This indicator deals with plants that are invasive to the area of interest. These plants may or may not be noxious and may or may not be exotic. Generally they are invaders or increasers to the site that can, and often do, continue to increase regardless of the management of the site and may eventually dominate the site. Invasives can include noxious plants (i.e., plants that are listed by a state because of their unfavorable economic or ecological impacts), non-native, and native plants.