| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Agoseris retrorsa | CNPS-EB: A2 | spear-leaved agoseris | |
| Agrostis hallii | CNPS-EB: A2 | Hall's bent grass | |
| Allophyllum divaricatum | CNPS-EB: C | straggling gilia | |
| Allophyllum gilioides subsp. violaceum | (ssp. gilioides is more common | CNPS-EB: B | straggling gilia |
| Amaranthus blitoides | CNPS-EB: C | procumbent pigweed, prostrate amaranth | |
| Amsinckia lycopsoides | CNPS-EB: C | bugloss-flowered fiddleneck, bugloss fiddleneck | |
| Androsace elongata subsp. acuta | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5?T3T4 CNDDB Rank: S3S4 | California androsace | |
| Antirrhinum kelloggii | CNPS-EB: A1 | lax snapdragon | |
| 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 crustacea subsp. crustacea | CNPS-EB: C | brittleleaf manzanita | |
| 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 | |
| Arnica discoidea | CNPS-EB: B | rayless arnica | |
| Aspidotis californica | CNPS-EB: A2 | California lace fern | |
| 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 | |
| Calochortus pulchellus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo fairy-lantern | |
| Calochortus splendens | CNPS-EB: A2 | splendid mariposa-lily | |
| Calochortus umbellatus | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3? CNDDB Rank: S3? | Oakland star-tulip | |
| Camissoniopsis hirtella | CNPS-EB: B | small primrose | |
| Camissoniopsis intermedia | CNPS-EB: C | small primrose | |
| Campanula exigua | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | chaparral harebell | |
| Carex barbarae | CNPS-EB: C | whiteroot sedge, Santa Barbara sedge, St. Barbara's sedge | |
| Carex globosa | CNPS-EB: B | round-fruited sedge | |
| Carex multicostata | CNPS-EB: A1 | many-ribbed sedge | |
| Carex nudata | CNPS-EB: B | torrent sedge | |
| Carex praegracilis | CNPS-EB: C | black creeper sedge, freeway sedge, deer-bed sedge | |
| Carex serratodens | CNPS-EB: C | saw-toothed sedge, bifid sedge | |
| Castilleja rubicundula subsp. lithospermoides | CNPS-EB: B | cream sacs | |
| Cirsium occidentale var. californicum | (var. venustum is more common) | CNPS-EB: A2 | California thistle |
| Clarkia purpurea subsp. purpurea | (ssp. quadrivulnera is more co | CNPS-EB: A2 | purple clarkia |
| Cornus glabrata | CNPS-EB: A1 | brown dogwood | |
| Crassula aquatica | CNPS-EB: B | water pygmy-weed | |
| Crocanthemum scoparium var. vulgare | (formerly Helianthemum scoparium var. vulgare) | CNPS-EB: B | peak rush-rose |
| Cryptantha clevelandii var. florosa | CNPS-EB: B | Cleveland's cryptantha | |
| Cryptantha micromeres | CNPS-EB: A2 | minute-flowered cryptantha | |
| Cryptantha microstachys | CNPS-EB: A2 | Tejon cryptantha | |
| Cyperus niger | CNPS-EB: A2 | black sedge | |
| Datisca glomerata | CNPS-EB: C | durango root | |
| Delphinium hesperium subsp. hesperium | CNPS-EB: B | western larkspur | |
| Delphinium variegatum subsp. variegatum | CNPS-EB: C | royal larkspur | |
| Dudleya cymosa subsp. paniculata | CNPS-EB: C | spreading dudleya | |
| Ehrendorferia chrysantha | (formerly Dicentra chrysantha) | CNPS-EB: B | golden ear-drops |
| Eleocharis acicularis var. acicularis | CNPS-EB: B | needle spike-rush | |
| Ericameria arborescens | CNPS-EB: B | golden-fleece | |
| Erigeron petrophilus var. petrophilus | CNPS-EB: B | rock daisy | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Eriogonum covilleanum | CNPS-EB: A2 | Coville's wild buckwheat, Coville's eriogonum | |
