Polygonum ramosissimum Michx.
Common Name: BUSHY KNOTWEED

Coefficient of Conservatism: 7
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Nt A-Forb
Polygonum ramosissimum B. S. Walters

Sandy or gravelly shores of the Great Lakes (or similarly sandy disturbed sites slightly inland); plants from southern Michigan are from disturbed sites and along railroads and are doubtless introduced. Sometimes confused with P. aviculare, P. erectum or P. achoreum, but more erect than any form of the variable P. aviculare and with the fruiting perianths 3.5–4.5 mm long, at least partly on exserted pedicels; in P. aviculare the perianth is smaller and the pedicels nearly or quite hidden in the ocreolae. The leaves are more narrow and acute than in any plants of P. erectum and P. achoreum, which may be erect but have more broadly elliptic to obovate blades.

Locations

Alcona County
Alger County
Alpena County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Delta County
Emmet County
Leelanau County
    Only on Fox Islands
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Menominee County
Presque Isle County
Schoolcraft County
St. Clair County
Van Buren County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 19, 2014. http://www.michiganflora.net/species.aspx?id=2298.