Reviewed 
              Caryophyllaceae (Pink family)
Broadleaf plant family
At least 14 species of “chickweed” and several species of sleepy catchfly make up the majority of this family in Missouri.
 Bouncingbet
Saponaria officinalis
 
 Catchfly, sleepy
Silene antirrhina
 
 Chickweed, common
Stellaria media
 
 Chickweed, mouseear
Cerastium vulgatum
 
 Chickweed, nodding
Cerastium nutans
 
For an idea of relative seed size, each photo contains a millimeter ruler. The distance between increments is 1 mm.