Helianthus annuus

Definitions of Helianthus annuus
  1. noun
    annual sunflower grown for silage and for its seeds which are a source of oil; common throughout United States and much of North America
    synonyms: common sunflower, mirasol
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    type of:
    helianthus, sunflower
    any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays
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