| Name | Collybia butyracea (Bulliard) P. Kummer: Fries |
| Authorship | (Bulliard) P. Kummer: Fries |
| Rank | Species |
| Placed in | Collybia |
| Citation | 1871 Führer Pilzk. (Zerbst): 117 |
| Holdings | 21 Specimens held in the Harvard University Herbaria identified as Collybia butyracea (Bulliard) P. Kummer: Fries |
| Identification made in | [no date] (21) |
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