During surveys in 2006, the authors documented 13 invasive, exotic plant species and the native Eastern red cedar on Pea Ridge National Military Park. The survey focused on the relatively mature forests at the park to the exclusion of old fields and successional forests.

During surveys in 2006, the authors documented 35 invasive, exotic plant species on Wilson's Creek National Battlefield. Their findings are detailed in this report.

Prevention and early detection are the principal strategies for successful invasive exotic plant management. During surveys in 2006, the authors documented 16 invasive, exotic plant species on Tallgrass Prairie National Preserve. their findings and recommendations are detailed.