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Eastern Poison Ivy - Toxicodendron radicans


Family: Anacardiaceae - Cashew or Sumac family Genus Common Name: Poison Oak Native Status: NativeDicot Perennial Shrub Herb Subshrub Vine
Toxicodendron radicans - Eastern Poison Ivy. The eastern species of Poison Ivy, Toxicodendron radicans, is found throughout most of the eastern two-thirds of the US and in eastern Canada. It has much overlap with Western Poison Ivy, Toxicodendron rydbergii, especially in the northern climes. Poison Ivy is well-named, both for its climbing ivy-like vine, and the nature of its oils, to which most people have some degree of allergic reaction. This should be one of the first plants you teach your children to identify since it is so widespread and commonly found. It is classified as a Prohibited Noxious Weed in Minnesota.

Found in:
AL, AR, AZ, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, NE, NH, NJ, NY, OH, OK, PA, RI, SC, SD, TN, TX, VA, VT, WI, WV

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Toxicodendron radicans

Distribution of Toxicodendron radicans in the United States and Canada:
Map unavailable.
Map courtesy of The Biota of North America Program.
Map color key

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Site: The Pocket at Pigeon Mountain, Walker County, GA Date: 2009-July-18Photographer: Cindy Williamson
Nikon D40
The leaves of Poison Ivy can be an attractive red.
Toxicodendron radicans
Site: Pigeon Mountain, Walker County, GA Date: 2011-April-24Photographer: Gerald C Williamson
Nikon D7000
Poison Ivy flowers.
Click on the photo for a larger image
Toxicodendron radicans
Site: The Pocket at Pigeon Mountain, Walker County, GA Date: 2009-June-06Photographer: Gerald C Williamson
Nikon D60
"Leaves of 3, let it be."
Click on the photo for a larger image
Toxicodendron radicans
Site: Walker County, GA Date: 2010-May-24Photographer: Gerald C Williamson
The poison ivy vine gets quite hairy, especially as it ages.
Click on the photo for a larger image
Toxicodendron radicans
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Toxicodendron radicans initially published on USWildflowers.com 2012-07-26; Updated 2015-06-25

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2024
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Code Update 20230302