This name is a synonym of Centaurea edith-mariae Radić.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record F0269699-11A7-4A1D-BFDD-055C66943962).
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 edith-mariae in version 1 of The Plant List.