Copy permalink to share
Asteraceae
Helianthus

not marked as a favorite taxon 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.

Glossary (beta!)

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

Show in key(s)

Show parent genus | Show parent in key(s)

Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: UPL
  • Eastern Mountains and Piedmont: FACU
  • Great Plains: FACU
  • Midwest: FACU
  • Northcentral & Northeast: FACU

Heliophily ⓘ: 7

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.

image #1 of Helianthus strumosus© Gary P. Fleming | Original Image ⭷
image #2 of Helianthus strumosus© 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 #3 of Helianthus strumosus© Diana Soteropoulos, some rights reserved (CC BY-NC), uploaded by Diana Soteropoulos source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #4 of Helianthus strumosus© 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 #5 of Helianthus strumosus© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image #6 of Helianthus strumosus© Grant Morrow Parkins | Original Image ⭷
image #7 of Helianthus strumosus© abelkinser, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #8 of Helianthus strumosus© abelkinser, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #9 of Helianthus strumosus© abelkinser, some rights reserved (CC BY-NC) source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #10 of Helianthus strumosus© Gary P. Fleming | Original Image ⭷
image #11 of Helianthus strumosus© Gary P. Fleming | Original Image ⭷
image #12 of Helianthus strumosus© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image #13 of Helianthus strumosus© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image #14 of Helianthus strumosus© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image #15 of Helianthus strumosus© Diana Soteropoulos, some rights reserved (CC BY-NC), uploaded by Diana Soteropoulos source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #16 of Helianthus strumosus© Michael J. Papay, some rights reserved (CC BY), uploaded by Michael J. Papay source CC-BY | Original Image ⭷
image #17 of Helianthus strumosus© Michael John Oldham, some rights reserved (CC BY-NC), uploaded by Michael John Oldham source CC-BY-NC, permission granted to NCBG | Original Image ⭷

Feedback

See something missing or incorrect about Helianthus strumosus? Let us know here:
  1. Please include your name and if possible, email in case when need to clarify what you wrote.
  2. If you opt out of including email, please be as specific as possible (e.g., which photo is incorrect?)
  3. Please do not submit questions asking to identify plants or about horticultural topics (e.g., how do I control an invasive plant in my garden?). Instead, those questions can be submitted here for the Carolinas region only.
  4. Please do not send us feedback about unkeyed species as this work is ongoing.
  5. Please allow time for flora edits to show in our next data release. We greatly appreciate your feedback but may require extra time to research complicated taxonomic issues.

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.

comments:

cultural notes:

germination code:

native range:



0 unsaved edits on this page.