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 240088) with original publication details: Ann. Sci. Nat., Bot. V, 5: 244 1866.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:317914-1.
This name was in version 1 of The Plant List, record kew-240088, and has not been changed.