Crataegus engelmannii f. engelmannii Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Rosales family Rosaceae genus Crataegus species Crataegus berberifolia Name Homonyms Crataegus engelmannii f. engelmannii Crataegus engelmannii var. engelmannii