| 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 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 |
| Triglochin striata | (T. maritima is more common) | CNPS-EB: B | three-ribbed arrow-grass |
| Amaranthus blitoides | CNPS-EB: C | procumbent pigweed, prostrate amaranth | |
| Amsinckia tessellata var. tessellata | CNPS-EB: A1 | desert fiddleneck, devil's lettuce | |
| Atriplex argentea var. expansa | CNPS-EB: B | silverscale | |
| 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 | |
| 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? | ||
| Cryptantha hooveri | (historical-1908) | CNPS-EB: *A1x State CNPS: 1A Global Rank: GH CNDDB Rank: SH | Hoover's cryptantha |
| Cuscuta californica var. californica | CNPS-EB: A2 | California dodder | |
| Cuscuta campestris | CNPS-EB: A1 | field dodder | |
| Eleocharis parvula | CNPS-EB: *A1 State CNPS: 4.3 Global Rank: G5 CNDDB Rank: S3 | small spikerush | |
| Equisetum laevigatum | CNPS-EB: A2 | smooth scouring rush | |
| Eriogonum gracile var. gracile | CNPS-EB: C | slender woolly wild buckwheat, slender buckwheat | |
| Hemizonia congesta subsp. lutescens | CNPS-EB: B | hayfield tarweed | |
| Hesperomecon linearis | (formerly Meconella l.) (hist | CNPS-EB: A1x | narrow-leaved meconella |
| Hoita macrostachya | CNPS-EB: B | California hemp | |
| Juncus articulatus subsp. articulatus | CNPS-EB: A1x | jointed rush | |
| Juncus ensifolius | Unclear if it occurs in East Bay | CNPS-EB: A1? | dagger rush, swordleaved rush, three-stamened rush |
| Lastarriaea coriacea | CNPS-EB: A2 | leather-spineflower, lastarriaea | |
| 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 | |
| Leptosyne stillmanii | (formerly Coreopsis s.) | CNPS-EB: A1x | Stillman's coreopsis |
| Lupinus chamissonis | (historical-1963) | CNPS-EB: A1x | Chamisso's bush lupine |
| Malacothrix floccifera | CNPS-EB: C | woolly malacothrix | |
| Monolepis nuttalliana | CNPS-EB: A1 | Nuttall's poverty weed, poverty weed | |
| Nemophila pedunculata | CNPS-EB: B | meadow nemophila | |
| Pectocarya penicillata | CNPS-EB: A2 | northern pectocarya, winged pectocarya | |
| Penstemon centranthifolius | CNPS-EB: B | scarlet bugler | |
| Persicaria lapathifolia | (formerly Polygonum lapathifol | CNPS-EB: B | willow weed |
| Phacelia douglasii | CNPS-EB: A1 | Douglas' phacelia | |
| Phacelia tanacetifolia | CNPS-EB: B | tansy phacelia | |
| Plagiobothrys tenellus | CNPS-EB: B | Pacific popcornflower, slender popcornflower | |
| Sabulina californica | (formerly Minuartia californica) | CNPS-EB: A1 | California sandwort |
| Sagittaria latifolia | CNPS-EB: A1 | arrowhead | |
| Tetrapteron graciliflorum | CNPS-EB: C | hill sun cup | |
| Tropidocarpum gracile | CNPS-EB: B | slender tropidocarpum |