Robert W. Freckmann Herbarium


  Helianthus annuus L. image
Photographer: Robert R. Kowal           

Botanical Illustration

Merel R. Black

Robert R. Kowal

Janice Stiefel
Family Asteraceae
Helianthus annuus L.
common sunflower, garden 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
annuus: Latin for "yearly" usually referring to a plant which lives only one season
Hazardous hazard symbol- click for definition
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Introduced - naturalized
Plant: erect, annual, 3'-10' tall forb with leafy, roughly hairy stems
Flower: 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.
Fruit:dry, edible seed
Leaf:mostly alternate, long-stalked, largest wide and oval, rough on both sides
Habitat: sun; moist; disturbed sites
(Glossary)

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

Flora of North America (off site)
Synonyms 
Helianthus annuus L. subsp. jaegeri (Heiser) Heiser
Helianthus annuus L. subsp. lenticularis (Douglas ex Lindl.) Cockerell
Helianthus annuus L. subsp. texanus Heiser
Helianthus annuus L. var. annuus
Helianthus annuus L. var. lenticularis (Douglas ex Lindl.) Steyerm.
Helianthus annuus L. var. macrocarpus (DC.) Cockerell
Helianthus annuus L. var. texanus (Heiser) Shinners
Helianthus aridus Rydb.
Helianthus lenticularis Douglas ex Lindl.

         
  Home
Faculty
Botany News/Events
Projects
Book We Recommend
Historical Botanists
Other Links
Botanical Club of Wisconsin (off site)
UW-Stevens Point Biology Dept.
 
Plants of Wisconsin
Vascular Plants
Bryophytes
Ethnobotany
Natural Communities
Botany News/Events
Other Links
Lichens (off site)   
Tom Volk's Fungi (off site)
Taxonomy of Vascular Plants
                          Vascular Plants
Browse by Identification Guides
Family Wildflowers
Genus Trees
Common Names Shrubs
Search by Vines
Names Aquatic-Semi aquatic
Specimens Ferns - Fern Allies
Blooming Times Grasses, Sedges, or Rushes
County & Status Other Resources  
Town Range Taxonomy of Vascular Plants
  WI Checklist & CofC Values
Bryophytes
Browse by:
Common Name
Genus
Search by:
County
 Name
Copyright 2012 Permissions Contact Us Web Map