Ziziphus quadrilocularis is a flowering plant endemic to Australia.

[1] It is a deciduous, spiny shrub or tree, growing to 2–12 m in height.

It bears green and yellow flowers from November to March.

After being scorched by wildfire it can resprout from a lignotuber and root suckers.

It is found on basalt and sandstone derived soils along watercourses, hillsides and scree slopes.