This name is a synonym of Caltha palustris var. sibirica Regel.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Kongl. Svenska Vetensk. Acad. Handl. IV, 13: 337 1971.
This name was in version 1 of The Plant List, record kew-2693921, and has not been changed.