This name is a synonym of Blechnum gracile Kaulf..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50055661) with original publication details: Crypt. Vasc. Brésil 1: 25, t. 8, f. 1 1869.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17058680-1.
This name was in version 1 of The Plant List, record tro-50055661.