Perennial vine; stems pilose with weak spreading or appressed hairs. Leaves pinnate trifoliolate; leaflets ovate, rhombic, elliptical oblong or linear, sometimes shallowly lobed, mostly 2-4 cm long, 1-3 cm wide, sericeous to short pilose, perhaps sometimes scabridulous; apically obtuse, mucronulate, basally truncate; petiolules ca. 1 mm long, tomentose; petioles pilose, drying strongly angled, sometimes longer than the terminal leaflet; rachis short; stipels lanceolate, ca. 1 mm long, long ciliate; stipules lanceolate subulate, 3-5 mm long, nervate, ciliate. Inflorescences 20-30 cm long, the flowers clustered at the apex or distributed along the top half of the peduncle, mostly paired; peduncle glabrate; bracteoles and bracts ovate, acuminate, nervate, ciliolate, 1-2 mm long; pedicels stout, 0.5-1 mm long. Flowers red to violet; calyx tubular campanulate, pubescent, the tube ca. 3 mm long, the teeth deltoid, the upper pair connate; standard ca. 1.5 cm long. Legume linear, straight or slightly falcate, 3-6 cm long, 2-3 mm wide, turgid.
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