Eutrochium dubium, also called coastal plain joe pye weed, is a North American flowering plant in the sunflower family. It is native to the eastern United States and Canada, primarily the Atlantic coastal plain from Georgia to Nova Scotia. Eutrochium dubium is a herbaceous perennial plant herb sometimes as much as 170 cm (68 inches or 5 2/3 feet) tall. Stems are sometimes purple, sometimes green with purple spots. The plant produces numerous flower heads in flat-topped arrays, each head has 4-10 dark purple (rarely pink or white) disc florets but no ray florets.