Betula alnus var. glutinosa Gaertn Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Fagales family Betulaceae genus Alnus species Alnus glutinosa Name Homonyms Betula alnus var. glutinosa L. Betula alnus subsp. glutinosa (L.) Ehrh. Betula alnus var. glutinosa Gaertn