This name is a synonym of Adiantum polyphyllum Willd..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26604490) with original publication details: Linnaea 17: 569 1843.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17009290-1.
This name was in version 1 of The Plant List, record tro-26604490, and has not been changed.