Synonyms: Calamagrostis beyrichiana (homotypic); Calamagrostis longearistata (homotypic); Calamagrostis longearistata f. pilosa; Calamagrostis longearistata var. longearistata; Calamagrostis longearistata var. minor; Calamagrostis longiaristata (homotypic); Calamagrostis longiaristata f. pilosa; Calamagrostis longiaristata var. minor; Calamagrostis montevidensis var. linearis; Cinnagrostis rupestris (homotypic); Deyeuxia beyrichiana; Deyeuxia longearistata; Deyeuxia longiaristata; Deyeuxia rupestris (homotypic); Deyeuxia rupestris f. pilosa; Deyeuxia rupestris var. minor