Helianthus grosseserratus M.Martens
Family: Asteraceae
saw-tooth sunflower
[Helianthus grosseserratus f. plenifolius M.Martens,  more]
Helianthus grosseserratus image
Kitty Kohout  
Etymology: 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
Plants: erect, perennial, 2'-10' tall forb; stems usually smooth below inflorescence, but sometimes with a whitish fuzz
Leaves: opposite along the lower stem, center and upper alternate; lance-like, usually with sharp teeth, upper surface slightly rough, lower surface with short whitish hairs, often folded upward along the midrib, stalk usually winged leaf drawing
Flowers: head 2 1/4" - 4 1/2" wide, 10-20 yellow rays, spreading bracts (phyllaries) longer than the yellow disk; inflorescence in large, loose clusters with many heads on stalks more than 4" long; blooms July-Oct.
Habitat: full sun; wet to moderate moisture; prairies, marshes; in sandy, loamy soil
Conservation Status: Native
Helianthus grosseserratus image
Kitty Kohout  
Helianthus grosseserratus image
Robert W. Freckmann  
Helianthus grosseserratus image
Merel R. Black  
Helianthus grosseserratus image
Hugh H. Iltis  
Helianthus grosseserratus image
Hugh H. Iltis  
Helianthus grosseserratus image
Kenneth J. Sytsma  
Helianthus grosseserratus image
Merel R. Black  
Helianthus grosseserratus image
Helianthus grosseserratus image
Aaron Carlson  
Helianthus grosseserratus image
Aaron_Carlson  
Helianthus grosseserratus image
Helianthus grosseserratus image
Merel R. Black  
Helianthus grosseserratus image
Merel R. Black  
Helianthus grosseserratus image
Merel R. Black  
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Aaron_Carlson  
Helianthus grosseserratus image
Helianthus grosseserratus image
Emmet J. Judziewicz  
Helianthus grosseserratus image
Helianthus grosseserratus image
Aaron Carlson  
Helianthus grosseserratus image
Helianthus grosseserratus image
Aaron_Carlson  
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
Helianthus grosseserratus image
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