| Name | Isothecium myosuroides f. filescens (Renauld) Warnstorf |
| Authorship | (Renauld) Warnstorf |
| Rank | Forma |
| Placed in | Isothecium myosuroides Bridel |
| Citation | 1905 Krypt.-fl. Brandenburg 708 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Isothecium myosuroides f. filescens (Renauld) Warnstorf |
| Identification made in | [no date] (1) |