⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-21521, and has not been changed.
This name is a synonym of Betula nana subsp. exilis (Sukaczev) Hultén.
The record derives from WCSP which reports it as a synonym (record 21521) with original publication details: Fl. Ross. 3: 654 1850.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:32181-2.