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Fruit stipitate, 3–5.5 cm long (excluding stipe), linear, straight or slightly curved, 4–9-jointed, the suture somewhat constricted between the articles; articles 4–5.5 mm long and wide, oblong, mostly compressed, sparsely pilose, a central oblong-elliptic part slightly thickened, densely and finely tuberculate when adult or sometimes this area inflated and longitudinally crested.
Leaves sensitive, 18–56-foliolate; leaflets 3–16 × 1–2.5 mm, linear-oblong, rounded at the apex, obliquely rounded at the base, finely serrulate, ± ciliate but otherwise glabrous; reticulation scarcely evident; petiole and rhachis together 2.5–8 cm long, hairy like the stems; petiolules 0.5 mm long; stipules straight, spurred, 3–8 × 1–2 mm, ovate-lanceolate, finally deciduous.
Flowers solitary or ternate, axillary; pedicels 5–10(27) mm long, pubescent with tubercular-based hairs; bracts absent; bracteoles 3–4 × l.5 mm, ovate, acuminate, ciliate.
Standard white to yellow, sometimes with dark veins, 6–22 × 4–18 mm, obovate, emarginate; keel petals paler greenish-yellow with margins partly laciniate.
Seeds chestnut-brown, shiny, compressed, 3.5 × 2.2 × 1.2 mm, oblong-reniform, the end nearest the eccentric hilum somewhat canoe-shaped.
Calyx with tubercular-based hairs, 2-lipped; lips 6–7(12) × 2.5–4 mm, one wider than the other.
Erect shrubby herb, often an annual, 0.5–2(?4.5) m tall.
An undershrub with half-woody bristly branches
Stems covered with tubercular-based hairs.
Small bright yellow flowers.
