Corylus californica hort. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Fagales family Betulaceae genus Corylus species Corylus californica Name Homonyms Corylus californica (A.DC.) A.Heller Corylus californica hort. ex K.Koch, 1873 Corylus californica (DC.) Rose Corylus californica hort.