| Name | Plagiothecium denticulatum var. aptychus (Spruce) F. Lees | 
| Authorship | (Spruce) F. Lees | 
| Rank | Variety | 
| Placed in | Plagiothecium denticulatum (Hedwig) Schimper | 
| Citation | 1881 London Cat. Brit. Moss. Hepat. 18. | 
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Plagiothecium denticulatum var. aptychus (Spruce) F. Lees | 
| Identification made in | [no date] (3) |