or semi-evergreen trees, trunk usually buttressed. Leaves alternate,
subopposite or spirally arranged, often crowded at the ends of the branchlets,
margin entire, or slightly crenulate or serrulate. Inflorescence in spikes,
racemes or panicles. Flowers actinomorphic, 5-merous, rarely 4-merous,
cupuliform. Sepals 5, connate in a
campanulate calyx, produced slightly beyond the ovary. Petal absent. Stamens
10, episepalous. Ovary 1-celled, ovules 2 or rarely 3, pendulous. Fruits
angular or 2-5 winged. Seed solitary.