This name is a synonym of Centaurea solstitialis subsp. adamii (Willd.) Nyman.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record CCC61D53-CDE6-41D5-808C-27A2F393644A) with original publication details: 15 1829.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190851-1.
This name was in version 1 of The Plant List, record gcc-21448.