| Name | Placidium tuckermanii (Ravenel ex Montagne) Breuss |
| Authorship | (Ravenel ex Montagne) Breuss |
| Rank | Species |
| Placed in | Placidium A. Massalongo |
| Citation | 1996 Ann. Naturhist. Mus. Wien, B 98(Suppl.): 39 |
| Holdings | 25 Specimens held in the Harvard University Herbaria identified as Placidium tuckermanii (Ravenel ex Montagne) Breuss |
| Identification made in | [no date] (25) |
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