Avena pratensis var. longifolia Parn. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Poaceae genus Helictochloa species Helictochloa pratensis Name Homonyms Avena pratensis var. longifolia St.-Yves Avena pratensis var. longifolia Druce