This name is a synonym of Centaurea resupinata subsp. degenii (Sennen) Fern.Casas & Susanna.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 5EA41217-0AFF-4C22-B4B4-AA213B467B8F) with original publication details: 194 1936.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190345-1.
This name was in version 1 of The Plant List, record gcc-107475.