Trees or shrubs, with resin ducts in the twigs. Leaves alternate, simple or compound, crowded together at the ends of branches, exstipulate. Flowers small, actinomorphic, unisexual or bisexual, sometimes polygamous, usually hypogynous, usually in panicles or racemes. Calyx (1-)4-5(-6) partite, sometimes accrescent, persistent. Petals (3-)4-5 or 0, longer than calyx, free, imbricate. Stamens usually as many as or twice as many as petals, none or rudimentary in female flowers, inserted under the disc; filaments free, sometimes very short; anthers bithecous, usually versatile. Disc flat, cupulate or annular, entire or lobed, rarely obsolete in female flowers. Ovary usually superior, sessile, ovoid, rudimentary in the male flowers, 1 or 2-6-(12)-locular, ovule solitary in each cell, pendulous or ascending; styles usually 3 or 4, free or united. Fruits various, dry or drupaceous with a resinous mesocarp, stones hard, 1-seeded. Seeds exalbuminous.
79 genera and about 700 species