Alnus crispa hort. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Fagales family Betulaceae genus Alnus species Alnus crispa Name Homonyms Alnus crispa (Aiton) Pursh Alnus crispa hort. ex Steud., 1840 Alnus crispa hort.