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 697C5853-D5BE-4444-A9A6-9256137802A3) with original publication details: 32 1816.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190710-1.
This name was in version 1 of The Plant List, record gcc-96768.