This name is a synonym of Dioscorea delavayi Franch..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 453418) with original publication details: J. Proc. Asiat. Soc. Bengal 10: 21 1914.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Dioscorea kamoonensis in version 1 of The Plant List.