This name is a synonym of Centaurea nervosa subsp. davidovii (Urum.) Hayek.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 6E7DE641-AE32-45CB-9AA6-F5601E4A3113) with original publication details: 58 1907.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190327-1.
This name was in version 1 of The Plant List, record gcc-140579.