Heracleum mantegazzianum (giant hogweed)

• ODA “A” rank species (ODA ranking page)
• Portland 'Required Eradication' species

Giant hogweed is a striking, highly visible species capable of creating significant ecological damage. Native to south-central Russia, hogweed has been known as an invasive throughout Britain and Ireland for decades, and was the target of a sizable eradication effort in Seattle in the 1990s.