„Bjarkarætt“: Munur á milli breytinga

| classis = [[Tvíkímblöðungar]] (''Magnoliopsida'')

| ordo = [[Beykiættbálkur]] (''Fagales'')

| authority = [[John Edward Gray|Gray]]<ref name="apgiii">{{Citation |author=Angiosperm Phylogeny Group |year=2009 |title=An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III |journal=Botanical Journal of the Linnean Society |volume=161 |issue=2 |pages=105–121 |url=http://www3.interscience.wiley.com/journal/122630309/abstract |accessdate=2010-12-10 |doi=10.1111/j.1095-8339.2009.00996.x }}</ref>

| type_genus = ''[[Betula]]''