| Acaena californica | (formerly A. pinnatifida var. californica) | C | California acaena |
| Acmispon strigosus | | C | strigose trefoil |
| Agoseris heterophylla var. cryptopleura | | C | |
| Agoseris heterophylla var. heterophylla | | C | |
| Amaranthus blitoides | | C | procumbent pigweed, prostrate amaranth |
| Ambrosia chamissonis | | C | beach bur-sage, beach-bur |
| Amelanchier utahensis | | C | Utah service-berry |
| Anisocarpus madioides | (formerly Madia m.) | C | woodland tarweed, woodland madia |
| Apiastrum angustifolium | | C | wild celery |
| Atriplex argentea var. expansa | | C | silverscale |
| Berula erecta | | C | cutleaf water-parsnip |
| Bolboschoenus maritimus subsp. paludosus | (formerly Scirpus m.) | C | bulrush |
| Carex barbarae | | C | whiteroot sedge, Santa Barbara sedge, St. Barbara's sedge |
| Carex nudata | | C | torrent sedge |
| Clarkia concinna subsp. concinna | | C | large godetia |
| Clarkia gracilis subsp. gracilis | | C | summer's darling |
| 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 |
| Cordylanthus pilosus subsp. pilosus | | C | hairy bird's-beak |
| 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 subinclusa | | C | canyon dodder |
| Deinandra lobbii | (formerly Hemizonia l.) | C | three-rayed tarweed |
| Epilobium campestre | | C | smooth boisduvalia |
| Erigeron philadelphicus var. philadelphicus | | C | fleabane |
| Eriogonum luteolum var. luteolum | | C | golden-carpet wild buckwheat, golden carpet |
| Eriogonum wrightii var. trachygonum | | C | rough-node bastard-sage, Wright's eriogonum |
| Eriophyllum lanatum var. achilleoides | | C | woolly sunflower |
| Erythranthe nasuta | | C | shy monkeyflower |
| Euphorbia serpillifolia subsp. serpillifolia | | C | thyme-leaved spurge |
| Frangula californica subsp. tomentella | (formerly Rhamnus t.) | C | hoary coffeeberry |
| Galium triflorum | | C | sweet-scented bedstraw |
| Gilia tricolor subsp. diffusa | | C | birds-eye gilia |
| Gruvelia pusilla | (formerly Pectocarya pusilla) | C | little pectocarya |
| Helianthus californicus | | C | California sunflower |
| Heterotheca sessiliflora subsp. bolanderi | H. s. ssp. echioides is more common | C | Bolander goldenaster |
| Hoita macrostachya | | C | California hemp |
| Juncus mexicanus | | C | Mexican rush |
| Juncus phaeocephalus var. phaeocephalus | | C | brownheaded rush |
| Lepechinia calycina | | C | pitcher sage |
| Lepidium acutidens | | C | sharp-toothed pepper-grass |
| Oenothera elata subsp. hookeri | | C | evening-primrose |
| Persicaria punctata | (formerly Polygonum punctatum) | C | water smartweed |
| Plagiobothrys canescens var. canescens | | C | valley popcornflower |
| Plagiobothrys tenellus | | C | Pacific popcornflower, slender popcornflower |
| Plagiobothrys trachycarpus | | C | rough-nutlet popcornflower, rough-fruited allocarya |
| 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 |
| Ranunculus canus var. canus | | C | Sacramento Valley buttercup |
| Ribes divaricatum var. pubiflorum | | C | straggle bush, straggly gooseberry |
| Selaginella bigelovii | | C | spike-moss |
| Silene laciniata subsp. californica | (formerly Silene c.) | C | Indian pink, California pink, California Indian pink |
| Thysanocarpus laciniatus | | C | lacepod |
| Trifolium columbinum | | C | olive clover |
| Trifolium depauperatum var. depauperatum | (vars. amplectens and truncatu | C | dwarf sack clover |
| Triglochin scilloides | | C | flowering-quillwort |
| Viola purpurea subsp. quercetorum | | C | mountain violet |