| Name | Sphagnum pylaesii f. nigricans Warnstorf |
| Authorship | Warnstorf |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Sphagnum pylaesii Bridel |
| Citation | 1890 Bot. Gaz. 15(10): 243 |
| Holdings | 8 Specimens held in the Harvard University Herbaria identified as Sphagnum pylaesii f. nigricans Warnstorf |
| Identification made in | [no date] (8) |
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