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 200194CC-6905-4AC2-BDF0-12E6A8811B93) with original publication details: 391 1953.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:189066-1.
This name was in version 1 of The Plant List, record gcc-10100.