Giant hogweed (Heracleum mantegazzianum) also known as giant cow parsley, hogsbane, or cartwheel-flower, is a plant in the carrot family. People who touch its sap may develop giant hogweed burns ...

Jenson, nine, was stung by a giant hogweed in Ryhope Park, Sunderland, while trying to fetch a football. Toxic sap from the weed, which grows near canals and rivers, can increase the sensitivity ...