Ludwigia major
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Myrtales
- family: Onagraceae
- genus: Ludwigia
- species: Ludwigia major
Santana do Livramento
Rio Grande do Sul
Brazil
Rivera
Rivera
Uruguay
Ludwigia major Santana do Livramento Rivera