| Name | Isopterygium alstonii E. B. Bartram |
| Authorship | E. B. Bartram |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Isopterygium |
| Citation | 1953 Bryologist 56: 168 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Isopterygium alstonii E. B. Bartram |
| Identification made in | [no date] (1), 1988 (1) |