| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Alisma triviale | (formerly A. plantago-aquatica | CNPS-EB: C | water plantain |
| Amaranthus blitoides | CNPS-EB: C | procumbent pigweed, prostrate amaranth | |
| Anemopsis californica | CNPS-EB: B | yerba mansa, lizard tail | |
| Apocynum androsaemifolium | CNPS-EB: A2 | bitter dogbane, dogbane | |
| Apocynum cannabinum | CNPS-EB: B | dogbane, Indian-hemp | |
| Asclepias cordifolia | (A. californica is more common | CNPS-EB: A1 | purple milkweed |
| Astragalus asymmetricus | CNPS-EB: C | San Joaquin locoweeed | |
| Bidens frondosa | CNPS-EB: B | sticktight | |
| Bolboschoenus maritimus subsp. paludosus | (formerly Scirpus m.) | CNPS-EB: C | bulrush |
| Calystegia sepium subsp. limnophila | CNPS-EB: B | hedge bindweed | |
| Carex aquatilis var. dives | CNPS-EB: A1 | Sitka sedge | |
| Carex obnupta | CNPS-EB: B | slough sedge | |
| Centromadia parryi subsp. congdonii | (formerly Hemizonia p. ssp. c. | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G3T2 CNDDB Rank: S2 | Congdon's tarplant |
| Chloropyron molle subsp. molle | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2T1 CNDDB Rank: S1 FESA Status: FE CESA Status: CR | soft salty bird's-beak, soft bird's-beak | |
| Clarkia concinna subsp. concinna | CNPS-EB: C | large godetia | |
| Cordylanthus pilosus subsp. pilosus | CNPS-EB: B | hairy bird's-beak | |
| Cucurbita foetidissima | CNPS-EB: A1 | buffalo gourd, calabazilla, calabazilla | |
| Cuscuta californica var. californica | CNPS-EB: A2 | California dodder | |
| Cuscuta pacifica var. pacifica | (formerly C. salina var. major) | CNPS-EB: C | salt-marsh dodder |
| Cuscuta subinclusa | CNPS-EB: C | canyon dodder | |
| Deinandra lobbii | (formerly Hemizonia l.) | CNPS-EB: C | three-rayed tarweed |
| Deschampsia cespitosa subsp. holciformis | CNPS-EB: B | tufted hairgrass | |
| Epilobium torreyi | CNPS-EB: A2 | narrow-leaved boisduvalia | |
| Eriophyllum lanatum var. achilleoides | CNPS-EB: C | woolly sunflower | |
| Eryngium articulatum | CNPS-EB: A1 | beethistle, coyote-thistle | |
| Euphorbia ocellata subsp. ocellata | CNPS-EB: B | valley spurge | |
| Extriplex joaquinana | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | San Joaquin spearscale, San Joaquin saltbush | |
| Forestiera pubescens | CNPS-EB: B | desert olive | |
| Fraxinus latifolia | CNPS-EB: B | Oregon ash | |
| Gilia capitata subsp. staminea | CNPS-EB: C | blue field gilia | |
| Glycyrrhiza lepidota | CNPS-EB: C | wild licorice | |
| Helenium bigelovii | (H. puberulum is more common) | CNPS-EB: A2 | Bigelow's sneezeweed |
| Helianthus californicus | CNPS-EB: C | California sunflower | |
| Heterotheca sessiliflora subsp. bolanderi | (H. s. ssp. echioides is more | CNPS-EB: C | Bolander goldenaster |
| Hordeum jubatum subsp. jubatum | CNPS-EB: A2 | foxtail barley, squirreltail barley | |
| Isolepis cernua | (formerly Scirpus cernuus) | CNPS-EB: C | low club-rush |
| Juncus phaeocephalus var. paniculatus | CNPS-EB: B | panicled rush, brown-headed rush | |
| Koeleria macrantha | CNPS-EB: C | june grass | |
| Lasthenia glabrata subsp. glabrata | CNPS-EB: A2 | yellow-ray goldfields | |
