Calamagrostis halleriana var. langdorfii (Link) Hack. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Poales family Poaceae genus Calamagrostis species Calamagrostis purpurea Name Homonyms Calamagrostis halleriana var. langdorfii (Link) Hack.