bioblitz-S295-2019 Giant Hogweed (Heracleum Mantegazzianum)

bioblitz-S295-2019 Giant Hogweed (Heracleum Mantegazzianum)

Observation - bioblitz-S295-2019 Giant Hogweed (Heracleum Mantegazzianum) - UK and Ireland. Description: Heracleum Mantegazzianum also known as Giant hogweed or Hogsbane is a close relative of cow parsley

Heracleum Mantegazzianum also known as Giant hogweed or Hogsbane is a close relative of cow parsley originally from Southern Russia and Georgia. It can reach over 3m (10ft) in height (https://www.rhs.org.uk/advice/profile?PID=458).
The sap of Giant Hogweed contains toxic chemicals known as furanocoumarins. When these come into contact with the skin, and in the presence of sunlight, they cause a condition called phytophotodermatitis: a reddening of the skin, often followed by severe burns and blistering. The burns can last for several months and even once they have died down the skin can remain sensitive to light for many years (http://www.nonnativespecies.org/?pageid=152).