| Name | Ludwigia simpsonii Chapman |
| Authorship | Chapman |
| Rank | Species |
| Placed in | Ludwigia de Candolle |
| Citation | 1892 Fl. South. U.S., ed. 2 reprint 2, 685 |
| Holdings | 18 Specimens held in the Harvard University Herbaria identified as Ludwigia simpsonii Chapman |
| Identification made in | [no date] (18) |
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