| Name | Isothecium stoloniferum var. spiculiferum (Mitten) R. D. Williams & W. B. Schofield | 
| Authorship | (Mitten) R. D. Williams & W. B. Schofield | 
| Rank | Variety | 
| Placed in | Isothecium stoloniferum Bridel | 
| Citation | 1970 Taxon 19: 484 | 
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Isothecium stoloniferum var. spiculiferum (Mitten) R. D. Williams & W. B. Schofield | 
| Identification made in | [no date] (2) |