This name is a synonym of Centaurea monktonii C.E.Britton.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 97C26DF7-CE4D-4A90-82A6-8C17AB22FC3A) with original publication details: 91 1813.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:51290-2.
This name was in version 1 of The Plant List, record gcc-58143.