Flore du Québec, Fleur de Lys
Flore du Québec sur Facebook Flore du Québec sur Pinterest
Distribution and localisation map 

Giant hogweed

Heracleum mantegazzianum

Berce du Caucase

  • Presentation
  • Presentation
  • Identification
  • Names
  • Uses
Public plant-enemy number one for ten years now, the Giant Hogweed continues to spread in Quebec.
Introduced in North America in the early twentieth century as an ornamental plant because its size makes it spectacular, it has become invasive.
Its sap contains a phototoxic substance (which is active to light) and can cause skin lesions similar to burns and even blindness if eye contact.
Do not touch!
To signal the presence of the plant, contact the municipality concerned or with the ministère du Développement durable, de l’Environnement et des Parcs at 1 800 561-1616.
Take a picture of the plant to confirm your observation.

Giant hogweed (Heracleum mantegazzianum)
Giant hogweed : 1- Flowering plant
Giant hogweed : 2- Inflorescence (main umbel)
Giant hogweed : 3- Stalk
Giant hogweed : 4- Main umbel (details)
Giant hogweed : 5- Leaf
Giant hogweed : 6- Flowering plant
Giant hogweed : 7- Inflorescence
Photos of  Heracleum mantegazzianum