This name is a synonym of Campanula transsilvanica Schur ex André.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 364246) with original publication details: in Fl. Polska 12: 67 1971.
This name was in version 1 of The Plant List, record kew-364246, and has not been changed.