| Name | Sphagnum dusenii var. majus Cardot |
| Authorship | Cardot |
| Rank | Variety |
| Placed in | Sphagnum dusenii (C. E. O. Jensen) Russow |
| Citation | 1897 Bull. Soc. Hist. Nat. Autun 10: 289 [Re|4pert. Sphagnol. 57] |
| Holdings | 6 Specimens held in the Harvard University Herbaria identified as Sphagnum dusenii var. majus Cardot |
| Identification made in | [no date] (6) |