Podlech & Zarre (2013), vol. I, p. 708Plants 10–20(–30) cm tall, acaulescent, covered with thin, soft, white hairs 1−2 mm. Rootstock up to 7 mm thick, with a pluricipital root-crown, in upper part covered with remnants of old leaves. Stipules whitish-membranous, 8–16 mm, adnate to the petiole fo 2–3 mm, the lower ones ovate to oblong, obtuse, glabrous or very shortly ciliate, the upper ones narrowly triangular, long acuminate, densely ciliate at the margins. Leaves (7–)10–20(–30) cm; petiole 2–4(–6) cm, like the rachis sparsely to densely covered with spreading, unequal hairs 0.5−2(−3) mm. Leaflets in 12–17(–20) pairs, narrowly elliptic to narrowly obovate, rarely elliptic, 9−14(–18) × 2–5 mm, obtuse, un upper side glabrous, on underside hairy along the midvein or more rarely allover loosely covered with appressed to ascending hairs. Peduncle (0.5−)3−4(–5) cm, loosely to rather densely spreading hairy. Racemes 3−6-flowered. Bracts whitish-membranous, linear-acute, (6–)8–12 mm, long ciliate. Pedicels 5−6 mm, with spreading hairs or subglabrous. Calyx 10–15 mm, tubular, greenish, sparsely hairy especially at the teeth, the tube often quite glabrous; teeth narrowly triangular, 2.5−3 mm. Petals yellow. Standard 20–24 mm; blade 8−10 mm wide, ovate to elliptic, emarginate, subabruptly narrowed into the short claw. Wings 18–21 mm; blades narrowly oblong, slightly dilated upward, rounded, 8–10 × c. 2 mm; auricle c. 1.5 mm, claw 9–11 mm. Keel c. 16 mm; blades oblique-elliptic, with nearly rectangularly curved lower edge and ± sigmoid upper edge, furnished with minute teeth, slightly beak-like narrowed toward the obtuse tip, 6−7 × 3–4 mm; auricle scarcely 1 mm, claw 10–11 mm. Stamen-tube strongly obliquely cut at the mouth. Ovary with a stipe 2–3 mm, glabrous. Legumes with a stipe 2–3(−5) mm, ellipsoid, (16–)20–27 mm long, c. 10 mm high and (12−)15−17 mm wide, rounded to widely flattened ventrally and dorsally with prominent midvein, contracted into a straight beak 2−4 mm, incompletely bilocular; valves thinly coriaceous, pale brownish, glabrous or in the youth with few long hairs along the ventral suture; fruit opening only along the ventral suture. Seeds c. 5 × 3.5 mm, smooth, shiny, brown with minute blackish dots.
