This name is a synonym of Acanthus montanus (Nees) T.Anderson.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: J. Proc. Linn. Soc., Bot. 7: 37 1864.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:44843-1.
This name was in version 1 of The Plant List, record kew-2615215, and has not been changed.