Large-flower Evening-primrose, Large-flower Primrose-willow: Ludwigia grandiflora - ?
False Loosestrife, Primrose Willow, Water Primrose: Ludwigia hexapetala (Synonym: Jussiaea uruguayensis) - Naturalized.
Eastern False Loosestrife, Marsh Seedbox, Marsh Primrose-willow, Water Purslane: Ludwigia palustris (Synonyms: Ludwigia palustris var. americana, Ludwigia palustris var. pacifica) -
Floating Primrose-willow: Ludwigia peploides ssp. montevidensis (Synonym: Ludwigia peploides ssp. montevidensis) -
Floating Primrose-willow: Ludwigia peploides ssp. peploides (Synonyms: Jussiaea repens, Jussiaea repens var. peploides) -