Moderate-sized tree, the branchlets dark hirsute-tomentose. Leaves moderate, the leaflets 6-or 8-foliolate; petiole about 2 cm. long, heavily tomentose, terete and unwinged; rachis up to 15 cm. long, with prominent interfoliolar wings about 5 mm. wide from rib to margin, the rib tomentose, the wings more lightly pubescent, with small, sessile, subcupuliform glands between insertion of the leaflets; leaflets apparently 3 or 4 pairs, mostly ovate, up to 15 cm. long and 7 cm. wide terminally, progressively smaller baseward, apically acute and short-acuminate, basally in-equilaterally rounded or obtuse, rather heavily pubescent with curved hairs below and above; stipules triangular-ovate, about 6 mm. long, soon deciduous. In-florescence of 1 to few? pedunculate spikes axillary from the upper leaves, the peduncular portion hirsute-tomentose, about 4 cm. long, the floriferous portion less heavily pubescent, 3-5 cm. long; bracts ovate-elliptic, about 6 mm. long, caducous. Flowers white, very elongate; calyx tubular, 13-17 mm. long, longitudinally striate or sulcate, subglabrous except at the apex of the teeth, the teeth 1-2 mm. long; corolla 4-5 cm. long, pilose without (sparingly so in age), the hairs 3 mm. long or longer, the lobes somewhat flaring, about 5 mm. long; stamens up to 10 cm. long, the staminal tube exserted about 2 cm. beyond the corolla; ovary tetra-gonal and indented on opposite faces. Legume up to 30 cm. long and 5 cm. wide, usually spirally twisted, densely ferruginous-strigose, the margins deeply sulcate along the line of dehiscence.
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