Suffrutescent to woody vine, the stems angled, becoming terete, strigulose to puberulose. Leaves trifoliate, the leaflets ovate, ovate rhombic to lanceolate, 3.0-10.0 cm long, 2.5-8.0 cm wide, apically acute to acuminate, basally rounded to cuneate, sparsely villous, gland dotted below, glabrous to sparsely villosulose above; petiolule of terminal leaflet 1.5-3.0 cm long, petiolule of lateral leaflet 0.2-0.4 cm long; petiole 2.5-8.0 cm long, villosulose; stipels absent; stipules lanceo-late, 2.0-3.0 mm long, 0.5-1.0 mm wide, caducous. Inflorescence branching, equal to or exceeding the leaves, 5.0-13.5 cm long; peduncles 0.6-1.0 cm long; pedicel 1.0-2.0 mm long; bracts lanceolate, 1.5-3.0 mm long, 0.5-2.0 mm wide, caducous. Flowers with the calyx not exceeding the corolla, 3.0-4.0 mm long, the lobes of the calyx lanceolate, 1.0-2.0 mm long, villosulose, gland dotted; corolla yellow with maroon striations, 5.0-7.0 mm long, the standard obovate, auriculate, 5.0-7.0 mm long, 4.5-6.0 mm wide, the claw ca. 1.0 mm long, the wings oblong, 5.0-7.0 mm long, 1.5-2.5 mm wide, the claw ca. 1.0 mm long, villosulose, the keel falcate, 5.5-7.5 mm long, 2.0-3.0 mm wide, the claw 1.5-2.0 mm long; stamens 5.0-7.0 mm long, vexillary stamen free. Fruits ovate, deeply constricted in the middle, 1.5-2.0 cm long, 0.5-1.0 cm wide, brown to black, hirsutulose, gland dotted, the beak ca. 1.0 mm long; seeds 2, ovoid, ca. 4.0 mm long, ca. 3.0 mm wide, black with a red band around, the hilum ovate, ca. 3.0 mm long.
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