Deciduous, medium-sized to large trees up to 50m tall; bole up to 100(-250)cm indiameter, buttresses present or absent. Leaves alternate or opposite, bipinnate withup to 30(-42) pairs of pinnae; petiole and rachis usually with extrafloral nectaries;stipules small, caducous; leaflets opposite, sessile. Inflorescences compound,consisting of a stout twig to 50cm long, sparsely branched or unbranched, bearing 2-10(-more) flexible peduncles, each to 50cm or more long. Flowers in a long-stalked,pendulous, pyriform to clavate, dense head, sterile flowers at base of the head, maleones in middle portion and bisexual ones at apex, 5-merous; calyx long-tubular orfunnel-shaped with imbricate lobes; corolla longer than calyx; stamens 10, connatebelow, shortly exserted; ovary superior, short-stiped, style exserted. Fruit a linear tostrap-shaped or oblong pod, stalked, leathery or woody, usually indehiscent, many-seeded, usually several pods together in a pendent infructescence with swollenreceptacle. Seeds in 1 row, ellipsoid, with a pleurogram. Seedling with epigealgermination; cotyledons fleshy, peltate; epicotyl with a scale leaf and subsequentlybipinnate leaves. (Malaysia)