Helianthus giganteus
| Helianthus giganteus | |
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| Species: | H. giganteus
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| Helianthus giganteus | |
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Helianthus giganteus (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.[2][3][4]
Helianthus giganteus is a perennial herbaceous plant growing up to 4 m (over 13 feet) tall. The leaves are slender, lanceolate. The flower heads are bright yellow, up to 7 cm (2.8 inches) in diameter. They are most commonly found in valleys with wet meadows or swamps.[5][4]
References
- ^ "Helianthus giganteus". The Global Compositae Checklist (GCC) – via The Plant List. Note that this website has been superseded by World Flora Online
- ^ "Helianthus giganteus". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 14 January 2018.
- ^ "Helianthus giganteus". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
- ^ a b Schilling, Edward E. (2006). "Helianthus giganteus". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 21. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
- ^ Wisconsin Plant of the Week: Helianthus giganteus
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