Ziziphus spina-christi, known as the Christ's thorn jujube, is an evergreen tree or plant native to the Levant, East Africa, and Mesopotamia.

[3] Fruit and leaves from the tree were used in preparing ancient Egyptian foods, in cultural practices, and in skincare routines - especially with qasil powder derived from the Ziziphus spina-christi tree leaves.

[7] The seed, contained within a small, oblong woody pit, is opened and eaten by local fauna, including the rock hyrax.

In the Levant and wider Middle East, it is called sidr (associated with the lote tree of the Quran), and is common in the Jordan Valley and around Jerusalem,[8] as well as in the Hajar Mountains of the Sultanate of Oman.

[10] Matthew George Easton argues that Z. spina-christi is too brittle to be bent into a crown, and suggests another local plant, Ziziphus lotus.