| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Gentianaceae | Bartonia | Bartonia |  | ||
| Gentianaceae | Blackstonia |  | |||
| Gentianaceae | Centaurium | Centaury |  | ||
| Gentianaceae | Eustoma | Prairie-gentian |  | ||
| Gentianaceae | Frasera | Columbo |  | ||
| Gentianaceae | Gentiana | Gentian |  | ||
| Gentianaceae | Gentianella | Gentianella, Agueweed |  | ||
| Gentianaceae | Gentianopsis | Fringed-gentian |  | ||
| Gentianaceae | Leiphaimos | Ghost-plant |  | ||
| Gentianaceae | Obolaria | Pennywort |  | ||
| Gentianaceae | Sabatia | Sabatia, Rose-gentian, Rose-pink, Marsh-pink, Sea-pink |  | ||
| Gentianaceae | Schenkia | Centaury |  | ||
| Gentianaceae | Zeltnera |  |