| Name | Sphagnum cymbifolium f. laxum Warnstorf |
| Authorship | Warnstorf |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Sphagnum cymbifolium (Ehrhart) Hedwig |
| Citation | 1881 Eur. Torfm. 134 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Sphagnum cymbifolium f. laxum Warnstorf |
| Identification made in | [no date] (1) |