This name is a synonym of Centaurea seridis subsp. maritima (Dufour) Dostál.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record AADEB119-56BB-4ECA-B86C-27260A8DD637) with original publication details: Ann. Sci. Nat. (Paris) 23 165 1831.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190972-1.
This name was in version 1 of The Plant List, record gcc-21196, and has not been changed.