Betula schmidtii f. angustifolia (Makino & Nemoto) Sugim. Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Fagales family Betulaceae genus Betula species Betula schmidtii Name Homonyms Betula schmidtii var. angustifolia Makino & Nemoto Betula schmidtii f. angustifolia (Makino & Nemoto) Sugim. ex H.Ohba Betula schmidtii f. angustifolia (Makino & Nemoto) Sugim.