| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Calochortus umbellatus | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3? CNDDB Rank: S3? | Oakland star-tulip | |
| Cirsium brevistylum | CNPS-EB: B | indian thistle | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Zeltnera davyi | (formerly Centaurium d.) | CNPS-EB: B | Davy's centaury, conchalagua |