Helianthus giganteus


Helianthus giganteus, 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 growing up to 4 m tall. The leaves are slender, lanceolate. The flower heads are bright yellow, up to 7 cm in diameter. They are most commonly found in valleys with wet meadows or swamps.