It normally has a short thick rhizome with smooth, trigonous and terete culms. The ascending or spreading leaf blades are with a trigonous and tapering apex. It as slender or rigidulous, trigonous stems that are thick. Following flowering a grey-brown trigonous nut with an obovoid to ellipsoid shape will form. It is obtusely trigonous (triangular in cross-section). The stems are trigonous (roughly triangular in cross-section), but with convex, rounded faces.