bluecup | |
| Githopsis specularioides | CNPS-EB: B | common bluecup | |
| Leptosiphon pygmaeus subsp. continentalis | (formerly Linanthus p. ssp. c. | CNPS-EB: B | pygmy linanthus, pygmy leptosiphon |
| Malacothamnus fremontii | CNPS-EB: C | white-coat mallow | |
| Microseris acuminata | CNPS-EB: A1 | Sierra Foothills microseris | |
| Nemophila parviflora var. parviflora | CNPS-EB: B | small-flowered nemophila | |
| Piperia michaelii | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | Michael's rein-orchid | |
| Trifolium oliganthum | CNPS-EB: C | few-flowered clover |