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   Heracleum mantegazzianum herb
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    Heracleum lanatum


    The Washington State Department of Ecology (UNDATED) states that, "Except for size, it closely resembles cow parsnip, Heracleum lanatum, a plant native to Washington."
    Heracleum maximum


    United States native Heracleum maximum resembles H. mantegazzianum which rarely exceeds 2 meters in height, has a flower cluster only 20 to 30 centimeters wide and has leaves usually only up to 30 cm wide. It seeds are narrower at base and wider at tip, while H mantegazzium seeds are elliptic. The hairs on the underside of this leaf are soft, wavy, shiny, and are about 1 mm long (King County, Department of Natural Resources and Parks, 2007).

ISSG Landcare Research NBII IUCN University of Auckland