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Corolla pubescent outside, dark yellow or orange, usually marked with reddish or purple, dark brown or black when dried; standard shortly clawed, 8–9 mm long, ovate to subcircular; wings as long as the standard, narrowly obovate, with narrow claws, asymmetrical at the base and auriculate on one side, with rows of folds between the upper veins; keel 6–6.5 mm long, incurved, obtuse at the apex.
Leaves distant, lower ones often with leaflets narrowly elliptic, up to 16 × 4 mm, the upper ones with leaflets linear-lanceolate to linear, 11–80 times as long as broad, 20–40 × 0.5–2.3 mm, acute, sericeous to subglabrous; petiole 4–12 mm long, subglabrous; stipules 6–12 mm long, subulate or lanceolate-setaceous, slightly longer or shorter than the petiole, decurrent to the stem as a ridge.
A slender herb. It keeps growing from year to year. It has a tuberous rootstock. The stems have few branches. They are 60 cm high. The leaves have 3 leaflets. The leaflets are narrowly sword shaped. The flowers are in groups of the top of the plant. They are reddish-brown on the outside and orange-yellow on the inside. The fruit are pods 5 cm long. They are narrow and almost straight.
Perennial herb, 0.5(-0.9) m high; slender, sparsely branched, resprouting, tuberous. Leaflets dimorphic; lower ones petiolate, widely obovate to narrowly oblanceolate; upper ones subsessile linear to oblanceolate, conduplicate. Inflorescences of terminal racemes. Flowering time Sept.-Apr.
Sparsely branched, resprouting, tuberous shrublet to 30 cm. Leaves 3-foliolate, leaflets usually dimorphic, lower broadly obovate to narrowly oblanceolate, upper linear to oblanceolate, conduplicate. Flowers multi-coloured, lemon-yellow and russet.
Calyx 7–8 mm long, silky hairy; upper lip 5–6 mm long, 2-lobed to below the middle; lower lip 6–6.5 mm long, 3-toothed, the teeth 2–2.5 mm long, acuminate.
Stamens 5–6 mm long, united into a sheath split above; anthers glabrous, the long ones 0.8 mm long and the short ones 0.4 mm long.
Ovary densely silky hairy; style c. 3.5 mm long, arcuate, glabrous; stigma capitate and shortly penicillate.
Stems few-branched, erect or ascending, up to 60 cm high and 0.4–1.5 mm in diameter, angular, subglabrous.
Pod not seen, but from Harvey's description c. 5 cm long and 2 mm wide, straight or slightly curved.
Inflorescence terminal, pedunculate, racemose (1)2–9(12)-flowered.
A slender herb from a small tuberous rootstock.
