| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Acaena californica | (formerly A. pinnatifida var. californica) | CNPS-EB: C | California acaena |
| Acmispon strigosus | CNPS-EB: B | strigose trefoil | |
| Aralia californica | CNPS-EB: C | elk clover | |
| Arbutus menziesii | CNPS-EB: B | Pacific madrone | |
| Arctostaphylos crustacea subsp. crustacea | CNPS-EB: C | brittleleaf manzanita | |
| Balsamorhiza macrolepis | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | big-scale balsamroot | |
| Calamagrostis rubescens | CNPS-EB: B | pine reed grass, pine grass | |
| Calochortus umbellatus | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3? CNDDB Rank: S3? | Oakland star-tulip | |
| Camissoniopsis micrantha | CNPS-EB: C | small primrose | |
| Carex barbarae | CNPS-EB: C | whiteroot sedge, Santa Barbara sedge, St. Barbara's sedge | |
| Carex densa | CNPS-EB: B | dense sedge | |
| Carex leptopoda | (formerly Carex deweyana subsp leptopoda | CNPS-EB: A2 | slender-footed sedge, short-scaled sedge |
| Carex obnupta | CNPS-EB: B | slough sedge | |
| Carex praegracilis | CNPS-EB: C | black creeper sedge, freeway sedge, deer-bed sedge | |
| Castilleja subinclusa subsp. franciscana | CNPS-EB: A1 | Franciscan indian paintbrush | |
| Castilleja wightii | CNPS-EB: B | Wight's indian paintbrush | |
| Cicuta douglasii | CNPS-EB: A2 | water-hemlock | |
| Cirsium brevistylum | CNPS-EB: B | indian thistle | |
| Clarkia concinna subsp. concinna | CNPS-EB: C | large godetia | |
| Clarkia gracilis subsp. gracilis | CNPS-EB: C | summer's darling | |
| Clematis ligusticifolia | CNPS-EB: C | western virgin's bower, virgin's bower | |
| Corallorhiza maculata var. maculata | (forma immaculata is more comm | CNPS-EB: A2 | spotted coralroot |
| 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 torreyana var. pumila | CNPS-EB: B | Torrey's cryptantha | |
| Cyperus erythrorhizos | CNPS-EB: B | red-rooted cyperus | |
| Danthonia californica | CNPS-EB: B | California oat grass | |
| Deinandra corymbosa | (formerly Hemizonia corymbosa) | CNPS-EB: A2 | coast tarweed |
| Delphinium nudicaule | CNPS-EB: C | red larkspur, orange larkspur | |
| Deschampsia elongata | CNPS-EB: C | slender hair grass | |
| Dirca occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | western leatherwood | |
| Eragrostis hypnoides | CNPS-EB: A2 | ||
| Eryngium jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | ||
| Festuca californica | CNPS-EB: C | California fescue | |
| Festuca idahoensis | CNPS-EB: C | Idaho fescue, blue bunchgrass | |
| Festuca octoflora | CNPS-EB: A2 | sixweeks grass, slender fescue | |
| Festuca rubra | CNPS-EB: C | red fescue | |
| Fritillaria liliacea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | fragrant fritillary | |
| Galium triflorum | CNPS-EB: C | sweet-scented bedstraw | |
| Garrya elliptica | CNPS-EB: B | silk tassel bush | |
| Gilia capitata subsp. staminea | CNPS-EB: C | blue field gilia | |
| Glycyrrhiza lepidota | CNPS-EB: C | wild licorice | |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Hesperolinon californicum | CNPS-EB: B | California dwarf flax | |
