Acorus calamus Linn. (Family: Acoraceae) is a native of India, Asia and has now been introduced across Europe, Australia, New Guinea, South Africa, Reunin and North America. Sweet flag, A. calamus L., a member of the family of Araceae, is a perennial plant native to East Indies. It grows wild in the temperate zones of Europe, North America and East Asia, along swamps, brooks, lakes, etc. In Lithuania, it grows spontaneously and is widespread all over the country. The scented leaves and more strongly scented rhizomes have traditionally been used medicinally and to make fragrances, and the dried and powdered rhizome has been used as a substitute for ginger, cinnamon and nutmeg.