Helianthus giganteus, the giant sunflower or tall sunflower, is a species of Helianthus native to the eastern United States and eastern and central Canada, from Newfoundland west to Alberta south to Minnesota, Mississippi, and South Carolina.
Helianthus giganteus is a perennial herbaceous plant that can grow up to NaNm (-2,147,483,648feet) tall. The leaves are slender and lanceolate. The flower heads are bright yellow, up to 7frac=2NaNfrac=2 in diameter. They are most commonly found in valleys with wet meadows or swamps[1] and even near river banks.
The Choctaw Indians of the southeastern United States have traditionally cultivated the Helianthus giganteus and made a palatable bread by mixing the ground sunflower seed with that of ground maize.[2]