FLORA OF ICELAND elements: Heracleum persicum, Persian Hogweed, Tröllakló

Heracleum persicum; The Persian hogweed is very similar to the Giant Hogweed (Heracleum mantegazzianum). It differs in:
  - It is a perennial species where H. mantegazzianum is a bi-annual.
  - It has flower umbels spaced well below the large top umbels. These are from lower placed lateral stems.
  - Iit lacks the red spots on the stems.

  - It grows around human settlements on dry disturbed soils. Like H. mantegazzanium it is a settled introduced exotic on Iceland.
  - It is a member of the Carrot family ( Apiaceae formerly known as Umbelliferae). The Icelandic name of this species is Tröllakló.