| Name | Hypnum aduncum var. giganteum Schimper |
| Authorship | Schimper |
| Rank | Variety |
| Placed in | Hypnum aduncum Hedwig |
| Citation | 1854 Bryol. Eur. 6: 11. 606S (fasc. 57–61 Mon. 36. 24,2S) |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Hypnum aduncum var. giganteum Schimper |
| Identification made in | [no date] (3) |
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