| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Adiantum aleuticum | (A. jordanii is more common) | CNPS-EB: A1 | five-finger fern |
| Alnus rubra | (A. rhombifolia is more common | CNPS-EB: A2 | red alder |
| Alopecurus saccatus | CNPS-EB: B | Howell's meadow foxtail | |
| Amsinckia lycopsoides | CNPS-EB: C | bugloss-flowered fiddleneck, bugloss fiddleneck | |
| Apocynum cannabinum | CNPS-EB: B | dogbane, Indian-hemp | |
| Aralia californica | CNPS-EB: C | elk clover | |
| Arctostaphylos crustacea subsp. rosei | CNPS-EB: A1 | Rose's manzanita | |
| Carex gracilior | CNPS-EB: A1 | slender sedge | |
| Carex obnupta | CNPS-EB: B | slough sedge | |
| Castilleja rubicundula subsp. lithospermoides | CNPS-EB: B | cream sacs | |
| Castilleja wightii | CNPS-EB: B | Wight's indian paintbrush | |
| Ceanothus thyrsiflorus var. thyrsiflorus | CNPS-EB: B | blue blossom, California lilac | |
| Cirsium brevistylum | CNPS-EB: B | indian thistle | |
| Cirsium quercetorum | CNPS-EB: A2 | brownie thistle | |
| Cirsium remotifolium var. odontolepis | CNPS-EB: A1 | remote-leaved thistle | |
| Cuscuta pacifica var. pacifica | (formerly C. salina var. major) | CNPS-EB: C | salt-marsh dodder |
| Danthonia californica | CNPS-EB: B | California oat grass | |
| Deinandra corymbosa | (formerly Hemizonia corymbosa) | CNPS-EB: A2 | coast tarweed |
| Epilobium ciliatum subsp. watsonii | (ssp. ciliatum is more common) | CNPS-EB: A1 | San Francisco willowherb |
| Eragrostis mexicana subsp. virescens | CNPS-EB: A1x | Orcutt's eragrostis | |
| Eriogonum angulosum | CNPS-EB: B | angle-stem wild buckwheat, angle-stemmed eriogonum | |
| Eryngium armatum | CNPS-EB: A1 | coastal button-celery, coast coyote-thistle | |
| Erythranthe laciniata | (formerly Mimulus laciniatus) | CNPS-EB: *A1x State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | CUT-LEAVED MONKEYFLOWER |
| Erythranthe microphylla | CNPS-EB: A1x | ||
| Garrya elliptica | CNPS-EB: B | silk tassel bush | |
| Hemizonia congesta subsp. lutescens | CNPS-EB: B | hayfield tarweed | |
| Holocarpha macradenia | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FT CESA Status: CE | Santa Cruz tarplant | |
| Horkelia californica var. californica | CNPS-EB: A1 | California horkelia | |
| Lupinus affinis | CNPS-EB: A1 | lupine | |
| Lupinus luteolus | CNPS-EB: A1x | butter lupine | |
| Mentha canadensis | CNPS-EB: B | American cornmint, Japanese peppermint | |
| Micropus californicus var. subvestitus | (var. californicus is more common) | CNPS-EB: A2 | slender cottonweed |
| Microseris bigelovii | (historical-1891) | CNPS-EB: A1x | coast microseris |
| Microseris sylvatica | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | sylvan microseris | |
| Petunia parviflora | CNPS-EB: A1 | wild petunia | |
| Phacelia divaricata | CNPS-EB: B | divaricate phacelia | |
| Phacelia tanacetifolia | CNPS-EB: B | tansy phacelia | |
| Phalaris lemmonii | CNPS-EB: A1x | Lemmon's canary-grass | |
| Platanthera dilatata var. leucostachys | (formerly P. l.) (historical-1 | CNPS-EB: A1x | white-flowered bog-orchid |
| Poa howellii | CNPS-EB: A2 | Howell's bluegrass | |
| Pogogyne douglasii | (historical-1940) | CNPS-EB: A1x | Douglas' beardstyle, Douglas pogogyne |
| Ranunculus orthorhynchus var. bloomeri | CNPS-EB: A1x | Bloomer's buttercup | |
| Ranunculus orthorhynchus var. orthorhynchus | (historical-1895) | CNPS-EB: A1x | straight-beaked buttercup |
| Rumex transitorius | CNPS-EB: B | willow dock | |
| Scirpus microcarpus | CNPS-EB: C | small-fruited bulrush | |
| Scutellaria californica | CNPS-EB: B | California skullcap | |
| Stachys ajugoides | (var. rigida is more common) | CNPS-EB: A2 | bugle hedge nettle |
| Stephanomeria elata | CNPS-EB: A2 | stephanomeria | |
| Trifolium barbigerum | CNPS-EB: A2 | bearded clover | |
| Trifolium dichotomum | CNPS-EB: C | branched indian clover | |
| Trifolium fucatum | CNPS-EB: C | bull clover | |
| Trifolium macraei | CNPS-EB: A1 | Macrae's clover, double-headed clover | |
| Zeltnera davyi | (formerly Centaurium d.) | CNPS-EB: B | Davy's centaury, conchalagua |