Crataegus aestivalis (Walter) Sarg. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Rosales family Rosaceae genus Crataegus species Crataegus aestivalis Name Homonyms Crataegus aestivalis (Walter) Torr. & A.Gray Crataegus aestivalis Tidestr. Crataegus aestivalis (Walter) Sarg.