This name is a synonym of Centaurea subtilis Bertol..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 5D3FC88C-F45D-4956-9C18-46769DB8AFC7) with original publication details: 425 1879.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190547-1.
This name was in version 1 of The Plant List, record gcc-37994, and has not been changed.