This name is a synonym of Centaurea mutabilis var. nouletiana Rouy & Foucaud.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 119C435A-6929-4FB0-A31D-89140E4CEC80) with original publication details: 34 1950.
This name was in version 1 of The Plant List, record gcc-92660, and has not been changed.