(Eupatorium perfoliatum) Boneset is a perennial herb with a hairy stem typically 2 to 4 feet high. The leaves are large and united at the base The leaves serve to distinguish the species at the first glance. The flower-heads are terminal and numerous, large and slightly convex, with from ten to twenty white florets. It is nearly always found in low, wet areas and often found near Reed canary grass. Eupatorium perfoliatum is a specific Butterfly food and habitat plant. Boneset also has many medical uses and was a very common remedy in the United States in the 19th century.