Heracleum mantegazzianum Sommier & Levier (ITIS)
Giant hogweed, cartwheel-flower
Caucasus Mountains (Gucker 2009)
1917 (Gucker 2009)
Ornamental (Gucker 2009)
Produces toxic sap that can cause skin irritation and blindness (Gucker 2009)
Virginia Tech researchers who helped identify the dangerous Giant Hogweed plants in Clarke County, Virginia, want residents to stay on the lookout for the plant with toxic sap that can cause severe burns — but also stressed that the weeds are believed to have been planted intentionally decades ago and haven’t spread in the years since. Anyone who suspects they have found Giant Hogweed should take photos, check online to compare the plant to giant hogweed photos, and then contact a Virginia Cooperative Extension agent.
Distribution / Maps / Survey Status
Includes species listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import or transport between States without a permit.
Google. YouTube; University of Maryland Extension. Home and Garden Information Center.
The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Giant Hogweed.
Council or Task Force
Invasive Species Council of British Columbia (Canada).
See also: Publications for more resources
USDA. APHIS. PPQ. Center for Plant Health Science and Technology; California Department of Food and Agriculture.
New York Invasive Species Clearinghouse.
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
USDA. ARS. National Genetic Resources Program. GRIN-Global.
State and Local Government
Oregon Department of Agriculture.
Wisconsin Department of Natural Resources.
Pennsylvania Department of Conservation and Natural Resources.
See also: Invasive Plant Fact Sheets for plant species (trees, shrubs, vines, herbs and aquatic plants) that have impacted the state's natural lands
Virginia Tech; Virginia State University. Virginia Cooperative Extension.