| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Centromadia parryi subsp. congdonii | (formerly Hemizonia p. ssp. c. | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G3T2 CNDDB Rank: S2 | Congdon's tarplant |
| Crassula aquatica | CNPS-EB: B | water pygmy-weed | |
| Downingia pulchella | CNPS-EB: B | flat-faced downingia | |
| Eryngium aristulatum var. hooveri | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 | Hoover's button-celery | |
| Lasthenia conjugens | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE | Contra Costa goldfields | |
| Lasthenia glaberrima | CNPS-EB: B | smooth goldfields | |
| Limonium californicum | CNPS-EB: C | western marsh-rosemary, sea-lavender, ma | |
| Limosella acaulis | CNPS-EB: A2 | southern mudwort | |
| Myosurus minimus subsp. minimus | CNPS-EB: C | common mouse-tail | |
| Phragmites australis | CNPS-EB: C | common reed | |
| Pyrrocoma racemosa var. racemosa | CNPS-EB: A1 | racemose pyrrocoma | |
| Rorippa curvisiliqua | CNPS-EB: B | yellow cress | |
| Trifolium barbigerum | CNPS-EB: A2 | bearded clover | |
| Trifolium fucatum | CNPS-EB: C | bull clover | |
| Trifolium hydrophilum | (vars. amplectens and truncatu | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | saline clover |
| Triglochin maritima | CNPS-EB: C | common arrow-grass, seaside arrow-grass | |
| Astragalus tener var. tener | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2T1 CNDDB Rank: S1 | alkali milkvetch | |
| Atriplex serenana var. serenana | CNPS-EB: A1 | bractscale | |
| Bolboschoenus maritimus subsp. paludosus | (formerly Scirpus m.) | CNPS-EB: C | bulrush |
| Lasthenia glabrata subsp. glabrata | CNPS-EB: A2 | yellow-ray goldfields | |
| Layia chrysanthemoides | CNPS-EB: A2 | smooth layia | |
| Leptochloa fusca subsp. uninervia | CNPS-EB: A1 | mexican sprangletop, dense-flowered sprangle-top | |
| Lythrum californicum | CNPS-EB: B | California loosestrife | |
| Microseris douglasii subsp. tenella | (subsp douglasii is more common) | CNPS-EB: A2 | silver puffs |
| Montia fontana | CNPS-EB: C | water chickweed, blinks, water chickweed | |
| Navarretia cotulifolia | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | cotula navarretia | |
| Phacelia ciliata | CNPS-EB: B | Great Valley phacelia, Great Valley phacelia | |
| Phalaris lemmonii | CNPS-EB: A1x | Lemmon's canary-grass | |
| Plantago elongata | CNPS-EB: B | annual coast plantain | |
| Pleuropogon californicus var. californicus | CNPS-EB: B | semaphore grass | |
| Potentilla anserina subsp. pacifica | CNPS-EB: A2 | Pacific silverweed | |
| Sidalcea diploscypha | CNPS-EB: A1 | fringed checkerbloom, fringed sidalcea | |
| Stachys ajugoides | (var. rigida is more common) | CNPS-EB: A2 | bugle hedge nettle |
| Trifolium wormskioldii | CNPS-EB: A1 | cow clover | |
| Triglochin concinna var. concinna | (T. maritima is more common) | CNPS-EB: A1 | seaside arrow-grass, slender arrow-grass |