This name is a synonym of Ziziphus amole (Sessé & Moc.) M.C. Johnst..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50148984) with original publication details: Pl. Nov. Hisp. 38 1887.
This name was in version 1 of The Plant List, record tro-50148984.