This name is a synonym of Caltha palustris var. membranacea Turcz..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Bull. Soc. Imp. Naturalistes Moscou 15: 62 1842.
This name was in version 1 of The Plant List, record kew-2693911, and has not been changed.