| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| California macrophylla | (formerly Erodium macrophyllum | CNPS-EB: B | round-leaved filaree |
| Calochortus pulchellus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo fairy-lantern | |
| Gilia tricolor subsp. diffusa | CNPS-EB: C | birds-eye gilia | |
| Holocarpha obconica | CNPS-EB: B | San Joaquin tarplant | |
| Lepidium latipes | CNPS-EB: B | dwarf peppergrass | |
| Lupinus pachylobus | CNPS-EB: B | big pod lupine | |
| Pectocarya penicillata | CNPS-EB: A2 | northern pectocarya, winged pectocarya | |
| Rhus aromatica | (formerly R. trilobata) | CNPS-EB: C | skunk bush, skunkbrush, squawbush |
| Anemopsis californica | CNPS-EB: B | yerba mansa, lizard tail | |
| Aphyllon purpureum | CNPS-EB: C | naked broomrape | |
| Aphyllon vallicola | CNPS-EB: B | California broom-rape | |
| Atriplex coronata var. coronata | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4T3 CNDDB Rank: S3 | crownscale | |
| Blennosperma nanum var. nanum | CNPS-EB: C | blennosperma | |
| Deinandra kelloggii | (formerly Hemizonia k.) | CNPS-EB: A2 | Kellogg's tarweed |
| Delphinium hansenii subsp. hansenii | CNPS-EB: A2 | Hansen's larkspur | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Eriogonum luteolum var. luteolum | CNPS-EB: A2 | golden-carpet wild buckwheat, golden carpet | |
| Eriogonum nudum var. pubiflorum | CNPS-EB: A1x | Fremont's wild buckwheat, naked-stemmed buckwheat | |
| Eriogonum truncatum | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | Mount Diablo buckwheat | |
| Eryngium vaseyi var. vallicola | CNPS-EB: A1 | coyote-thistle, Vasey's coyote-thistle | |
| Extriplex joaquinana | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | San Joaquin spearscale, San Joaquin saltbush | |
| Frangula californica subsp. tomentella | (formerly Rhamnus t.) | CNPS-EB: B | hoary coffeeberry |
| Githopsis diffusa subsp. robusta | CNPS-EB: A2 | southern bluecup | |
| Gruvelia pusilla | (formerly Pectocarya pusilla) | CNPS-EB: B | little pectocarya |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Pentachaeta alsinoides | CNPS-EB: C | tiny pentachaeta | |
| Plagiobothrys fulvus var. campestris | CNPS-EB: B | field popcornflower, fulvous popcornflower | |
| Plagiobothrys trachycarpus | CNPS-EB: C | rough-nutlet popcornflower, rough-fruited allocarya | |
| Quercus lobata | CNPS-EB: B | valley oak, roble | |
| Trifolium olivaceum | CNPS-EB: C | olive clover |