Helianthus annuus L.
Family: Asteraceae
common sunflower,  more...
[Helianthus annuus subsp. jaegeri L.,  more]
Helianthus annuus image
Robert R. Kowal  
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, annual, 3'-10' tall forb with leafy, roughly hairy stems
Leaves: mostly alternate, long-stalked, largest wide and oval, rough on both sides
Flowers: head 3"-6" wide with yellow rays and a flat, dark disk at least 1 1/4" wide; inflorescence with several heads in a branched cluster, escaped cultivated forms usually with only 1 large head; blooms July-Sept.
Fruits: dry, edible seed
Habitat: sun; moist; disturbed sites
Hazardous: Careful, this plant is hazardous!
Conservation Status: Introduced - naturalized
Helianthus annuus image
Robert R. Kowal  
Helianthus annuus image
Merel R. Black  
Helianthus annuus image
Janice Stiefel  
Helianthus annuus image
Botanical Illustration  
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
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Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
Helianthus annuus image
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