⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2726369, with some changes.
This name is a synonym of Clematis williamsii .
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Verh. Bot. Vereins Prov. Brandenburg 26: 141 1885.