| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Acmispon strigosus | CNPS-EB: B | strigose trefoil | |
| Apocynum cannabinum | CNPS-EB: B | dogbane, Indian-hemp | |
| Bidens frondosa | CNPS-EB: B | sticktight | |
| Bidens laevis | CNPS-EB: A2 | bur-marigold | |
| Calystegia sepium subsp. limnophila | CNPS-EB: B | hedge bindweed | |
| Camissonia contorta | CNPS-EB: C | contorted primrose | |
| Camissoniopsis micrantha | CNPS-EB: C | small primrose | |
| Carex nebrascensis | CNPS-EB: B | Nebraska sedge | |
| Cephalanthus occidentalis | CNPS-EB: A2 | button bush | |
| Chenopodium berlandieri var. sinuatum | CNPS-EB: A1 | ||
| Chenopodium pratericola | CNPS-EB: A1 | ||
| Croton californicus | CNPS-EB: A2 | California croton | |
| Cyperus niger | CNPS-EB: A2 | black sedge | |
| Cyperus strigosus | CNPS-EB: A1 | false nutsedge, straw-colored cyperus | |
| Deinandra kelloggii | (formerly Hemizonia k.) | CNPS-EB: A2 | Kellogg's tarweed |
| Deschampsia cespitosa subsp. cespitosa | CNPS-EB: C | tufted hairgrass | |
| Deschampsia cespitosa subsp. holciformis | CNPS-EB: B | tufted hairgrass | |
| Epilobium campestre | CNPS-EB: B | smooth boisduvalia | |
| Eriogonum nudum var. psychicola | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 | Antioch Dunes buckwheat | |
| Eryngium articulatum | CNPS-EB: A1 | beethistle, coyote-thistle | |
| Erysimum capitatum var. angustatum | (ssp. capitatum is more common | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | Contra Costa wallflower |
| Fraxinus latifolia | CNPS-EB: B | Oregon ash | |
| Galium trifidum subsp. columbianum | CNPS-EB: A1 | trifid bedstraw | |
| Gilia capitata subsp. staminea | CNPS-EB: C | blue field gilia | |
| Gutierrezia californica | CNPS-EB: C | California matchweed | |
| Helenium bigelovii | (H. puberulum is more common) | CNPS-EB: A2 | Bigelow's sneezeweed |
| Hydrocotyle ranunculoides | CNPS-EB: A2 | floating marsh pennywort | |
| Hydrocotyle verticillata | CNPS-EB: B | whorled marsh pennywort | |
| Isolepis cernua | (formerly Scirpus cernuus) | CNPS-EB: C | low club-rush |
| Juncus lescurii | CNPS-EB: A1 | San Francisco rush, salt rush | |
| Juncus mexicanus | CNPS-EB: C | Mexican rush | |
| Juncus oxymeris | CNPS-EB: A1 | pointed rush | |
| Lathyrus jepsonii var. jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | delta tule pea, Delta tule pea | |
| Lessingia pectinata var. tenuipes | CNPS-EB: A2 | valley lessingia | |
| Lilaeopsis masonii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | Mason's lilaeopsis | |
| Lycopus americanus | CNPS-EB: A2 | cutleaf bugleweed | |
| Lythrum californicum | CNPS-EB: B | California loosestrife | |
| Mentha canadensis | CNPS-EB: B | American cornmint, Japanese peppermint | |
| Myosotis laxa | CNPS-EB: A1x | BAY FORGET-ME-NOT | |
| Oenothera deltoides subsp. howellii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | Antioch Dunes evening-primrose | |
| Oenothera elata subsp. hookeri | CNPS-EB: C | evening-primrose | |
| Panicum capillare | CNPS-EB: A2 | witch grass | |
| Persicaria lapathifolia | (formerly Polygonum lapathifol | CNPS-EB: B | willow weed |
| Persicaria punctata | (formerly Polygonum punctatum) | CNPS-EB: C | water smartweed |
| Phalaris arundinacea | CNPS-EB: A1 | reed canary grass | |
