This name is a synonym of Ziziphus mistol Griseb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 27500350) with original publication details: Bot. Jahrb. Syst. 54(Beibl. 117): 46 1916.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:271236-2.
This name was in version 1 of The Plant List, record tro-27500350, and has not been changed.