This name is a synonym of Alsophila subdimorpha (Copel.) Alderw..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50179173) with original publication details: Philipp. J. Sci. 8: 140 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17281770-1.
This name was in version 1 of The Plant List, record tro-50179173, and has not been changed.