Tree to 12 m., the young branchlets puberulent, longitudinally ridged. Leaves large, many-foliolate; petiole short, eglandular, puberulent; rachis up to 30 cm. long, like petiole; stipules triangular-bilobed, caducous; leaflets up to 20 pairs, oblong, 4-5 cm. long and up to 1.5 cm. wide, obtuse apically, rounded and unequal basally, puberulent below and above (more lightly so above), dull below, with about 20 pairs of lateral veins. Inflorescence terminal or axillary from upper branches; bracts caducous; pedicels 1-2 cm. long, lightly puberulent. Flowers yellow; sepals ovate to orbicular, about 7 mm. long, puberulent to glabrate, re-flexed, dark; petals obovate to orbicular, up to 1.5 cm. long, short-clawed, some-what venose; stamens 4-morphic, glabrous; the 3 lowermost gross, their anthers ovate-orbicular, 3-4 mm. long, with terminal pores; the 4 median anthers oblong, sagittate, 2-3 mm. long, with basal pores; 2 smaller, orbicular anthers less than 1 mm. long; and 1 stamen rudimentary; ovary essentially glabrous. Legume terete, elongate, up to 5 dm. long and 2 cm. wide, septate, glabrous.
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A tree. It grows 12 m tall. Young branches are hairy.