This name is a synonym of Dioscorea trifoliata Kunth.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 240164) with original publication details: Enum. Pl. 5: 417 1850.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:317989-1.
This name was in version 1 of The Plant List, record kew-240164, and has not been changed.