Eric Coombs, Oregon Department of Agriculture, Bugwood.org

Faith Duncan, USDA Forest Service, Bugwood.org

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

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

Michael Shephard, USDA Forest Service, Bugwood.org

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

USDA NRCS PLANTS Database , Bugwood.org

Eric Coombs, Oregon Department of Agriculture, Bugwood.org

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

Eric Coombs, Oregon Department of Agriculture, Bugwood.org