Polygonum douglasii Greene
Common Name: WESTERN SMARTWEED
Coefficient of Conservatism: 5
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt A-Forb

Sandy soil of open places (sometimes with Polygonum articulatum) in the west-central Lower Peninsula and counties bordering Lake Michigan in the Upper Peninsula, but on dry rock outcrops and “mountains” in the northwestern Upper Peninsula and Isle Royale; ± disjunct from western North America.

Locations

Alger County
Allegan County
Benzie County
Crawford County
Delta County
Gogebic County
Houghton County
Keweenaw County
    Including Isle Royale
Leelanau County
Marquette County
Mecosta County
Muskegon County
Newaygo County
Ontonagon County
Schoolcraft County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 12, 2017. http://michiganflora.net/species.aspx?id=2296.