Trees. Leaves alternate, simple, long-petiolate; stipules caducous. Inflorescence terminal, cymose-paniculate. Flowers bisexual, actinomorphic or appearing slightly zygomorphic. Epicalyx absent. Calyx 5-lobed, valvate. Petals free, imbricate-contorted, inserted at base of androgynophore. Stamens numerous, united into a short tube at apex of columnar androgynophore and surrounding ovary; anthers sessile, in 5 groups. Ovary borne on apex of androgynophore, lobed, 5-celled; cells 1-ovulate. Fruit a capsule, 5-lobed, star-shaped in transverse section, borne on accrescent androgynophore.
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