Cyperus erythrorhizos var. cupreus (J. Presl & C. Presl) Kükenthal
Cyperus erythrorhizos var. cupreus (J. Presl & C. Presl) Kükenthal is a synonym sensu FNA Ed. Comm., 2002a of:
Cyperus erythrorhizos Muhlenberg, an accepted species name sensu FNA Ed. Comm., 2002a.