| Viorna albicoma (Wherry) Moldenke | Clematis albicoma Wherry |
| Viorna bigelovii (Torr.) A.Heller | Clematis bigelovii Torr. |
| Viorna fremontii (S.Watson) A.Heller | Clematis fremontii S.Watson |
| Viorna hirsutissima (Pursh) A.Heller | Clematis hirsutissima Pursh |
| Viorna palmeri (Rose) Wooton & Standl. | Clematis bigelovii Torr. |