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Inflorescences dense, subumbellate, 8–15 mm long, up to 25 mm wide, above a peduncle 1–4 cm long; pedicels 2–5 mm long; bracts 4–5 × 1–2 mm, ovate-lanceolate, glabrous save for sparse cilia on the margins; bracteoles 2–4 × 2 mm, oblong or elliptic, glabrous or with a few hairs on the main nerve.
An annual herb or small shrub. It has erect stems. It grows up to 1.5 m high. The leaves are 5-7 cm long and have 6-9 pairs of leaflets. The flowers are in groups of 3-6. They have brown bracts. The flowers contain both sexes. The fruit is a pod with 1-4 joints.
Calyx densely to very sparsely covered with yellow bristles, striate, c. 7–9 mm long, somewhat accrescent in fruit and then c. 10–12 mm long; tube 2.5 mm long; upper lip bidentate, c. 5–6.5 mm wide; lower lip tridentate, 2–4 mm wide.
Corolla rose, mauve or blue; standard c. 10 × 4–8 mm, broadly obovate, glabrous.
Seeds dark brown, c. 1.5 mm across, 0.5 mm thick, rounded-reniform, compressed.
Fruit 4–7-jointed, each article c. 2–3 mm long and wide, tuberculate.
Decumbent herb, 0.4–1.8 m long.
Stems bristly to glabrescent.
