This name is a synonym of Pachyrhizus erosus (L.) Urb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13069365) with original publication details: Dict. Sci. Nat. (Levrault) 6: 35 1806.
This name was in version 1 of The Plant List, record tro-13069365.