This one was on the Donaldson Run trail just after it enters the GWMP. I did not treat it. The specific location is below the concrete dam, then below a giant root ball from a downed tree, then just below a second root ball. I also found one along the Potomac Heritage Trail and pulled that one
Right along Appalachian Trail-pulled and bagged for later drying and disposal.
Tree of Heaven - Ailanthus altissima - Persistent Samaras
Thornapple - Datura stramonium