This name is a synonym of Dioscorea polystachya Turcz..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 240053) with original publication details: Rev. Hort. 1865: 111 1865.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:317878-1.
This name was in version 1 of The Plant List, record kew-240053, and has not been changed.