| Name | Placidium arboreum (Schweinitz ex E. Michener) Lendemer |
| Authorship | (Schweinitz ex E. Michener) Lendemer |
| Rank | Species |
| Placed in | Placidium A. Massalongo |
| Citation | 2004 Mycotaxon 90(2): 320 |
| Holdings | 28 Specimens held in the Harvard University Herbaria identified as Placidium arboreum (Schweinitz ex E. Michener) Lendemer |
| Identification made in | [no date] (27), 2019 (1) |