This name is a synonym of Centaurea thessala subsp. drakiensis (Freyn & Sint.) T.Georgiadis.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record D03EFC14-1E00-46EA-9CF1-3E05708C8998) with original publication details: 783 1897.
This name was in version 1 of The Plant List, record gcc-33449, and has not been changed.