This name is a synonym of Centaurea thessala subsp. drakiensis (Freyn & Sint.) T.Georgiadis.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 95067557-77F7-4FAF-92D6-63FEA7538CE2) with original publication details: 198 1976.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:876800-1.
This name was in version 1 of The Plant List, record gcc-53164, and has not been changed.