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Leaves often fasciculate, 10–30(48)-foliolate; leaflets 2–12 × 0.5–3 mm, linear to linear-obovate, truncate to rounded and mucronate at the apex, obliquely rounded at the base, glabrous; main nerve ± central; petiole and rhachis together 0.6–7 cm long, somewhat pubescent; petiolules 0.3 mm long; stipules 3–9 × 1–2 mm, ovate-lanceolate, acuminate, not appendaged but ± subcordate, nervose, mostly deciduous.
Inflorescences axillary or terminal, numerous, often lax, several-flowered; rhachis 2–15 cm long, peduncle 2–10 mm long; pedicels 1–6 mm long, glabrous to sparsely puberulous; bracts 2–3 × 2–2.5 mm, 2-lobed, ovate, soon falling; bracteoles 2.5–3 × 1–1.5 mm, ovate.
Fruit of 1–2 articles joined by a very narrow neck, each article elliptic, rounded or semicircular, 5–9 × 4–6 mm, compressed or somewhat inflated, glabrous, reticulate and later finely to quite strongly rugulose, the tubercles sometimes arranged reticulately.
Standard yellow with brown or purple veins or pinkish, tinged purple, 5–13 × 3.5–6 mm, violin-shaped; wings pale yellow or orange; keel petals orange to very pale yellow, often veined with reddish-purple, not laciniate.
Stems puberulous with sometimes viscid tubercular-based hairs when young, later glabrous; epidermis at length peeling in thin pieces.
Seeds cream to reddish-brown, 3.6–5 × 2.6–3.5 × 1.8 mm, ovoid-reniform, compressed; hilum small round, eccentric.
Calyx 2-lipped; lips 3–7 × 2–4.5 mm, ovate or oblong, one emarginate, the other slightly 3-lobed.
Erect, branched shrub or herb 0.8–4.5 m tall.
Dark brown rather viscid branches
Yellow, purple-veined flowers
An undershrub, 2–10 ft. high