| Eriogonum gracile var. gracile | CNPS-EB: C | slender woolly wild buckwheat, slender buckwheat | |
| Eriophyllum lanatum var. achilleoides | CNPS-EB: C | woolly sunflower | |
| Eryngium castrense | CNPS-EB: A2 | great valley coyote-thistle, Vasey's coyote-thistle | |
| Eryngium jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
| Festuca californica | CNPS-EB: C | California fescue | |
| Galium andrewsii subsp. gatense | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5T3 CNDDB Rank: S3 | phlox-leaf serpentine bedstraw, serpentine bedstraw | |
| Garrya elliptica | CNPS-EB: B | silk tassel bush | |
| Gratiola ebracteata | CNPS-EB: A1 | bractless hedge-hyssop | |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Helianthus californicus | CNPS-EB: C | California sunflower | |
| Helianthus gracilentus | CNPS-EB: B | slender sunflower | |
| Hesperolinon breweri | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Brewer's western flax | |
| Hesperolinon californicum | CNPS-EB: B | California dwarf flax | |
| Hesperolinon micranthum | CNPS-EB: A2 | small-flowered dwarf flax | |
| Hieracium albiflorum | CNPS-EB: C | white hawkweed | |
| Hordeum brachyantherum subsp. californicum | (ssp. brachyantherum is more common | CNPS-EB: A2 | California barley |
| Isoetes howellii | CNPS-EB: A1 | Howell's quillwort | |
| Layia hieracioides | CNPS-EB: C | tall layia | |
| Lepechinia calycina | CNPS-EB: C | pitcher sage | |
| Lythrum californicum | CNPS-EB: B | California loosestrife | |
| Malacothamnus fremontii | CNPS-EB: C | white-coat mallow | |
| Malacothamnus hallii | (M. fasciculatus in Jepson Man | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Hall's bush-mallow |
| Malacothrix clevelandii | CNPS-EB: A2 | Cleveland's malacothrix | |
| Micropus californicus var. subvestitus | (var. californicus is more common) | CNPS-EB: A2 | slender cottonweed |
| Monolopia gracilens | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G3 CNDDB Rank: S3 | woodland woollythreads, woodland monolopia | |
| Montia fontana | CNPS-EB: C | water chickweed, blinks, water chickweed | |
| Osmorhiza brachypoda | CNPS-EB: C | California cicely | |
| Packera breweri | (formerly Senecio b.) | CNPS-EB: C | Brewer's ragwort, Brewer's butterweed |
| Papaver californicum | CNPS-EB: B | fire poppy | |
| Penstemon heterophyllus var. heterophyllus | CNPS-EB: B | chaparral penstemon | |
| Pentachaeta alsinoides | CNPS-EB: C | tiny pentachaeta | |
| Perideridia californica | CNPS-EB: C | California yampah | |
| Phacelia phacelioides | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo phacelia | |
| Phacelia suaveolens | CNPS-EB: A1 | sweet-scented phacelia | |
| Pickeringia montana var. montana | CNPS-EB: C | chaparral pea | |
| Pinus attenuata | CNPS-EB: A1 | knobcone pine | |
| Pinus coulteri | CNPS-EB: B | Coulter pine | |
| 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 transversa | CNPS-EB: B | flat spurred piperia, transverse piperia | |
| Quercus garryana var. garryana | CNPS-EB: B | Oregon oak | |
| Quercus xchasei | CNPS-EB: B | Chase oak | |
| Quercus xeplingii | CNPS-EB: A1 | Oregon oak x blue oak | |
| Ribes malvaceum var. malvaceum | CNPS-EB: C | chaparral currant | |
| Rigiopappus leptocladus | CNPS-EB: C | rigiopappus | |
| Rorippa curvisiliqua | CNPS-EB: B | yellow cress | |
| Rosa spithamea | CNPS-EB: C | coast ground rose, ground rose | |
| Sagina decumbens subsp. occidentalis | (S. apetala is more common) | CNPS-EB: B | western pearlwort |
| Scribneria bolanderi | CNPS-EB: B | Scribner's grass | |
