This name is a synonym of Clematis hirsutissima Pursh.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Verh. Bot. Vereins Prov. Brandenburg 26: 180 1885.
This name was in version 1 of The Plant List, record kew-2725944, and has not been changed.