WordNet (r) 3.0 (2006):

Indian paintbrush
    n 1: erect perennial of eastern and southern United States
         having showy orange flowers [syn: butterfly weed, orange
         milkweed, chigger flower, chiggerflower, pleurisy
         root, tuber root, Indian paintbrush, Asclepias
         tuberosa]
    2: any of various plants of the genus Castilleja having dense
       spikes of hooded flowers with brightly colored bracts [syn:
       Indian paintbrush, painted cup]