There are 21 major species of noxious weeds (invasive) on the Black Hills National Forest in western South Dakota and northeastern Wyoming.
DOI. National Park Service.
The National Park Service (NPS) has finalized a long-term strategy to reduce the impacts and threats from invasive plants and to restore native plant communities and historic landscapes for 15 national park areas in D.C., Maryland, Virginia and West Virginia. The Invasive Plant Management Plan will guide park staff in standardizing and streamlining their treatment of non-native invasive plants. The plan will also help the NPS identify areas with the most urgent needs in order to address the most immediate threats to park resources. Each of the 15 area parks will develop an annual non-native invasive plant treatment strategy that is based on science, is cost effective, and poses the least amount of risk to people and park resources.