⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-21517, 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 21517) with original publication details: Bot. Not. 128: 505 1975 publ. 1976.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:874740-1.