This name is a synonym of Centaurea resupinata subsp. lagascae (Nyman) Fern.Casas & Susanna.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record D3981704-B74E-4C13-BC42-3A66D2440886) 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:954376-1.
This name was in version 1 of The Plant List, record gcc-31503.