| Lathyrus jepsonii var. californicus | CNPS-EB: B | buff pea | |
| Lathyrus jepsonii var. jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | delta tule pea, Delta tule pea | |
| Layia platyglossa | CNPS-EB: B | tidy-tips | |
| Lepechinia calycina | CNPS-EB: C | pitcher sage | |
| Lepidium latipes | CNPS-EB: B | dwarf peppergrass | |
| Lilaeopsis masonii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | Mason's lilaeopsis | |
| Limonium californicum | CNPS-EB: C | western marsh-rosemary, sea-lavender, ma | |
| Lupinus pachylobus | CNPS-EB: B | big pod lupine | |
| Lycopus americanus | CNPS-EB: A2 | cutleaf bugleweed | |
| Lysimachia maritima | CNPS-EB: A1 | sea-milkwort | |
| Lythrum californicum | CNPS-EB: B | California loosestrife | |
| Marah oregana | CNPS-EB: B | coast man-root | |
| Melica californica | CNPS-EB: C | California melic | |
| Mentha canadensis | CNPS-EB: B | American cornmint, Japanese peppermint | |
| Mentzelia dispersa | CNPS-EB: A2 | Nada stick-leaf | |
| Panicum capillare | CNPS-EB: A2 | witch grass | |
| Penstemon centranthifolius | CNPS-EB: B | scarlet bugler | |
| Persicaria lapathifolia | (formerly Polygonum lapathifol | CNPS-EB: B | willow weed |
| Persicaria punctata | (formerly Polygonum punctatum) | CNPS-EB: C | water smartweed |
| Phoradendron leucarpum subsp. macrophyllum | (formerly P. serotinum subsp. macrophyllum, P. macrophyllum) | CNPS-EB: C | big leaf mistletoe |
| Phragmites australis | CNPS-EB: C | common reed | |
| Plagiobothrys fulvus var. campestris | CNPS-EB: B | field popcornflower, fulvous popcornflower | |
| 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 | |
| Prunus ilicifolia subsp. ilicifolia | CNPS-EB: B | islay, holly-leafed cherry | |
| Pseudognaphalium beneolens | (formerly Gnaphalium canescens | CNPS-EB: C | fragrant everlasting |
| Pseudognaphalium microcephalum | (formerly Gnaphalium canescens | CNPS-EB: A1 | white everlasting |
| Quercus lobata | CNPS-EB: B | valley oak, roble | |
| Ranunculus canus var. canus | CNPS-EB: C | Sacramento Valley buttercup | |
| Ranunculus occidentalis var. occidentalis | CNPS-EB: B | western buttercup | |
| Rhus aromatica | (formerly R. trilobata) | CNPS-EB: C | skunk bush, skunkbrush, squawbush |
| Rumex crassus | (formerly R. salicifolius var. crassus | CNPS-EB: A2 | willow dock |
| Rumex occidentalis | CNPS-EB: A2 | western dock | |
| Scirpus microcarpus | CNPS-EB: C | small-fruited bulrush | |
| Senecio hydrophilus | CNPS-EB: A2 | water ragwort, alkali-marsh ragwort, alkali-marsh butterweed | |
| Sesuvium verrucosum | CNPS-EB: B | western sea-purslane, sea-purslane | |
| Setaria parviflora | CNPS-EB: B | knotroot bristle grass, perennial foxtail | |
| Spartina foliosa | CNPS-EB: B | California cord grass | |
| Stachys ajugoides | (var. rigida is more common) | CNPS-EB: A2 | bugle hedge nettle |
| Stachys albens | CNPS-EB: B | white hedge nettle | |
| Stipa cernua | CNPS-EB: C | nodding needlegrass | |
| Stipa pulchra | CNPS-EB: C | purple needlegrass | |
| 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 |
| Trifolium fucatum | CNPS-EB: B | bull clover | |
