Elymus durus Steud. Dataset GBIF Backbone Taxonomy Rank SPECIES Published in Nomencl. Bot., ed. 2, 1: 550 (1840) Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Poaceae genus Elymus species Elymus virginicus Name Homonyms Elymus durus (Keng) S.L.Chen Elymus durus Steud.