This name is a synonym of Centaurea cariensis subsp. niveotomentosa (Hub.-Mor.) Wagenitz.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record DA73AC3F-59C9-41DB-9107-A382927937B5) with original publication details: 320 1967.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:191118-1.
This name was in version 1 of The Plant List, record gcc-104444, and has not been changed.