Podlech & Zarre (2013), vol. I, p. 183Plants 8–35 cm tall, mostly nearly glabrous, hairs 0.3–0.5 mm. Rootstock branched, often with ± long, slender stolons covered with scaly stipules. Stems solitary or several, erect or ascending at the base, at the base 2–5 mm in diameter, slightly sulcate, covered in the lower part with scaly stipules, glabrous ore more rarely sparsely hairy, especially at the nodes. Stipules green, often quickly becoming pale, 10–20 mm, ovate to narrowly ovate to oblong, dilatated at the base into an auricle like outgrowth, obtuse to subacute, with a ± distinct net of nerves, free, glabrous or sometimes sparsely ciliate. Leaves 5–15 cm; petiole 1–3 cm, like the rachis glabrous or very sparsely to sparsely appressed white hairy. Leaflets in (3–)4–6(–8) pairs, narrowly ovate to narrowly elliptic, 15–35(–45) × 7–17 (–19) mm, rounded to subacute, dark green on upper side, glabrous or rarely very sparsely hairy, on underside light grey-green with a distinct darker net of nerves, sparsely or more rarely loosely appressed hairy or rarely nearly glabrous. Peduncles 5–10 cm, slightly sulcate, sparsely, toward the raceme more densely appressed black hairy, more rarely nearly glabrous. Racemes rather densely 5–20-flowered; axis black hairy or more rarely nearly glabrous. Bracts greenish, 5–10 mm, narrowly ovate, at the margins and toward the tip sparsely covered with white and predominantly black hairs. Pedicels 2–3 mm, erect, black hairy. Calyx shortly tubular, 6–9 mm, slightly gibbous at the base, obliquely cut at the mouth, yellowish, in basal part glabrous or very sparsely, toward the teeth more densely white or black hairy, sometimes with black hairs only at the teeth; teeth equal, triangular, 0.3–1 mm, black hairy, sometimes with white hairs mixed in, black hairy on inner side. Petals pale yellow. Standard 14–17 mm; blade obovate to nearly orbicular, c. 8 mm wide, deeply emarginate, narrowed at the base into a long, widely cuneate claw. Wings 13–16 mm; blades narrowly oblong, rounded, 5–8 × 2–2.2 mm; auricle 1–1.5 mm, claw 8–9 mm. Keel 13–15 mm; blades triangular-elliptic with widely rectangularly curved lower edge and slightly sigmoid upper edge, subacute, 5–7 × 3–3. mm; auricle wide, 0.5–1 mm, claw 8–9 mm. Stamen-tube strongly obliquely cut at the mouth. Ovary with a hairy stipe 5–6 mm, black hairy. Legumes with a stipe up to 8 mm, pendulous, inflated, narrowly ellipsoid, acuminate at both ends, 10–25 mm long, 3–4 mm high and 5–7 mm wide, ventrally and dorsally flat, unilocular; valves membranous, sparsely to loosely or rather densely covered with very short appressed black hairs, more rarely also with white or only with white hairs, sometimes also glabrous (glabrous and hairy pods in the same population and even in the same plant). Seeds few, brown or olive brown, glossy, 3 × 2.5 mm. Chromosome number: 2n = 16 (TAKHTAJAN 1990).
