| Name | Carex atrofusca var. minor (Boott) T. Koyama |
| Authorship | (Boott) T. Koyama |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Carex atrofusca Schkuhr |
| Holdings | 6 Specimens held in the Harvard University Herbaria identified as Carex atrofusca var. minor (Boott) T. Koyama |
| Identification made in | [no date] (4), 2009 (2) |