| Phragmites australis | CNPS-EB: C | common reed | |
| Plantago subnuda | CNPS-EB: A2 | Mexican plantain | |
| Platanus racemosa | CNPS-EB: C | western sycamore, California sycamore | |
| Pluchea odorata var. odorata | CNPS-EB: B | saltmarsh fleabane | |
| Potentilla anserina subsp. pacifica | CNPS-EB: A2 | Pacific silverweed | |
| Pseudognaphalium beneolens | (formerly Gnaphalium canescens | CNPS-EB: C | fragrant everlasting |
| Quercus agrifolia x wislizeni | CNPS-EB: A1 | coast live oak x interior live oak | |
| Rorippa curvisiliqua | CNPS-EB: B | yellow cress | |
| Rumex occidentalis | CNPS-EB: A2 | western dock | |
| Samolus parviflorus | CNPS-EB: A1 | seaside brookweed, water-pimpernel | |
| Senecio flaccidus var. douglasii | CNPS-EB: A2 | Douglas' threadleaf ragwort, shrubby butterweed | |
| Senecio hydrophilus | CNPS-EB: A2 | water ragwort, alkali-marsh ragwort, alkali-marsh butterweed | |
| Setaria parviflora | CNPS-EB: B | knotroot bristle grass, perennial foxtail | |
| Sium suave | CNPS-EB: A1 | hemlock water-parsnip | |
| Sparganium eurycarpum var. eurycarpum | CNPS-EB: A1 | bur-reed | |
| Stachys albens | CNPS-EB: B | white hedge nettle | |
| Symphyotrichum lentum | (formerly Aster lentus) | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Suisun marsh aster |
| Symphyotrichum subulatum var. parviflorum | (formerly Aster subulatus var. | CNPS-EB: B | slim aster |
| Triglochin striata | (T. maritima is more common) | CNPS-EB: B | three-ribbed arrow-grass |
| Allenrolfea occidentalis | CNPS-EB: C | iodine bush | |
| Allium peninsulare var. peninsulare | (historical-1954) | CNPS-EB: A1x | peninsular onion |
| Amaranthus blitoides | CNPS-EB: C | procumbent pigweed, prostrate amaranth | |
| Ammannia coccinea | CNPS-EB: A1 | long-leaved ammannia | |
| Amsinckia grandiflora | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | large-flowered fiddleneck | |
| Amsinckia lycopsoides | CNPS-EB: C | bugloss-flowered fiddleneck, bugloss fiddleneck | |
| Amsinckia tessellata var. gloriosa | CNPS-EB: A1 | carrizo fiddleneck, tessellate fiddleneck | |
| Amsinckia tessellata var. tessellata | CNPS-EB: A1 | desert fiddleneck, devil's lettuce | |
| Ancistrocarphus filagineus | CNPS-EB: C | woolly fishhooks | |
| Aphyllon californicum subsp. jepsonii | CNPS-EB: A1 | Jepson broom-rape | |
| Arctostaphylos manzanita subsp. laevigata | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | Contra Costa manzanita | |
| Arctostaphylos manzanita subsp. manzanita | CNPS-EB: A2 | common manzanita | |
| Astragalus asymmetricus | CNPS-EB: C | San Joaquin locoweeed | |
| Astragalus didymocarpus var. didymocarpus | (A. gambelianus is more common | CNPS-EB: A1 | two-seeded milkvetch |
| Athysanus unilateralis | (formerly Heterodraba unilateralis) | CNPS-EB: A1 | heterodraba |
| Atriplex argentea var. expansa | CNPS-EB: B | silverscale | |
| Balsamorhiza deltoidea | CNPS-EB: B | deltoid balsamroot | |
| Blennosperma nanum var. nanum | CNPS-EB: C | blennosperma | |
| Blepharizonia plumosa | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1G2 CNDDB Rank: S1S2 | big tarplant | |
| Bolboschoenus fluviatilis | (formerly Scirpus f.) | CNPS-EB: A1x | river bulrush |
