| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Acaena californica | (formerly A. pinnatifida var. californica) | CNPS-EB: C | California acaena |
| Alnus rubra | (A. rhombifolia is more common | CNPS-EB: A2 | red alder |
| Ammannia coccinea | CNPS-EB: A1 | long-leaved ammannia | |
| Arbutus menziesii | CNPS-EB: B | Pacific madrone | |
| Arctostaphylos crustacea subsp. crustacea | CNPS-EB: C | brittleleaf manzanita | |
| Asclepias eriocarpa | CNPS-EB: A1 | KOTOLO | |
| Asclepias speciosa | (A. californica is more common | CNPS-EB: B | showy milkweed, milkweed |
| Calochortus umbellatus | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3? CNDDB Rank: S3? | Oakland star-tulip | |
| Carex barbarae | CNPS-EB: C | whiteroot sedge, Santa Barbara sedge, St. Barbara's sedge | |
| Carex densa | CNPS-EB: B | dense sedge | |
| Carex nebrascensis | CNPS-EB: B | Nebraska sedge | |
| Carex obnupta | CNPS-EB: B | slough sedge | |
| Carex subbracteata | CNPS-EB: B | small-bracted sedge | |
| Castilleja wightii | CNPS-EB: B | Wight's indian paintbrush | |
| Clematis ligusticifolia | CNPS-EB: C | western virgin's bower, virgin's bower | |
| Corethrogyne filaginifolia | (formerly Lessingia f. var. f. | CNPS-EB: C | California aster |
| Cornus sericea subsp. occidentalis | CNPS-EB: C | western dogwood | |
| Cuscuta campestris | CNPS-EB: A1 | field dodder | |
| Cyperus erythrorhizos | CNPS-EB: B | red-rooted cyperus | |
| Delphinium nudicaule | CNPS-EB: C | red larkspur, orange larkspur | |
| Deschampsia cespitosa subsp. cespitosa | CNPS-EB: C | tufted hairgrass | |
| Dicentra formosa | CNPS-EB: A2 | Pacific bleeding heart, bleeding heart | |
| Echinodorus berteroi | CNPS-EB: A2 | burhead | |
| Eclipta prostrata | CNPS-EB: A1 | false daisy | |
| Eleocharis acicularis var. acicularis | CNPS-EB: B | needle spike-rush | |
| Epilobium ciliatum subsp. watsonii | (ssp. ciliatum is more common) | CNPS-EB: A1 | San Francisco willowherb |
| Euphorbia serpillifolia subsp. serpillifolia | CNPS-EB: C | thyme-leaved spurge | |
| Galium triflorum | CNPS-EB: C | sweet-scented bedstraw | |
| Hieracium albiflorum | CNPS-EB: C | white hawkweed | |
| Koeleria macrantha | CNPS-EB: C | june grass | |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Oxalis pilosa | (formerly O. albicans ssp. p.) | CNPS-EB: B | hairy wood-sorrel |
| Pentachaeta alsinoides | CNPS-EB: C | tiny pentachaeta | |
| Phoradendron leucarpum subsp. macrophyllum | (formerly P. serotinum subsp. macrophyllum, P. macrophyllum) | CNPS-EB: C | big leaf mistletoe |
| Piperia michaelii | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | Michael's rein-orchid | |
| Platanus racemosa | CNPS-EB: C | western sycamore, California sycamore | |
| Populus trichocarpa | (formerly P. balsamifera var. | CNPS-EB: C | black cottonwood |
| Prunus emarginata | CNPS-EB: C | bitter cherry | |
| Prunus ilicifolia subsp. ilicifolia | CNPS-EB: B | islay, holly-leafed cherry | |
| Ranunculus lobbii | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S3 | Lobb's aquatic buttercup | |
| Scirpus microcarpus | CNPS-EB: C | small-fruited bulrush | |
| Scutellaria tuberosa | CNPS-EB: C | Dannie's skullcap | |
| Sequoia sempervirens | CNPS-EB: C | coast redwood | |
| Sesuvium verrucosum | CNPS-EB: B | western sea-purslane, sea-purslane | |
| Silene laciniata subsp. californica | (formerly Silene c.) | CNPS-EB: C | Indian pink, California pink, California Indian pink |
| Stebbinsoseris heterocarpa | CNPS-EB: C | grassland silverpuffs, derived microseris | |
| Stipa lepida | CNPS-EB: C | foothill needlegrass | |
| Stipa pulchra | CNPS-EB: C | purple needlegrass | |
| Symphyotrichum subulatum var. parviflorum | (formerly Aster subulatus var. | CNPS-EB: B | slim aster |
| Tropidocarpum gracile | CNPS-EB: B | slender tropidocarpum | |
| Vaccinium ovatum | CNPS-EB: C | California huckleberry | |
| Amelanchier utahensis | CNPS-EB: C | Utah service-berry | |
| Amsinckia douglasiana | (historical-1938) | CNPS-EB: *A1x State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Douglas' fiddleneck |
| Apocynum androsaemifolium | CNPS-EB: A2 | bitter dogbane, dogbane | |
| Arnica discoidea | CNPS-EB: B | rayless arnica | |
| Calochortus pulchellus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo fairy-lantern | |
| Calycadenia multiglandulosa | CNPS-EB: A2 | sticky calycadenia | |
| Chrysolepis chrysophylla var. minor | CNPS-EB: A2 | golden chinquapin | |
| Cicuta douglasii | CNPS-EB: A2 | water-hemlock | |
| Dirca occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | western leatherwood | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Festuca californica | CNPS-EB: C | California fescue | |
| Helianthella castanea | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Diablo helianthella | |
| Horkelia californica var. frondosa | CNPS-EB: B | leafy horkelia | |
| Juncus phaeocephalus var. phaeocephalus | CNPS-EB: B | brownheaded rush | |
| Lythrum californicum | CNPS-EB: B | California loosestrife | |
| Nicotiana quadrivalvis | CNPS-EB: B | indian tobacco | |
| Pickeringia montana var. montana | CNPS-EB: C | chaparral pea | |
| Prunus subcordata | CNPS-EB: C | Pacific plum, Sierra plum | |
| Rosa spithamea | CNPS-EB: C | coast ground rose, ground rose | |
| Sagittaria latifolia | CNPS-EB: A1 | arrowhead | |
| Sanicula laciniata | CNPS-EB: A2 | coast sanicle | |
| Scutellaria californica | CNPS-EB: B | California skullcap | |
| Triodanis biflora | CNPS-EB: A2 | Venus' looking-glass |