⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-21301, 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 21301) with original publication details: Trudy Bot. Muz. Imp. Akad. Nauk 8: 213 1911.