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 56AA1F0B-54D5-4C8D-9A6E-FBA9AC9401F1) with original publication details: Schübl. & G. Martens. 1834. 547 1834.
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 jacea in version 1 of The Plant List.