This name is a synonym of Alsophila sternbergii (Sternb.) D.S. Conant.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26621104) with original publication details: Fl. von Vorwelt 1: 47 1820.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:73393-2.
This name was in version 1 of The Plant List, record tro-26621104, and has not been changed.