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Leaves 16–40-foliolate; leaflets 3–8 × 1–2.5 mm, linear to linear-oblong or oblanceolate, rounded and mucronulate at the apex, obliquely truncate at the base, glabrous; main nerve central; other venation rather obscure; petiole and rhachis together 1.5–3.5 cm long, with a line of bristly hairs beneath; petiolules 0.3 mm long; stipules 7–12 × 1–2.3 mm, narrowly lanceolate, acuminate, conspicuously appendaged on one side at the base, soon falling or sometimes ± persistent.
Inflorescences axillary, lax, several-flowered; peduncle 1–2 cm long; rhachis 3–13 cm long; pedicels 3–5.5 mm long, with tubercular-based hairs; bracts 2–3-fid, 4 × 1.6 mm, elliptic-lanceolate, glabrous, soon falling; bracteoles 2.5 × 0.6 mm, narrowly oblong-lanceolate, soon falling.
Fruit of 1 or less often 2 articles joined by a narrow neck; articles 7–11 × 6–8 mm, triangular with acute angles or rarely rounded, compressed, glabrous or puberulous on the thickened margins, reticulate but smooth or at length very finely rugulose.
Standard dark yellow, tinged brown outside, 7.5–10 × 3.5–4.5 mm, oblong but slightly narrowed at the middle, ± truncate; wings yellow; keel petals pale yellow, not laciniate.
Stems slender, at first glandular pubescent with tubercular-based hairs, later glabrous; bark on older stems at length peeling to reveal a powdery rusty-red surface.
Seeds chestnut-brown, 5 × 4 × 1.5 mm, irregularly compressed-reniform, slightly beaked beyond the small round eccentric hilum.
Calyx glabrous, 2-lipped; lips 5–7 × 2–3 mm, elliptic, one slightly emarginate, the other shortly 3-toothed or almost entire.
Small shrub 0.8–3 m tall or sometimes an ascending woody herb.
