This name is a synonym of Cirsium pulcherrimum (Rydb.) K.Schum..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 7A0F1CD6-14CD-44DA-AD18-19746E261EC3) with original publication details: Bull. Torrey Bot. Club 28 510 1901.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:45589-2.
This name was in version 1 of The Plant List, record gcc-13683.