A tall North American perennial plant of the daisy family that bears clusters of small purple flowers.
Genus Eupatorium, family Compositae, several species, in particular sweet joe-pye weedE. purpureum and spotted joe-pye weedE. maculatum‘Others are swamp blue aster, a pink turtlehead, speckled joe-pye weed, great lobelia, Pennsylvania buttercup, and several kinds of sedges.’‘Plants at Holliday Park that are usually confined to fens are swamp blue aster, speckled joe-pye weed, and a rather rare species of pink turtlehead.’
Early 19th century of unknown origin.