alar
Alnus
Mill.
Alnus alnobetula
björkal
Art
Alnus alnobetula subsp. alnobetula
europeisk björkal
Underart
Alnus alnobetula subsp. crispa
amerikansk björkal
Underart
Alnus alnobetula subsp. fruticosa
sibirisk björkal
Underart
Alnus alnobetula subsp. sinuata
sitka-al
Underart
Alnus cordata
italiensk al
Art
Alnus glutinosa
klibbal
Art
Alnus incana
gråal
Art
Alnus incana subsp. incana
vanlig gråal
Underart
Alnus incana var. argentata
karelsk gråal
Varietet
Alnus incana var. incana
vanlig gråal
Varietet
Alnus incana subsp. kolaënsis
lappal
Underart
Alnus incana subsp. rugosa
hasselal
Underart
Alnus mandschurica
Alnus mandschurica
Art
Alnus rubra
rödal
Art
Alnus glutinosa × incana
klibbal × gråal
Hybrid