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 A6E4CE90-D6E5-48F9-A0EE-7B8D2BDC136F) with original publication details: 101 1970.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:191004-1.
This name was in version 1 of The Plant List, record gcc-86715.