| Name | Callitriche japonica Engelmann ex Hegelmaier |
| Authorship | Engelmann ex Hegelmaier |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Callitriche Linnaeus |
| Citation | 1868 Verh. Bot. Vereins Prov. Brandenburg 10: 113 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Callitriche japonica Engelmann ex Hegelmaier |
| Identification made in | [no date] (2), 1865 (1), 2016 (1), 2017 (1) |