Slender vine, stems with long, sparse sturdy tawny hairs. Leaves pinnate trifoliolate, the leaflets ovate, mostly 4-10 cm long, 3-6 cm wide, apically acuminate, basally rounded or obtuse, thin, drying concolorous, with inconspicuous, scattered hairs on both sides, petiolules 3-4 mm long, drying angled, hispidulous; petioles often exceeding the terminal leaflets; stipels ovate, 1-2 mm long, glabrous, glandular; stipules linear lanceolate, 3-5 mm long, ciliate. Inflorescences 5-20 cm long, axillary; peduncle terete, retrorsely hispidulous pilose with tawny hairs, the rachis tomentose with whitish, somewhat curly hairs, ca. 2 mm long, the nodes prominent; bracteoles and bracts linear ascending pilose, ca. 4 mm long, deciduous; pedicels ca. 1 mm long, ca. 2 per node. Flowers yellow, the calyx cupular, 2-3 mm long, the 5 teeth obtuse deltoid, sparingly ascending pu-bescent; standard orbicular ca. 1 cm long, the keel spiralled. Legume linear, turgid, 3-4 cm long, 4-6 mm across maturing black, ascending pilose with tawny hairs; seeds subglobose, shiny, 3-4 mm long.
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