⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2725741, and has not been changed.
This name is a synonym of Clematis villosa subsp. kirkii .
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Bot. Jahrb. Syst. 45: 269 1910.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:709557-1
.