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Leaflets (1)3, often paler beneath, 1.3–21 × 0.5–4(6) cm, ovate or elliptic to linear-lanceolate, usually acute or somewhat rounded but mucronulate at the apex, rounded or even minutely subcordate at the base, sparsely puberulous or pubescent above, pubescent particularly on the nerves beneath, densely covered on both sides with orange-red glands; venation pale, raised beneath; petiole 0.7–4.5 cm long; rhachis 2–18 mm long; petiolules 1–2 mm long; stipules leafy, green, 10–21 × 1–6.5 mm, lanceolate, falcate (rarely in depauperate plants, linear stipules 6 × 0.5 mm are found), acuminate, pubescent, hairy and glandular outside, veined.
Racemes terminal, the flowering part 1.5–8 × 1.5–2.2 cm; peduncle 1–6 cm long, pubescent; pedicels 1.5–2 mm long; bracts soon falling, 6–10 × 2–3 mm, ovate-lanceolate to lanceolate, pubescent and glandular outside, the margins ciliate.
Standard greenish-yellow, (6)8–14 × (2)5.5–9 mm, obovate, glabrescent or slightly puberulous, very densely covered with orange-red glands; wings brighter yellow, glandular; keel greenish-yellow, glandular.
Calyx finely pubescent and glandular, (2.5)4–5 mm long; lobes equal or unequal, narrowly triangular or triangular, longer or shorter than the tube.
Erect perennial herb 9–60 cm tall, often ± unbranched; rootstock woody, spindle-shaped or globose, up to 4 cm thick, with lateral tubers.
Pods 10–12 × 5–7 mm, elliptic-oblong, covered with long white or ferruginous hairs and also with a fine pubescence as well.
Seeds brown or black, 2.5–3.5 × 2 × 0.6–1.2 mm, oblong; rim aril white or cream-coloured.
Branches shortly pubescent and with some long hairs.
