| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Eriogonum luteolum var. caninum | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | Tiburon buckwheat | |
| Agoseris heterophylla var. heterophylla | CNPS-EB: C | ||
| Allium falcifolium | CNPS-EB: A2 | sickle-leaved onion | |
| Apiastrum angustifolium | CNPS-EB: C | wild celery | |
| Apocynum androsaemifolium | CNPS-EB: A2 | bitter dogbane, dogbane | |
| Arctostaphylos glandulosa subsp. glandulosa | CNPS-EB: B | Eastwood manzanita | |
| Arnica discoidea | CNPS-EB: B | rayless arnica | |
| Balsamorhiza macrolepis | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | big-scale balsamroot | |
| Calamagrostis nutkaensis | (historical-18??) | CNPS-EB: A1x | Pacific reed grass |
| 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 | |
| Calycadenia multiglandulosa | CNPS-EB: A2 | sticky calycadenia | |
| Carex globosa | CNPS-EB: B | round-fruited sedge | |
| Castilleja ambigua subsp. ambigua | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5T4 CNDDB Rank: S3S4 | Johnny-nip | |
| Castilleja rubicundula subsp. lithospermoides | CNPS-EB: B | cream sacs | |
| Castilleja subinclusa subsp. franciscana | CNPS-EB: A1 | Franciscan indian paintbrush | |
| Chrysolepis chrysophylla var. minor | CNPS-EB: A2 | golden chinquapin | |
| Cirsium brevistylum | CNPS-EB: B | indian thistle | |
| Clintonia andrewsiana | CNPS-EB: A1 | red clintonia | |
| Dendromecon rigida | CNPS-EB: A2 | bush poppy | |
| Dichelostemma volubile | 2 questionable ID sites. Needs field research | CNPS-EB: A1? | twining brodiaea, snake lily |
| Dirca occidentalis | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | western leatherwood | |
| Hosackia stipularis var. stipularis | CNPS-EB: A1 | stipulate lotus | |
| Lathyrus jepsonii var. californicus | CNPS-EB: B | buff pea | |
| Layia gaillardioides | CNPS-EB: A2 | woodland layia | |
| Layia glandulosa | (historical-1983 but not seen | CNPS-EB: A1x | white layia |
| Lepidium oblongum | (historical-1937) | CNPS-EB: A1x | wayside pepper-grass |
| Monolopia gracilens | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G3 CNDDB Rank: S3 | woodland woollythreads, woodland monolopia | |
| Perideridia oregana | CNPS-EB: A2 | yampah | |
| Phacelia divaricata | CNPS-EB: B | divaricate phacelia | |
| Piperia elongata | CNPS-EB: C | chaparral orchid, wood rein-orchid, elongate piperia | |
| Polystichum californicum | CNPS-EB: A1 | California sword fern | |
| Polystichum imbricans subsp. imbricans | CNPS-EB: A1x | rock sword fern | |
| Prosartes smithii | (formerly Disporum s.)(P. | CNPS-EB: A1x | large-flowered fairy bell |
| Prunus ilicifolia subsp. ilicifolia | CNPS-EB: B | islay, holly-leafed cherry | |
| Rosa spithamea | CNPS-EB: C | coast ground rose, ground rose | |
| Salix scouleriana | CNPS-EB: A2 | Scouler's willow | |
| Sanicula laciniata | CNPS-EB: A2 | coast sanicle | |
| Scoliopus bigelovii | (historical-1900) | CNPS-EB: A1x | fetid adder's tongue, slink pod |
| Scutellaria californica | CNPS-EB: B | California skullcap | |
| Stephanomeria elata | CNPS-EB: A1 | stephanomeria | |
| Tetrapteron graciliflorum | CNPS-EB: C | hill sun cup | |
| Thermopsis californica var. californica | (historical-1929) | CNPS-EB: A1x | santa ynez false-lupine, false-lupine |
| Thysanocarpus radians | CNPS-EB: A1 | ribbed fringe pod | |
| Trifolium barbigerum | CNPS-EB: A2 | bearded clover | |
| Trifolium dichotomum | CNPS-EB: C | branched indian clover | |
| Trifolium fucatum | CNPS-EB: B | bull clover | |
| Vaccinium ovatum | CNPS-EB: C | California huckleberry | |
| Vancouveria planipetala | (historical-1898) | CNPS-EB: A1x | redwood ivy, inside-out flower |