Acorus Calamus, or more commonly know as Calamus, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) with green foliage and yellow flowers of the genus Acorus. It has a moderate growth rate and a height of 5 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during late spring and is intolerant of shade. Acorus Calamus or Calamus's floral region is North America US Lower 48 and Alaska, specifically in the states of Alabama, Arkansas, California, Colorado, Connecticut, Delaware, Georgia, Iowa, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, North Carolina, Nebraska, New Hampshire, New Jersey, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Virginia, Vermont, Washington and Wisconsin.
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