Heracleum mantegazzianum is a herbaceous biennial or monocarpic perennial native to Russia and Georgia (Caucasus). It has spread rapidly in a number of European countries after introduction as an ornamental plant. The species is a prolific seed producer and its vigorous growth leads to changes in vegetation. It causes dermatitis when it is handled in bright sunlight. It invades a variety of habitat types, especially roadsides but also river banks, railway tracks, woodland edges, and ruderal sites such as rubbish dumps and waste ground.
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