helianthus annuus

from WordNet (r) 3.0 (2006)

Helianthus annuus
    n 1: annual sunflower grown for silage and for its seeds which
         are a source of oil; common throughout United States and
         much of North America [syn: {common sunflower}, {mirasol},
         {Helianthus annuus}]

from The Collaborative International Dictionary of English v.0.48

Sunflower \Sun"flow`er\, n.
   Any plant of the genus {Helianthus}; -- so called probably
   from the form and color of its flower, which is large disk
   with yellow rays. The commonly cultivated sunflower is
   {Helianthus annuus}, a native of America.
   [1913 Webster]

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