Tree to 20 or more m., the branchlets conspicuously lenticellate and fer-ruginous-puberulent towards the tip. Leaves large, even-pinnate, generally 12-foliolate; petioles 1-2 cm. long, terete or nearly so, ferruginous-puberulent, swollen basally; rachis about 15 cm. long, like the petiole except margined laterally above, bearing disc-like, sessile, generally depressed glands 1-2 mm. in diameter between insertion of the petiolules; leaflets usually 6 pairs, mostly elliptic, the uppermost often obovate-elliptic and up to 25 cm. long and 8 cm. broad, the lowermost usually only 1/3 or I/4 this size and somewhat ovate, short-acuminate apically, obtuse and somewhat inequilateral basally, the veins prominently reticulate and puberulent below, lightly indented above, the leaflet subglabrous and drying darker above; stipules caducous. Inflorescence terminal and subterminal, tomentulose, of 2-3 pedunculate spikes fasciculate from each of several nodes or axils, the spikes 3-4 cm. long, the floriferous portion ovate and about 1 cm. long. Flowers con-gested, white, subsessile; calyx subturbinate, 3-4 mm. long, contracted gradually baseward, densely puberulent; corolla 7-8 mm. long, strigose-puberulent; stamens many; filaments almost 2 cm. long, united below for at least half their length, the tube slightly exceeding the corolla; anthers minute. Legume reported 10-15 cm. long and 2-2.5 cm. wide, flat, rounded apically and basally, somewhat pubescent, the margins elevated.
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A tree. It is usually 10-15 m tall but can be 30 m tall. The leaves have leaflets in 4 or 5 pairs. The pair at the base are smaller. The young leaflets are hairy. The pods vary in size. They can be 7-22 cm long and 2-4 cm wide. They are yellow when fully ripe. The pods can be curved or straight.
Wet lowland areas. Tropical moist forests. Found mainly in lowland areas, growing in dry, loamy soils in old clearings or along the margins of forests.
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A tropical plant. It grows in wet and moist lowland forests. It can also grow up to 2,000 m above sea level.