| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Acmispon strigosus | CNPS-EB: B | strigose trefoil | |
| Agrostis hallii | CNPS-EB: A2 | Hall's bent grass | |
| Amaranthus californicus | CNPS-EB: B | Californian amaranth | |
| Amsinckia lycopsoides | CNPS-EB: C | bugloss-flowered fiddleneck, bugloss fiddleneck | |
| Aphyllon vallicola | CNPS-EB: B | California broom-rape | |
| Apocynum cannabinum | CNPS-EB: B | dogbane, Indian-hemp | |
| Brickellia californica | CNPS-EB: C | California brickellbush, California brickellia | |
| Calochortus pulchellus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo fairy-lantern | |
| Cicendia quadrangularis | CNPS-EB: A2 | timwort | |
| Cordylanthus pilosus subsp. pilosus | CNPS-EB: B | hairy bird's-beak | |
| Cyperus niger | CNPS-EB: A2 | black sedge | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Eriophyllum lanatum var. achilleoides | CNPS-EB: C | woolly sunflower | |
| Fritillaria liliacea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | fragrant fritillary | |
| Glycyrrhiza lepidota | CNPS-EB: C | wild licorice | |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Malacothamnus hallii | (M. fasciculatus in Jepson Man | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Hall's bush-mallow |
| Navarretia viscidula | CNPS-EB: A2 | sticky navarretia | |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Packera breweri | (formerly Senecio b.) | CNPS-EB: B-PV | Brewer's ragwort, Brewer's butterweed |
| Plagiobothrys fulvus var. campestris | CNPS-EB: B | field popcornflower, fulvous popcornflower | |
| Plagiobothrys tenellus | CNPS-EB: B | Pacific popcornflower, slender popcornflower | |
| Pleuropogon californicus var. californicus | CNPS-EB: B-PV | semaphore grass | |
| Ranunculus occidentalis var. occidentalis | CNPS-EB: B | western buttercup | |
| Rumex crassus | (formerly R. salicifolius var. crassus | CNPS-EB: A2 | willow dock |
| Salvia spathacea | CNPS-EB: A1 | California hummingbird sage, hummingbird sage | |
| Symphyotrichum subulatum var. parviflorum | (formerly Aster subulatus var. | CNPS-EB: B | slim aster |
| Trifolium obtusiflorum | CNPS-EB: B | clammy clover, creek clover | |
| Trifolium oliganthum | CNPS-EB: C | few-flowered clover | |
| Allophyllum gilioides subsp. gilioides | CNPS-EB: A2 | straggling gilia | |
| Anemopsis californica | CNPS-EB: B | yerba mansa, lizard tail | |
| Arbutus menziesii | CNPS-EB: C | Pacific madrone | |
| Chenopodium berlandieri var. unknown | Split into 2 varieties. Sites need to be surveyed to determine vars.. | CNPS-EB: A2? | pitseed goosefoot |
| Collinsia sparsiflora var. unknown | CNPS-EB: C? | few-flowered blue-eyed Mary | |
| Datisca glomerata | CNPS-EB: C | durango root | |
| Delphinium variegatum subsp. variegatum | CNPS-EB: C | royal larkspur | |
| Dudleya cymosa subsp. paniculata | CNPS-EB: B-PV | spreading dudleya | |
| Eleocharis parishii | CNPS-EB: A1 | Dombey's spike-rush | |
| Epipactis gigantea | CNPS-EB: A1 | stream orchid | |
| Eragrostis mexicana subsp. virescens | CNPS-EB: A1 | Orcutt's eragrostis | |
| Eriophyllum jepsonii | CNPS-EB: *A2 State CNPS: 4.3 Global Rank: G3 CNDDB Rank: S3 | Jepson's woolly sunflower | |
| Euphorbia serpillifolia subsp. serpillifolia | CNPS-EB: C | thyme-leaved spurge | |
| Galium andrewsii subsp. gatense | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5T3 CNDDB Rank: S3 | phlox-leaf serpentine bedstraw, serpentine bedstraw | |
| Helianthus californicus | CNPS-EB: B | California sunflower | |
| Juncus mexicanus | CNPS-EB: C | Mexican rush | |
| Koeleria macrantha | CNPS-EB: B-PV | june grass | |
| Leptochloa fusca subsp. fascicularis | CNPS-EB: A2 | bearded sprangletop | |
| Leptosiphon ciliatus | (formerly Linanthus c.) | CNPS-EB: C | whisker brush |
| Lupinus luteolus | CNPS-EB: A1x | butter lupine | |
| Malacothamnus fremontii var. fremontii | CNPS-EB: B-PV | white-coat mallow | |
| Monolopia major | CNPS-EB: B | cupped monolopia | |
| Phacelia ramosissima | CNPS-EB: A2 | branching phacelia | |
| Pseudognaphalium beneolens | (formerly Gnaphalium canescens | CNPS-EB: C | fragrant everlasting |
| Quercus lobata | CNPS-EB: C | valley oak, roble | |
| Rhus aromatica | (formerly R. trilobata) | CNPS-EB: C | skunk bush, skunkbrush, squawbush |
| Thysanocarpus laciniatus | CNPS-EB: B | lacepod |