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Leaves 28–104-foliolate; leaflets 3–22(55) × 0.7–7(17) mm, linear to oblong, obtuse or emarginate and mucronulate at the apex, obliquely rounded at the base, glabrous; main nerve ± central; petiole and rhachis 3–21(30) cm long, glabrous to hispidulous; petiolules 1 mm long; stipules 6–16 × 1–5 mm, ovate to linear-lanceolate, acuminate, slightly subcordate but not appendaged at the base, sometimes ciliolate.
Inflorescences terminal or from the upper axils, slightly to much branched, lax and many-flowered; peduncle 2.5–6 cm long; rhachis 3–45 cm long; pedicels 3–11 mm long, glabrous or pubescent; bracts 2.5–4 × 1.5–2.5 mm, oblong-elliptic, entire or 2–3-toothed, soon falling; bracteoles 2.5–3.5 × 1–1.5 mm, lanceolate to obovate, obtuse at the apex, glabrous, soon falling.
Standard yellow with purple veins, 8–12 × 4.5–7 mm, ovate or ovate-elliptic, emarginate; wings yellow with purple veins, about equalling the keel; keel petals yellow with purple veins, 8–15 mm long, not laciniate; filament-sheath usually as long as or longer than the 7–13 mm long fruit stipe.
Fruit of 1–3 articles joined by a very narrow neck consisting of practically nothing but the suture; articles 12–21 × 8–15 mm, semicircular, papery, glabrous or very sparsely pubescent, reticulate.
Erect subshrub or shrub 0.4–3 m tall, with several shoots from a woody rootstock with some roots tuberous, sometimes leafless when flowering; mostly appearing after burns.
Calyx glabrous, 2-lipped; lips 5.5–10 × 3–5 mm, ovate or oblong, often ciliolate, one emarginate, the other 3-lobed at the apex.
Seeds yellow-brown, 5.5 × 4.5 × 1.1 mm, irregularly compressed-reniform; hilum small, elliptic, eccentric.
Stems glabrous to densely viscid scabrid-pubescent or rarely stiffly spinulose with persistent hair-bases.
