Eleocharis equisetoides (Elliott) Torr.

Eleocharis equisetoides (Elliott) Torr.. Eleocharis equisetoides, with common names including horsetail spike-rush, jointed spike-rush, spikesedge, and knotted spike-rush, is a plant species native to the United States and Ontario, usually in freshwater wetland areas. It is known primarily from the Atlantic coastal plain from Texas to Massachusetts, and the Great Lakes region, with scattered populations elsewhere.