Amur maple (Acer ginnala): an emerging invasive plant in North America

Acer ginnala Maxim. (Amur maple) is a growing threat to woodland systems in North America. Despite this, Amur maple has been largely ignored by ecologists, and scientific understanding of the species is mostly limited to anecdotal evidence from land managers. We evaluated the cover and richness of native and exotic understory plant communities under Amur maple canopies, native tree canopies, and nearby open areas near St. Paul, Minnesota, USA....