Heracleum mantegazzianum (Giant Hogweed)

Giant hogweed (Heracleum mantegazzianum Sommier & Levier) is on the federal noxious weed list making it unlawful to propagate, sell, or transport. It has the ability to displace native plants in wetmesic, sunny habitats. It is also a significant human health hazard.

Hogweed Fact Sheet, Best Practices Manual, Similar species comparison chart.