This name is a synonym of Campanula macrostachya Waldst. & Kit. ex Willd..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 364243) with original publication details: in Fl. Polska 12: 65 1971.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:875485-1.
This name was in version 1 of The Plant List, record kew-364243, and has not been changed.