| Scutellaria tuberosa | CNPS-EB: C | Dannie's skullcap | |
| Sedum spathulifolium | CNPS-EB: B | broadleaf stonecrop, Pacific stonecrop | |
| Stebbinsoseris heterocarpa | CNPS-EB: C | grassland silverpuffs, derived microseris | |
| Stipa cernua | CNPS-EB: C | nodding needlegrass | |
| Streptanthus hispidus | CNPS-EB: *A2 State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo jewelflower | |
| Symphyotrichum lanceolatum var. hesperium | (formerly Aster lanceolatus ss | CNPS-EB: A2 | marsh aster |
| Trifolium obtusiflorum | CNPS-EB: B | clammy clover, creek clover | |
| Trifolium wormskioldii | CNPS-EB: A1 | cow clover | |
| Triodanis biflora | CNPS-EB: A2 | Venus' looking-glass | |
| Viburnum ellipticum | CNPS-EB: *A2 State CNPS: 2B.3 Global Rank: G4G5 CNDDB Rank: S3 | oval-leaved viburnum | |
| Zeltnera davyi | (formerly Centaurium d.) | CNPS-EB: B | Davy's centaury, conchalagua |
| Acmispon strigosus | CNPS-EB: B | strigose trefoil | |
| Agoseris heterophylla var. heterophylla | CNPS-EB: C | ||
| Ammannia coccinea | CNPS-EB: A1 | long-leaved ammannia | |
| Ancistrocarphus filagineus | CNPS-EB: C | woolly fishhooks | |
| Apiastrum angustifolium | CNPS-EB: C | wild celery | |
| Apocynum androsaemifolium | CNPS-EB: A2 | bitter dogbane, dogbane | |
| Arbutus menziesii | CNPS-EB: B | Pacific madrone | |
| Arctostaphylos glauca | CNPS-EB: C | big-berried manzanita | |
| Arctostaphylos manzanita subsp. manzanita | CNPS-EB: A2 | common manzanita | |
| Calamagrostis rubescens | CNPS-EB: B | pine reed grass, pine grass | |
| Chenopodium berlandieri var. sinuatum | CNPS-EB: A1 | ||
| Chenopodium berlandieri var. unknown | Split into 2 varieties. Sites need to be surveyed to determine vars.. | CNPS-EB: A2? | pitseed goosefoot |
| Cicendia quadrangularis | CNPS-EB: A2 | timwort | |
| Cirsium cymosum var. cymosum | CNPS-EB: C | peregrine thistle | |
| Cirsium douglasii var. douglasii | CNPS-EB: A1 | swamp thistle | |
| Claytonia exigua subsp. exigua | CNPS-EB: C | common montia | |
| Claytonia exigua subsp. glauca | (ssp. exigua is more common) | CNPS-EB: A1x | claytonia |
| Claytonia rubra subsp. depressa | CNPS-EB: A1x | miner's lettuce | |
| Collomia heterophylla | CNPS-EB: A1 | variable-leaf collomia | |
| Cordylanthus pilosus subsp. pilosus | CNPS-EB: B | hairy bird's-beak | |
| Cryptantha juniperensis | (formerly C. nevadensis var. rigida) | CNPS-EB: A1 | Nevada cryptantha |
| Cryptantha torreyana var. pumila | CNPS-EB: B | Torrey's cryptantha | |
| Delphinium californicum subsp. californicum | CNPS-EB: B | coast larkspur, California larkspur | |
| Delphinium nudicaule | CNPS-EB: C | red larkspur, orange larkspur | |
| Deschampsia elongata | CNPS-EB: C | slender hair grass | |
| Elymus elymoides var. elymoides | CNPS-EB: B | squirreltail | |
| Elymus xhansenii | CNPS-EB: B | Hansen squirreltail | |
| Epilobium torreyi | CNPS-EB: A1 | narrow-leaved boisduvalia | |
| Equisetum laevigatum | CNPS-EB: A2 | smooth scouring rush | |
| Eriogonum truncatum | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | Mount Diablo buckwheat | |
| Erythranthe nasuta | CNPS-EB: A2 | shy monkeyflower | |
| Festuca idahoensis | CNPS-EB: C | Idaho fescue, blue bunchgrass | |
| Festuca octoflora | CNPS-EB: A2 | sixweeks grass, slender fescue | |
| Frangula californica subsp. tomentella | (formerly Rhamnus t.) | CNPS-EB: C | hoary coffeeberry |
| Gilia millefoliata | CNPS-EB: *A1x State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | DARK-EYED GILIA | |