| California macrophylla | (formerly Erodium macrophyllum | CNPS-EB: B | round-leaved filaree |
| Calycadenia multiglandulosa | CNPS-EB: A2 | sticky calycadenia | |
| Camissonia campestris subsp. campestris | (historical-1940) | CNPS-EB: A1x | Mojave suncup |
| Camissonia strigulosa | CNPS-EB: A1 | contorted primrose | |
| Camissoniopsis cheiranthifolia subsp. cheiranthifolia | CNPS-EB: A1 | dune suncup | |
| Camissoniopsis intermedia | CNPS-EB: C | small primrose | |
| Carex aquatilis var. dives | CNPS-EB: A1 | Sitka sedge | |
| Caulanthus flavescens | CNPS-EB: A2 | yellow-flowered thelypodium | |
| Chaenactis glabriuscula var. glabriuscula | CNPS-EB: A1 | yellow pincushion | |
| Chaenactis glabriuscula var. megacephala | CNPS-EB: A1 | yellow pincushion | |
| Chenopodium rubrum var. rubrum | CNPS-EB: A1? | ||
| Chorizanthe polygonoides var. polygonoides | CNPS-EB: A1 | knotweed spineflower | |
| Clarkia epilobioides | CNPS-EB: A1 | ||
| Collinsia bartsiifolia var. bartsiifolia | CNPS-EB: A1x | white Chinese houses | |
| Cryptantha hooveri | (historical-1908) | CNPS-EB: *A1x State CNPS: 1A Global Rank: GH CNDDB Rank: SH | Hoover's cryptantha |
| Cryptantha micromeres | CNPS-EB: A2 | minute-flowered cryptantha | |
| Cryptantha microstachys | CNPS-EB: A2 | Tejon cryptantha | |
| Cuscuta californica var. californica | CNPS-EB: A2 | California dodder | |
| Cuscuta campestris | CNPS-EB: A1 | field dodder | |
| Delphinium parryi subsp. parryi | CNPS-EB: A2 | Parry's larkspur | |
| Delphinium variegatum subsp. variegatum | CNPS-EB: C | royal larkspur | |
| Descurainia pinnata subsp. brachycarpa | CNPS-EB: A1x | tansy mustard | |
| Downingia ornatissima var. mirabilis | (historical-1956; formerly D. ornatissima var. eximia) | CNPS-EB: A1x | Solano downingia |
| Elatine californica | CNPS-EB: A2 | waterwort | |
| Eleocharis parvula | CNPS-EB: *A1 State CNPS: 4.3 Global Rank: G5 CNDDB Rank: S3 | small spikerush | |
| Epilobium cleistogamum | CNPS-EB: A1 | cleistogamous boisduvalia | |
| Equisetum laevigatum | CNPS-EB: A2 | smooth scouring rush | |
| Eriastrum pluriflorum subsp. pluriflorum | CNPS-EB: A1 | many-flowered eriastrum | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Eriogonum gracile var. gracile | CNPS-EB: C | slender woolly wild buckwheat, slender buckwheat | |
| Eriogonum roseum | CNPS-EB: A2 | wand wild buckwheat, virgate buckwheat | |
| Eriogonum truncatum | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | Mount Diablo buckwheat | |
| Erythranthe latidens | (formerly Mimulus latidens) | CNPS-EB: A1 | broad-toothed monkeyflower |
| Eschscholzia rhombipetala | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | diamond-petaled California poppy | |
| Extriplex joaquinana | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | San Joaquin spearscale, San Joaquin saltbush | |
| Fritillaria agrestis | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | stinkbells | |
| Glyceria leptostachya | CNPS-EB: A1 | narrow manna grass, Davy's mannagrass | |
| Glycyrrhiza lepidota | CNPS-EB: C | wild licorice | |
| Hemizonia congesta subsp. lutescens | CNPS-EB: B | hayfield tarweed | |
| Hesperevax caulescens | (H. sparsiflora is more common | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | hogwallow starfish |
