Helianthus divaricatus L.
Common Name: WOODLAND SUNFLOWER
Coefficient of Conservatism: 5
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt P-Forb

This is one of the species clearly native to Michigan. It does not occur very far west of the Great Lakes, except at latitudes much farther south. Typically in dry ± open forests and savannas of oak, pine, or aspen, especially at edges; fencerows, fields, roadsides, and railroads.

Some plants with distinct but short petioles and other intermediate characters are considered to be hybrids. Hybrids with H. giganteus have been named H. ×ambiguus (Torr. & A. Gray) Britton; specimens so determined have leaves resembling H. divaricatus or intermediate in shape and sparsely hairy stems. The somewhat dubious Menominee Co. material referred to H. hirsutus could conceivably be this hybrid or something approaching H. strumosus. Other intermediate plants, but with glabrous stems, have been named H. ×divariserratus R. W. Long, the other parent being H. grosseserratus.

Locations

Alcona County
Allegan County
Barry County
Benzie County
Berrien County
Branch County
Calhoun County
Cass County
Cheboygan County
Clare County
Clinton County
Crawford County
Dickinson County
Genesee County
Gogebic County
Grand Traverse County
Gratiot County
Hillsdale County
Huron County
Ingham County
Iosco County
Jackson County
Kalamazoo County
Kent County
Lake County
Lapeer County
Leelanau County
Lenawee County
Livingston County
Macomb County
Mason County
Mecosta County
Monroe County
Montcalm County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Oceana County
Oscoda County
Ottawa County
Presque Isle County
Roscommon County
Shiawassee County
St. Clair County
St. Joseph County
Tuscola County
Van Buren County
Washtenaw County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 18, 2017. http://www.michiganflora.net/species.aspx?id=348.