| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Acmispon strigosus | CNPS-EB: B | strigose trefoil | |
| Agoseris heterophylla var. heterophylla | CNPS-EB: C | ||
| Allium amplectens | CNPS-EB: A2 | narrow-leaved onion | |
| Allophyllum divaricatum | CNPS-EB: C | straggling gilia | |
| Amsinckia tessellata var. tessellata | CNPS-EB: A1 | desert fiddleneck, devil's lettuce | |
| Arctostaphylos glandulosa subsp. glandulosa | CNPS-EB: B | Eastwood manzanita | |
| Arctostaphylos manzanita subsp. laevigata | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | Contra Costa manzanita | |
| Aspidotis californica | CNPS-EB: A2 | California lace fern | |
| Blennosperma nanum var. nanum | CNPS-EB: C | blennosperma | |
| Bolboschoenus maritimus subsp. paludosus | (formerly Scirpus m.) | CNPS-EB: C | bulrush |
| Calandrinia breweri | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Brewer's calandrinia | |
| Calochortus pulchellus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo fairy-lantern | |
| Clarkia concinna subsp. concinna | CNPS-EB: C | large godetia | |
| Collinsia sparsiflora var. sparsiflora | CNPS-EB: C | few-flowered blue-eyed Mary | |
| Cordylanthus pilosus subsp. pilosus | CNPS-EB: B | hairy bird's-beak | |
| Crocanthemum scoparium var. vulgare | (formerly Helianthemum scoparium var. vulgare) | CNPS-EB: B | peak rush-rose |
| Cryptantha micromeres | CNPS-EB: A2 | minute-flowered cryptantha | |
| Cryptantha microstachys | CNPS-EB: A2 | Tejon cryptantha | |
| Delphinium variegatum subsp. variegatum | CNPS-EB: C | royal larkspur | |
| Deschampsia danthonioides | CNPS-EB: C | annual hair grass | |
| Deschampsia elongata | CNPS-EB: C | slender hair grass | |
| Ehrendorferia chrysantha | (formerly Dicentra chrysantha) | CNPS-EB: B | golden ear-drops |
| Epilobium torreyi | CNPS-EB: A1 | narrow-leaved boisduvalia | |
| Equisetum laevigatum | CNPS-EB: A2 | smooth scouring rush | |
| Eriastrum abramsii | CNPS-EB: A2 | Abram's eriastrum | |
| Eryngium jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
| Erythranthe nasuta | CNPS-EB: A2 | shy monkeyflower | |
| Festuca octoflora | CNPS-EB: A2 | sixweeks grass, slender fescue | |
| Fraxinus dipetala | CNPS-EB: B | California ash, flowering ash | |
| 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 | |
| Gilia tricolor subsp. tricolor | CNPS-EB: C | birds-eye gilia | |
| 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 | |
| Helianthus gracilentus | CNPS-EB: B | slender sunflower | |
| Juncus mexicanus | CNPS-EB: C | Mexican rush | |
| Lepechinia calycina | CNPS-EB: C | pitcher sage | |
| Leptosiphon ciliatus | (formerly Linanthus c.) | CNPS-EB: C | whisker brush |
| Leptosiphon pygmaeus subsp. continentalis | (formerly Linanthus p. ssp. c. | CNPS-EB: B | pygmy linanthus, pygmy leptosiphon |
| Navarretia intertexta | CNPS-EB: A2 | needle-leaved navarretia | |
| Navarretia pubescens | CNPS-EB: C | downy navarretia | |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Osmorhiza brachypoda | CNPS-EB: C | California cicely | |
| Papaver californicum | CNPS-EB: B | fire poppy | |
| Pentachaeta alsinoides | CNPS-EB: C | tiny pentachaeta | |
| Phoradendron leucarpum subsp. macrophyllum | (formerly P. serotinum subsp. macrophyllum, P. macrophyllum) | CNPS-EB: C | big leaf mistletoe |
| Pickeringia montana var. montana | CNPS-EB: C | chaparral pea | |
| Piperia elongata | CNPS-EB: C | chaparral orchid, wood rein-orchid, elongate piperia | |
| Piperia michaelii | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | Michael's rein-orchid | |
| Piperia unalascensis | CNPS-EB: A1 | Alaska piperia, slender-spire orchid | |
| Plagiobothrys trachycarpus | CNPS-EB: C | rough-nutlet popcornflower, rough-fruited allocarya | |
| Quercus berberidifolia | CNPS-EB: C | scrub oak | |
| Quercus wislizeni var. frutescens | CNPS-EB: C | shrubby interior live oak | |
| Ribes malvaceum var. malvaceum | CNPS-EB: C | chaparral currant | |
| Rosa spithamea | CNPS-EB: C | coast ground rose, ground rose | |
| Scribneria bolanderi | CNPS-EB: B | Scribner's grass | |
| Sedella pentandra | (formorely Parvisedum pentandr | CNPS-EB: A1 | Mount Hamilton sedella |
| Stipa lepida | CNPS-EB: C | foothill needlegrass | |
| Thysanocarpus radians | CNPS-EB: A1 | ribbed fringe pod | |
| Trifolium olivaceum | CNPS-EB: C | olive clover | |
| Triglochin scilloides | CNPS-EB: C | flowering-quillwort | |
| 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 |
