Common Name: eastern Joe-pye weedScientific Name: Eupatorium dubium Willd. ex Poiret syn. Eupatoriadelphus dubius, Eutrochium dubiumFamily Name: Asteraceae (Compositae) - Aster or Sunflower FamilyIdentification NotesLife Cyclenative perennial, reproducing by seed Stemsupright, stout, tall, unbranched, purple spotted or tinged, solid or partially hollow, rough pubescence Leaveswhorled 3-4 (5) per nodes, ovate narrow or broad, strongly 3-veined, margins toothed Flowersheads of purple disk (tubulate) florets, 6-9 florets per head; terminal cluster, round topped becoming cylindrical