| Man’yō Name | Tawamidura 多波美豆貞（ たはみづら） |
| Modern Name | Hirumushiro 蛭蓆（ヒルムシロ） |
| English Names | roundleaf pondweed, bog pondweed |
| Scientific Name | F. Potamogetonaceae Potamogeton distinctus |
| Distribution | Hokkaido, Honshu, Shikoku |
| Appearance | |
| Seasonal Association |
Summer |
Poems (1)
| MYS XIV: 3501 |