This name is a synonym of Ophioglossum pusillum Raf..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50089703) with original publication details: Rhodora 15(173): 87 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:174628-2.
This name was in version 1 of The Plant List, record tro-50089703, and has not been changed.