This name is a synonym of Ziziphus spina-christi var. aucheri (Boiss.) Qaiser & Nazim..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50325953) with original publication details: Diagn. Pl. Orient., ser. 1 1(2): 5 1843.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:719261-1.
This name was in version 1 of The Plant List, record tro-50325953, and has not been changed.