This name is a synonym of Centaurea drabifolia Sm..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record E2822B7C-67E2-45CD-A84A-0F731E553518).
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Centaurea drabifolia in version 1 of The Plant List.