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Helianthus hirsutus Raf.
Hairy Sunflower, Rough Sunflower
Asteraceae (Aster Family)
Synonym(s): Helianthus hirsutus var. stenophyllus, Helianthus hirsutus var. trachyphyllus, Helianthus stenophyllus
USDA Symbol: HEHI2
USDA Native Status: L48 (N), CAN (I)
Hairy sunflower, 3-6 feet tall with leaves finely toothed, up to 6 inches long, tapering from 2 inches wide at the base to a fine point at the end. Stems and leaves are bristly. Ray flowers are 1 inch long and yellow. Disc flowers are brownish to yellow.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Size Notes: Up to about 6 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom InformationBloom Color: Yellow , Brown
Bloom Time: Aug , Sep , Oct , Nov
DistributionUSA: AL , AR , CT , FL , GA , IA , IL , IN , KS , KY , LA , MD , MI , MN , MO , MS , NC , NE , NY , OH , OK , PA , SC , TN , TX , VA , WI , WV
Value to Beneficial InsectsSpecial Value to Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
Herbarium Specimen(s)NPSOT 0630 Collected Nov 5, 1993 in Bexar County by Mike Fox
BibliographyBibref 248 - Texas Wildflowers: A Field Guide (1984) Loughmiller, C. & L. Loughmiller
Bibref 286 - Wildflowers of the Texas Hill Country (1989) Enquist, M.
Search More Titles in Bibliography
Web ReferenceWebref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Additional resourcesUSDA: Find Helianthus hirsutus in USDA Plants
FNA: Find Helianthus hirsutus in the Flora of North America (if available)
Google: Search Google for Helianthus hirsutus
MetadataRecord Modified: 2022-12-28
Research By: TWC Staff