Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Helianthus decapetalus L. image
Photographer: from USDA Plants website           
Family Asteraceae
Helianthus decapetalus L.
forest sunflower, pale sunflower, thin-leaved sunflower
Helianthus: derived from two Greek words helios, "sun," and anthos, "flower," in reference to the sunflower's supposed tendency to always turn toward the sun
decapetalus: Latin for "ten petals"
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, perennial, 2'-5' tall forb; stems smooth below the hairy inflorescence
Flower: head 1 1/2"-4" wide with 8-15 yellow rays and a yellow, 3/4" wide disk; inflorescence one to a few heads on long stalks, bracts (phyllaries) usually longer than the disk, pointed, leaf-like, slightly spreading; blooms Aug.-Oct.
Leaf:opposite along lower stem, upper becoming alternate, widely oval to lance-like, often 1 1/2" wide, quickly tapering to the stalk, thin, pale below, sharply toothed
Habitat: woods, streambanks

More Information Natural Communities Herbarium Specimens
All Helianthus list Google- Images or Text

Flora of North America (off site)
Helianthus scrophulariifolius Britton
Helianthus tracheliifolius Mill.

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