Arctagrostis macrophylla Nash ex Britton & Rydb. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Poaceae genus Arctagrostis species Arctagrostis arundinacea Name Homonyms Arctagrostis macrophylla Nash Arctagrostis macrophylla Nash ex Britton & Rydb.