This name is a synonym of Centaurea rouyi var. segariensis ("Figuerola, Peris & Stübing") Rivas Mart. & M.J.Costa.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record D39DC550-1AA6-420E-B705-41B4630F9EEF) with original publication details: 934 1995.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:991139-1.
This name was in version 1 of The Plant List, record gcc-35445, and has not been changed.