| Gilia tricolor subsp. tricolor | CNPS-EB: C | birds-eye gilia | |
| Githopsis diffusa subsp. robusta | CNPS-EB: A2 | southern bluecup | |
| Githopsis specularioides | CNPS-EB: B | common bluecup | |
| Gruvelia pusilla | (formerly Pectocarya pusilla) | CNPS-EB: B | little pectocarya |
| Heterocodon rariflorum | CNPS-EB: A1 | heterocodon | |
| Heterotheca sessiliflora subsp. bolanderi | (H. s. ssp. echioides is more | CNPS-EB: C | Bolander goldenaster |
| Juncus mexicanus | CNPS-EB: C | Mexican rush | |
| Juniperus californica | CNPS-EB: C | California juniper | |
| Koeleria macrantha | CNPS-EB: C | june grass | |
| Lasthenia glabrata subsp. glabrata | CNPS-EB: A2 | yellow-ray goldfields | |
| Layia gaillardioides | CNPS-EB: A2 | woodland layia | |
| Leptosiphon androsaceus | (formerly Linanthus a.) | CNPS-EB: C | common linanthus, common leptosiphon |
| 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 |
| Lithophragma bolanderi | CNPS-EB: A1 | Bolander starflower | |
| Lupinus pachylobus | CNPS-EB: B | big pod lupine | |
| Madia exigua | CNPS-EB: C | ||
| Mentzelia micrantha | CNPS-EB: A2 | small-flowered stick-leaf | |
| Microseris elegans | CNPS-EB: A1 | elegant microseris | |
| Monolopia major | CNPS-EB: B | cupped monolopia | |
| Navarretia mellita | CNPS-EB: C | honey-scented navarretia | |
| Navarretia pubescens | CNPS-EB: C | downy navarretia | |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Oenothera elata subsp. hookeri | CNPS-EB: B | evening-primrose | |
| Panicum capillare | CNPS-EB: A2 | witch grass | |
| Perideridia oregana | CNPS-EB: A2 | yampah | |
| Phoradendron leucarpum subsp. macrophyllum | (formerly P. serotinum subsp. macrophyllum, P. macrophyllum) | CNPS-EB: C | big leaf mistletoe |
| Piperia elegans subsp. elegans | CNPS-EB: C | coast piperia, elegant piperia | |
| Plagiobothrys acanthocarpus | CNPS-EB: B | adobe popcornflower, adobe allocarya | |
| Plagiobothrys canescens var. canescens | CNPS-EB: C | valley popcornflower | |
| Plagiobothrys tenellus | CNPS-EB: B | Pacific popcornflower, slender popcornflower | |
| Platanus racemosa | CNPS-EB: C | western sycamore, California sycamore | |
| Poa howellii | CNPS-EB: A2 | Howell's bluegrass | |
| Pseudognaphalium beneolens | (formerly Gnaphalium canescens | CNPS-EB: C | fragrant everlasting |
| Quercus berberidifolia | CNPS-EB: C | scrub oak | |
| Quercus lobata | CNPS-EB: B | valley oak, roble | |
| Quercus wislizeni var. frutescens | CNPS-EB: C | shrubby interior live oak | |
| Ranunculus canus var. canus | CNPS-EB: C | Sacramento Valley buttercup | |
| Rhus aromatica | (formerly R. trilobata) | CNPS-EB: B | skunk bush, skunkbrush, squawbush |
| Rumex salicifolius | (formerly R. salicifolius var. salicifolius) | CNPS-EB: B | willow dock |
| Senecio aronicoides | CNPS-EB: C | rayless ragwort, California butterweed | |
| Stellaria nitens | CNPS-EB: C | shining chickweed | |
| Stephanomeria elata | CNPS-EB: A2 | stephanomeria | |
| Stipa lepida | CNPS-EB: C | foothill needlegrass | |
| Stipa pulchra | CNPS-EB: C | purple needlegrass | |
| Tetrapteron graciliflorum | CNPS-EB: C | hill sun cup | |
| Thysanocarpus laciniatus | CNPS-EB: B | lacepod | |
| Trifolium barbigerum | CNPS-EB: A2 | bearded clover | |
| Trifolium dichotomum | CNPS-EB: C | branched indian clover | |
| Trifolium olivaceum | CNPS-EB: C | olive clover | |
| Tropidocarpum gracile | CNPS-EB: B | slender tropidocarpum | |
| Viola purpurea subsp. quercetorum | CNPS-EB: C | mountain violet |