| Clematis arizonica | Clematis hirsutissima Pursh |
| Clematis bakeri | Clematis hirsutissima Pursh |
| Clematis crassisepala | Clematis ochotensis (Pall.) Poir. |
| Clematis douglasii | Clematis hirsutissima Pursh |
| Clematis palmeri | Clematis bigelovii Torr. |
| Clematis pinetorum | Clematis columbiana (Nutt.) Torr. & A.Gray |
| Clematis platysepala | Clematis ochotensis (Pall.) Poir. |
| Clematis pseudoalpina | Clematis columbiana (Nutt.) Torr. & A.Gray |
| Clematis pseudoatragene | Clematis columbiana (Nutt.) Torr. & A.Gray |
| Clematis turkestanica | Clematis sibirica (L.) Mill. |
| Clematis wenderothii | Clematis alpina (L.) Mill. |