Chris Evans, University of Illinois, Bugwood.org
poison-hemlock (Conium maculatum) stem(s) on ( )
Eric Coombs, Oregon Department of Agriculture, Bugwood.org
Ohio State Weed Lab , The Ohio State University, Bugwood.org
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Steve Dewey, Utah State University, Bugwood.org
Ohio State Weed Lab , The Ohio State University, Bugwood.org
Jan Samanek, Phytosanitary Administration, Bugwood.org
Robert Vidéki, Doronicum Kft., Bugwood.org
John Cardina, The Ohio State University, Bugwood.org
John Cardina, The Ohio State University, Bugwood.org
Robert Vidéki, Doronicum Kft., Bugwood.org
Ansel Oommen, Bugwood.org