This name is a synonym of Zanthoxylum bungeanum var. zimmermannii (Rehder & E.H. Wilson) C.C. Huang.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50049607) with original publication details: Pl. Wilson. 2(1): 122 1914.
This name was in version 1 of The Plant List, record tro-50049607, and has not been changed.