Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Acorus calamus, commonly known as sweet flag or calamus and various rushes and sedges, is a plant from the Acoraceae family, in the genus Acorus. It is a tall perennial wetland monocot with scented leaves and more strongly scented rhizomes, which have been used medicinally, for its odor, and as an allegedly psychotropic drug. Its Sanskrit name is vacha .Probably indigenous to India, Acorus calamus is now found across Europe, in southern Russia, northern Asia Minor, southern Siberia, China, Indonesia, Japan, Burma, Sri Lanka, Australia, as well as southern Canada and Northern USA (which are diploid Acorus americanus). Indigenous diploid plants in northern Asia may be part of A. americanus.

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