cottonweed

from WordNet (r) 3.0 (2006)

cottonweed
    n 1: an American everlasting having foliage with soft wooly
         hairs and corymbose heads with pearly white bracts [syn:
         {pearly everlasting}, {cottonweed}, {Anaphalis
         margaritacea}]
    2: any of various plants of the genus Froelichia found in sandy
       soils and on rocky slopes in warmer regions of America; grown
       for their spikes of woolly white flowers

from The Collaborative International Dictionary of English v.0.48

Cottonweed \Cot"ton*weed`\ (-w[=e]d`), n. (Bot.)
   See {Cudweed}.
   [1913 Webster]