| Name | Rhytidiadelphus triquetrus (Hedwig) Warnstorf |
| Authorship | (Hedwig) Warnstorf |
| Rank | Species |
| Placed in | Rhytidiadelphus |
| Contains | Rhytidiadelphus triquetrus var. beringianus (Cardot & Thériot) Grout Rhytidiadelphus triquetrus f. californicus (Renauld & Cardot) Grout |
| Citation | 1906 Krypt.-fl. Brandenburg 2(5): 920 |
| Holdings | 304 Specimens held in the Harvard University Herbaria identified as Rhytidiadelphus triquetrus (Hedwig) Warnstorf |
| Identification made in | [no date] (303), 2016 (1) |