| Name | Betula nana subsp. exilis (V. N. Sukacev) Hultén | 
| Authorship | (V. N. Sukachev) Hultén bis | 
| Rank | Subspecies | 
| Placed in | Betula nana Linnaeus | 
| Citation | 1944 Acta Univ. Lund. 2, 40, nr. 1: 579 | 
| Holdings | 25 Specimens held in the Harvard University Herbaria identified as Betula nana subsp. exilis (V. N. Sukacev) Hultén | 
| Identification made in | [no date] (25) | 
