coneflower

from WordNet (r) 3.0 (2006)

coneflower
    n 1: any of various plants of the genus Rudbeckia cultivated for
         their large usually yellow daisies with prominent central
         cones
    2: a wildflower of the genus Ratibida
    3: any of various perennials of the eastern United States having
       thick rough leaves and long-stalked showy flowers with
       drooping rays and a conelike center

from The Collaborative International Dictionary of English v.0.48

Coneflower \Cone"flow`er\, n.
   1. Any plant of the genus {Rudbeckia}; -- so called from the
      cone-shaped disk of the flower head. They are cultivated
      for their large usually yellow daisies with prominent
      central cones. Also, any plant of the related genera
      {Ratibida} and {Brauneria}, the latter usually known as
      {purple coneflower}.
      [Webster 1913 Suppl.]

   2. any of various perennials of eastern US having thick rough
      leaves and long-stalked showy flowers with drooping rays
      and a conelike center.
      [WordNet 1.5]