This name is a synonym of Alsophila imrayana (Hook.) D.S. Conant.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26613762) with original publication details: Sp. Fil. 1: 18, t. 9B 1844.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:73248-2.
This name was in version 1 of The Plant List, record tro-26613762.