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

Leaves can be extremely variable, from egg-shaped to near lanceolate

Juan Campá, MGAP, Bugwood.org

Robert Vidéki, Doronicum Kft., Bugwood.org

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

John M. Randall, The Nature Conservancy, Bugwood.org

Vern Wilkins, Indiana University, Bugwood.org