Helianthus annuus, the
common sunflower, is a large
annual forb of the genus
Helianthus grown as a crop for its edible oil and edible fruits (sunflower seeds). This sunflower species is also used as bird food, as livestock forage (as a meal or a
silage plant), and in some industrial applications. The plant was first domesticated in the
Americas. Wild
Helianthus annuus is a widely branched annual plant with many flower heads. The domestic sunflower, however, often possesses only a single large
inflorescence (flower head) atop an unbranched stem. The name
sunflower may derive from the flower's head's shape, which resembles the sun, or from the false impression that the blooming plant appears to slowly turn its flower towards the sun as the latter moves across the sky on a daily basis.