| Name | Collybia sedula P. W. Graff |
| Authorship | P. W. Graff |
| Rank | Species |
| Placed in | Collybia |
| Citation | 1935 Bull. Torrey Bot. Club 62: 218 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Collybia sedula P. W. Graff |
| Identification made in | [no date] (2) |