This name is a synonym of Centaurea cuneifolia Sibth. & Sm..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 1693116E-5B97-42A9-A4FA-7D4AA02465A5).
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 cuneifolia in version 1 of The Plant List.