Eutrochium is a North American genus of herbaceous flowering plants in the family Asteraceae.

[5][a] Unaware of this,[5] research botanists Robert M. King and Harold Robinson proposed assigning them to a new genus Eupatoriadelphus in 1970.

[5] Eupatorium in the revised sense (about 42 species of white-flowered plants from the temperate Northern hemisphere) is apparently a close relative of Eutrochium.

[4] All of the Joe Pye weed species except E. steelei are widely cultivated as ornamental landscape plants.

[18] Sources (although without citation) claim the plant was used to treat typhus outbreaks[19] and for the treatment of kidney stones and other urinary tract ailments.