This name is a synonym of Campanula cochleariifolia Lam..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 364318) with original publication details: Magyar Bot. Lapok 29: 260 1930.
This name was in version 1 of The Plant List, record kew-364318, and has not been changed.