This name is a synonym of Centaurea thuillieri (Dostál) J.Duvign. & Lambinon.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B0ACB39E-7620-48FE-B932-9C546A0E3FAB) with original publication details: 629 1980.
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 nigra in version 1 of The Plant List.