Trees. Leaves entire (in ours); petiole swollen at the base and at the apex. Flowers unisexual, borne on fascicles on older wood. Calyx 4-5-lobed. Petals 0. Male flowers: anthers borne in 1(-2) rings on an androphore. Female flowers: carpels 4-5, coherent. Fruit consisting of woody carpels which split longitudinally.