Herbs, erect, 50-100 cm tall. Branches terete, densely rusty spreading pilose. Stipules broadly lanceolate, 1-3 × 0.3-0.5 cm. Leaves simple, nearly sessile; leaf blade lanceolate to broadly lanceolate, 5-7(-8) × 0.5-1.5 cm, both surfaces sparsely pilose, base cuneate, apex obtuse. Racemes terminal, 6-9-flowered; bracts lanceolate, 5-8 mm. Pedicel 2-3 mm; bracteoles inserted at base of calyx tube, similar to bracts, 6-10 mm. Calyx 2-lipped, 0.8-1.5 cm, parted to base. Corolla yellow; standard narrowly elliptic, 1.2-1.5 cm, base with 2 appendages, apical half pilose; wings lanceolate-oblong, 1.2-1.4 cm; keel slightly longer than wings, narrowed apically from middle and extended into a long suberect twisted beak. Legume broadly oblong, 2-3 × 1.2-1.5 cm, 20-30-seeded. Fl. Aug.
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