Bromus madritensis var. rigidus (Roth) Bab. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Poaceae genus Bromus species Bromus rigidus Name Homonyms Bromus madritensis var. rigidus (Roth) Bab. ex Syme Bromus madritensis var. rigidus (Roth) Bab.