Ziziphus williamii Bhandari & Bhansali in M.P. Nayar et al., Fasc. Fl. India 20: 112. 1990.

Trees, up to 4 m tall; branches straight, yellow, glabrous, fluted; spines in pairs, one straight often wanting, the other recurved. Leaves alternate, ovate or elliptic, 3 - 5 x 1.5 - 3.7 cm, apex acute or obtuse, mucronate, rounded or slightly tapered at base, glabrous, crenate, each crenation gland-tipped with deciduous, black mucro, basally 3-nerved; secondary veins diverging from the midvein at an angle of 40°-60°; camptodromous near the margin; petioles 8.7- 15 mm long, glabrous, 4 mm across. Peduncles 2 - 4 mm long, pubescent; pedicels 3-5 mm long, pubescent. Calyx deltoid; lobes 1.5 mm long, acute, thickened at the apex, keeled up to the middle, glabrous within, pubescent without. Petals obovate, 1 mm long, markedly clawed, deeply cucullate, enclosing stamens. Stamens about as long as petals. Disc 5 - 10-lobed; lobes opposite the calyx lobes, emarginate, glabrous. Ovary bicarpellary, bilocular, nearly hidden by the disc. Fruits obovate, 8 mm in diam., glabrous, 2-cel1ed. Seeds 2, black, 5 x 5 mm. compressed.

Fl. & Fr. : Nov. - Mar.

Distrib. India: Mostly near the sea coasts. Gujarat and Maharashtra.

Endemic.