This name is a synonym of Arisaema macrospathum Benth..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 8166) with original publication details: Pflanzenr. IV, 23F: 190 1920.
This name was in version 1 of The Plant List, record kew-8166, and has not been changed.