Unarmed, erect, very tall tree; bark brown, hard, thick; petioles with solitary gland, primary rachis about 30-40 cm long, glabrous; leaves bipinnate, feather like, pinnae 10-12 pairs, pinnules 50-60 pairs per pinna; leaflets ligulate, membranous, linear; flowers small, fragrant, yellow in dense, globose turbinate, heads, long peduncled 30-50 cm, axillary, pendulous; bract persistent, coriaceous, clavate, apex dilated; calyx tubular, 5-toothed, glabrous, teeth pilose; corolla 5-toothed, connate at base; stamens 10, monoadelphous, staminal tube long, filaments long, anthers minute, eglandular, pollen cohering into irregular masses; ovary shortly stalked, few to many ovuled, glabrous, style filiform, stigma capitate; pods elongated, narrowed gradually into long stalk, glabrous, dehiscent, brown, strap shaped, slightly constricted between the seeds; seeds 6-13, large, ovoid, compressed.