[syn: Joe-Pye weed, spotted Joe-Pye weed, Eupatorium maculatum]
The Collaborative International Dictionary of English v.0.48:
Joe-Pye weed \Joe`-Pye" weed`\ (Bot.)
   A tall composite plant of the genus Eupatorium (Eupatorium
   purpureum), with purplish flowers, and whorled leaves.
   [1913 Webster]
WordNet (r) 3.0 (2006):
Joe-Pye weed
    n 1: North American herb having whorled leaves and terminal
         clusters of flowers spotted with purple [syn: Joe-Pye
         weed, purple boneset, trumpet weed, marsh milkweed,
         Eupatorium purpureum]
    2: North American herb having whorled leaves and terminal
       clusters of small pinkish or purple flower heads [syn: Joe-
       Pye weed, spotted Joe-Pye weed, Eupatorium maculatum]