This name is a synonym of Dioscorea sansibarensis Pax.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 241151) with original publication details: Cat. Afr. Pl. 2: 39 1899.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:318794-1.
This name was in version 1 of The Plant List, record kew-241151.