This name is a synonym of Dioscorea megacarpa Gleason.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 241081) with original publication details: Bull. Misc. Inform. Kew 1916: 194 1916.
This name was in version 1 of The Plant List, record kew-241081, and has not been changed.