Stems minutely appressed pubescent, up to 40 cm. tall from a woody perennial rootstock.. Leaf-rhachis up to 7 cm. long, including a petiole of up to 13 mm., not or hardly prolonged beyond lateral leaflets; stipules narrowly oblong-attenuate, up to 5 mm. long; leaflets 5–15, thickened at the margins, narrowly linear-lanceolate or oblanceolate, pointed and recurved at the tip, up to 5 cm. long by 5 mm. wide, glabrous above, appressed strigulose beneath; veins very dense and prominent above and beneath, uniting to make a fairly strong marginal vein; terminal leaflets usually smaller than those near middle of leaf.. Flowers purple, up to 6 per node, in short terminal or axillary pseudoracemes, also in upper leaf-axils; bracts lanceolate, caducous; pedicels up to 10 mm. long.. Calyx reddish-brown, appressed silky; teeth triangular, acuminate, upper pair over half united, ± 2.5 mm. long, lateral 2.5 mm., lowest ± 3 mm. long.. Standard golden-brown silky outside, ±16 mm. long by 17 mm. wide but variable in size; keel glabrous.. Upper filament lightly attached, a large callous swelling 1 mm. above the base; filament-sheath ± 9 mm., free parts 2–3 mm., anthers 1 mm. long.. Style sharply bent through 110° 2 mm. above the base, linear, tapering near the apex, 7 mm. long, pubescent on both sides.. Pod ± 4 cm. long by 5–6 mm. wide, with short white appressed hairs, ascending; style-base straight.. Seeds (immature) 4–7.
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