This name is a synonym of Hymenophyllum tenellum (Jacq.) Kuhn.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26602980) with original publication details: Coll. Nom. Broth. 3: 287, t. 21, f. 3 1789.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17013270-1.
This name was in version 1 of The Plant List, record tro-26602980, and has not been changed.