Giant Hogweed (Heracleum mantegazzianum) is one of New York's most striking and dangerous invasive plants. These resources can help you to identify and avoid Giant Hogweed, and other poisonous invasives that look like it.
Giant Hogweed (Heracleum mantegazzianum) - Poisonous Invader of the Northeast. This section of the Cornell Cooperative Extension Invasive Species Program website describes the history and distribution of Giant Hogweed in New York State, its biology and habitat, health and ecological impacts, control measures, and additional references. Also included are photo comparisons to help you distinguish Giant Hogweed from Cow Parsnip, Angelica, Poison Hemlock and Wild Parsnip. NYSG Invasive Species Factsheet Series: 07-1 by Charles R. O'Neill, Jr., Invasive Species Specialist, New York Sea Grant. February 2007, Revised August 2009.
Giant Hogweed, New York State Dept. of Environmental Conservation Fact Sheet. Includes a statewide distribution map, how to report the presence of Giant Hogweed to the DEC, an identification key, and control methods.
Banner photo courtesy of Terry English, USDA APHIS PPQ @ www.forestryimages.org.