| Aphyllon purpureum | CNPS-EB: C | naked broomrape | |
| Aphyllon tuberosum | CNPS-EB: C | bulbous broom-rape | |
| Apocynum cannabinum | CNPS-EB: B | dogbane, Indian-hemp | |
| Arctostaphylos auriculata | CNPS-EB: *A2 State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo manzanita | |
| Arctostaphylos glauca | CNPS-EB: C | big-berried manzanita | |
| Arctostaphylos manzanita subsp. manzanita | CNPS-EB: A2 | common manzanita | |
| Berberis aquifolium var. dictyota | CNPS-EB: A1 | Jepson's mahonia | |
| Carex barbarae | CNPS-EB: C | whiteroot sedge, Santa Barbara sedge, St. Barbara's sedge | |
| Cirsium cymosum var. cymosum | CNPS-EB: C | peregrine thistle | |
| Claytonia exigua subsp. exigua | CNPS-EB: C | common montia | |
| Delphinium hesperium subsp. hesperium | CNPS-EB: B | western larkspur | |
| Delphinium nudicaule | CNPS-EB: C | red larkspur, orange larkspur | |
| Elymus multisetus | CNPS-EB: C | big squirreltail | |
| Elymus stebbinsii | CNPS-EB: A1x | Stebbins' wheat grass, Parish's wheat-grass | |
| Elymus trachycaulus subsp. trachycaulus | CNPS-EB: A1 | slender wheat grass | |
| Erigeron petrophilus var. petrophilus | CNPS-EB: B | rock daisy | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Eriophyllum lanatum var. achilleoides | CNPS-EB: C | woolly sunflower | |
| Festuca idahoensis | CNPS-EB: C | Idaho fescue, blue bunchgrass | |
| Frangula californica subsp. tomentella | (formerly Rhamnus t.) | CNPS-EB: C | hoary coffeeberry |
| Garrya fremontii | CNPS-EB: A1x | silk tassel bush | |
| Githopsis specularioides | CNPS-EB: B | common bluecup | |
| Holocarpha obconica | CNPS-EB: B | San Joaquin tarplant | |
| Horkelia californica var. frondosa | CNPS-EB: B | leafy horkelia | |
| Koeleria macrantha | CNPS-EB: C | june grass | |
| Lasthenia microglossa | CNPS-EB: A2 | small-ray goldfields | |
| Lathyrus jepsonii var. californicus | CNPS-EB: B | buff pea | |
| Layia gaillardioides | CNPS-EB: A2 | woodland layia | |
| Leptosiphon androsaceus | (formerly Linanthus a.) | CNPS-EB: C | common linanthus, common leptosiphon |
| Malacothamnus fremontii | CNPS-EB: C | white-coat mallow | |
| Melica californica | CNPS-EB: C | California melic | |
| Montia fontana | CNPS-EB: C | water chickweed, blinks, water chickweed | |
| Muilla maritima | CNPS-EB: B | common muilla | |
| Navarretia mellita | CNPS-EB: C | honey-scented navarretia | |
| Nemophila parviflora var. parviflora | CNPS-EB: B | small-flowered nemophila | |
| Nemophila pedunculata | CNPS-EB: B | meadow nemophila | |
| Packera breweri | (formerly Senecio b.) | CNPS-EB: C | Brewer's ragwort, Brewer's butterweed |
| Phacelia ciliata | CNPS-EB: B | Great Valley phacelia, Great Valley phacelia | |
| Piperia elegans subsp. elegans | CNPS-EB: C | coast piperia, elegant piperia | |
| Plagiobothrys canescens var. canescens | CNPS-EB: C | valley popcornflower | |
| Plagiobothrys stipitatus var. stipitatus | (var. micranthus is more commo | CNPS-EB: C | showy great valley popcornflower, stipitate allocarya |
| Platanus racemosa | CNPS-EB: C | western sycamore, California sycamore | |
| Plectritis congesta subsp. congesta | CNPS-EB: A1x | sea blush | |
| Prunus subcordata | CNPS-EB: C | Pacific plum, Sierra plum | |
| Quercus lobata | CNPS-EB: B | valley oak, roble | |
| Quercus xjolonensis | CNPS-EB: A1? | blue oak x valley oak | |
| Ranunculus occidentalis var. occidentalis | CNPS-EB: B | western buttercup | |
| Rhamnus crocea | CNPS-EB: C | spiny redberry | |
| Rhus aromatica | (formerly R. trilobata) | CNPS-EB: B | skunk bush, skunkbrush, squawbush |
| Rigiopappus leptocladus | CNPS-EB: C | rigiopappus | |
| Rumex salicifolius | (formerly R. salicifolius var. salicifolius) | CNPS-EB: B | willow dock |
| Sabulina pusilla | (formerly Minuartia pusilla) | CNPS-EB: A1 | annual sandwort, least sandwort |
| Senecio aronicoides | CNPS-EB: C | rayless ragwort, California butterweed | |
| Silene laciniata subsp. californica | (formerly Silene c.) | CNPS-EB: B | Indian pink, California pink, California Indian pink |
| Stellaria nitens | CNPS-EB: C | shining chickweed | |
| Stipa pulchra | CNPS-EB: C | purple needlegrass | |
| Trifolium depauperatum var. depauperatum | (vars. amplectens and truncatu | CNPS-EB: B | dwarf sack clover |
| Trifolium dichotomum | CNPS-EB: C | branched indian clover | |
| Trifolium oliganthum | CNPS-EB: C | few-flowered clover | |
| Tropidocarpum gracile | CNPS-EB: B | slender tropidocarpum |