Missouri Weed Seeds - Page 37
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.
For an idea of relative seed size, each photo contains a millimeter ruler. The distance between increments is 1 mm.