Robert Vidéki, Doronicum Kft., Bugwood.org
Ohio State Weed Lab , The Ohio State University, Bugwood.org
Ohio State Weed Lab , The Ohio State University, Bugwood.org
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
John M. Randall, The Nature Conservancy, Bugwood.org
John M. Randall, The Nature Conservancy, Bugwood.org
John M. Randall, The Nature Conservancy, Bugwood.org
John M. Randall, The Nature Conservancy, Bugwood.org
Dave Powell, USDA Forest Service (retired), Bugwood.org
Bruce Ackley, The Ohio State University, Bugwood.org