Helianthus strumosus Linnaeus. Common name: Roughleaf Sunflower. Phenology: Late Jul-Sep. Habitat: Woodlands and roadsides. Distribution: ME, MN, and KA south to ne. FL, Panhandle FL, and TX.
Origin/Endemic status: Native
Synonymy ⓘ: = Ar, C, F, Fl7, FNA21, G, GrPl, Il, K4, Mi, NE, NY, Oh3, Pa, RAB, SE1, Tat, Tn, Va, W, WH3, WV; > Helianthus montanus E.Watson — S; > Helianthus saxicolus — S; > Helianthus strumosus L. — S; Helianthus strumosus L. Basionym: Helianthus strumosus L. 1753
Links to other floras: = Helianthus strumosus - FNA21
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: UPL
- Eastern Mountains and Piedmont: FACU
- Great Plains: FACU
- Midwest: FACU
- Northcentral & Northeast: FACU
Heliophily ⓘ: 7
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© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Grant Morrow Parkins | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© Scott Ward | Original Image ⭷
© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷Feedback
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Horticultural Information
Intro: Erect, rhizomatous perennial of dry woodlands, prairies, barrens and roadsides.
Stems: Stems often branched above, mostly smooth, but may be slightly hairy below the flower head; often with a whitish coating.
Leaves: Leaves mostly opposite, petiolate, lance-shaped or oval, 3-9 in long, shallowly toothed, thick and firm, rough-hairy above and white-waxy or downy and resin-dotted beneath.
Inforescence:
Flowers: Composite flowers (heads) mostly solitary at ends of branches, 1 1/2-2 1/2 in. wide (may be up to 4 in.), consisting of 8-15 yellow ray florets encircling a center disk of yellow tubular florets. Overlapping, spreading, narrow and pointed bracts with hairy margins surround the base of each head.
Fruits: Fruit a mottled light-and-dark-brown achene.
Comments:
Height: 3-9 ft.
plant sale text:
bloom table text:
description: Erect, rhizomatous perennial of dry woodlands, prairies, barrens and roadsides.
stems: Stems often branched above, mostly smooth, but may be slightly hairy below the flower head; often with a whitish coating.
leaves: Leaves mostly opposite, petiolate, lance-shaped or oval, 3-9 in long, shallowly toothed, thick and firm, rough-hairy above and white-waxy or downy and resin-dotted beneath.
inflorescence:
flowers: Composite flowers (heads) mostly solitary at ends of branches, 1 1/2-2 1/2 in. wide (may be up to 4 in.), consisting of 8-15 yellow ray florets encircling a center disk of yellow tubular florets. Overlapping, spreading, narrow and pointed bracts with hairy margins surround the base of each head.
fruits: Fruit a mottled light-and-dark-brown achene.
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