This name is a synonym of Ophioglossum vulgatum var. alaskanum (E. Britton) C. Chr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26603637) with original publication details: Bull. Torrey Bot. Club 24(12): 556–557, pl. 319, f. 5 1897.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:174577-2.
This name was in version 1 of The Plant List, record tro-26603637, and has not been changed.