| Name | Drepanocladus aduncus var. hamatum (Schimper) Grout |
| Authorship | (Schimper) Grout |
| Rank | Variety |
| Placed in | Drepanocladus aduncus (Hedwig) Warnstorf |
| Citation | 1908 Moss. Hand-lens Microsc. 315 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Drepanocladus aduncus var. hamatum (Schimper) Grout |
| Identification made in | [no date] (3) |