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Stems striate, younger parts clothed with yellowish pubescence. Leaves trifoliolate, petiolate, stipulate; petioles up to 6 mm long; leaflets up to 2.3 cm long and 1.3 cm broad, elliptic-lanceolate to elliptic-obovate, mucronulate, densely nigro-punctate, pubescent on lower surface. Stipules up to 5 mm long, subulate, acute, glandular, pubescent. Inflorescence terminal, spicate. Peduncles up to 1 cm long. Flowers sessile or very shortly pedicelled, 2-3 together subtended by a bract. Calyx-tube 2.5 mm long, 6 mm in diameter, pubescent, glandular; lobes acute, pubescent, ciliate, glandular, pilose on the inner surface; upper and lateral lobes 2.5-3 cm long; lowest lobe 4 mm long, 1.5 mm broad. Vexillum 7 mm long, 6 mm broad, obovate with a short claw 2 mm long; alae 6.5 mm long, 2 mm broad, with a linear claw 3 mm long; carina 3.5 mm long, 2 mm broad, with a linear claw 3.5 mm long. Ovary pilose; style 3 mm long, pilose. Flowers: Yellow.
Perennial, diffuse shrub, up to 2 m high; stems densely leafy, covered with coarse, wartlike glands, young twigs tomentose. Leaves trifoliolate, penninerved. Leaflets: terminal leaflet elliptic or obovate, much larger than widely elliptic lateral leaflets; prominently nigro-punctate in dried specimens. Stipules small, deltoid-acuminate. Inflorescences of elongated, axillary spikes, laxly many-flowered. Flowers 2 or 3 together, white and purple. Flowering time Apr.-June. Pod pubescent.
