Robert W. Freckmann Herbarium


  Helianthus grosseserratus M.Martens image
Photographer: Merel R. Black           

Emmet J. Judziewicz

Hugh H. Iltis

Hugh H. Iltis

Kitty Kohout

Kenneth J. Sytsma

Merel R. Black

Merel R. Black

Merel R. Black

Merel R. Black

Robert W. Freckmann
Family Asteraceae
Helianthus grosseserratus M.Martens
saw-tooth 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
grosseserratus: grossus for "thick;" serratus for "saw like, serrated, saw toothed"
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, perennial, 2'-10' tall forb; stems usually smooth below inflorescence, but sometimes with a whitish fuzz
Flower: 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.
Leaf: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
Habitat: full sun; wet to moderate moisture; prairies, marshes; in sandy, loamy soil
Notes: very similar to H. giganteus except for shorter hairs on underside of leaf, and softer upper side.
(Glossary)

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

Flora of North America (off site)
Synonyms 
Helianthus grosseserratus M.Martens f. plenifolius Wadmond
Helianthus grosseserratus M.Martens subsp. maximus R.W.Long
Helianthus grosseserratus M.Martens var. hypoleucus A.Gray
Helianthus instabilis E.Watson

         
  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