The most common rush with tufts of dark-green stems to 100cm. Flowerheads appear to come from side of stem as bract is continuous with stem. Usually loose, open but can be more compact, more or less spherical. Stems glossy green, very slightly ridged, but feeling smooth to the touch. Continuous white pith.
Abundant and can be very invasive on damp or wet acidic ground. Fields, roadsides, ditches, marshes, water edges, heaths.
Similar: Compact Rush, J. conglomeratus. Strongly ridged stem, flower always compact.