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] This species is also commonly cultivated and may escape cultivation and be found in areas outside of its core range.[5]
| Cheerful sunflower | |
|---|---|
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| Head | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Helianthus |
| Species: | H. × laetiflorus
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| Binomial name | |
| Helianthus × laetiflorus Pers. 1807
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| Synonyms[1] | |
Description
editHelianthus × laetiflorus is a herbaceous plant with alternate, simple leaves, on green stems. The flowers are yellow, borne in late summer.[6][7] This species is generally considered to be of hybrid origin, with the two parental species being Helianthus tuberosus and Helianthus pauciflorus.[5]
References
edit- ^ "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 Note that this website has been superseded by World Flora Online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.
- ^ a b "Helianthus x_laetiflorus in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2024-08-08.
- ^ 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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