Calamagrostis purpurascens subsp. arctica (Vasey) Hultén

Calamagrostis purpurascens subsp. arctica (Vasey) Hultén is a synonym sensu FNA Ed. Comm., 2007 of:

Calamagrostis sesquiflora (Trinius) Tzelev, an accepted species name sensu FNA Ed. Comm., 2007.