Small trees or shrubs; branchlets glabrous; stipulate or exstipulate; spines
present or not. Leaves spiral or alternate, variable in shape and texture. Flowers
bisexual, rarely unisexual, in axillary or extra-axillary cymes. Sepals 4-5-lobed.
Petals 4-5, reflexed. Stamens inserted on the margin of the disc. Disc flat or
cupular. Ovary immersed in the disc, emerging part subglobose or triangular,
3-loculed, rarely 2-loculed; ovules 2 in each locule; stigmas 3. Capsule subglobose,
loculicidal, 2-6-seeded. Seeds ellipsoid, arillate.
Tropics and subtropics of the world; ca 60 species, 18 in India.
KEY TO THE SPECIES
1a. Branches armed
2
b. Branches unanned
13
2a. Spines bearing leaves and flowers
3
b. Spines not bearing leaves and flowers
5
3a. Fruits globose; ovary 2 loculed; branchlets not zig zag