| Heterotheca sessiliflora subsp. bolanderi | (H. s. ssp. echioides is more | CNPS-EB: C | Bolander goldenaster |
| Hieracium albiflorum | CNPS-EB: C | white hawkweed | |
| Hordeum jubatum subsp. jubatum | CNPS-EB: A2 | foxtail barley, squirreltail barley | |
| Iris douglasiana | CNPS-EB: B | Douglas iris | |
| Juncus phaeocephalus var. phaeocephalus | CNPS-EB: B | brownheaded rush | |
| Koeleria macrantha | CNPS-EB: C | june grass | |
| Layia chrysanthemoides | CNPS-EB: A2 | smooth layia | |
| Layia hieracioides | CNPS-EB: C | tall layia | |
| Layia platyglossa | CNPS-EB: B | tidy-tips | |
| Leptosiphon aureus | (formerly L.acicularis, Linanthus acicularis) | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4? CNDDB Rank: S4? | bristly leptosiphon, bristly linanthus |
| Lilium pardalinum subsp. pardalinum | CNPS-EB: A1 | leopard lily | |
| Madia exigua | CNPS-EB: C | ||
| Melica californica | CNPS-EB: C | California melic | |
| Mentha canadensis | CNPS-EB: B | American cornmint, Japanese peppermint | |
| Muilla maritima | CNPS-EB: B | common muilla | |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Oxalis pilosa | (formerly O. albicans ssp. p.) | CNPS-EB: B | hairy wood-sorrel |
| Pentachaeta alsinoides | CNPS-EB: C | tiny pentachaeta | |
| Petunia parviflora | CNPS-EB: A1 | wild petunia | |
| 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 | |
| Piperia elongata | CNPS-EB: C | chaparral orchid, wood rein-orchid, elongate piperia | |
| Piperia transversa | CNPS-EB: B | flat spurred piperia, transverse piperia | |
| Prunus emarginata | CNPS-EB: C | bitter cherry | |
| Prunus subcordata | CNPS-EB: C | Pacific plum, Sierra plum | |
| Rhamnus crocea | CNPS-EB: C | spiny redberry | |
| Ribes divaricatum var. pubiflorum | CNPS-EB: C | straggle bush, straggly gooseberry | |
| Rorippa palustris subsp. palustris | CNPS-EB: B | marsh yellow-cress | |
| Rumex transitorius | CNPS-EB: B | willow dock | |
| Salix scouleriana | CNPS-EB: A2 | Scouler's willow | |
| Sanicula laciniata | CNPS-EB: A2 | coast sanicle | |
| Scirpus microcarpus | CNPS-EB: C | small-fruited bulrush | |
| Senecio aronicoides | CNPS-EB: C | rayless ragwort, California butterweed | |
| Sequoia sempervirens | CNPS-EB: C | coast redwood | |
| Silene laciniata subsp. californica | (formerly Silene c.) | CNPS-EB: B | Indian pink, California pink, California Indian pink |
| Stebbinsoseris heterocarpa | CNPS-EB: C | grassland silverpuffs, derived microseris | |
| Stipa lepida | CNPS-EB: C | foothill needlegrass | |
| Stipa pulchra | CNPS-EB: C | purple needlegrass | |
| Streptanthus glandulosus subsp. glandulosus | CNPS-EB: B | jewelflower | |
| Tellima grandiflora | CNPS-EB: C | fringe cups | |
| Trifolium depauperatum var. depauperatum | (vars. amplectens and truncatu | CNPS-EB: B | dwarf sack clover |
| Trifolium fucatum | CNPS-EB: C | bull clover | |
| Trifolium oliganthum | CNPS-EB: C | few-flowered clover | |
| Turritis glabra | CNPS-EB: B | tower mustard | |
| Vaccinium ovatum | CNPS-EB: C | California huckleberry | |
| Wyethia glabra | (W. helenioides is more common | CNPS-EB: C | mule ears |
| Adiantum aleuticum | (A. jordanii is more common) | CNPS-EB: A1 | five-finger fern |
