This name is a synonym of Alsophila portoricensis (Spreng. ex Kuhn) D.S. Conant.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26615135) with original publication details: Linnaea 36: 163 1869.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:73345-2.
This name was in version 1 of The Plant List, record tro-26615135.