Betula excelsa Hook. Dataset GBIF Backbone Taxonomy Rank SPECIES Published in Fl. Bor.-Amer. 2: 156 (1838) Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Fagales family Betulaceae genus Betula species Betula lenta Name Homonyms Betula excelsa Aiton Betula excelsa (Dryand.), 1813 Betula excelsa Hook. Betula excelsa Pursh