Calamus

(Sweet flag) A grass like plant used medicinally for flatulent colic, gastritis, dyspepsia as well as a brain rejuvenator, thought to improve memory and intellect. This is the North American variety which lacks the carcinogen, cis-isoasarone, found in European varieties. Root powder is valuable as a fixative in potpourris. Esteemed in India as a vermifuge and insecticide, especially for fleas. Plant seed in late fall to allow for seed stratification over the winter. Plant in moist, rich boggy soils. Spreads through underground rhizomes without the risk of becoming invasive.