TREES with mucilaginous sap, tough inner bark and broad, dense head. Wood soft, white. Leaves alternate, deciduous, broad, unsymmetrical, toothed, with veins branching strongly on side next to petiole. Flowers creamy, fragrant, perfect, clustered in cynics; borne on narrow leaf-like blades. Fruit a dry, 1- to -secded, globular nut.