| Name | Collybia biformis (Peck) Singer |
| Authorship | (Peck) Singer |
| Rank | Species |
| Placed in | Collybia |
| GUID | urn:lsid:indexfungorum.org:names:328681 |
| Citation | 1961 ["1961"] Sydowia 15(1-6): 55 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Collybia biformis (Peck) Singer |
| Identification made in | [no date] (5) |