| Name | Polytrichastrum xanthopilum (Wilson ex Mitten) G. L. Smith |
| Authorship | (Wilson ex Mitten) G. L. Smith |
| Rank | Species |
| Placed in | Polytrichastrum |
| Citation | 1971 Mem. New York Bot. Gard. 21(3): 35. |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Polytrichastrum xanthopilum (Wilson ex Mitten) G. L. Smith |
| Identification made in | [no date] (2) |