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You are here: Home / Plants / Species Profiles / Giant Hogweed
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Species Profiles

Giant Hogweed

Giant HogweedScientific name: Heracleum mantegazzianum Sommier & Levier

Common names: Giant hogweed, cartwheel-flower

Click image to enlarge

Native To: Caucasus Mountains and southwest Asia (University of Connecticut 2009)

Date of U.S. Introduction: 1917 (University of Connecticut 2009)

Images: Invasive.org and Google

Video: Heracleum mantegazzianum, the Sequel (May 2009)(or click Play button below)
Video by John Robertson, Warden of The Poison Garden site.

Means of Introduction: Ornamental (University of Connecticut 2009)

Impact: Crowds out native species; produces toxic sap that can cause skin irritation and blindness (University of Connecticut 2009)

Current U.S. Distribution:

U.S. States and U.S. National Parks Where Reported Invasive: Invasive Plant Atlas of the United States map

Federally Regulated: Listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import, export, or transport between States without a permit (USDA, APHIS - Noxious Weeds Program)

Management Plans: Plants / Giant Hogweed

Selected Internet Resources:

Federal Government

Heracleum mantegazzianum
Integrated Taxonomic Information System.
Taxonomy

Heracleum mantegazzianum Sommier & Levier (Giant Hogweed) - Aquatic Plant Information System (APIS)
DOD. USACE. Engineer Research and Development Center. Environmental Laboratory.
Identification/Description; Introduction History; Impacts; Habitat; Distribution; Dispersion; Controls

Heracleum mantegazzianum Article Citation Search - AGRICOLA Database
USDA. National Agricultural Library.
Research; Special Note: NAL Catalog Search (resources)

Heracleum mantegazzianum - Germplasm Resources Information Network (GRIN)
USDA. ARS. National Genetic Resources Program.
Taxonomy; Legal Aspects

Giant Hogweed: A Federal Noxious Weed (Apr 2012; PDF | 3.08 MB)
USDA. APHIS. Plant Protection and Quarantine.
Identification/Description; Photographs; Impacts; Habitat; Controls

Giant Hogweed - Weed of the Week (Jun 20, 2005; PDF | 160 KB)
USDA. FS. Northeastern Area. Forest Health Protection.
Identification/Description; Photographs; Introduction History; Impacts; Habitat; Distribution; Controls

Giant Hogweed - Conservation Practice Job Sheet VT-315 (PDF | 125 KB)
USDA. Natural Resources Conservation Service.
Identification/Description; Photographs; Introduction History; Impacts; Controls

Plant Profile for Heracleum mantegazzianum - PLANTS Database
USDA. NRCS. National Plant Data Center.
Taxonomy; Distribution; Legal Aspects

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State Government

Giant Hogweed: Do Not Touch This Plant!
New York Department of Environmental Conservation.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Dispersion

Giant Hogweed
Oregon Department of Agriculture. Noxious Weed Control Program.
Identification/Description; Photographs; Impacts

Giant Hogweed
Pennsylvania Department of Agriculture. Plant Industry.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Distribution; Legal Aspects

Giant Hogweed
Pennsylvania Department of Conservation and Natural Resources. Invasive Exotic Plant Tutorial for Natural Lands Managers.
Identification/Description; Photographs; Introduction History; Impacts; Habitat; Special Note: Species Management and Control Information

Class A Noxious Weed: Giant Hogweed
Washington State Noxious Weed Control Board.
Taxonomy; Identification/Description; Photographs; Impacts; Habitat; Distribution; Dispersion; Controls; Legal Aspects

Best Management Practices: Giant Hogweed (PDF | 490 KB)
King County (Washington). Noxious Weed Control Program.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls; Legal Aspects

Giant Hogweed (Heracleum mantegazzianum)
Wisconsin Department of Natural Resources.
Identification/Distribution; Photographs; Introduction History; Impacts; Habitat; Distribution; Control; Special Note: Scientific review and assessment (PDF | 65 KB)

