Children (11 direct children, 11 direct and indirect children):
Polycarpon tetraphyllum subsp. diphyllum
Polycarpon tetraphyllum subsp. tetraphyllum
Fourleaf manyseed
Polycarpon tetraphyllum var. tetraphyllum
Polycarpon tetraphyllum subsp. sauvagei
Polycarpon tetraphyllum var. alsinifolium
Polycarpon tetraphyllum subsp. catalaunicum
Polycarpon tetraphyllum subsp. colomense
Polycarpon tetraphyllum subsp. depressum
Polycarpon tetraphyllum subsp. dunense
Polycarpon tetraphyllum subsp. herniariodes
Polycarpon tetraphyllum subsp. polycarpoides