Evergreen shrub or tree up to 10 m. tall, or a liane; young stems dark brown pubescent. Stipules narrowly triangular, 2–3 mm. long; leaf-rhachis shortly pubescent or glabrescent, up to 25 cm. long, including a petiole of up to 12 cm., prolonged 1–2 cm. beyond the lateral leaflets; stipellae absent; petiolules pubescent or glabrescent, up to 8 mm. long; leaflets 7–9, opposite or alternate, oblong-lanceolate, up to 17 cm. long by 6 cm. wide, rounded or acute at the base, with a narrow acute acuminate tip up to 15 mm. long at the apex, glabrous; midrib impressed above; main nerves 6–8 on each side, not reaching the margin. Panicles brown pubescent, terminal and axillary, the floriferous branches several cm. long and many-flowered; bracts narrowly triangular; bracteoles similar, ± 1 mm. long, at the base of the calyx; pedicels up to 5 mm. long. Calyx sparsely and minutely brown pubescent, the tube 5 mm. long, the teeth broadly triangular, ± 0.3 mm. long. Corolla glabrous, greenish-white at first, later purplish-red; blade of standard ±10 mm. wide by 9 mm. long, not ridged or appendaged at the base, claw ± 2 mm. long; blade of wing ±10 mm. long by 3 mm. wide, claw 3 mm.; blade of keel almost beaked, slightly auricled, 10 mm. long, claw 5 mm. Vexillary stamen free, straight; filament-sheath 6–10 mm., free parts 3–6 mm., anthers 0.8 mm. long. Disc 10-lobed. Ovary ± 9 mm. long, densely appressed pubescent, 8–9-ovulate; style curved, erect at the tip, 5 mm. long; stigma minute, discoid. Pod flat at first but sometimes, or perhaps always, becoming turgid when fully mature, up to 18 cm. long, 3 cm. wide and 2.5 cm. thick, glabrescent, 2–5-seeded. Seeds closely contiguous, longitudinal, blackish, subcylindric, 13–42 mm. long, 17–22 mm. wide, 15–20 mm. thick, truncate at the ends; aril absent; funicle not swollen.
