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Common Hogweed, Heracleum sphondylium.
Extreme care should be exercised when removing these plants, and it must be stressed that contact with dead plant parts and with inanimate objects or pets that have been in contact with such plants is dangerous. The use of protective water-resistant clothing and protective goggles is therefore advisable when dealing with H. mantegazzianum, as is the simultaneous avoidance of exposure to sunlight.