This stuff had me worried until I realized that poison sumac doesn't have the winged rachis (axis between the leaflets) I figured it must be Rhus copallinum, also known as Winged Sumac, Shiny Sumac, Flameleaf Sumac, and Dwarf Sumac. I certainly hope you agree. You have my permission to use these. They were taken June 17th in Jacksonville, NC - my back yard is full of these.