Isolepis R.Br. >

Plants in tufts or with a filiform rhizome; nut without hypogynous disc at base Isolepis
Stamens mostly 1 or 2, rarely 3. Spikelets usually with a continuing bract
Spikelet solitary, 3–8 mm long. Nut greyish, c. 1.5 mm long. Lowest glume empty, only rarely produced into a linear lamina longer than the spikelet. Stamens 2, rarely 3. Usually aquatic, often with long narrow leaves rhizomes and culms. When on mud, the leaves are up to 1 mm wide and the culms more erect. Widespread. In water or on wet mud Isolepis fluitans