This name is a synonym of Centaurea affinis subsp. denudata (Halácsy) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 8367AD63-6932-435C-A797-B5B0E606552A) with original publication details: 197 1976.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:876928-1.
This name was in version 1 of The Plant List, record gcc-63286, and has not been changed.