| Poaceae | |
Calamagrostis purpurascens subsp. arctica
| (Vasey) Hultén | Fl. Alaska Yukon 2: 170 | 1942 |
| Poaceae | |
Calamagrostis purpurascens var. arctica
| (Vasey) Kearney | Bull. Div. Agrostol., U.S.D.A. 11: 19 | 1898 |
| Poaceae | |
Calamagrostis purpurascens fo. compacta
| Louis-Marie | Rev. Oka Agron. Inst. Agric. 20: 153 | 1946 |
| Poaceae | * |
Calamagrostis purpurascens fo. laricina
| Louis-Marie | Rev. Oka Agron. Inst. Agric. 20: 153 | 1946 |
| Poaceae | |
Calamagrostis purpurascens subsp. laricina
| (Louis-Marie) Elven | J. Bot. Res. Inst. Texas 2(1): 434 | 2008 |
| Poaceae | |
Calamagrostis purpurascens var. laricina
| Louis-Marie | Rev. Oka Agron. Inst. Agric. 20: 153 | 1946 |
| Poaceae | |
Calamagrostis purpurascens subsp. maltei
| (Polunin) A.E. Porsild | Naturaliste Canad. 4: 5 | 1974 [1975] |
| Poaceae | |
Calamagrostis purpurascens var. maltei
| Polunin | Bull. Natl. Mus. Canada 92: 51 | 1940 |
| Poaceae | |
Calamagrostis purpurascens var. ophitidis
| J.T. Howell | Leafl. W. Bot. 4(10): 246–247 | 1946 |
| Poaceae | |
Calamagrostis purpurascens subsp. purpurascens
| | | |
| Poaceae | |
Calamagrostis purpurascens var. purpurascens
| | | |
| Poaceae | |
Calamagrostis purpurascens subsp. tasuensis
| Calder & Roy L. Taylor | Canad. J. Bot. 43(11): 1388–1389 | 1965 |
| Poaceae | |
Calamagrostis purpurascens var. tasuensis
| (Calder & Roy L. Taylor) B. Boivin | Naturaliste Canad. 94(4): 521 | 1967 |
| Poaceae | * |
Calamagrostis purpurascens var. vaseyi
| (Beal) M.E. Jones | Contr. W. Bot. 14: 9 | 1912 |