| Name | Ditrichum giganteum R. S. Williams |
| Authorship | R. S. Williams |
| Rank | Species |
| Placed in | Ditrichum |
| Citation | 1901 Bull. New York Bot. Gard. 2(6): 113 |
| Holdings | 19 Specimens held in the Harvard University Herbaria identified as Ditrichum giganteum R. S. Williams |
| Identification made in | [no date] (19) |