Troy Evans, Great Smoky Mountains National Park, Bugwood.org

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

Robert Vidéki, Doronicum Kft., Bugwood.org

Graves Lovell, Alabama Department of Conservation and Natural Resources, Bugwood.org

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

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

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

USDA NRCS PLANTS Database , Bugwood.org