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''Eutrochium'' is a North American genus of herbaceous flowering plants in the family
Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...
. They are commonly referred to as Joe-Pye weeds. They are native to the United States and Canada, and have non-dissected foliage and pigmented flowers. The genus includes all the purple-flowering North American species of the genus ''
Eupatorium ''Eupatorium'' is a genus of flowering plants in the family Asteraceae, containing from 36 to 60 species depending on the classification system. Most are herbaceous perennials growing to tall. A few are shrubs. The genus is native to temperate ...
'' as traditionally defined. ''Eupatorium'' has recently undergone some revision and has been broken up into smaller genera. (2000): Phylogeny and biogeography of ''Eupatorium'' (Asteraceae: Eupatorieae) based on nuclear ITS sequence data. '' Am. J. Bot.'' 87(5): 716-726.
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/ref> ''Eutrochium'' is the
senior synonym The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linnae ...
of ''Eupatoriadelphus''. ''Eupatorium'' in the revised sense (about 42 species of white-flowered plants from the
temperate In geography, the temperate climates of Earth occur in the middle latitudes (23.5° to 66.5° N/S of Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ranges throughout t ...
Northern hemisphere The Northern Hemisphere is the half of Earth that is north of the Equator. For other planets in the Solar System, north is defined as being in the same celestial hemisphere relative to the invariable plane of the solar system as Earth's Nort ...
) is apparently a close relative of ''Eutrochium''. Another difference between ''Eutrochium'' and ''Eupatorium'' is that the former has mostly whorled leaves and the latter mostly opposite ones. ''Eupatorium'' and ''Eutrochium'' are both placed in the subtribe Eupatoriinae, but South American plants which have sometimes been placed in that subtribe, such as '' Stomatanthes'', seem to belong elsewhere in the tribe
Eupatorieae Eupatorieae is a tribe of over 2000D.J.N.Hind & H.E.Robinson. 2007. Tribe Eupatorieae In: ''The Families and Genera of Vascular Plants'' vol.VIII. (Joachim W.Kadereit & Charles Jeffrey, volume editors. Klaus Kubitzky, general editor). Springer-Ve ...
. ;Species * ''
Eutrochium dubium ''Eutrochium dubium'', also called coastal plain joe pye weed, is a North American flowering plant in the family Asteraceae. It is native to the eastern United States and Canada, primarily the Atlantic coastal plain from Georgia to Nova Scotia. ...
'' (Willdenow ex Poiret) E. E. Lamont – coastal plain Joe-Pye weed * ''
Eutrochium fistulosum ''Eutrochium fistulosum'' (''Eupatorium fistulosum''), also called hollow Joe-Pye weed, trumpetweed, or purple thoroughwort, is a perennial North American flowering plant in the family Asteraceae. It is native to southern Canada and throughout ...
'' (Barratt) E. E. Lamont – hollow Joe-Pye weed * ''
Eutrochium maculatum ''Eutrochium maculatum'', the spotted joe-pyeweed, is a North American species of flowering plant in the family Asteraceae. It is widespread through much of the United States and Canada. It is the only species of the genus ''Eutrochium'' found ...
'' (Linnaeus) E. E. Lamont – spotted Joe-Pye weed * ''
Eutrochium purpureum ''Eutrochium purpureum'', commonly known as purple Joe-Pye weed or sweetscented joe pye weed, is an herbaceous perennial plant in the family Asteraceae. It is native to eastern and central North America, from Ontario east to New Hampshire and sou ...
'' (Linnaeus) E. E. Lamont – sweet Joe-Pye weed, green-stemmed Joe-Pye weed, queen of the meadow, gravel root, kidney root, purple boneset * ''
Eutrochium steelei ''Eutrochium steelei'', also known as Appalachian Joe-Pye weed or Steele's eupatorium, is a North American species of plants in the family Asteraceae. It is found only in the Appalachian Mountains of the eastern United States, in the States of Vi ...
'' (E. E. Lamont) E. E. Lamont


Medicinal

A peer-reviewed study suggests that Joe Pye of plant fame was a Mohican
sachem Sachems and sagamores are paramount chiefs among the Algonquians or other Native American tribes of northeastern North America, including the Iroquois. The two words are anglicizations of cognate terms (c. 1622) from different Eastern Al ...
named Schauquethqueat who lived in the mission town of Stockbridge, Massachusetts from 1740 to c. 1785 and who took as his Christian name, Joseph Pye. Other sources (although without citation) claim the plant was used to treat typhus outbreaks and the treatment of kidney stones and other urinary tract ailments. (2000). ''Appalachian Wildflowers''. Athens, Georgia: University of Georgia Press.


References

{{Taxonbar, from=Q1943382 Asteraceae genera Flora of North America Taxa named by Constantine Samuel Rafinesque