Much branched tree of 15–40 ft. in height; extremities pubescent, at length glabrous. Leaflets in 10–18 pairs, at intervals of 2–3 lines, sessile, coriaceous, obliquely oblong-lanceolate obtuse, the somewhat eccentric midrib often terminating in a minute mucro, base unequal, shortly pubescent or tomentose-pubescent or at length subglabrate, 1/2– 3/4 in. long. Flowers subsessile, in short, dense, ferruginous racemes or glomerules in the upper axils, or more or less confluent in terminal oblong panicles of 1 or 2 in. scarcely overtopping the leaves. Bracts ovate concave 1–1 1/2 lines long. Involucral bracteoles rotundate, concave, about 2 lines long. Perianth reduced to about 5 obovate or oblong-ciliate scales, 1 line or less in length. Stamens 10, glabrous, filaments connate in a very short ring at base. Ovary subsessile, densely villous; ovules about 7. Legume oblong or from lanceolate to oblanceolate-oblong at right angles to the short stout gynophore of 1/6– 1/4 in., the ventral suture dilated and terminating in the more or less persistent, rigid, subulate, straight base of the style; valves thickly coriaceous, at length smooth; 3–3 1/2 in. long, 1–1 1/4 in. broad.
