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 E4CBEA25-1EDF-4A62-9225-920A15C9A6FD) with original publication details: 389 1953.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:189039-1.
This name was in version 1 of The Plant List, record gcc-96635.