Calamagrostis arundinacea var. purpurascens (R. Brown) Porsild

Calamagrostis arundinacea var. purpurascens (R. Brown) Porsild is a synonym sensu FNA Ed. Comm., 2007 of:

Calamagrostis purpurascens R. Brown, an accepted species name sensu FNA Ed. Comm., 2007.