This name is a synonym of Alsophila minor (D.C. Eaton) R.M. Tryon.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50156600) with original publication details: Mem. Amer. Acad. Arts 8: 216 1860.
This name was in version 1 of The Plant List, record tro-50156600, and has not been changed.