Corylus tubulosa subsp. purpurea (Loudon) Audib. Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Fagales family Betulaceae genus Corylus species Corylus maxima Name Homonyms Corylus tubulosa var. purpurea (Loudon) Spach Corylus tubulosa subsp. purpurea (Loudon) Audib. Corylus tubulosa subsp. purpurea (Loudon) Audib. ex Mouill.