Reviewed
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, wild
Polygonum convolvulus
Dock, broadleaf
Rumex obtusifolius
Knotweed, prostrate
Polygonum aviculare
Ladysthumb
Polygonum persicaria
Smartweed, hedge
Polygonum scandens
Smartweed, Pennsylvania
Polygonum pensylvanicum
For an idea of relative seed size, each photo contains a millimeter ruler. The distance between increments is 1 mm.