Erect robust many-stemmed perennial herb up to 1.5 m high, from a woody rootstock. Stems herbaceous and pithy above, branching, glabrous. Leaves 5-13.5 cm long; leaflets 2-9 on each side of the rhachis, opposite or distally subopposite, 6-25 x 2-9 mm, linear-oblong or obovate, truncate to emarginate and mucronulate at the apex, cuneate at the base, very sparsely white hairy beneath, glabrous above; petiole 1-1.5 cm long, with very sparse white hairs; rhachis 1.5-12 cm long, sulcate on the upper side; petiolules up to 1 mm long, with sparse white stiff hairs; stipules 1-3 mm long, lanceolate, with white stiff hairs at the margins. Racemes up to 4 cm long, many-flowered; peduncle 3-8 mm long; bracts 1-1.5 min long, ovate-lanceolate, with still white hairs at the margins; pedicels 7 mm long; bracteoles at the base of the calyx, minute, with stiff hairs. Calyx 2.5-3 mm long, campanulate, divided halfway into 5 equal teeth, with stiff hairs only at the margins. Corolla 8 mm long, yellow-greenish with tire standard and wings streaked with purple-violet-bluish; standard c. long and 6 mm wide, obovate, rounded and shortly emarginate at the apex, tapering at the base into a linear claw; wing petals c. 7 mm long including the 2 mm long filiform claws, the blades c. 2 mm wide, falcate-oblong, auriculate at the base; keel petals c. 8 mm long including the 3 mm long linear claws, the blades 2.5 mm wide obovate, rounded at the apex, auriculate at the base. Filament sheath up to long; free parts of the filaments 2.5 mm long; free stamen 6 mm long; anthers less than 1 mm long. Ovary c. 4 mm long, oblong, up to 7-ovulate, glabrous; style 2 mm long. Pod 1.5-4 x 1-2 cm, ovate or obliquely elliptic, sometimes with the dorsal suture arched, acute to obtuse or rounded at the apex, cuneate to rounded at the base and abruptly tapering into a 2-3 mm long stipe, membranaceous, translucent, brownish, glabrous. Seeds 1-7, obliquely oblong-reniform, 5 x 3.5 mm, dark brown.
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