Ziziphus
Ziziphus Mill., in Gard. Dict. Abr. ed. 4: s.p. (1754).
Shrubs or trees, erect or straggling, often climbing, evergreen or deciduous, often spinose. Leaves alternate, petiolate, entire or crenate, coriaceous, 3-5 nerved at the base, stipules usually 1 or rarely 2 or curved spines or absent. Inflorescence axillary or terminal cymes or thyrses. Flowers small, pentamerous, bisexual, pedicellate, yellow-green. Calyx tube shallow. Sepals ovate-triangular or triangular, keeled within. Petals cucullate, deflexed or incurved, rarely absent. Stamens 5, included or excluded, inserted below the disc. Disc shallow or flat, 5-10-lobed. Ovary globose, 2-4-loculed, sunk in the disk and adnate to its base; styles 2-4, usually free or partially united; stigma papillose. Fruit a globose or oblong drupe, base with persistent calyx tube, apex mucronulate; putaman woody, 1-3-celled. Seed 1-3, plano-convex, testa thin, smooth shining; cotyledons thick; radicle short.
Its native range is Tropics & Subtropics.