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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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image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Michael John Oldham, some rights reserved (CC BY-NC), uploaded by Michael John Oldham source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Diana Soteropoulos, some rights reserved (CC BY-NC), uploaded by Diana Soteropoulos source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Michael John Oldham, some rights reserved (CC BY-NC), uploaded by Michael John Oldham source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image of plant© Grant Morrow Parkins | Original Image ⭷
image of plant© abelkinser, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© abelkinser, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© abelkinser, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image of plant© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image of plant© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image of plant© Diana Soteropoulos, some rights reserved (CC BY-NC), uploaded by Diana Soteropoulos source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image of plant© Michael John Oldham, some rights reserved (CC BY-NC), uploaded by Michael John Oldham source CC-BY-NC, permission granted to NCBG | Original Image ⭷

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Horticultural Information

NCBG trait

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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