| Campanula exigua | chaparral harebell | *A2 |
| Campanula griffinii | Griffin's campanula | A1 |
| Campanula sharsmithiae | SHARSMITH'S HAREBELL | *A1x |
| Downingia bella | Hoover's downingia | A1x |
| Downingia cuspidata | cuspidate downingia | A1 |
| Downingia insignis | cupped downingia | A1 |
| Downingia ornatissima var. mirabilis | Solano downingia | A1x |
| Downingia pulchella | flat-faced downingia | B |
| Githopsis diffusa subsp. robusta | southern bluecup | A2 |
| Githopsis specularioides | common bluecup | B |
| Heterocodon rariflorum | heterocodon | A1 |
| Legenere limosa | legenere | *A1 |
| Nemacladus capillaris | | A1 |
| Triodanis biflora | Venus' looking-glass | A2 |