This name is a synonym of Centaurea subjacea (Beck) Hayek.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 0E3E095E-13CB-486C-BF54-BE7C656B07D5) with original publication details: 1827.
This name was in version 1 of The Plant List, record gcc-116473, and has not been changed.