This name is a synonym of Ziziphus jujuba f. lageniformis (Nakai) Kitag..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 27501437) with original publication details: Rep. Exped. Manchoukuo Sect. IV 1: 8 1934.
This name was in version 1 of The Plant List, record tro-27501437, and has not been changed.