Missouri Weed Seeds - Page 42
Rubiaceae (Madder family)
Broadleaf plant family
Although a large family of plants with about 600 genera, there are about eight genera present in Missouri. The genus, Galium, is the largest in this state with at least 11 species, including a common winter annual, catchweed bedstraw.
For an idea of relative seed size, each photo contains a millimeter ruler. The distance between increments is 1 mm.