Helianthus × laetiflorus

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;

Helianthus × laetiflorus, the cheerful sunflower[2] or perennial sunflower,[3] is a plant in the family of 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]

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

"Helianthus × laetiflorus Pers.". The Global Compositae Checklist (GCC) – via The Plant List. Note that this website has been superseded by World Flora Online
USDA, NRCS (n.d.). "Helianthus × laetiflorus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 21 July 2015.
BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
"Helianthus X laetiflorus". State-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
Scoggan, H. J. (1979). "Part 4, Dicotyledoneae: Loasaceae to Compositae". Flora of Canada. Ottawa: National Museums of Canada. pp. 1117–1711.
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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[1] "Helianthus × laetiflorus Pers.". The Global Compositae Checklist (GCC) – via The Plant List. Note that this website has been superseded by World Flora Online

[2] USDA, NRCS (n.d.). "Helianthus × laetiflorus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 21 July 2015.

[BSBI07-3] 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.