Crataegus margarettiae var. brownii (Britton) Sarg. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Rosales family Rosaceae genus Crataegus species Crataegus margarettae Name Homonyms Crataegus margarettiae var. brownii (Britton) Sarg.