| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Aphyllon purpureum | CNPS-EB: C | naked broomrape | |
| Blepharizonia plumosa | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1G2 CNDDB Rank: S1S2 | big tarplant | |
| California macrophylla | (formerly Erodium macrophyllum | CNPS-EB: B-PV | round-leaved filaree |
| Calochortus pulchellus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo fairy-lantern | |
| Claytonia exigua subsp. exigua | CNPS-EB: C | common montia | |
| Erythranthe nasuta | CNPS-EB: B | shy monkeyflower | |
| Extriplex joaquinana | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | San Joaquin spearscale, San Joaquin saltbush | |
| Gilia tricolor subsp. diffusa | CNPS-EB: C | birds-eye gilia | |
| Holocarpha obconica | CNPS-EB: B | San Joaquin tarplant | |
| Lepidium latipes | CNPS-EB: B-PV | dwarf peppergrass | |
| Lupinus pachylobus | CNPS-EB: B | big pod lupine | |
| Montia fontana | CNPS-EB: B-PV | water chickweed, blinks, water chickweed | |
| Pectocarya penicillata | CNPS-EB: A2 | northern pectocarya, winged pectocarya | |
| Plagiobothrys humistratus | CNPS-EB: A2 | low popcornflower, dwarf allocarya | |
| Plagiobothrys trachycarpus | CNPS-EB: C | rough-nutlet popcornflower, rough-fruited allocarya | |
| Rhus aromatica | (formerly R. trilobata) | CNPS-EB: C | skunk bush, skunkbrush, squawbush |
| Stellaria nitens | CNPS-EB: B-PV | shining chickweed | |
| Anemopsis californica | CNPS-EB: B | yerba mansa, lizard tail | |
| Aphyllon vallicola | CNPS-EB: B | California broom-rape | |
| Astragalus asymmetricus | CNPS-EB: C | San Joaquin locoweeed | |
| 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 | |
| Caulanthus flavescens | CNPS-EB: A2 | yellow-flowered thelypodium | |
| Clarkia breweri | CNPS-EB: *A1 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Brewer's clarkia | |
| Convolvulus simulans | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | small-flowered morning-glory | |
| Deinandra kelloggii | (formerly Hemizonia k.) | CNPS-EB: A2 | Kellogg's tarweed |
| Delphinium hansenii subsp. hansenii | CNPS-EB: A2 | Hansen's larkspur | |
| Downingia insignis | CNPS-EB: A1 | cupped downingia | |
| Epilobium cleistogamum | CNPS-EB: A1 | cleistogamous boisduvalia | |
| 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 spinosepalum | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
| Erythranthe latidens | (formerly Mimulus latidens) | CNPS-EB: A1 | broad-toothed monkeyflower |
| Frangula californica subsp. tomentella | (formerly Rhamnus t.) | CNPS-EB: B | hoary coffeeberry |
| Fritillaria agrestis | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | stinkbells | |
| Githopsis diffusa subsp. robusta | CNPS-EB: A2 | southern bluecup | |
| Gruvelia pusilla | (formerly Pectocarya pusilla) | CNPS-EB: B | little pectocarya |
| Lithophragma bolanderi | CNPS-EB: A1 | Bolander starflower | |
| Malacothrix floccifera | CNPS-EB: C | woolly malacothrix | |
| Myosurus minimus subsp. minimus | CNPS-EB: B-PV | common mouse-tail | |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Penstemon heterophyllus var. purdyi | CNPS-EB: A2 | foothill penstemon | |
| Pentachaeta alsinoides | CNPS-EB: B-PV | tiny pentachaeta | |
| Pentachaeta exilis subsp. exilis | CNPS-EB: A1 | meager pentachaeta | |
| Plagiobothrys fulvus var. campestris | CNPS-EB: B | field popcornflower, fulvous popcornflower | |
| Poa howellii | CNPS-EB: A2 | Howell's bluegrass | |
| Psilocarphus oregonus | CNPS-EB: A2 | Oregon woollyheads, Oregon woolly-marbles | |
| Quercus lobata | CNPS-EB: C | valley oak, roble | |
| Trifolium fucatum | CNPS-EB: B | bull clover | |
| Trifolium olivaceum | CNPS-EB: C | olive clover | |
| Tropidocarpum gracile | CNPS-EB: B-PV | slender tropidocarpum |