| Name | Macromitrium st-johnii E. B. Bartram |
| Authorship | E. B. Bartram |
| Rank | Species |
| Placed in | Macromitrium |
| Citation | 1940 Occas. Pap. Bernice Pauahi Bishop Mus. 15(27): 337, f. 7 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Macromitrium st-johnii E. B. Bartram |
| Identification made in | [no date] (2), 1983 (1), 2024 (2) |