Rubus pensilvanicus Poir.
Common Name: DEWBERRY
Coefficient of Conservatism: 2
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt Shrub

Roadsides and fields; thickets, forests, and borders of forests; often in moist ground, such as borders of marshes and swamps.

This is a more variable complex than the rather narrowly defined R. allegheniensis complex and the R. canadensis complex. The inflorescence is more often loose and ± corymbose, compared to the distinct racemose shape expected in R. allegheniensis and R. canadensis. As in R. canadensis, rare specimens with a few scattered glands may show some influence of R. allegheniensis.

Locations

Allegan County
Alpena County
Arenac County
Berrien County
Charlevoix County
    Only on Beaver Island
Chippewa County
Crawford County
Dickinson County
Genesee County
Hillsdale County
Houghton County
Ingham County
Ionia County
Kalamazoo County
Kent County
Keweenaw County
    Only on Isle Royale
Lapeer County
Leelanau County
    Only on Manitou Islands
Lenawee County
Livingston County
Mackinac County
    Only on Bois Blanc, Mackinac, Round Islands
Marquette County
Monroe County
Oakland County
Oscoda County
Ottawa County
Presque Isle County
Shiawassee County
St. Clair County
Van Buren 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 16, 2017. http://www.michiganflora.net/species.aspx?id=2562.