This name is a synonym of Blechnum eburneum Christ.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26610183) with original publication details: Sunyatsenia 5(4): 243 1940.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17420250-1.
This name was in version 1 of The Plant List, record tro-26610183.