| Acaena californica | (formerly A. pinnatifida var. californica) | C | California acaena |
| Agoseris heterophylla var. heterophylla | | C | |
| Alisma triviale | (formerly A. plantago-aquatica | C | water plantain |
| Amaranthus blitoides | | C | procumbent pigweed, prostrate amaranth |
| Ambrosia chamissonis | | C | beach bur-sage, beach-bur |
| Amelanchier utahensis | | C | Utah service-berry |
| Amsinckia lycopsoides | | C | bugloss-flowered fiddleneck, bugloss fiddleneck |
| Ancistrocarphus filagineus | | C | woolly fishhooks |
| Aphyllon purpureum | | C | naked broomrape |
| Apiastrum angustifolium | | C | wild celery |
| Arbutus menziesii | | C | Pacific madrone |
| Arctostaphylos crustacea subsp. crustacea | | C | brittleleaf manzanita |
| Arctostaphylos glauca | | C | big-berried manzanita |
| Astragalus asymmetricus | | C | San Joaquin locoweeed |
| Berula erecta | | C | cutleaf water-parsnip |
| Blennosperma nanum var. nanum | | C | blennosperma |
| Bolboschoenus maritimus subsp. paludosus | (formerly Scirpus m.) | C | bulrush |
| Brickellia californica | | C | California brickellbush, California brickellia |
| Carex barbarae | | C | whiteroot sedge, Santa Barbara sedge, St. Barbara's sedge |
| Carex praegracilis | | C | black creeper sedge, freeway sedge, deer-bed sedge |
| Carex serratodens | | C | saw-toothed sedge, bifid sedge |
| Clarkia concinna subsp. concinna | | C | large godetia |
| Clarkia gracilis subsp. gracilis | | C | summer's darling |
| Claytonia exigua subsp. exigua | | C | common montia |
| Clematis ligusticifolia | | C | western virgin's bower, virgin's bower |
| Collinsia sparsiflora var. sparsiflora | | C | few-flowered blue-eyed Mary |
| Collinsia sparsiflora var. unknown | | C? | few-flowered blue-eyed Mary |
| Corethrogyne filaginifolia | (formerly Lessingia f. var. f. | C | California aster |
| Cornus sericea subsp. occidentalis | | C | western dogwood |
| Cornus sericea subsp. sericea | | C | American dogwood |
| Cornus sericea subsp. unknown | | C? | American dogwood |
| Cuscuta pacifica var. pacifica | (formerly C. salina var. major) | C | salt-marsh dodder |
| Cuscuta subinclusa | | C | canyon dodder |
| Datisca glomerata | | C | durango root |
| Deinandra lobbii | (formerly Hemizonia l.) | C | three-rayed tarweed |
| Delphinium nudicaule | | C | red larkspur, orange larkspur |
| Delphinium variegatum subsp. variegatum | | C | royal larkspur |
| Erigeron philadelphicus var. philadelphicus | | C | fleabane |
| Eriogonum gracile var. gracile | | C | slender woolly wild buckwheat, slender buckwheat |
| Eriogonum wrightii var. trachygonum | | C | rough-node bastard-sage, Wright's eriogonum |
| Eriophyllum lanatum var. achilleoides | | C | woolly sunflower |
| Euphorbia serpillifolia subsp. serpillifolia | | C | thyme-leaved spurge |
| Gilia tricolor subsp. diffusa | | C | birds-eye gilia |
| Glycyrrhiza lepidota | | C | wild licorice |
| Heterotheca sessiliflora subsp. bolanderi | (H. s. ssp. echioides is more | C | Bolander goldenaster |
| Hieracium albiflorum | | C | white hawkweed |
| Isolepis cernua | (formerly Scirpus cernuus) | C | low club-rush |
| Juncus mexicanus | | C | Mexican rush |
| Juniperus californica | | C | California juniper |
| Keckiella corymbosa | | C | redwood penstemon |
| Lepechinia calycina | | C | pitcher sage |
| Lepidium acutidens | | C | sharp-toothed pepper-grass |
| Leptosiphon androsaceus | (formerly Linanthus a.) | C | common linanthus, common leptosiphon |
| Leptosiphon ciliatus | (formerly Linanthus c.) | C | whisker brush |
| Luzula macrantha | | C | |
| Madia exigua | | C | |
| Malacothrix floccifera | | C | woolly malacothrix |
| Navarretia mellita | | C | honey-scented navarretia |
| Navarretia pubescens | | C | downy navarretia |
| Oenothera elata subsp. hookeri | | C | evening-primrose |
| Osmorhiza brachypoda | | C | California cicely |
| Perideridia californica | | C | California yampah |
| Persicaria punctata | (formerly Polygonum punctatum) | C | water smartweed |
| Phoradendron leucarpum subsp. macrophyllum | (formerly P. serotinum subsp. macrophyllum, P. macrophyllum) | C | big leaf mistletoe |
| Piperia elegans subsp. elegans | | C | coast piperia, elegant piperia |
| Piperia elongata | | C | chaparral orchid, wood rein-orchid, elongate piperia |
| Plagiobothrys canescens var. canescens | | C | valley popcornflower |
| Plagiobothrys stipitatus var. stipitatus | (var. micranthus is more commo | C | showy great valley popcornflower, stipitate allocarya |
| Plagiobothrys trachycarpus | | C | rough-nutlet popcornflower, rough-fruited allocarya |
| Platanus racemosa | | C | western sycamore, California sycamore |
| Populus trichocarpa | (formerly P. balsamifera var. | C | black cottonwood |
| Prunus emarginata | | C | bitter cherry |
| Prunus subcordata | | C | Pacific plum, Sierra plum |
| Pseudognaphalium beneolens | (formerly Gnaphalium canescens | C | fragrant everlasting |
| Quercus berberidifolia | | C | scrub oak |
| Quercus lobata | | C | valley oak, roble |
| Quercus wislizeni var. frutescens | | C | shrubby interior live oak |
| Ranunculus canus var. canus | | C | Sacramento Valley buttercup |
| Rhus aromatica | (formerly R. trilobata) | C | skunk bush, skunkbrush, squawbush |
| Ribes divaricatum var. pubiflorum | | C | straggle bush, straggly gooseberry |
| Ribes malvaceum var. malvaceum | | C | chaparral currant |
| Rigiopappus leptocladus | | C | rigiopappus |
| Rosa spithamea | | C | coast ground rose, ground rose |
| Scirpus microcarpus | | C | small-fruited bulrush |
| Scutellaria tuberosa | | C | Dannie's skullcap |
| Silene laciniata subsp. californica | (formerly Silene c.) | C | Indian pink, California pink, California Indian pink |
| Stebbinsoseris heterocarpa | | C | grassland silverpuffs, derived microseris |
| Tellima grandiflora | | C | fringe cups |
| Trifolium dichotomum | | C | branched indian clover |
| Trifolium oliganthum | | C | few-flowered clover |
| Trifolium olivaceum | | C | olive clover |
| Triglochin maritima | | C | common arrow-grass, seaside arrow-grass |
| Triglochin scilloides | | C | flowering-quillwort |
| Viola purpurea subsp. quercetorum | | C | mountain violet |
| Wyethia glabra | (W. helenioides is more common | C | mule ears |