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Corolla bright yellow; standard 11–12 mm long, obovate, obtuse and deeply emarginate at apex, with wavy or crisped margins, sericeous outside; wings c. 8 mm long, obovate, obtuse, asymmetrical at the base, with rows of folds between the upper veins, glabrous; keel as long as the wings, curved, obtuse, glabrous.
Perennial herb, 0.1-0.5 m high; sparsely branched, resprouting, tuberous, stems usually high and always slender. Leaves with lower leaflets petiolate, widely obovate, elliptic to lanceolate; upper leaflets subsessile, filiform or oblanceolate, conduplicate. Flowers solitary. Flowering time Sept.-Mar.
Leaves distant, sessile or petiolate; leaflets appressed pubescent, those of the lower leaves 8–20 × 2.5–4 mm, narrowly elliptic, those of the upper leaves 15–27 × 1–3 mm, oblanceolate to linear; petiole up to 1.5 mm long; stipules 2–4.5(6) mm long, subulate, decurrent on the stem as a ridge.
Sparsely branched, resprouting, tuberous shrublet to 30 cm. Leaves 3-foliolate, dimorphic, lower petiolate with broadly obovate, elliptic to lanceolate leaflets, upper subsessile with linear to oblanceolate, conduplicate leaflets. Flowers solitary, sessile, yellow.
A slender herb. It grows 30 cm tall. It has a small tuberous root. The leaves have 3 leaflets. The flowers occur singly and are yellow. The pods are 35 mm long by 3.5 mm wide.
Calyx 9–10 mm long, sericeous; upper lip 6.5–8 mm long, 2-lobed to near base; lower lip as long as the upper one, 3-lobed, the lobes c. 3.5 mm long, acuminate.
Stems simple or few-branched, erect or ascending, up to c. 40 cm high and 0.6–0.8 mm in diameter, glabrous or silky hairy to the apex.
Stamens united into a sheath c. 8 mm long, split above; anthers glabrous, the longer ones 1.1 mm long.
Inflorescence leaf-opposed, sessile or very shortly pedunculate, 1–2-flowered.
Slender herb, from a small tuberous rootstock or slender rhizome.
Ovary sericeous; style c. 1 mm long, sericeous.
Pod c. 35 × 3.5 mm, compressed, pubescent.
Seeds not seen.
