This name is a synonym of Centaurea raphanina subsp. mixta (DC.) Runemark.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 8F1274BB-7B63-438E-BDC3-F6285F094258) with original publication details: 13 1934.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190461-1.
This name was in version 1 of The Plant List, record gcc-140908.