| Trifolium oliganthum | CNPS-EB: C | few-flowered clover | |
| Triglochin maritima | CNPS-EB: C | common arrow-grass, seaside arrow-grass | |
| Triglochin striata | (T. maritima is more common) | CNPS-EB: B | three-ribbed arrow-grass |
| Wolffia brasiliensis | CNPS-EB: *A1 State CNPS: 2B.3 Global Rank: G5 CNDDB Rank: S2 | BRAZILIAN WATERMEAL | |
| Wyethia glabra | (W. helenioides is more common | CNPS-EB: C | mule ears |
| Allium crispum | CNPS-EB: A1 | crinkled onion | |
| Alopecurus saccatus | CNPS-EB: B | Howell's meadow foxtail | |
| Amsinckia tessellata var. gloriosa | CNPS-EB: A1 | carrizo fiddleneck, tessellate fiddleneck | |
| Amsinckia tessellata var. tessellata | CNPS-EB: A1 | desert fiddleneck, devil's lettuce | |
| Androsace elongata subsp. acuta | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5?T3T4 CNDDB Rank: S3S4 | California androsace | |
| Arctostaphylos glandulosa subsp. glandulosa | CNPS-EB: B | Eastwood manzanita | |
| Astragalus didymocarpus var. didymocarpus | (A. gambelianus is more common | CNPS-EB: A1 | two-seeded milkvetch |
| Bidens laevis | CNPS-EB: A2 | bur-marigold | |
| 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 | |
| California macrophylla | (formerly Erodium macrophyllum | CNPS-EB: B | round-leaved filaree |
| Calochortus umbellatus | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3? CNDDB Rank: S3? | Oakland star-tulip | |
| Carex multicostata | CNPS-EB: A1 | many-ribbed sedge | |
| Carex praegracilis | CNPS-EB: C | black creeper sedge, freeway sedge, deer-bed sedge | |
| Castilleja ambigua subsp. ambigua | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5T4 CNDDB Rank: S3S4 | Johnny-nip | |
| Castilleja subinclusa subsp. franciscana | CNPS-EB: A1 | Franciscan indian paintbrush | |
| Caulanthus flavescens | CNPS-EB: A2 | yellow-flowered thelypodium | |
| 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 | |
| Cicuta maculata var. bolanderi | CNPS-EB: *A1 State CNPS: 2B.1 Global Rank: G5T4T5 CNDDB Rank: S2? | Bolander's water-hemlock, water hemlock | |
| Cirsium quercetorum | CNPS-EB: A2 | brownie thistle | |
| Collinsia bartsiifolia var. bartsiifolia | CNPS-EB: A1x | white Chinese houses | |
| Collinsia sparsiflora var. sparsiflora | CNPS-EB: C | few-flowered blue-eyed Mary | |
| Cornus glabrata | CNPS-EB: A1 | brown dogwood | |
| Delphinium variegatum subsp. variegatum | CNPS-EB: C | royal larkspur | |
| Deschampsia cespitosa subsp. cespitosa | CNPS-EB: C | tufted hairgrass | |
| Diplacus tricolor | (formerly Mimulus tricolor) | CNPS-EB: A1x | tricolor monkeyflower |
| Downingia ornatissima var. mirabilis | (historical-1956; formerly D. ornatissima var. eximia) | CNPS-EB: A1x | Solano downingia |
| Downingia pulchella | CNPS-EB: B | flat-faced downingia | |
| Elatine brachysperma | CNPS-EB: A1 | waterwort | |
| Festuca californica | CNPS-EB: C | California fescue | |
| Gilia tricolor subsp. unknown | CNPS-EB: B? | birds-eye gilia | |
| Githopsis specularioides | CNPS-EB: B | common bluecup | |
| Hoita macrostachya | CNPS-EB: B | California hemp | |
| Horkelia californica var. frondosa | CNPS-EB: B | leafy horkelia | |
