| Classification | Verrucariaceae |
| Classification 1 | Placidium: Verrucariaceae |
| Harvard University Herbaria Barcode(s) | 00473502 |
| Collector | T. A. Williams |
| Country | United States of America |
| State | Maryland |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Maryland |
| Locality | [data not captured] |
| Date Collected | 1898-05-** |
| Project | Lichen and Bryophyte TCN |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/a5ec5149-d308-4005-8a38-c3398888f1de |
| Harvard University Herbaria Barcode | 00473502 |
| Herbarium | FH |
| Family | Verrucariaceae |
| Determination | Placidium tuckermanii (Ravenel ex Montagne) Breuss |
| Determination Remarks | [0] |
| Family | Verrucariaceae |
| Determination | Placidium arboreum (Schweinitz ex E. Michener) Lendemer |
| Determination Remarks | [is filed under name] [is Current name] |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Packet |
| Preparation Method | Dried |
