Synonyms
Isnardia sphaerocarpa (Elliott) DC.
Ludwigia sphaerocarpa var. deamii Fernald & Griscom
Ludwigia sphaerocarpa var. typica Fernald & Griscom
Ludwigia sphaerocarpa var. jungens Fernald & Griscom
Ludwigia sphaerocarpa var. macrocarpa Fernald & Griscom