Wetland Indicator Status: OBL Other names: Common Threesquare, Three-square Synonym: Schoenoplectus pungens Note: sometimes lumped together with Chairmakers rush (Scirpus americanus)
Threesquare bulrush (Scirpus pungens) gets its name from the three sided stems that are triangular in cross-section, and about 3 feet (1 meter) in length. The shorter nature of this bulrush makes it unable to tolerate deeper water. Although it is said to have no substrate preference, I find the most densely growing stands growing in sand. Its triangular stems seem to give it strength to tolerate breaking waves along the shore. It also grows a little later in the season, which means it will see less high water in spring. Threesquare bulrush is a good for wildlife, for both food and cover. Along the lake shore pictured below were hundreds of leopard frogs.