| Name | Hypericum nakaii H. Koidzumi |
| Authorship | H. Koidzumi |
| Rank | Species |
| Placed in | Hypericum Linnaeus |
| Citation | 1937 J. Pl. Iwateken 2(2): 99 (1937) |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Hypericum nakaii H. Koidzumi |
| Identification made in | [no date] (1), 2023 (1) |