Lianas, to 15 m. Branchlets brown, yellow tomentose when young, glabrescent, scattered with brown lenticels. Leaves 13-17-foliolate; rachis 30-50 cm, including petiole 7-9 cm; leaflet blades elliptic-oblong to lanceolate-oblong, 10-18 × 3.5-4.5 cm, papery, abaxially brown appressed sericeous, adaxially flat and glabrous, base cuneate to rounded, apex acute. Pseudoracemes with 2-6 branches beneath new stems, 15-30 cm, brown tomentose; rachis nodes with 2-5 flowers clustered on a 1-3 mm spur. Pedicel 6-8 mm. Flowers 2.1-2.3 cm. Calyx ca. 6 mm. Corolla lilac; standard obovate, glabrous or ciliate on apical margin, without basal calluses. Ovary tomentose, with 5-7 ovules. Legume dark brown, oblong or when 1-seeded ovoid, 5-25 × ca. 4 cm, inflated, densely covered with pale yellow warts, glabrescent; valves thick, woody. Seeds 1-5 per legume, dark brown, reniform, 2.5-3.5 × ca. 2 cm. Fl. Apr-Jun, fr. Jul-Nov. 2n = 22.
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A woody vine. The stems are twining. It can grow 15 m long. It has rough pale yellow warts. The leaves have 13-17 leaflets. The flowers are lilac coloured. The fruit are dark brown oblong pods with yellow warts.
Can be grown by seedlings. Seeds needs soaking.
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