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Polygonum hydropiper Michx.

John E. Ebinger
U. S. A., Illinois, Shelby
19-Jul-1973
Polygonum hydropiper Michx.

John E. Ebinger
U. S. A., Illinois, Clinton
23-Jun-2000
Polygonum hydropiper Michx.

John E. Ebinger
U. S. A., Illinois, Mason
13-Sep-1995
Polygonum hydropiper Michx.

Bob Edgin
U. S. A., Illinois, Lawrence
20-Aug-1999
Polygonum hydropiper Michx.

June Keibler
U. S. A., Illinois, Kane
10-Sep-1991
Polygonum hydropiper Michx.

W. E. McClain
U. S. A., Wisconsin, Buffalo
17-Sep-1974
Polygonum hydropiper Michx.

Loy R. Phillippe
U. S. A., Illinois, Clark
20-Sep-1971
Polygonum hydropiper Michx.

A. W. Poitras
U. S. A., Illinois, Champaign
10-Aug-1947
Polygonum hydropiper Michx.

Gordon C. Tucker
U. S. A., Illinois, Coles
26-Aug-1999
Polygonum hydropiper Michx.

Gordon C. Tucker and Edwin H. Horning
U. S. A., New York, Suffolk
15-Oct-1999
Polygonum hydropiper Michx.

Gordon C. Tucker and Edwin H. Horning
U. S. A., New York, Suffolk
Polygonum hydropiper Michx.

Tad M. Zebryk
U. S. A., Massachusetts, Franklin
4-Sep-2000
Polygonum hydropiper Michx.

Tad M. Zebryk
U. S. A., Massachusetts, Hampden
21-Aug-2002
Polygonum hydropiperoides Michx.

Jonathan Clark
USA, Texas, Brazos
9-Oct-1972
Polygonum hydropiperoides Michx.

Larry Dennis
U. S. A., Illinois, Moultrie
7-Aug-1969
Polygonum hydropiperoides Michx.

Bob Dunn
U. S. A., Illinois, Calhoun
23-Aug-1976
Polygonum hydropiperoides Michx.

John E. Ebinger
U. S. A., Illinois, Douglas
9-Jul-1969
Polygonum hydropiperoides Michx.

John E. Ebinger
U. S. A., Indiana, Spencer
26-Sep-1980
Polygonum hydropiperoides Michx.

John E. Ebinger
U. S. A., Illinois, Coles
20-Aug-1968
Polygonum hydropiperoides Michx.

John E. Ebinger
U. S. A., Illinois, Lawrence
4-Sep-1978
Polygonum hydropiperoides Michx.

John E. Ebinger
U. S. A., Illinois, Effingham
16-Jul-1983
Polygonum hydropiperoides Michx.

John E. Ebinger
U. S. A., Illinois, Mason
24-Jul-2000
Polygonum hydropiperoides Michx.

John E. Ebinger
U. S. A., Illinois, Vermilion
2-Sep-1977
Polygonum hydropiperoides Michx.

John E. Ebinger
U. S. A., Indiana, DuBois
14-Aug-1980
Polygonum hydropiperoides Michx.

John E. Ebinger
U. S. A., Indiana, Fountain
12-Sep-1980