Acorus calamus, commonly known as sweet flag, is a perennial wetland plant native to parts of Asia, Europe, and North America. It typically grows in marshy areas, along riverbanks, and in shallow waters. The plant features long, sword-like leaves and produces small, greenish-yellow flowers that bloom in spikes. The rhizome of Acorus calamus has been used in traditional medicine for its potential health benefits, including digestive support and anti-inflammatory properties. Additionally, it is often used in perfumery and as a flavoring agent in some culinary dishes.