| Hesperolinon breweri | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Brewer's western flax | |
| Hesperomecon linearis | (formerly Meconella l.) (hist | CNPS-EB: A1x | narrow-leaved meconella |
| Heterotheca sessiliflora subsp. bolanderi | (H. s. ssp. echioides is more | CNPS-EB: C | Bolander goldenaster |
| Hoita macrostachya | CNPS-EB: B | California hemp | |
| Isoetes howellii | CNPS-EB: A1 | Howell's quillwort | |
| Isolepis carinata | (formerly Scirpus koilolepis) | CNPS-EB: A1 | dwarf club-rush |
| Juncus articulatus subsp. articulatus | CNPS-EB: A1x | jointed rush | |
| Juncus bufonius var. occidentalis | (historical-1895) (vars. bufon | CNPS-EB: A1x | western toad rush, toad rush |
| Juncus ensifolius | Unclear if it occurs in East Bay | CNPS-EB: A1? | dagger rush, swordleaved rush, three-stamened rush |
| Juncus phaeocephalus var. phaeocephalus | CNPS-EB: B | brownheaded rush | |
| Laennecia coulteri | (formerly Conyza c.) | CNPS-EB: A1 | Coulter's horseweed, Coulter's conyza |
| Lastarriaea coriacea | CNPS-EB: A2 | leather-spineflower, lastarriaea | |
| Lasthenia conjugens | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE | Contra Costa goldfields | |
| Lasthenia fremontii | CNPS-EB: A1 | Fremont's goldfields | |
| Lasthenia glaberrima | CNPS-EB: B | smooth goldfields | |
| Lasthenia glabrata subsp. glabrata | CNPS-EB: A2 | yellow-ray goldfields | |
| Lasthenia minor | CNPS-EB: A1 | coastal goldfields, woolly goldfields | |
| Layia chrysanthemoides | CNPS-EB: A2 | smooth layia | |
| Layia glandulosa | (historical-1983 but not seen | CNPS-EB: A1x | white layia |
| Layia platyglossa | CNPS-EB: B | tidy-tips | |
| Leersia oryzoides | CNPS-EB: A1 | rice cutgrass | |
| Lepidium acutidens | CNPS-EB: C | sharp-toothed pepper-grass | |
| 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 |
| Leptosyne stillmanii | (formerly Coreopsis s.) | CNPS-EB: A1x | Stillman's coreopsis |
| Lessingia nemaclada | CNPS-EB: A2 | slender-stemmed lessignia | |
| Lilium pardalinum subsp. pardalinum | CNPS-EB: A1 | leopard lily | |
| Lithophragma bolanderi | CNPS-EB: A1 | Bolander starflower | |
| Lithophragma cymbalaria | (historical-1895) | CNPS-EB: A1x | mission star |
| Lupinus affinis | CNPS-EB: A1 | lupine | |
| Lupinus arboreus | CNPS-EB: A2 | yellow bush lupine | |
| Lupinus chamissonis | (historical-1963) | CNPS-EB: A1x | Chamisso's bush lupine |
| Madia radiata | (historical-1941) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G3 CNDDB Rank: S3 | showy golden madia, showy madia |
| Malacothamnus fremontii var. fremontii | CNPS-EB: C | white-coat mallow | |
| Malacothrix californica | (historical-1895) | CNPS-EB: A1x | California malacothrix |
| Malacothrix clevelandii | CNPS-EB: A2 | Cleveland's malacothrix | |
| Malacothrix coulteri | CNPS-EB: A1 | snake's-head | |
| Malacothrix floccifera | CNPS-EB: C | woolly malacothrix | |
| Melica californica | CNPS-EB: C | California melic | |
| Micropus californicus var. subvestitus | (var. californicus is more common) | CNPS-EB: A2 | slender cottonweed |
| Microseris douglasii subsp. tenella | (subsp douglasii is more common) | CNPS-EB: A2 | silver puffs |
| Microseris sylvatica | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | sylvan microseris | |
