This name is a synonym of Centaurea ragusina subsp. lungensis (Ginzb.) Hayek.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B79AEA85-5B46-46C0-9E02-323C23CA6668).
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 lungensis in version 1 of The Plant List.