This name is a synonym of Cystopteris fragilis (L.) Bernh..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26604225) with original publication details: Gard. Farmers' J. 2: 308 1848.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17387150-1.
This name was in version 1 of The Plant List, record tro-26604225.