| Name | Calliergon sarmentosum var. subpinnatum Warnstorf |
| Authorship | Warnstorf |
| Rank | Variety |
| Placed in | Calliergon sarmentosum (Wahlenberg) Kindberg |
| Citation | 1911 Hedwigia 50: 259 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Calliergon sarmentosum var. subpinnatum Warnstorf |
| Identification made in | [no date] (1) |
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