Acknowledgments. Funding for this project was provided by Plant Conservation Alliance and the Environmental Protection Agency, Environmental Response Team. The majority of the work on this paper was done by Jeanette Dorner (University of Washington). Thanks to Peggy Olwell (Bureau of Land Management, Plant Conservation Alliance), Sally Brown (US Department of Agriculture and University of Washington), and Scott Fredericks (US Environmental Protection Agency) for supporting the project. Gay Austin (USDA Forest Service), Jan Busco (The Arboretum at Flagstaff), Greg Eckert (National Park Service), Bonnie Harper-Lore (Federal Highway Administration), Denise Louie (National Park Service), and Peter Schaefer (Minnesota Department of Natural Resources) helped review the document and Olivia Kwong (Society for Ecological Restoration) provided final editing.