Rough Mexican Clover is an annual herb, native to the American continent, but widely naturalized in tropical world. The root is a taproot and the stem is branched, erect, fleshy, very hairy and 20-50 cms tall. The leaves are also velvety and stalkless, oppositely aranged, entire, oblong or elliptical to lancelike or ovate, 2-4 cm long and 1-1.5 centimeters wide. The inflorescence is a white flower-head subtended by four leaf bracts, two longer than the others. The flowers are perfect, have 5 white petals, and occur in terminal clusters. The calyx is a small whorl consisting of 5 to 6 pointed lobes. The fruit is a capsule divided into 3 to 4 parts and produces flat, obovate seeds.