Herbs, perennial. Stem 1-1.5 m tall, striped, densely yellow-brown scaly glandular punctate, nearly glabrous. Leaves 6-20 cm, 9-15-foliolate; stipules lanceolate, ca. 5 mm; petiole glabrous, densely glandular punctate; leaflets lanceolate or ovate-lanceolate, 2-6 × 1.5-2 cm, glabrous, densely scaly glandular punctate, base cuneate, margin serrulate, apex acuminate with mucro. Racemes much flowered, oblong or globose; rachis shorter than leaves, densely brown glandular punctate and pubescent; bracts ovate-lanceolate, 6-8 mm, membranous, glandular punctate. Calyx campanulate, 4-5 mm, densely glandular punctate and sparsely pubescent at base, lanceolately 5-toothed. Corolla light purple, purple, or purple-red; standard ovate, 6-8 mm, base shortly clawed, apex rounded; wings 5-6 mm; keel shorter than wings. Legume ovoid, 10-17 × 6-8 mm, rigidly spiny, apex abruptly acuminate. Seeds 2, black, ca. 2 mm. Fl. Jun-Jul, fr. Jul-Sep. 2n = 16*.
Pebbles and slopes in river valleys.. Riverbanks, open valleys by streams, open slopes, margins of farms, roadsides; at elevations from 2,600-3,100 metres.
Can be grown by divisions or seedlings. Seeds needs soaking.
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