Robust twining vine; stems pubescent just above the nodes, otherwise often glabrate. Leaves pinnate trifoliolate, leaflets broadly ovate to rhombic 5-9(-15) cm long, sharply short acuminate, basally obtuse or cuneiform, shiny and glabrate above except on the midvein, copiously appressed pubescent beneath with straight white hairs; petiolules 3-4 mm long, drying dark, glabrate except tomen-tose ventrally; rachis and petiole drying with a conspicuous dorsal groove near the ends, glabrate to pilose; rachis 10-25 mm long, petiole mostly shorter than the terminal leaflet; stipels subulate, exceeding the petiolules, stipules obtuse, ca. 5 mm long, conspicuously striate, ciliolate. Inflorescence axillary, few flowered; peduncles stiff, drying dark, 2-10 cm long; bracts caducous; bracteoles 2, inserted at the top of the pedicel, spathaceous, 10-20 mm long, conspicuously nervate, apically ciliolate, often drying dark; pedicels 6-10 mm long. Flowers showy; calyx cupular, 4-6 mm long, the teeth undulate except for the slightly longer lowest tooth, glabrate; standard orbicular, emarginate, nearly flat, 5-6 cm across, white outside, purple inside, pubescent outside, wings and keel purple. Legume linear, flat, 10-14 cm long, ca. 10 mm wide, thick margined, mostly drying black, glabrate; seeds ellipsoidal, rhomboidal, 6-9 mm long, dark brown, the hilum along one corner.
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A vine. It is twining. It grows 5 m long. The stems are smooth, cylinder shaped and green. The leaves are alternate and have 3 leaflets. The leaflets are 4-11 cm long by 3-8 cm wide. The edges are wavy. The upper surfaces are shiny and sunken over the veins. The lower surfaces are dull and hairy. The end leaflet is D shaped. The side leaflets are narrowly oval. The leaf stalks are 6-10 cm long. The flowers occur singly or in pairs in axils near the ends of branches. They are at the end of long stalks. They are pink to red. The pods is flattened and narrow. They are 10-15 cm long by 1 cm wide. There is a long tip at the end. The edges are thickened.
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