| Acanthomintha lanceolata | Santa Clara thornmint | 4.2 ⓘ |
| Androsace elongata subsp. acuta | | 4.2 ⓘ |
| Atriplex coronata var. coronata | crownscale | 4.2 ⓘ |
| Calandrinia breweri | | 4.2 ⓘ |
| Calochortus umbellatus | Oakland star-tulip | 4.2 ⓘ |
| Castilleja ambigua subsp. ambigua | johnny-nip | 4.2 ⓘ |
| Clarkia breweri | Brewer's clarkia | 4.2 ⓘ |
| Clarkia concinna subsp. automixa | Santa Clara red ribbons | 4.3 ⓘ |
| Collomia diversifolia | serpentine collomia | 4.3 ⓘ |
| Convolvulus simulans | | 4.2 ⓘ |
| Eleocharis parvula | small spikerush | 4.3 ⓘ |
| Eriogonum umbellatum var. bahiiforme | sulfur flower | 4.2 ⓘ |
| Eriophyllum jepsonii | Jepson's woolly-sunflower | 4.3 ⓘ |
| Erythranthe inconspicua | small-flowered monkeyflower | 4.3 ⓘ |
| Fritillaria agrestis | stinkbells | 4.2 ⓘ |
| Galium andrewsii subsp. gatense | needle bedstraw | 4.2 ⓘ |
| Hesperevax caulescens | hogwallow starfish | 4.2 ⓘ |
| Iris longipetala | central coast iris | 4.2 ⓘ |
| Lasthenia ferrisiae | | 4.2 ⓘ |
| Leptosiphon ambiguus | serpentine linanthus | 4.2 ⓘ |
| Leptosiphon aureus | | 4.2 ⓘ |
| Leptosiphon grandiflorus | large-flowered linanthus | 4.2 ⓘ |
| Lessingia tenuis | spring lessingia | 4.3 ⓘ |
| Microseris sylvatica | | 4.2 ⓘ |
| Navarretia cotulifolia | cotula navarretia | 4.2 ⓘ |
| Navarretia heterandra | Tehama navarretia | 4.3 ⓘ |
| Platanthera michaelii | Michael's rein-orchid | 4.2 ⓘ |
| Ranunculus lobbii | Lobb's buttercup | 4.2 ⓘ |