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Leaves 40–86-foliolate; leaflets 6–22 × 1–4.5 mm, linear to oblong, rounded to emarginate and mucronulate at the apex, obliquely emarginate at the base, entire or finely serrate, glabrous but with ciliolate margins; venation sometimes obvious and purplish beneath; petiole and rhachis together 4–19 cm long, hairy like the branches; petiolules 0.5 mm long; stipules 7–20 × 1.5–3 mm, ovate-lanceolate, straight, spurred, glabrous or hairy, eventually deciduous.
Fruit 5–11 cm long excluding the 2 cm stipe, linear, straight or slightly curved, 6–12-jointed, glabrous or sparsely hairy, the margins slightly thickened, ± straight or slightly constricted between the joints; articles 8–12 × 7–10 mm, oblong, compressed, at first venulose, later often with the central part ornamented with spine-like tubercles up to 1 mm long, but mostly quite smooth.
Standard deep yellow to orange-yellow or sometimes brownish-purple, 1.8–3.3 cm long and wide, round, pubescent above outside; wings deep yellow to orange-yellow; keel petals yellow or brownish, laciniate along their lower margins, hairy.
Inflorescences axillary, (1)2–8-flowered; peduncle 3 cm long, glabrous or pubescent; rhachis 6 cm long; pedicels 8–16(22) mm long; bracts 4–7 × 2–3.5 mm, ovate; bracteoles 4–6 × 2–4 mm, ovate, ciliate.
Shrub or herb forming a dense coppice-like growth 0.9–3(6) m tall, with immersed procumbent rooting stems covered with prominent lenticels and erect branches.
Seeds purplish-brown or pale chestnut-brown, shiny, up to 7 × 3.5 × 1.8 mm, narrowly oblong-reniform, curved and canoe-shaped at one end; hilum linear-oblong.
Calyx pubescent or hairy, 2-lipped; lips oblong, unequal, one 8–12 × 5–8 mm, emarginate, the other 11–16 × 6–8 mm, 3-lobed.
Branches thick and soft at the base, glabrous to densely covered with sticky tubercular-based golden-brown hairs.
Branches and peduncles at first setose, becoming glabrous
A soft-stemmed undershrub
Flower conspicuous.
