Single, terminal, purple-brown male spikelet. 1-3 stalked, erect, female spikelets with three stigmas to each floret. Ovoid green to purplish fruit, the inner side inflated, minute (0.5mm) beak. Bluish grey-green leaves, +/- flat with 3-sided points, close-fitting sheaths and blunt ligules. Leaves as long as stems, height to 50cm.
Can be abundant on damp, acidic soils, heathy grasslands, fens, bogs and mountain flushes.
Similar: Glaucous Sedge, Carex flacca. Found on calcareous ground, 1-3 male spikeletss