| Name | Hygrohypnum eugyrium var. mackayi (Schimper) Brotherus |
| Authorship | (Schimper) Brotherus |
| Rank | Variety |
| Placed in | Hygrohypnum eugyrium (Schimper) Loeske |
| Citation | 1908 Nat. Pflanzenfam. Nachtr. [Engler & Prantl] I(3): 1040 |
| Holdings | 17 Specimens held in the Harvard University Herbaria identified as Hygrohypnum eugyrium var. mackayi (Schimper) Brotherus |
| Identification made in | [no date] (17) |