Arrhenatherum rivulare var. angustifolium Opiz, 1853 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Poaceae genus Arrhenatherum species Arrhenatherum elatius Name Homonyms Arrhenatherum rivulare var. angustifolium Opiz, 1853