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 C6008AA3-9AE8-4F50-B45E-AE4B2F1FDB59) with original publication details: 92 1988.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:954375-1.
This name was in version 1 of The Plant List, record gcc-62369.