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Helianthus × laetiflorus, the cheerful sunflower[2] or perennial sunflower,[3] is a plant in the family Asteraceae. It is widespread in scattered locations across much of Canada from Newfoundland to British Columbia, and the central and eastern United States as far south as Texas and Georgia.[4]

Cheerful sunflower
Head
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Helianthus
Species:
H. × laetiflorus
Binomial name
Helianthus × laetiflorus
Pers. 1807
Synonyms[1]
  • Helianthus laetiflorus Pers.
  • Helianthus severus E.Watson
  • Helianthus superbus E.Watson
  • Helianthus tricuspis Elliott

Description


Helianthus × laetiflorus is a herbaceous plant with alternate, simple leaves, on green stems. The flowers are yellow, borne in late summer.[5][6]


References


  1. "Helianthus × laetiflorus Pers.". The Global Compositae Checklist (GCC) – via The Plant List.
  2. USDA, NRCS (n.d.). "Helianthus × laetiflorus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 21 July 2015.
  3. BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
  4. "Helianthus X laetiflorus". State-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  5. Scoggan, H. J. (1979). "Part 4, Dicotyledoneae: Loasaceae to Compositae". Flora of Canada. Ottawa: National Museums of Canada. pp. 1117–1711.
  6. Gleason, H. A. (1968). "The Sympetalous Dicotyledoneae". In Gleason, H. A. (ed.). New Britton and Brown Illustrated Flora of the Northeastern United States and Adjacent Canada. Vol. 3. New York Botanical Garden.


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