Tree, to 9 (25) m tall; branchlets lenticellate, minutely ferruginous-pubescent, sometimes ribbed below petioles. Petiole and rachis unwinged, minutely margined, minutely pubescent; leaflets in (4) 6-7 (8) pairs, obovate-oblong to obovate, short-acuminate, obtuse to rounded at base, glabrate but with puberulent veins, the terminal pair 15-25 (34) cm long, 4.5-8 (12) cm wide. Spikes axillary (appearing paniculate on new growth) in groups of 1-4; peduncle and rachis tomentose; peduncles 1-2.5 (4.5) cm long; rachis 1-1.5 cm long; flowers dense, very short-pedicellate; bracts ca 1 mm long; pedicel and calyx sparsely pubescent; calyx 3-5 mm long, the lobes ca 0.5 mm long; corolla minutely, sparsely pubescent, 7-9 mm long, the lobes ca 1.5 mm long; stamens and style to 4 cm long. Legumes flat, minutely puberulent, curved slightly, to 16 cm long and 4 cm wide, the marginal ribs prominent. Croat 8436. Infrequent or rare; collected along the shore of Gigante Bay and the shore of Bat Cove. Seasonal behavior uncertain. Flowers from August to April, possibly with individuals flowering twice a year. Fruit maturity period not determined. Nicaragua to Peru and Brazil. In Panama, known from tropical moist forest in the Canal Zone, Bocas del Toro, Colón, Panama, and Darien.