This name is a synonym of Campanula fragilis subsp. fragilis .
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 364306) with original publication details: Symb. Bot. 1: 18 1790.
This name was in version 1 of The Plant List, record kew-364306, and has not been changed.