Calamagrostis canadensis var. scabra (J. Presl) Hitchcock

Calamagrostis canadensis var. scabra (J. Presl) Hitchcock is a synonym sensu FNA Ed. Comm., 2007 of:

Calamagrostis canadensis var. langsdorffii (Link) Inman, an accepted variety name sensu FNA Ed. Comm., 2007.