This name is a synonym of Pteridium aquilinum var. latiusculum (Desv.) Underw. ex A. Heller.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26619449) with original publication details: Fl. Indo-Chine 7(2): 138 1939.
This name was in version 1 of The Plant List, record tro-26619449.