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 364365) with original publication details: Magyar Bot. Lapok 29: 268 1930.
This name was in version 1 of The Plant List, record kew-364365, and has not been changed.