Trees, often with buttresses. Leaves simple, large; petiole short; stipules minute, caducous. Flowers sessile, on old wood or in axillary, sometimes branched, spikes, not pea-flower shaped; bracts small, cupular. Calyx campanulate, bilobed or spathaceous, membranous. Petals usually 5, imbricate, connate into a tube in basal half. Stamens usually 10, of 2 lengths, alternating; filaments connate and forming a tube, almost entirely adnate to corolla tube; anthers at two levels, inside and at the rim of corolla tube. Ovary pubescent; ovule solitary; style very short. Fruit obliquely ovoid or ellipsoidal, compressed, indehiscent. Seed 1.
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