This name is a synonym of Centaurea protomargaritacea Klokov.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 74221CD4-82A1-475E-93A9-146166DBEB7E) with original publication details: 204 1976.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:876892-1.
This name was in version 1 of The Plant List, record gcc-10892, and has not been changed.