Lianas. Stems appressed villous, glabrescent and grayish yellow in second year. Leaves 9-or 11(or 13)-foliolate; rachis 13-17 cm, including petiole 3-4 cm; petiolules sparsely hirsute; leaflet blades elliptic to ovate-oblong, 2.5-5 × 1-1.8 cm, both surfaces sparsely hirsute especially on midvein, base broadly cuneate to rounded, apex obtuse and apiculate. Racemes 10-18 cm. Pedicel 6-12 mm, villous. Flowers ca. 1.5 cm. Calyx with abaxial tooth as long as others. Corolla purple; standard suborbicular, outside sparsely villous, base subcordate, apex emarginate. Ovary tomentose. Legume and seeds not seen.
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