| 1 | Native | Northern America | Southern Mexico | Mexico | Campeche | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Northern America | Southern Mexico | Mexico | Yucatán | | Ramamoorthy, T. P. & E. M. Zardini. 1987. The systematics and evolution of Ludwigia sect. Myrtocarpus sensu lato (Onagraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 19:114-116. |
| 1 | Native | Southern America | Brazil | Brazil | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Caribbean | Cuba | | | Ramamoorthy, T. P. & E. M. Zardini. 1987. The systematics and evolution of Ludwigia sect. Myrtocarpus sensu lato (Onagraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 19:114-116. |
| 1 | Native | Southern America | Caribbean | Jamaica | | | Ramamoorthy, T. P. & E. M. Zardini. 1987. The systematics and evolution of Ludwigia sect. Myrtocarpus sensu lato (Onagraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 19:114-116. |
| 1 | Native | Southern America | Central America | Costa Rica | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Central America | El Salvador | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Central America | Guatemala | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Central America | Honduras | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Central America | Nicaragua | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Central America | Panama | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Northern South America | Guyana | | | Ramamoorthy, T. P. & E. M. Zardini. 1987. The systematics and evolution of Ludwigia sect. Myrtocarpus sensu lato (Onagraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 19:114-116. |
| 1 | Native | Southern America | Northern South America | Venezuela | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Southern South America | Paraguay | | | Ramamoorthy, T. P. & E. M. Zardini. 1987. The systematics and evolution of Ludwigia sect. Myrtocarpus sensu lato (Onagraceae). Monogr. Syst. Bot. Missouri Bot. Gard. 19:114-116. |
| 1 | Native | Southern America | Western South America | Bolivia | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Western South America | Colombia | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Western South America | Ecuador | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |
| 1 | Native | Southern America | Western South America | Peru | | | Davidse, G. et al., eds. 1994. Flora mesoamericana. |