Persicaria pensylvanica (L.) M. Gómez
Synonym: Polygonum pensylvanicum
Coefficient of Conservatism: 0
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt A-Forb

Polygonum pensylvanicum of Michigan Flora.

Like P. lapathifolia, with which it is often associated, it may be abundant on recently exposed shores, river margins and banks, marshes, mucky hollows, old fields, moist or dry disturbed ground.

An annual, readily recognized by the large fruits and flowers, in thick, erect, pink spikes. Occasionally the upper branches of the plant, in addition to the peduncles, are ± densely covered with stalked glands; at the other extreme, an eglandular form is known from northern Ohio. The copious achenes are an important food for waterfowl.


Allegan County
Barry County
Bay County
Benzie County
Berrien County
Branch County
Calhoun County
Cass County
Clare County
Clinton County
Crawford County
Emmet County
Gratiot County
Houghton County
Ingham County
Iron County
Isabella County
Jackson County
Kalamazoo County
Kent County
Lapeer County
Lenawee County
Livingston County
Macomb County
Manistee County
Marquette County
Mecosta County
Menominee County
Midland County
Monroe County
Muskegon County
Newaygo County
Oakland County
Ontonagon County
Ottawa County
Saginaw County
St. Clair County
St. Joseph County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. June 29, 2022.