• Ludwigia Bayle, 1878 † [Family: Graphoceratidae]
• Ludwigia Linnaeus, 1753 [Family: Onagraceae]
• Ludwigia Mostler, 1969 † (uncertain) [Family: Holothuroidea (awaiting allocation)]
• Ludwigia Pic, 1891 [Family: Cerambycidae]
• Ludwigia Reiffen, 1901 accepted as Heterothyone Panning, 1949 [Family: Heterothyonidae]
• Ludwigia alata Ell.
• Ludwigia alternifolia Linnaeus
• Ludwigia americana Domantay, 1958
• Ludwigia arcuata Walt.
• Ludwigia bonariensis (M. Micheli) Hara
• Ludwigia brevipes (B.H. Long ex Britt., A. Braun & Small) Eames
• Ludwigia cornu (Buckman, 1881) †
• Ludwigia curtissii Chapman
• Ludwigia decurrens Walt.
• Ludwigia erecta (L.) Hara
• Ludwigia glacialis (Ljungman, 1879) accepted as Ocnus glacialis (Ljungman, 1879)
• Ludwigia glandulosa Walt.
• Ludwigia grandiflora (M. Micheli) Greuter & Burdet accepted as Ludwigia uruguayensis (Camb.) Hara
• Ludwigia hexapetala (Hook. & Arn.) Zardini, Gu & Raven accepted as Ludwigia uruguayensis (Camb.) Hara
• Ludwigia hirtella Raf.
• Ludwigia hyssopifolia (G. Don) Exell apud A.R. Fernandes
• Ludwigia lacustris Eames
• Ludwigia lanceolata Ell.
• Ludwigia leptocarpa (Nutt.) Hara
• Ludwigia linearis Walt.
• Ludwigia linifolia Poir.
• Ludwigia lixoides (Lucas, 1849)
• Ludwigia longifolia (DC.) Hara
• Ludwigia maritima Harper
• Ludwigia microcarpa Michx.
• Ludwigia murchisonae †
• Ludwigia natans Ell. accepted as Ludwigia repens J.R. Forst.
• Ludwigia octovalis (Jacq.) Raven
• Ludwigia octovalvis (Jacq.) Raven
• Ludwigia palustris (L.) Ell.
• Ludwigia peploides (Kunth) Raven
• Ludwigia peruviana (L.) Hara
• Ludwigia petiti Cherbonnier, 1957 accepted as Ocnus petiti (Cherbonnier, 1958)
• Ludwigia pilosa Walt.
• Ludwigia polycarpa Short & Peter
• Ludwigia ravenii Peng
• Ludwigia repens J.R. Forst.
• Ludwigia simpsonii Chapman
• Ludwigia simulata Small accepted as Ludwigia alata Ell.
• Ludwigia spathulata Torr. & Gray
• Ludwigia spathulifolia Small accepted as Ludwigia curtissii Chapman
• Ludwigia sphaerocarpa Ell.
• Ludwigia suffruticosa Walt.
• Ludwigia uruguayensis (Camb.) Hara
• Ludwigia virgata Michx.
• Ludwigia yellow vein Vietnam virus
• Ludwigia yellow vein virus
• Ludwigiantha (J. Torrey & A. Gray) J.K. Small, 1897 accepted as Ludwigia Linnaeus, 1753
• Ludwigiantha arcuata (Walt.) Small accepted as Ludwigia arcuata Walt.
• Ludwigiantha brevipes B.H. Long ex Britt., A. Braun & Small accepted as Ludwigia brevipes (B.H. Long ex Britt., A. Braun & Small) Eames