| Name | Porpidia hydrophila (Fries) H. Hertel & A. J. Schwab |
| Authorship | (Fries) H. Hertel & A. J. Schwab |
| Rank | Species |
| Placed in | Porpidia Körber |
| Citation | 1984 Beih. Nova Hedwigia 79: 437 |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Porpidia hydrophila (Fries) H. Hertel & A. J. Schwab |
| Identification made in | [no date] (7) |