This name is a synonym of Osmunda regalis L..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26614384) with original publication details: Suppl. Tent. Pterid. 62 1845.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:17446310-1.
This name was in version 1 of The Plant List, record tro-26614384.