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Leaves 3-foliolate; leaflets 1.5–6 × 0.5–3 cm, elliptic to oblong-obovate, shortly and often sparsely hairy at least beneath; petiole shorter than the leaflets; stipules 1–3(4) mm long, linear-subulate.
Calyx 4.5–6 mm long, puberulous; lobes subulate or narrowly triangular-acuminate, shorter than the tube, reflexed.
Erect herb or short-lived shrub, 0.6–2 m tall; branches somewhat angular, ribbed, shortly hairy, glabrescent.
Racemes lax, 8–30-flowered; bracts 1–2 mm long, linear or subulate; bracteoles on the pedicel, smaller.
Pod subsessile, (12)16–22 × 7–8 mm, puberulous, ultimately glabrescent, up to 10–16-seeded.
Seeds 3 mm long, broadly oblique-cordiform, smooth, ochre or brown.
