This name is a synonym of Adiantum humile Kunze.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26606784) with original publication details: Amer. J. Bot. 1(2): 166 1932.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:4963-2.
This name was in version 1 of The Plant List, record tro-26606784, and has not been changed.