| Agrostis hallii | CNPS-EB: A2 | Hall's bent grass | |
| Amelanchier utahensis | CNPS-EB: C | Utah service-berry | |
| Apocynum androsaemifolium | CNPS-EB: A2 | bitter dogbane, dogbane | |
| Arctostaphylos glandulosa subsp. glandulosa | CNPS-EB: B | Eastwood manzanita | |
| Brodiaea terrestris subsp. terrestris | CNPS-EB: B | dwarf brodiaea | |
| Carex gracilior | CNPS-EB: A1 | slender sedge | |
| Carex multicostata | CNPS-EB: A1 | many-ribbed sedge | |
| Carex subbracteata | CNPS-EB: B | small-bracted sedge | |
| Ceanothus thyrsiflorus var. thyrsiflorus | CNPS-EB: B | blue blossom, California lilac | |
| Chenopodium rubrum | CNPS-EB: A1 | red pigweed, red goosefoot | |
| Chorizanthe polygonoides var. polygonoides | CNPS-EB: A1 | knotweed spineflower | |
| Corallorhiza striata | (C. maculata is more common) | CNPS-EB: A1x | striped coralroot |
| Cornus sericea subsp. occidentalis | CNPS-EB: C | western dogwood | |
| Cornus sericea subsp. sericea | CNPS-EB: C | American dogwood | |
| Cornus sericea subsp. unknown | CNPS-EB: C? | American dogwood | |
| Crassula aquatica | CNPS-EB: B | water pygmy-weed | |
| Cryptantha micromeres | CNPS-EB: A2 | minute-flowered cryptantha | |
| Cryptantha muricata var. unknown | CNPS-EB: A1? | prickly cryptantha | |
| Deschampsia danthonioides | CNPS-EB: C | annual hair grass | |
| Echinodorus berteroi | CNPS-EB: A2 | burhead | |
| Elymus multisetus | CNPS-EB: C | big squirreltail | |
| Elymus trachycaulus subsp. trachycaulus | CNPS-EB: A1 | slender wheat grass | |
| Epilobium ciliatum subsp. watsonii | (ssp. ciliatum is more common) | CNPS-EB: A1 | San Francisco willowherb |
| Equisetum laevigatum | CNPS-EB: A2 | smooth scouring rush | |
| Eragrostis mexicana subsp. virescens | CNPS-EB: A1x | Orcutt's eragrostis | |
| Eriogonum fasciculatum var. foliolosum | CNPS-EB: A1 | leafy California buckwheat, California buckwheat | |
| Eriophyllum lanatum var. achilleoides | CNPS-EB: C | woolly sunflower | |
| Festuca elmeri | CNPS-EB: A1 | Elmer's fescue | |
| Githopsis diffusa subsp. robusta | CNPS-EB: A2 | southern bluecup | |
| Gutierrezia californica | CNPS-EB: C | California matchweed | |
| Helianthus californicus | CNPS-EB: C | California sunflower | |
| Hemizonia congesta subsp. lutescens | CNPS-EB: B | hayfield tarweed | |
| Hoita macrostachya | CNPS-EB: B | California hemp | |
| Iris longipetala | CNPS-EB: *A1 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | coast iris | |
| Juncus phaeocephalus var. paniculatus | CNPS-EB: B | panicled rush, brown-headed rush | |
| Juncus phaeocephalus var. unknown | CNPS-EB: A2? | brown-headed rush | |
| Leptosiphon liniflorus | (formerly Linanthus l.) | CNPS-EB: A1 | flax-flowered linanthus, flax-flowered leptosiphon |
| Lithophragma bolanderi | CNPS-EB: A1 | Bolander starflower | |
| Lupinus littoralis var. variicolor | (formerly L. variicolor) | CNPS-EB: A1? | bluff lupine |
| Madia anomala | CNPS-EB: A1x | plump-seeded madia | |
| Micropus amphibolus | (historical - 1955) | CNPS-EB: *A1x State CNPS: 3.2 Global Rank: G3G4 CNDDB Rank: S3S4 | Mount Diablo cottonseed, Mt. Diablo cottonweed |
