Common Name: Joe-Pye WeedScientific Name Genus: EupatoriumFamily Name: AsteraceaeIdentification NotesGrowth Habiterect, very tall 5 to 7 feet. Leaves8-12 inches lanceolate-shaped leaves in whorls on purplish stiff, hollow stems. Flowersvery large (12-18 inches across) clusters of purple flowers, looks something like a large dandelion flower. Varieties or Cultivars Landscape Usesbg; naturalized areas.