| Name | Elymus tsukushiensis Honda |
| Authorship | Honda |
| Rank | Species |
| Placed in | Elymus Linnaeus |
| Citation | 1936 Bot. Mag. (Tokyo) 50: 391 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Elymus tsukushiensis Honda |
| Identification made in | [no date] (1) |