Marsh Creek State Park - formerly Cowell Ranch
| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Downingia insignis | CNPS-EB: A1 | cupped downingia | |
| Eryngium aristulatum var. aristulatum | CNPS-EB: A2 | ||
| Hesperevax caulescens | (H. sparsiflora is more common | CNPS-EB: *A2 State CNPS: 4.2 | hogwallow starfish |
| Myosurus sessilis | CNPS-EB: A2 | sessile mouse-tail | |
| Navarretia cotulifolia | CNPS-EB: *A2 State CNPS: 4.2 | cotula navarretia | |
| Plagiobothrys humistratus | CNPS-EB: A2 | low popcornflower, dwarf allocarya | |
| Pogogyne zizyphoroides | CNPS-EB: A2 | Sacramento beardstyle | |
| Psilocarphus oregonus | CNPS-EB: A2 | Oregon woollyheads, Oregon woolly-marbles | |
| Atriplex coronata var. coronata | CNPS-EB: *A2 State CNPS: 4.2 | crownscale | |
| Navarretia nigelliformis subsp. nigelliformis | CNPS-EB: *A2? State CNPS: 4.2 | adobe navarretia | |
| Agoseris heterophylla var. heterophylla | CNPS-EB: C | ||
| Alopecurus saccatus | CNPS-EB: B | Howell's meadow foxtail | |
| Atriplex argentea var. expansa | CNPS-EB: B | silverscale | |
| Atriplex fruticulosa | CNPS-EB: B | ballscale, little oak orach, ball saltbush | |
| Blennosperma nanum var. nanum | CNPS-EB: C | blennosperma | |
| Brodiaea terrestris subsp. terrestris | CNPS-EB: B-PV | dwarf brodiaea | |
| California macrophylla | (formerly Erodium macrophyllum | CNPS-EB: B-PV | round-leaved filaree |
| Euphorbia ocellata subsp. ocellata | CNPS-EB: B | valley spurge | |
| Holocarpha obconica | CNPS-EB: B | San Joaquin tarplant | |
| Lepidium acutidens | CNPS-EB: C | sharp-toothed pepper-grass | |
| Lepidium latipes | CNPS-EB: B-PV | dwarf peppergrass | |
| Lupinus pachylobus | CNPS-EB: B | big pod lupine | |
| Myosurus minimus subsp. minimus | CNPS-EB: B-PV | common mouse-tail | |
| Plagiobothrys acanthocarpus | CNPS-EB: B-PV | adobe popcornflower, adobe allocarya | |
| Plagiobothrys stipitatus var. stipitatus | (var. micranthus is more commo | CNPS-EB: C | showy great valley popcornflower, stipitate allocarya |
| Plantago elongata | CNPS-EB: B-PV | annual coast plantain | |
| Quercus lobata | CNPS-EB: C | valley oak, roble | |
| Ranunculus canus var. canus | CNPS-EB: C | Sacramento Valley buttercup |
