This name is a synonym of Centaurea diffusa Lam..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 35B9A75A-FC38-4BBD-A8F2-4D92F75883E1) with original publication details: 586 1838.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:189872-1.
This name was in version 1 of The Plant List, record gcc-41896.