This name is a synonym of Clematis coactilis (Fernald) Keener.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Rhodora 45: 407 1943.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:60273-2.
This name was in version 1 of The Plant List, record kew-2725562, and has not been changed.