| Name | Leptodictyum riparium var. gracile Warnstorf |
| Authorship | Warnstorf |
| Rank | Variety |
| Placed in | Leptodictyum riparium (Hedwig) Warnstorf |
| Citation | 1913 Hedwigia 54: 119 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Leptodictyum riparium var. gracile Warnstorf |
| Identification made in | [no date] (1) |