This name is a synonym of Adiantum chilense var. sulphureum (Kaulf.) Kuntze ex Hicken.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50083860) with original publication details: Physis (Buenos Aires) 225 1939.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:5075-2.
This name was in version 1 of The Plant List, record tro-50083860.