is a perennial in sunny wetlands, ponds sides, or the like.
The plant bodies grow in clusters to 40-100cm in height, with
slender and erect stems and sparsely alternating leaves. The leaves
are shorter than the stems, narrowly linear, about 3.5mm wide, with
the upper parts ridged and tips sharp. Inflorescences are corymbose
and set themselves 3-6, and lower ones somewhat hang. Spikelets are
7-9mm long, broadly lanceolate-shaped, brown to dark brown, and not
glossy, comprising single florets covered with some scales. Bloom