This name is a synonym of Desmodium laxiflorum subsp. parvifolium H. Ohashi & T.T. Chen.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13067517) with original publication details: J. Jap. Bot. 26: 235 1951.
This name was in version 1 of The Plant List, record tro-13067517.