| Micropus californicus var. subvestitus | (var. californicus is more common) | CNPS-EB: A2 | slender cottonweed |
| Microseris campestris | CNPS-EB: A1 | San Joaquin microseris | |
| Morella californica | (formerly Myrica c.) | CNPS-EB: B | wax myrtle |
| Navarretia mellita | CNPS-EB: C | honey-scented navarretia | |
| Oenothera elata subsp. hookeri | CNPS-EB: B | evening-primrose | |
| Panicum capillare | CNPS-EB: A2 | witch grass | |
| Phacelia divaricata | CNPS-EB: B | divaricate phacelia | |
| Phacelia tanacetifolia | CNPS-EB: B | tansy phacelia | |
| Phalaris californica | (historical-1943) | CNPS-EB: A1x | California canary grass |
| Piperia unalascensis | CNPS-EB: A1 | Alaska piperia, slender-spire orchid | |
| Plagiobothrys tenellus | CNPS-EB: B | Pacific popcornflower, slender popcornflower | |
| Plagiobothrys trachycarpus | CNPS-EB: C | rough-nutlet popcornflower, rough-fruited allocarya | |
| Platanus racemosa | CNPS-EB: C | western sycamore, California sycamore | |
| Populus trichocarpa | (formerly P. balsamifera var. | CNPS-EB: C | black cottonwood |
| Prunella vulgaris var. lanceolata | (var. vulgaris is more common) | CNPS-EB: B | selfheal |
| Prunus ilicifolia subsp. ilicifolia | CNPS-EB: B | islay, holly-leafed cherry | |
| Psilocarphus brevissimus var. brevissimus | CNPS-EB: B | dwarf woollyheads, dwarf woolly-marbles | |
| Quercus wislizeni var. frutescens | CNPS-EB: C | shrubby interior live oak | |
| Ranunculus orthorhynchus var. bloomeri | CNPS-EB: A1x | Bloomer's buttercup | |
| Ribes malvaceum var. malvaceum | CNPS-EB: C | chaparral currant | |
| Rosa spithamea | CNPS-EB: C | coast ground rose, ground rose | |
| Rumex californicus | (formerly R. salicifolius var. dentatus) | CNPS-EB: C | willow dock |
| Rumex fueginus | CNPS-EB: A2 | golden dock | |
| Rumex salicifolius | (formerly R. salicifolius var. salicifolius) | CNPS-EB: B | willow dock |
| Rumex salicifolius var. unknown | CNPS-EB: A2? | willow dock | |
| Sagittaria latifolia | CNPS-EB: A1 | arrowhead | |
| Sanicula arctopoides | CNPS-EB: A1x | footsteps of spring, yellow mats | |
| Scutellaria tuberosa | CNPS-EB: C | Dannie's skullcap | |
| Sedum spathulifolium | CNPS-EB: B | broadleaf stonecrop, Pacific stonecrop | |
| Spiranthes porrifolia | CNPS-EB: A1x | western ladies' tresses | |
| Stephanomeria elata | CNPS-EB: A2 | stephanomeria | |
| Streptanthus albidus subsp. peramoenus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2T2 CNDDB Rank: S2 | most beautiful jewel-flower | |
| Symphyotrichum lanceolatum var. hesperium | (formerly Aster lanceolatus ss | CNPS-EB: A2 | marsh aster |
| Trifolium barbigerum | CNPS-EB: A2 | bearded clover | |
| Trifolium macraei | CNPS-EB: A1 | Macrae's clover, double-headed clover | |
| Triglochin maritima | CNPS-EB: C | common arrow-grass, seaside arrow-grass | |
| Triglochin scilloides | CNPS-EB: C | flowering-quillwort | |
| Trillium ovatum subsp. ovatum | CNPS-EB: A2 | white trillium | |
| Triodanis biflora | CNPS-EB: A2 | Venus' looking-glass | |
| Triphysaria versicolor subsp. faucibarbata | CNPS-EB: B | smooth owl's-clover | |
| Trisetum canescens | CNPS-EB: A2 | tall trisetum | |
| Tropidocarpum gracile | CNPS-EB: B | slender tropidocarpum |