This name is a synonym of Dioscorea oppositifolia L..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 240597) with original publication details: Fl. Jap. 151 1784.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:318346-1.
This name was in version 1 of The Plant List, record kew-240597, and has not been changed.