Stems herbaceous, 1–2 ft. high, copiously and diffusely branched, the branches firm, slender, glabrous, terete. Stipules ovate-lanceolate, scariose, with a large acuminate spur. Leaves sessile, the rachis about an inch long; leaflets in 6–8 pairs, linear-oblong, 3–4 lines long, 1 line broad, the apex rounded, surfaces glabrous except a row of bristles on the edge and midrib beneath. Flowers in heads of 4–6 on glabrous erecto-patent peduncles an inch long from the axils of the leaves. Pedicels 2 lines long, glabrous. Bracteoles ovate, scarious, adpressed to the calyx. Calyx-lobes persistent, becoming 3/8– 1/2 in. long, scarious and marked with fine close longitudinal lines, the upper one entire, the lower sometimes 3-toothed. Corolla yellow, half as long again as the calyx when in flower. Pod included, glabrous, 2–4-jointed, papillose.
