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Acorus calamus (also called sweet flag or calamus, among many common names is a tall perennial wetland monocot of the Acoraceae family, in the genus Acorus. In spite of common names that include the words "rush" and "sedge," it is neither a rush nor sedge. 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.
