This name is a synonym of Centaurea phrygia subsp. abnormis (Czerep.) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 97B1EB94-FA57-45AE-9D6B-9EA67C3D6B9E) with original publication details: 394 1961.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:189770-1.
This name was in version 1 of The Plant List, record gcc-102255, and has not been changed.