Jil Swearingen, USDI National Park Service, Bugwood.org

Charles T. Bryson, USDA Agricultural Research Service, Bugwood.org

Chris Evans, University of Illinois, Bugwood.org

Chris Evans, University of Illinois, Bugwood.org

Chris Evans, University of Illinois, Bugwood.org

Chris Evans, University of Illinois, Bugwood.org

Ohio State Weed Lab , The Ohio State University, Bugwood.org

Joseph M. DiTomaso, University of California - Davis, Bugwood.org

Bruce Ackley, The Ohio State University, Bugwood.org

Bruce Ackley, The Ohio State University, Bugwood.org

Bruce Ackley, The Ohio State University, Bugwood.org