This name is a synonym of Centaurea diluta Aiton.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B29FBE75-338A-4618-BE5C-069F51E0E88B) with original publication details: 199 1800.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190436-1.
This name was in version 1 of The Plant List, record gcc-3582.