This name is a synonym of Centaurea aucheri subsp. szowitsii (Boiss.) Wagenitz.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 0A612D8E-774D-49A5-AC41-4508A189DCB1) with original publication details: 560 1838.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:176010-1.
This name was in version 1 of The Plant List, record gcc-37262.