Invasive Plant Species of the World: A Reference Guide to Environmental Weeds (2nd edition) Available to Purchase

Since the first edition in 2003, 50 plants have been added to the list and 19 have been judged not to be harmful. So the book now has about 500 entries. To be included in this book a plant has to be both alien and invasive. The plants are mainly flowering plants but there are some coniferous trees and two ferns. There are some surprises. Utricularia gibba is a carnivorous plant, and these are usually considered at risk. This one is widely distributed but is an invasive alien in New Zealand where it threatens the native carnivorous plants. Another is...