This name is a synonym of Rhamnus tangutica J.J. Vassil..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 27501374) with original publication details: Fl. Tangut. 203 1889.
This name was in version 1 of The Plant List, record tro-27501374, and has not been changed.