Crataegus brevispina Douglas Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Rosales family Rosaceae genus Crataegus species Crataegus douglasii Name Homonyms Crataegus brevispina Kunze Crataegus brevispina Douglas ex Steud. Crataegus brevispina Douglas