plant which became naturalised before AD 1500. (Preston, C.D., Pearman, D.A. & Dines, T.D. (2002)).
Source: Department for Environment, Food and Rural Affairs (2003) , Department for Environment, Food and Rural Affairs, London, UK.
Source URL: Review of Non-native Species Policy: Report of the working group.
Copyright: Crown copyright
Date of entry: 24/11/2006