Butterfly bush is an attractive plant but it has had a negative impact on regional ecology. Boersma (biology, U. of Washington) and UW colleagues introduce the nature and impact of alien species (plants, animals, and pathogens). Species accounts include a description, current range, impact on eco-communities and native species, control methods, species overview, invasiveness history, range map, and color photo. Additional features are a color map of Pacific NW areas, lists on the worst regional and global invasive species, study questions, resources, and a glossary. Lacks an index. Annotation ©2007 Book News, Inc., Portland, OR (booknews.com)