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Polygonaceae

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Rumex venosus Pursh

M. Doyle
Polygonum douglasii Greene

Leland Jacob Gier
Polygonum cuspidatum Siebold & Zucc.

Virginius Heber Chase
Polygonum sagittatum L.

William James Cody
Polygonum phytolaccaefolium Meisn.

L. J. Dennis and Frank H. Smith
Polygonum erectum L.

Leland Jacob Gier
Polygonum amphibium L.

G. G. Gray
Rumex verticillatus L.

G. G. Gray
Rumex hastatulus Baldw.

K.I. Beamish and F. Vrugtman
Rumex acetosella L.

Virginius Heber Chase
Rumex obtusifolius L.

Virginius Heber Chase
Rumex acetosella L.

John E. Ebinger
Rumex acetosella L.

William James
Rumex crispus L.

William James
Polygonum douglasii Greene

Georgia Mason
Polygonum amphibium L.

Ted Sims
Polygonum amphibium L.

Leland Jacob Gier
Rumex crispus L.

Norman Tracy
Polygonum arifolium L.

John E. Ebinger
Polygonum amphibium L.

Martin and Beckman
Polygonum virginianum L.

Phipps and Speer
Polygonum persicaria L.

A.E. Radford
Polygonum lapathifolium L.

Hiram F. Thut
Polygonum lapathifolium L.

Hiram F. Thut
Polygonum pensylvanicum L.

Hiram F. Thut