This name is a synonym of Centaurea princeps Boiss. & Heldr..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 3D3E25FF-1750-4C89-8A97-70204028667E) with original publication details: 31 1907.
This name was in version 1 of The Plant List, record gcc-54707, and has not been changed.