This name is a synonym of Centaurea resupinata subsp. dufourii (Dostál) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A9BFED4A-BD0E-48AA-A22A-0603BDA96656) with original publication details: 154 1982.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:910190-1.
This name was in version 1 of The Plant List, record gcc-3247.