This name is a synonym of Alsophila capensis subsp. polypodioides (Sw.) D.S. Conant.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50047090) with original publication details: Kongl. Vetensk. Acad. Handl. 1817(1): 78 1817.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:73343-2.
This name was in version 1 of The Plant List, record tro-50047090.