Alnus incana var. glauca (Michaux) Loudon Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Fagales family Betulaceae genus Alnus species Alnus incana Name Homonyms Alnus incana var. glauca (Michaux) Loudon Alnus incana var. glauca Regel Alnus incana var. glauca (Aiton) Willd.