This name is a synonym of Dioscorea elephantipes (L'Hér.) Engl..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 267980) with original publication details: Natl. Cact. Succ. J. 28: 6 1973.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:879862-1.
This name was in version 1 of The Plant List, record kew-267980, and has not been changed.