This name is a synonym of Therorhodion camtschaticum var. pumilum (E.A. Busch) T. Yamaz..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50334029).
This name was in version 1 of The Plant List, record tro-50334029, and has not been changed.