Ulmus rubra hort. ex Loudon Dataset GBIF Backbone Taxonomy Rank SPECIES Published in Arbor. Brit. iii. 1398. Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Rosales family Ulmaceae genus Ulmus species Ulmus rubra Name Synonyms Ulmus rubra hort. Homonyms Ulmus rubra Muhl. Ulmus rubra hort. ex Loudon Ulmus rubra F.Michx. Ulmus rubra hort.