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Leaves 3-foliolate; leaflets 2–13 × 0.6–7 cm, elliptic or elliptic-oblong to lanceolate, acute to rounded at the apex, rounded to truncate or slightly subcordate at the base, margins entire or somewhat undulate, with sparse to dense longer hairs on the nerves and a mixture of very short and rather longer hairs between on upper surface, densely pilose beneath, the hairs on the nerves being mostly more ferruginous; venation strongly raised and reticulate beneath; petiole absent or not exceeding 5 mm; rhachis 1–4 cm long; petiolules 1 mm long; stipules 5–10 × 1.2 mm, lanceolate, densely pubescent outside, eventually deciduous.
Inflorescences terminal, branched, 25–65 cm long, with same indumentum as the stem; peduncle 20–46 cm long; pedicels 2.5–4 mm long, uncinulate-pubescent; primary bracts 3 × 0.8 mm, lanceolate, soon deciduous, each subtending 3 or more pedicels; secondary bracts about half the size, 1–2 × 0.5 mm, deciduous.
Fruits 9–22 mm long, of 1–3 articles, each article 7–8 × 6 mm, broadly elliptic, densely uncinulate-pubescent, with rather obscurely raised venation, necks between articles 1.5 mm long.
Calyx with longer bristly hairs and short uncinulate pubescence; tube 1.5 mm long; lobes 2–3 mm long, ovate-triangular to lanceolate, the upper two joined to form a very rounded lobe.
Seeds orange-brown, strongly compressed so that edge is almost keeled, 4.2–5 × 2.5–3 × 1.3 mm, reniform; hilum small, almost central, the seed margin raised to one side of it.
Standard pink or rose-pink, rarely white or purplish, 8–9 × 6–7 mm, almost round, wings brighter rose-pink.
Stems angular, densely shortly bristly hairy on the angles and uncinulate-pubescent between them.
Erect or suberect subshrubby perennial herb 0.6–2 m tall.
