This name is a synonym of Cyanus orbelicus (Velen.) Soják.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9FDB623E-16FD-452B-91B2-73EB7D9D47DA).
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 orbelica in version 1 of The Plant List.