| Name | Calliergon cordifolium var. angustifolium G. Roth | 
| Authorship | G. Roth | 
| Rank | Variety | 
| Placed in | Calliergon cordifolium (Hedwig) Kindberg | 
| Citation | 1904 Eur. Laubm. 2: 572 | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Calliergon cordifolium var. angustifolium G. Roth | 
| Identification made in | [no date] (1) | 
