This name is a synonym of Fagopyrum leptopodum var. grossii (H.Lév.) Lauener & D.K.Ferguson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50135361) with original publication details: Symb. Sin. 7(1): 188 1929.
This name was in version 1 of The Plant List, record tro-50135361, and has not been changed.