Synonyms: Calamagrostis exaristata; Calamagrostis hakonensis var. argyraea; Calamagrostis hakonensis var. aristata; Calamagrostis hakonensis var. exaristata; Calamagrostis hakonensis var. glauca; Calamagrostis hakonensis var. koidzumiana; Calamagrostis hiyamana; Calamagrostis koidzumiana; Calamagrostis matsumurae var. aristata; Calamagrostis matsumurae var. exaristata; Calamagrostis orthophylla; Calamagrostis sachalinensis var. argyraea; Calamagrostis sachalinensis var. argyrea; Calamagrostis sachalinensis var. hakonensis; Calamagrostis scaberrima; Deyeuxia hakonensis (homotypic)