Elymus semicostatus Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Poaceae genus Elymus species Elymus semicostatus Name Homonyms Elymus semicostatus (Nees ex Steud.) Á.Löve Elymus semicostatus (Steud.) Melderis