This name is a synonym of Diplazium altissimum (Jenman) C. Chr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26625322) with original publication details: J. Bot. 17: 259 1879.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17038920-1.
This name was in version 1 of The Plant List, record tro-26625322, and has not been changed.