Walnut Creek
| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Lasthenia glabrata subsp. glabrata | CNPS-EB: A2 | yellow-ray goldfields | |
| Wolffia brasiliensis | CNPS-EB: *A1 State CNPS: 2B.3 | Brazilian watermeal | |
| Amsinckia tessellata var. tessellata | CNPS-EB: A1 | desert fiddleneck, devil's lettuce | |
| Blepharizonia plumosa | CNPS-EB: *A2 State CNPS: 1B.1 | big tarplant | |
| Calochortus umbellatus | CNPS-EB: *A2 State CNPS: 4.2 | Oakland star-tulip | |
| Carex multicostata | CNPS-EB: A1 | many-ribbed sedge | |
| Cornus glabrata | CNPS-EB: A2 | brown dogwood | |
| Elatine brachysperma | CNPS-EB: A1 | waterwort | |
| Lasthenia conjugens | CNPS-EB: *A2 State CNPS: 1B.1 FESA Status: FE | Contra Costa goldfields | |
| Lathyrus jepsonii var. jepsonii | CNPS-EB: *A2 State CNPS: 1B.2 | delta tule pea, Delta tule pea | |
| Limnanthes douglasii subsp. douglasii | CNPS-EB: A1 | meadowfoam | |
| Limnanthes douglasii subsp. nivea | CNPS-EB: A1x | meadowfoam | |
| Lupinus luteolus | CNPS-EB: A1x | butter lupine | |
| Micropus amphibolus | (historical - 1955) | CNPS-EB: *A1x State CNPS: 3.2 | Mount Diablo cottonseed, Mt. Diablo cottonweed |
| Navarretia viscidula | CNPS-EB: A2 | sticky navarretia | |
| Panicum capillare | CNPS-EB: A2 | witch grass | |
| Pogogyne douglasii | (historical-1940) | CNPS-EB: A1x | Douglas' beardstyle, Douglas pogogyne |
| Sidalcea diploscypha | CNPS-EB: A2 | fringed checkerbloom, fringed sidalcea | |
| Spergularia macrotheca var. leucantha | CNPS-EB: A2 | large-flowered sand spurry | |
| Sporobolus airoides | CNPS-EB: A1 | alkali sacaton | |
| Lycopus americanus | CNPS-EB: B | cutleaf bugleweed | |
| Alopecurus saccatus | CNPS-EB: B | Howell's meadow foxtail | |
| Anemopsis californica | CNPS-EB: B-PV | yerba mansa, lizard tail | |
| Lasthenia glaberrima | CNPS-EB: B | smooth goldfields | |
| Lathyrus jepsonii var. californicus | CNPS-EB: B | buff pea | |
| Plagiobothrys trachycarpus | CNPS-EB: C | rough-nutlet popcornflower, rough-fruited allocarya | |
| Pleuropogon californicus var. californicus | CNPS-EB: B-PV | semaphore grass | |
| Trifolium fucatum | CNPS-EB: B-PV | bull clover | |
| Trifolium obtusiflorum | CNPS-EB: B-PV | clammy clover, creek clover |
