Distribution:A weed of road sides and waste places.Native of tropics. 50-90cm tall glabrous annual, much branched herb. Stems and branches angular.Stipules foliaceous. Leaves 3-12x2-7cm, ovate-rhomboid, obtuse, tapering at the base, pubescent beneath. Flowers 1.5-2cm lon bluish -purple or white in 8-15cm long terminal racemes. Bracts and bracteoles minute. Pods 3-5cm long, cylindric.