Eutrochium maculatum
（重定向自Eupatorium maculatum）
Eutrochium maculatum (spotted Joe-Pye weed) is a North American species of flowering plants in the sunflower family. It is widespread through much of the United States and Canada. It is the only species of the genus found west of the Great Plains.
Eutrochium maculatum is an herbaceous perennial sometimes growing as high as 2 m (6 ft 7 in). Stems are sometimes completely purple, sometimes green with purple spots. One plant can produce numerous rose-purple flower heads in late summer, each head with 8-22 disc flowers but no ray flowers. The binomial name maculatum, meaning spotted, refers to the purple spots on the stem.