'Giant hogweed (Heracleum mantegazzianum) is a VERY LARGE, invasive plant that can cause painful burns and permanent scarring. Brushing against or breaking the plant releases sap that, combined with sunlight and moisture, can cause a severe burn within 24 to 48 hours. Giant hogweed is a Federally listed noxious weed and NYS law prohibits its possession with the intent to sell, import, purchase, transport, introduce or propagate.' -NYS Dept. of Environmental Conservation 

See Giant Hogweed that Jim took a short video of here.

You should NEVER touch Giant Hogweed if you see it.  To learn more about Giant Hogweed and it's dangers CLICK HERE.