Sturdy herbaceous vine; stems tomentose with yellowish spreading hairs. Leaves ovate, often shallowly trilobate, apically obtuse or rounded, mucronate, basally obtuse or rounded, mostly densely whitish tomentulose, more so beneath; petiolules tomentose; petiole and rachis pilose, the rachis short; petiole mostly shorter than the leaflets; stipels 1-2 mm long, elliptical or spatulate, ciliate but otherwise glabrate; stipules subulate, 4-6 mm long. Inflorescences few flowered congested pseudoracemes; peduncles mostly 12-30 cm long, slender, tomentu-lose; bracteoles 2, 6-8 mm long, subtending the calyx, subulate, caducous; bracts deltoid, ca. 2 mm long; pedicels stout, densely sericeous, 4-5 cm long. Flowers yellow, the calyx sericeous, campanulate, 6-9 mm long, the teeth slightly shorter than the tube; standard deeply emarginate, 1.5-3 cm long, the keel spiralled. Legume linear, 5-8 cm long, 5-8 mm wide, maturing black, pilose with subap-pressed tawny hairs, scarcely compressed between the seeds; seeds nearly black, shiny, 3-4 mm long, compressed subglobose, the hilum elevated and surrounded by an aril.
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