This name is a synonym of Carduus nutans L..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record DCFCC910-01AD-4624-A157-D398A93BDD5E) with original publication details: 390 1953.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:188551-1.
This name was in version 1 of The Plant List, record gcc-125686.