This name is a synonym of Centaurea paniculata var. boetica Pau.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 1F1BD67B-C81C-4680-8C6E-774D9768F6A8) with original publication details: 271 1984.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:907642-1.
This name was in version 1 of The Plant List, record gcc-84802, and has not been changed.