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University/Academic

Giant Hogweed - Invasive Plant Species of Alaska (PDF | 235 KB)
University of Alaska - Anchorage. Alaska Natural Heritage Program.
Identification/Description; Photographs; Impacts; Habitat; Controls

Heracleum mantegazzianum (Giant hogweed, Giant cow parsnip) - Invasive Plant Atlas of New England (IPANE)
University of Connecticut. Ecology and Evolutionary Biology.
Taxonomy; Identification/Description; Photographs; Introduction History; Distribution; Dispersion; Controls

Giant Hogweed - Invasive Plant Atlas of the United States
University of Georgia. Center for Invasive Species and Ecosystem Health.
Taxonomy; Identification/Description; Photographs; Introduction History; Distribution

The Infamous Giant Hogweed (Oct 2004; PDF | 450 KB)
Purdue University Extension. Weed Science.
Identification/Description; Photographs; Introduction History; Impacts; Controls

Giant Hogweed - MSU Extension Bullein E-2935 (Jun 2012; PDF | 3.03 MB)
Michigan State University. Extension.
Identification/Description; Photographs; Impacts; Distribution; Controls; Legal Aspects

Giant Hogweed (Heracleum mantegazzianum) - Poisonous Invader of the Northeast (Aug 2009; PDF | 888 KB)
SUNY College at Brockport. New York Sea Grant.
Taxonomy; Identification/Description; Photographs; Introduction History; Impacts; Distribution; Controls

The Perils of Giant Hogweed - Gardening in Western Washington
Washington State University. Cooperative Extension.
Identification/Description; Introduction History; Impacts; Life Cycle; Controls

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International

Giant Hogweed - Field Guide to Noxious and Other Selected Weeds of British Columbia
British Columbia Ministry of Agriculture, Food, and Fisheries (Canada).
Identification/Description; Photographs

Heracleum mantegazzianum - Invasive Species Compendium
Centre for Agricultural Bioscience International (CABI).
Taxonomy; Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Distribution; Controls

Giant Hogweed Poisoning
Canadian Biodiversity Information Facility. Canadian Poisonous Plants Information System.
Taxonomy; Photographs; Distribution; Special Note: References

Heracleum mantegazzianum - Delivering Alien Invasive Species Inventories for Europe (Sep 2006; PDF | 222 KB)
European Commission. Sixth Framework Programme.
Taxonomy; Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls

Data Sheets on Invasive Pests: Heracleum mantegazzianum (PDF | 58 KB)
European and Mediterranean Plant Protection Organization.
Taxonomy; Identification/Description; Impacts; Distribution; Dispersion; Controls; Special Note: Bibliography

Giant Alien
Giant Alien (Europe).
Photographs; Distribution; Controls; Legal Aspects; Special Note: References

Heracleum mantegazzianum - Invasive Alien Species Fact Sheet (PDF | 590 KB)
North European and Baltic Network on Invasive Alien Species.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls

Giant Hogweed
Ontario Federation of Anglers and Hunters (Canada).
Identification/Description; Photographs; Impacts; Distribution

Heracleum mantegazzianum (herb) - ISSG Global Invasive Species Database
World Conservation Union. Invasive Species Specialist Group.
Taxonomy; Identification/Description; Impacts; Life Cycle; Habitat; Distribution; Controls

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Organizations

Giant Hogweed in Connecticut
Connecticut Invasive Plant Working Group.
Identification/Description; Photographs; Impacts; Distribution; Controls

Heracleum mantegazzianum
Discover Life.
Identification/Description; Photographs; Illustrations; Impacts; Life Cycle; Habitat; Distribution; Controls

Giant Hogweed
Massachusetts Introduced Pests Outreach Project.
Identification/Description; Photographs; Impacts; Habitat

Giant Hogweed - BioBullies (Western Pennsylvania)
Natural Biodiversity.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Controls

Heracleum mantegazzianum
Texasinvasives.org.
Taxonomy; Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls; Special Note: References

Citations

University of Connecticut. 2009. Giant hogweed. Invasive Plant Atlas of New England (IPANE).

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Last Modified: Apr 17, 2014
 
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