| Lasthenia conjugens | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE | Contra Costa goldfields | |
| Lasthenia glaberrima | CNPS-EB: B | smooth goldfields | |
| Lasthenia microglossa | CNPS-EB: A2 | small-ray goldfields | |
| Lasthenia minor | CNPS-EB: A1 | coastal goldfields, woolly goldfields | |
| Layia glandulosa | (historical-1983 but not seen | CNPS-EB: A1x | white layia |
| Lepidium acutidens | CNPS-EB: C | sharp-toothed pepper-grass | |
| Lepidium oxycarpum | CNPS-EB: A2 | sharp-podded pepper-grass | |
| Leptochloa fusca subsp. fascicularis | CNPS-EB: A1 | bearded sprangletop | |
| Limnanthes douglasii subsp. douglasii | CNPS-EB: A1 | meadowfoam | |
| Limnanthes douglasii subsp. nivea | CNPS-EB: A1x | meadowfoam | |
| Linanthus dichotomus subsp. meridianus | CNPS-EB: A1 | ||
| Linum lewisii var. lewisii | (historical-1936) | CNPS-EB: A1x | western blue flax |
| Lupinus affinis | CNPS-EB: A1 | lupine | |
| Lupinus luteolus | CNPS-EB: A1x | butter lupine | |
| Malacothrix coulteri | CNPS-EB: A1 | snake's-head | |
| Micropus amphibolus | (historical - 1955) | CNPS-EB: *A1x State CNPS: 3.2 Global Rank: G3G4 CNDDB Rank: S3S4 | Mount Diablo cottonseed, Mt. Diablo cottonweed |
| Microseris elegans | CNPS-EB: A1 | elegant microseris | |
| Monolopia major | CNPS-EB: B | cupped monolopia | |
| Muilla maritima | CNPS-EB: B | common muilla | |
| Navarretia cotulifolia | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | cotula navarretia | |
| Navarretia viscidula | CNPS-EB: A2 | sticky navarretia | |
| Pentachaeta alsinoides | CNPS-EB: C | tiny pentachaeta | |
| Phacelia tanacetifolia | CNPS-EB: B | tansy phacelia | |
| Plagiobothrys infectivus | CNPS-EB: A1x | dye popcornflower | |
| Plagiobothrys trachycarpus | CNPS-EB: C | rough-nutlet popcornflower, rough-fruited allocarya | |
| Plantago elongata | CNPS-EB: B | annual coast plantain | |
| Pleuropogon californicus var. californicus | CNPS-EB: B | semaphore grass | |
| Pogogyne douglasii | (historical-1940) | CNPS-EB: A1x | Douglas' beardstyle, Douglas pogogyne |
| Sabulina californica | (formerly Minuartia californica) | CNPS-EB: A1 | California sandwort |
| Sidalcea diploscypha | CNPS-EB: A1 | fringed checkerbloom, fringed sidalcea | |
| Silene antirrhina | CNPS-EB: A1 | sleepy catchfly, snapdragon catchfly | |
| Spergularia macrotheca var. leucantha | CNPS-EB: A2 | large-flowered sand spurry | |
| Sporobolus airoides | CNPS-EB: A1 | alkali sacaton | |
| Stephanomeria elata | CNPS-EB: A1 | stephanomeria | |
| Tetrapteron graciliflorum | CNPS-EB: C | hill sun cup | |
| Trifolium dichotomum | CNPS-EB: C | branched indian clover | |
| Trifolium obtusiflorum | CNPS-EB: B | clammy clover, creek clover | |
| Trifolium olivaceum | CNPS-EB: C | olive clover | |
| Trifolium wormskioldii | CNPS-EB: A1 | cow clover | |
| Triglochin scilloides | CNPS-EB: C | flowering-quillwort | |
| Tropidocarpum capparideum | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | caper-fruited tropidocarpum | |
| Tropidocarpum gracile | CNPS-EB: B | slender tropidocarpum | |
| Vicia hassei | CNPS-EB: A2 | slender vetch |