Helianthus giganteus

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Helianthus giganteus
Helianthus giganteus.jpg
Scientific classification
Kingdom:
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Order:
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Species:
H. giganteus
Binomial name
Helianthus giganteus
Synonyms[1]
  • Helianthus alienus E.Watson
  • Helianthus borealis E.Watson
  • Helianthus subtuberosus (Britton) Britton
  • Helianthus validus E.Watson

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[edit]

  1. ^ "Helianthus giganteus". The Global Compositae Checklist (GCC) – via The Plant List.
  2. ^ "Helianthus giganteus". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 14 January 2018.
  3. ^ "Helianthus giganteus". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  4. ^ a b Schilling, Edward E. (2006). "Helianthus giganteus". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). 21. New York and Oxford – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  5. ^ Wisconsin Plant of the Week: Helianthus giganteus