Ludwigia affinis
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Myrtales
- family: Onagraceae
- genus: Ludwigia
- species: Ludwigia affinis
Rio Branco- Sena Madureira
Acre- Goiás
Goiás- Turiaçu
Maranhão
Brazil
San José
Alajuela- Buenos Aires
Puntarenas
Costa Rica
Nizao
Peravia
Dominican Republic