joe-pye weed

from 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}]

from 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]