| Name | Ammannia diffusa Willdenow |
| Authorship | Willdenow |
| Rank | Species |
| Placed in | Ammannia Linnaeus |
| Citation | 1809 Enum. Pl. [Willdenow] 1: 167. |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Ammannia diffusa Willdenow |
| Identification made in | [no date] (3) |
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