Large, evergreen, unarmed trees, 15-30 m tall with dense crown and fissured, rough bark; branchlets tomentose; stipules caducous, linear, lanceolate; leaves alternate, even pinnate, leaflets 10-20 pairs, opposite, linear-oblong, obtuse, entire; racemes lax, few flowered, terminal on short branchlets; pedicels articulated at the base of calyx; flowers yellow with pink tinge; bracts boat shaped, enclosing the bud, caducous; pedicels short; calyx tube turbinate, lobes 3, subequal, imbricate, lower 2 connate; petals only 3 developed, yellow striped with red, upper hooded, lateral-2 ovate, lower-2 reduced to scales; stamens 3, perfect, others reduced to bristles, monadelphous, filaments pubescent, anthers oblong, versatile; ovary stipitate, many ovuled, style filiform, stigma capitate; pod linear, ligulate, slightly compressed, falcate, thick, fruit wall with thin crustaceous epicarp, thick pulpy mesocarp, indehiscent; seeds 3-10 or more, obovoid, orbicular, compressed.