| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Bidens laevis | CNPS-EB: A2 | bur-marigold | |
| Calystegia sepium subsp. limnophila | CNPS-EB: B | hedge bindweed | |
| Carex pellita | (formerly C. lanuginosa) | CNPS-EB: A1 | woolly sedge |
| Eryngium articulatum | CNPS-EB: A1 | beethistle, coyote-thistle | |
| Helenium bigelovii | (H. puberulum is more common) | CNPS-EB: A2 | Bigelow's sneezeweed |
| Hydrocotyle ranunculoides | CNPS-EB: A2 | floating marsh pennywort | |
| Hydrocotyle verticillata | CNPS-EB: B | whorled marsh pennywort | |
| Lathyrus jepsonii var. jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | delta tule pea, Delta tule pea | |
| Persicaria hydropiperoides | (formerly Polygonum h.) | CNPS-EB: A2 | false waterpepper, water-pepper |
| Phragmites australis | CNPS-EB: C | common reed | |
| Pluchea odorata var. odorata | CNPS-EB: B | saltmarsh fleabane | |
| Sium suave | CNPS-EB: A1 | hemlock water-parsnip | |
| Symphyotrichum lentum | (formerly Aster lentus) | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Suisun marsh aster |
| Zeltnera davyi | (formerly Centaurium d.) | CNPS-EB: B | Davy's centaury, conchalagua |
| Apocynum cannabinum | CNPS-EB: B | dogbane, Indian-hemp | |
| Bidens frondosa | CNPS-EB: B | sticktight | |
| Bolboschoenus maritimus subsp. paludosus | (formerly Scirpus m.) | CNPS-EB: C | bulrush |
| Carex aquatilis var. dives | CNPS-EB: A1 | Sitka sedge | |
| Carex nebrascensis | CNPS-EB: B | Nebraska sedge | |
| Cephalanthus occidentalis | CNPS-EB: A2 | button bush | |
| Cicuta maculata var. bolanderi | CNPS-EB: *A1 State CNPS: 2B.1 Global Rank: G5T4T5 CNDDB Rank: S2? | Bolander's water-hemlock, water hemlock | |
| Cuscuta pacifica var. pacifica | (formerly C. salina var. major) | CNPS-EB: C | salt-marsh dodder |
| Cyperus erythrorhizos | CNPS-EB: B | red-rooted cyperus | |
| Cyperus strigosus | CNPS-EB: A1 | false nutsedge, straw-colored cyperus | |
| Deschampsia cespitosa subsp. cespitosa | CNPS-EB: C | tufted hairgrass | |
| Deschampsia cespitosa subsp. holciformis | CNPS-EB: B | tufted hairgrass | |
| Eclipta prostrata | CNPS-EB: A1 | false daisy | |
| Eleocharis parvula | CNPS-EB: *A1 State CNPS: 4.3 Global Rank: G5 CNDDB Rank: S3 | small spikerush | |
| Epilobium ciliatum subsp. watsonii | (ssp. ciliatum is more common) | CNPS-EB: A1 | San Francisco willowherb |
| Erysimum capitatum var. angustatum | (ssp. capitatum is more common | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | Contra Costa wallflower |
| Galium trifidum subsp. columbianum | CNPS-EB: A1 | trifid bedstraw | |
| Helianthus californicus | CNPS-EB: C | California sunflower | |
| Hoita macrostachya | CNPS-EB: B | California hemp | |
| Isolepis cernua | (formerly Scirpus cernuus) | CNPS-EB: C | low club-rush |
| Juncus dubius | CNPS-EB: A1x | mariposa rush, Mariposa rush | |
| Juncus lescurii | CNPS-EB: A1 | San Francisco rush, salt rush | |
| Juncus oxymeris | CNPS-EB: A1 | pointed rush | |
| Lilaeopsis masonii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G2 CNDDB Rank: S2 CESA Status: CR | Mason's lilaeopsis | |
| Lycopus americanus | CNPS-EB: A2 | cutleaf bugleweed | |
| Lycopus asper | CNPS-EB: A1 | bugleweed | |
| Lysimachia maritima | CNPS-EB: A1 | sea-milkwort | |
| Lythrum californicum | CNPS-EB: B | California loosestrife | |
| Mentha canadensis | CNPS-EB: B | American cornmint, Japanese peppermint | |
| Oenothera deltoides subsp. howellii | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G5T1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | Antioch Dunes evening-primrose | |
| Oenothera elata subsp. hookeri | CNPS-EB: C | evening-primrose | |
| Persicaria punctata | (formerly Polygonum punctatum) | CNPS-EB: C | water smartweed |
| Phalaris arundinacea | CNPS-EB: A1 | reed canary grass | |
| Phyla lanceolata | CNPS-EB: A1x | fog-fruit | |
| Plantago subnuda | CNPS-EB: A2 | Mexican plantain | |
| Potentilla anserina subsp. pacifica | CNPS-EB: A2 | Pacific silverweed | |
| Rorippa palustris subsp. palustris | CNPS-EB: B | marsh yellow-cress | |
| Rumex occidentalis | CNPS-EB: A2 | western dock | |
| Salix gooddingii | CNPS-EB: B | Goodding's black willow | |
| Samolus parviflorus | CNPS-EB: A1 | seaside brookweed, water-pimpernel | |
| Senecio hydrophilus | CNPS-EB: A2 | water ragwort, alkali-marsh ragwort, alkali-marsh butterweed | |
| Stachys albens | CNPS-EB: B | white hedge nettle | |
| Stuckenia filiformis subsp. alpina | (formerly Potamogeton f.) | CNPS-EB: *A1x State CNPS: 2B.2 Global Rank: G5T5 CNDDB Rank: S2S3 | slender-leaved potamogeton |
| Symphyotrichum subulatum var. parviflorum | (formerly Aster subulatus var. | CNPS-EB: B | slim aster |
| Trifolium wormskioldii | CNPS-EB: A1 | cow clover | |
| Triglochin maritima | CNPS-EB: C | common arrow-grass, seaside arrow-grass | |
| Triglochin striata | (T. maritima is more common) | CNPS-EB: B | three-ribbed arrow-grass |