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 70C926C7-2551-4C5E-BB76-C7B72445FC00) with original publication details: 516 1875.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:188426-1.
This name was in version 1 of The Plant List, record gcc-120515.