This name is a synonym of Carduus cephalanthus Viv..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9EEAF215-8A66-4615-9329-9774C58A74D4) with original publication details: 283 1840.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:188416-1.
This name was in version 1 of The Plant List, record gcc-99035, and has not been changed.