| Monolepis nuttalliana | CNPS-EB: A1 | Nuttall's poverty weed, poverty weed | |
| Monolopia major | CNPS-EB: B | cupped monolopia | |
| Myosurus minimus subsp. apus | CNPS-EB: *A1? State CNPS: 3.1 Global Rank: G5T2Q CNDDB Rank: S2 | little mousetail | |
| Myosurus minimus subsp. minimus | CNPS-EB: C | common mouse-tail | |
| Myosurus sessilis | CNPS-EB: A1 | sessile mouse-tail | |
| Navarretia nigelliformis subsp. nigelliformis | CNPS-EB: *A2? State CNPS: 4.2 Global Rank: G4T3 CNDDB Rank: S3 | adobe navarretia | |
| Navarretia nigelliformis subsp. radians | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G4T2T3 CNDDB Rank: S2S3 | shining navarretia | |
| Navarretia viscidula | CNPS-EB: A2 | sticky navarretia | |
| Nemophila pedunculata | CNPS-EB: B | meadow nemophila | |
| Pectocarya penicillata | CNPS-EB: A2 | northern pectocarya, winged pectocarya | |
| Penstemon centranthifolius | CNPS-EB: B | scarlet bugler | |
| Persicaria hydropiperoides | (formerly Polygonum h.) | CNPS-EB: A2 | false waterpepper, water-pepper |
| Phacelia ciliata | CNPS-EB: B | Great Valley phacelia, Great Valley phacelia | |
| Phacelia douglasii | CNPS-EB: A1 | Douglas' phacelia | |
| Phacelia ramosissima | CNPS-EB: B | branching phacelia | |
| Phacelia tanacetifolia | CNPS-EB: B | tansy phacelia | |
| Pilularia americana | CNPS-EB: A1 | pillwort | |
| Plagiobothrys acanthocarpus | CNPS-EB: B | adobe popcornflower, adobe allocarya | |
| Plagiobothrys canescens var. canescens | CNPS-EB: C | valley popcornflower | |
| Plagiobothrys fulvus var. campestris | CNPS-EB: B | field popcornflower, fulvous popcornflower | |
| Plagiobothrys humistratus | CNPS-EB: A2 | low popcornflower, dwarf allocarya | |
| Plagiobothrys leptocladus | CNPS-EB: A1 | alkali plagiobothrys | |
| Plagiobothrys stipitatus var. stipitatus | (var. micranthus is more commo | CNPS-EB: C | showy great valley popcornflower, stipitate allocarya |
| Plagiobothrys tenellus | CNPS-EB: B | Pacific popcornflower, slender popcornflower | |
| Plagiobothrys trachycarpus | CNPS-EB: C | rough-nutlet popcornflower, rough-fruited allocarya | |
| Plantago elongata | CNPS-EB: B | annual coast plantain | |
| Pogogyne zizyphoroides | CNPS-EB: A2 | Sacramento beardstyle | |
| Psilocarphus brevissimus var. brevissimus | CNPS-EB: B | dwarf woollyheads, dwarf woolly-marbles | |
| Psilocarphus oregonus | CNPS-EB: A2 | Oregon woollyheads, Oregon woolly-marbles | |
| Sabulina californica | (formerly Minuartia californica) | CNPS-EB: A1 | California sandwort |
| Sagittaria latifolia | CNPS-EB: A1 | arrowhead | |
| Salvia carduacea | (historical-1946) | CNPS-EB: A1x | thistle sage |
| Stebbinsoseris heterocarpa | CNPS-EB: C | grassland silverpuffs, derived microseris | |
| Stellaria nitens | CNPS-EB: C | shining chickweed | |
| Stephanomeria elata | CNPS-EB: A1 | stephanomeria | |
| Stylocline gnaphaloides | CNPS-EB: B | everlasting neststraw, nest-straw | |
| Tetrapteron graciliflorum | CNPS-EB: C | hill sun cup | |
| Trifolium fucatum | CNPS-EB: B | bull clover | |
| Trifolium macraei | CNPS-EB: A1 | Macrae's clover, double-headed clover | |
| Trifolium olivaceum | CNPS-EB: C | olive clover | |
| Tropidocarpum gracile | CNPS-EB: B | slender tropidocarpum | |
| Verbena hastata | CNPS-EB: A1 | blue vervain |