This name is a synonym of Ophioglossum lusitanicum subsp. coriaceum (A. Cunn.) R.T. Clausen.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26609699) with original publication details: Nov. Acad. Erf. 2: 18, t. 1, f. 1 .
This name was in version 1 of The Plant List, record tro-26609699, and has not been changed.