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 C81B0F28-3A69-4538-B6CE-BA41E0AE117E) with original publication details: 681 1875.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:191028-1.
This name was in version 1 of The Plant List, record gcc-114610, and has not been changed.