This name is a synonym of Centaurea thracica (Janka) Janka ex Gugler.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record C2230A97-87C7-4850-AFF4-D84578859055) with original publication details: 429 1879.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190521-1.
This name was in version 1 of The Plant List, record gcc-127690, and has not been changed.