Calamagrostis coarctata Torrey ex Eaton nom. illeg.

Calamagrostis coarctata Torrey ex Eaton nom. illeg. is a synonym sensu FNA Ed. Comm., 2007 of:

Greeneochloa coarctata P.M. Peterson, Soreng, Romasch. & Barberá, an accepted species name sensu Peterson et al., 2019.