Herbs. Stems twining, densely pubescent and with brownish glands. Leaves pinnately 3-foliolate; stipules narrowly ovate, 4-8 mm; petiole 2-6 cm; petiolules 1-2 cm; terminal leaflet broadly ovate or circular-rhomboid, 2.5-6 × 2.5-4.5 cm, densely pubescent mixed with glandular hairs, abaxial surface with light green glands, base rounded-cuneate, margin entire, apex acuminate; lateral leaflets oblique at base. Raceme axillary, sparsely flowered; bracts elliptic, 4-8 mm, apex acuminate; peduncle 4-7 mm. Calyx 5-lobed, hairy, exterior glandular; tube 3-4 mm; upper 2 lobes connate at base, narrowly triangular, 5-7 mm. Corolla yellow with obvious purple striations, 1.3-1.5 cm; standard broadly obovate, 1.5-1.8 × 1.1-1.3 cm, glabrous, base auriculate, with adaxial callosity at base, apex emarginate; wings glabrous, clawed, 12.5-13 mm, base auriculate, apex emarginate; keel crescent-shaped, inflexed, obviously longer than wings, 14.5-16 mm, apex obtuse, not auriculate. Ovary ca. 5 mm, densely minutely villous, stipe ca. 5 mm; style 13.5-15 mm. Legume 2.5-3 × ca. 0.9 cm, densely micro-villous and glandular hairy. 2n = 22.
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A trailing shrub or creeper. It is hairy. It grows over 3 m long. The leaves have stalks. The leaves have 3 leaflets which are also stalked. The side leaflets only have short stalks. They are oval. The flowers are yellow with purple veins. The occur in long stalks in the axils of leaves. The fruit is a pod. It is oblong and slightly curved. It is hairy. It has 2 seeds.
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