This name is a synonym of Desmodium elegans f. albiflorum (P. Li) H. Ohashi.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50171877) with original publication details: J. Jap. Bot. 70(2): 113 1995.
This name record (from Tropicos) 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 Desmodium albiflorum in version 1 of The Plant List.