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Leaves mostly fasciculate, 20–40-foliolate; leaflets 3–4 × 0.5–1 mm, lanceolate or linear-oblong, acute or obtuse and mucronulate at the apex, obliquely rounded at the base, rather thick, imbricated, glabrous or pubescent but mostly glandular-ciliate; main nerve eccentric but not marginal, other venation obscure or prominent; petiole and rhachis together 5–20 mm long; petiolules minute; stipules 4.5 × 1 mm, lanceolate, acute, shortly appendaged, striate, soon falling or persistent.
Inflorescences axillary, short, often occurring over considerable lengths of shoots and giving a characteristic appearance to the plant; peduncle 0–5 mm long; rhachis 1–5 cm long; pedicels 3–5 mm long; bracts 2-fid, 4–4.5 × 1.2–2 mm, ovate-lanceolate or ovate, acute, striate, pubescent, soon falling; bracteoles 3–5 × 1.2–1.5 mm, ovate to lanceolate, pubescent, soon falling.
Fruit of 1 or 2 articles joined by a narrow neck; articles 6.5–9.5 × 5–6 mm, semicircular, the upper edge almost straight, lower edge strongly curved, margined, compressed, entirely glabrous or pubescent or puberulous, at least on the margins, somewhat venose, sometimes minutely verrucose.
Standard yellow with purple lines outside or all yellow, 9–12 × 5–6 mm, obovate-oblong; wings yellow; keel greenish-yellow, not laciniate.
Stems at first pubescent, glabrescent or setulose-hairy, but bark soon breaking down to form a distinctive reddish-brown powdery coating.
Calyx pubescent or glabrescent, 2-lipped; lips 6.5–9(10) × 3.5–4 mm, oblong, one slightly emarginate, the other slightly 3-fid.
Seeds reddish-brown, 4 × 3 × 1.5 mm, reniform, compressed; hilum small, round, eccentric.
Erect irregularly branched shrub or small tree 1–4.5(5) m tall.
