Cyperus erythrorhizos Muhl.

Cyperus erythrorhizos Muhl.. Cyperus erythrorhizos, also known as red-rooted flatsedge or redroot flatsedge, is a species of flowering plant in the sedge family Cyperaceae. It is native to North America, ranging from Canada to Mexico. It has bright red roots, a distinctive feature not found in any other North American flatsedge. Both the scientific name and the common name emphasize this fact.