This name is a synonym of Centaurea resupinata subsp. prostrata (Coss.) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record E44C5D19-457F-4CE3-B148-58DC204B296B) with original publication details: 201 1976.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:876822-1.
This name was in version 1 of The Plant List, record gcc-47971.