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Spotted Joe Pye Weed, Purple Boneset, Spotted Trumpetweed - Eutrochium maculatum


Family: Asteraceae - Aster family Genus Common Name: Joe Pye Weed Native Status: NativeDicot Perennial Herb Subshrub
Eutrochium maculatum - Spotted Joe Pye Weed, Purple Boneset, Spotted Trumpetweed. There are several species that go by the common name Joe Pye Weed. All of them were previously classified in the Eupatorium genus (Thoroughworts); Spotted Joe Pye Weed was Eupatorium maculatum. However, three of the species were relatively recently been reclassified into their own genus, Eupatoriadelphus, which has more recently been renamed Eutrochium and had two more species added. I'm sure there was good reason for this reclassification, but it certainly adds to the name confusion.

Spotted Joe Pye weed is the most widespread of the Eutrochium species, being found in 36 states (BONAP shows only 35.) (E. steelie is the least widespread, found only in 4 states.)

Found in:
AZ, CO, CT, GA, IA, ID, IL, IN, KS, KY, MA, MD, ME, MI, MN, MO, MT, NC, ND, NE, NH, NJ, NM, NY, OH, PA, RI, SD, TN, UT, VA, VT, WA, WI, WV, WY

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Eutrochium maculatum

Distribution of Eutrochium maculatum in the United States and Canada:
USDA Plants Distribution Map temporarily unavailable.
Blue=Native; Grey=Introduced

Map from USDA Plants Database:
USDA, NRCS. 2017. The PLANTS Database (http://plants.usda.gov, 18 Oct 2017). National Plant Data Team, Greensboro, NC 27401-4901 USA.

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Site: Boundary Waters Canoe Area Wilderness, Lake County, MN Date: 2012-September-06Photographer: Gerald C. Williamson
Nikon D7000
The inflorescence of Spotted Joe Pye Weed is made of many - perhaps hundreds - of pink to purple disk flowers.
Eutrochium maculatum

Site: Boundary Waters Canoe Area Wilderness, Lake County, MN Date: 2012-September-06Photographer: Gerald C Williamson
Nikon D7000
Spotted Joe Pye Weed leaves are in whorls of 3 to 6, most frequently 4. The stem is usually purplish, with darker purple spots on it.
Click on the photo for a larger image
Eutrochium maculatum

Site: Boundary Waters Canoe Area Wilderness, Lake County, MN Date: 2012-September-06Photographer: Gerald C Williamson
Nikon D7000
Eutrochium maculatum grows to over 6 feet tall. It flowers from late summer through fall. The frequently grow in moist areas such as this streambank.
Click on the photo for a larger image
Eutrochium maculatum

References used for identification and information:

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2017
Photographs Copyright owned by the named photographer