| Name | Trapa natans var. japonica Nakai |
| Authorship | Nakai |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Trapa natans Linnaeus |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Trapa natans var. japonica Nakai |
| Identification made in | [no date] (1) |
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