Synonym(s): Helianthus montanus, Helianthus saxicola
Image ID: 31342
Image by: Amyx, Herbert L.
Image Collection: NCBG Digital Library
SCIENTIFIC NAME: Helianthus strumosus
Include in WOTAS: 1
Publish to Web: 1
Last Modified: 2018-02-06
GENUS CODE: HELIA3 GENUS SCIENTIFIC:Helianthus GENUS AUTHORITY: L. GENUS COMMON: Sunflower GENUS SUMMARY: A genus of about 50 species, herbs, of North America. GENUS IDENTIFICATION: GENUS REFERENCES: Schilling in FNA (2006c); Heiser et al. (1969); Cronquist (1980)=SE; Schilling et al. (1998). Key adapted from FNA, SE, RAB, and Heiser et al. (1969).
FAMILY CODE: ASTERA FAMILY SCIENTIFIC:Asteraceae FAMILY AUTHORITY: Dumortier 1822 or COMPOSITAE Giseke 1792 FAMILY COMMON: Aster Family FAMILY SUMMARY: A family of about 1500-1700 genera and 20,000-25,000 species, shrubs, herbs, trees, and vines, cosmopolitan in distribution. FAMILY REFERENCE: Cronquist (1980)=SE throughout family treatment.
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. 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: HEIGHT: 3-9 ft. DURATION:
Opposite LEAF COMPLEXITY:
Simple LEAF RETENTION: FLORAL CHARACTERISTICS
BLOOM TIME: Late Jul-Sep
BLOOM COLOR: Yellow
FRUITING PERIOD: DISTRIBUTION
HABITAT TYPE: Disturbed, Dry forests, Woods margins
NATIVE RANGE: HORTICULTURAL
Plant Sale Text:
Bloom Table Text:
Sun, Part Shade, Shade
MINIMUM HARDINESS ZONE:
MAXIMUM HARDINESS ZONE:
This information is derived from the U.S. Army Corps of Engineers 2016 National Wetland Plant List, Version 3.3 (Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X). Regions: AGCP-Atlantic and Gulf Coastal Plain, AK-Alaska, AW-Arid West, CB-Caribbean, EMP-Eastern Mountains and Piedmont, GP-Great Plains, HI-Hawaii, MW-Midwest, NCNE-Northcentral and Northeast, WMCV-Western Mountains, Valleys & Coast
SCIENTIFIC NAME: Helianthus strumosus
COMMON NAME: Roughleaf Sunflower
SYNONYMY: [= C, F, FNA, G, Il, K, Pa, RAB, SE, Va, W, WH3, WV; > H. strumosus - S; > H. montanus E.E. Watson - S; > H. saxicolus - S]
PHENOLOGY: Late Jul-Sep.
HABITAT: Woodlands and roadsides.
COMMENTS: ME, MN, and KA south to ne. FL, Panhandle FL, and TX.
RANGE MAP: Helianthus strumosus.png
Key to Map SymbolsABOUT FAMILY (Weakley Flora) Asteraceae Dumortier 1822 or COMPOSITAE Giseke 1792 (Aster Family) SUMMARY: A family of about 1500-1700 genera and 20,000-25,000 species, shrubs, herbs, trees, and vines, cosmopolitan in distribution. REFERENCE: Cronquist (1980)=SE throughout family treatment.ABOUT GENUS (Weakley Flora) Helianthus L. (Sunflower) SUMMARY: A genus of about 50 species, herbs, of North America. REFERENCE: Schilling in FNA (2006c); Heiser et al. (1969); Cronquist (1980)=SE; Schilling et al. (1998). Key adapted from FNA, SE, RAB, and Heiser et al. (1969).
SERNEC: Find Helianthus strumosus in Southeast Regional Network of Experts and Collections (if available) UNC SERNEC: Find Helianthus strumosus in
University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)