Heliopsis helianthoides (L.) Sweet
Common Name: FALSE SUNFLOWER
Coefficient of Conservatism: 5
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt P-Forb

Heliopsis helianthoides A. A. Reznicek

Prairies, fens, meadows, river banks, and other moist ground; savannas and thickets (especially at borders and clearings) with aspen, birch, and other trees; evidently spreading along roadsides and railroads.

This species is frequently mistaken for one of Helianthus (see couplet 43 in key to genera of Group B for a reminder of the differences). It could also be hastily confused with Silphium integrifolium, if one recognized a sunflower-like plant but with fertile ray flowers (thus not Helianthus); Silphium has the upper leaves entire or nearly so and essentially sessile, while Heliopsis has the leaves rather coarsely toothed and clearly petioled.

This is a variable species; two varieties have been recognized in Michigan: var. helianthoides in southern Michigan with glabrous or sparsely pubescent leaves and var. scabra (Dunal) Fernald with scabrous leaves occurring throughout the state.

Locations

Alger County
Alpena County
Antrim County
Baraga County
Berrien County
Cass County
Cheboygan County
Chippewa County
Clare County
Delta County
Dickinson County
Emmet County
Gogebic County
Grand Traverse County
Hillsdale County
Houghton County
Iosco County
Iron County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
Lenawee County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Marquette County
Menominee County
Monroe County
Oakland County
Ontonagon County
Presque Isle County
Schoolcraft County
St. Clair County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 15, 2017. http://www.michiganflora.net/species.aspx?id=360.