This name is a synonym of Ziziphus mucronata Willd..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 27500425) with original publication details: Notul. Syst. (Paris) 11: 17–18 1943.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:719347-1.
This name was in version 1 of The Plant List, record tro-27500425.