(n) 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. Helianthus annuus, mirasol
(n) slender hairy plant with few leaves and golden-yellow flower heads; sandy desert areas of southeastern California to southwestern Utah and western Arizona and northwestern Mexico, Syn. Gerea canescens
(n) any plant of the genus Tithonia; tall coarse herbs or shrubs of Mexico to Panama having large flower heads resembling sunflowers with yellow disc florets and golden-yellow to orange-scarlet rays, Syn. tithonia
(n) whitish hairy plant with featherlike leaves and a few stout stems each bearing an especially handsome solitary large yellow flower head; mountainous regions north central United States, Syn. Tetraneuris grandiflora, alpine sunflower, Hymenoxys grandiflora
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
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 ]