It is an annual, twining herb with long cylindrical branches. Leaves alternate, 3-foliate; leaflets ovate or rhomboid, membranous and glabrescent above. Flowerspurplish, solitary or 2-3 together on axillary racemes. Pods 4-6 seeded, turgid,falcately curved on both ends, densely clothed with persistent pale brown or steel grey,irritant bristles. Seeds ovoid, compressed, smooth, brownish with large, oblong hilum.(India)