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Leaves (12)16–34-foliolate; leaflets 2–14(17) × 1–3.5 mm, oblong to oblong-lanceolate, obtuse and mucronulate at the apex, oblique at the base, glabrous save for sparse glandular hairs on the main nerve beneath; basal nerves 2–3, the main one submarginal; petiole and rhachis together 1.3–7.5 cm long; petiolules 0.5 mm long; stipules 4–7 × 1–3 mm, lanceolate, acute, scarious, glandular-ciliate, ± deciduous.
Inflorescences axillary, often curved, dense, strobilate; peduncle 5–15 mm long; rhachis 1–7 cm long; pedicels 5–7 mm long; bracts free, 2–6 × 1–3 mm, falcate-lanceolate or ovate, acute, asymmetric at the base, pubescent; bracteoles free, 2–6(7) × 0.7–2 mm, elliptic to elliptic-lanceolate, pubescent.
Standard white, pale lilac or bluish-violet, often veined mauve, 8–12 × 4–9 mm, rounded, emarginate, glabrous save for a few hairs on the central nerve; claw conspicuous, wings white; keel white or bluish-violet.
Calyx pubescent, 4–8 mm long, 2-lipped; lips elliptic or oblong, the upper deeply emarginate, the lower deeply divided into 3 rounded or acute ovate lobes.
Stems sticky and glandular, densely covered with bristly tubercular-based hairs.
Fruit of 1–2 articles; articles 2–2.5 mm long and wide, semicircular, glabrous.
Erect, rarely decumbent, aromatic shrub (0.15)0.5–3 m tall.
Seeds dark brown, 2 × 1.7 × 1.2 mm, oblong-rounded.
