Cosmopolitan weed, is found in all tropical, subtropical and temperate regions of the world. In India, it is commonly known as Nagarmotha and it belongs to the family Cyperacea. The major chemical components of this herb are essential oils, flavonoids, terpenoids, sesquiterpenes, cyprotene, cyperene, aselinene, rotundene, valencene, cyperol, gurjunene, trans-calamenene, cadalene, cyperotundone, mustakone, isocyperol, acyperone, etc.,
Research studies have shown that it possesses various pharmacological activities. It is commonly used for relaxation in Ayurveda.