Ageratina Altissima, also known as white snakeroot, is a flowering plant native to eastern and central North America. It is a highly toxic plant that is often mistaken for other non-toxic plants in the same family. The plant has been known to cause milk sickness in cattle that have consumed its leaves or stems. However, despite its toxicity, white snakeroot has medicinal properties that have been used in traditional medicine to treat fever, kidney stones, and various other ailments. Synonyms for Ageratina Altissima include: Eupatorium rugosum, Ageratum macrophyllum, snakeroot, richweed, boneset, and mistflower. The plant is also referred to as ageratum and agueweed.