University of Missouri Extension

IPM1023, New January 2005

Missouri Weed Seeds

Polygonaceae (Smartweed family)

Broadleaf plant family

Many different species of plants in Missouri are known as smartweeds, some of which are among the state's most common weeds. Of about 30 genera of these plants worldwide, at least six are present in Missouri.

Buckwheat, wildBuckwheat, wild
Polygonum convolvulus

Dock, broadleafDock, broadleaf
Rumex obtusifolius

Dock, curlyDock, curly
Rumex crispus

Knotweed, prostrateKnotweed, prostrate
Polygonum aviculare

Polygonum persicaria

Smartweed, hedgeSmartweed, hedge
Polygonum scandens

Smartweed, PennsylvaniaSmartweed, Pennsylvania
Polygonum pensylvanicum

Sorrel, redSorrel, red
Rumex acetosella

For an idea of relative seed size, each photo contains a millimeter ruler. The distance between increments is 1 mm.

IPM1023 Missouri Weed Seeds | University of Missouri Extension

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