Tree, to 20 m tall and 40 cm dbh; inner bark reddish, granular; branchlets densely ferruginous-tomentose when young, glabrate in age; lenticels prominent. Petiole and rachis terete, tomentose; leaflets in (5) 7-10 (13) pairs, narrowly ovate to oblong-elliptic or oblong, acute to acuminate, obtuse to rounded at base, glabrous above except on midrib, tomentose below on veins, sparsely so on surface, the terminal pair 7-18 cm long, 2-4.3 cm wide. Spikes terminal or axillary, usually solitary or paired, the axis and calyx densely ferruginous-tomentose; bracts subulate, +/- 1 mm long; flowers sessile; calyx 7-10 mm long, densely villous, the lobes to ca 1 mm long; corolla 2-3 cm long, sericeous, the lobes narrow, to ca 4 mm long; stamens and style to ca 40 mm long. Legumes flat, 20-30 cm long, to 4.5 cm broad, tomentose when young, glabrate in age, remaining flat, often markedly curved, the margins stout, raised. Croat 8282, Foster 1418. Infrequent, along the shore. Flowers from September to April, principally at the beginning of the dry season. The fruits mature in the early to middle rainy season. Distinguished from I. thibaudiana by normally having nine or ten pairs of leaflets on some leaves and by having larger fruits, which are glabrate in age.
Bocas Species Database
Characteristics: Arbol de ± 10 m de alto, Numerosas flores blancas, glandulas entre los pares de foliolos. Tree ± 10 m tall, numerous white flowers, glands between pairs of leaflets.