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 26607669) with original publication details: Mém. Soc. Linn. Paris 6: 284 1827.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17058980-1.
This name was in version 1 of The Plant List, record tro-26607669.