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Northern bog sedge is a very fine grass-like perennial that grows in patches. Stems occur scattered along thread-like rhizomes and are 2-30 cm tall. Leaves are wispy and less than 1 mm wide. Stems have one flower/fruit cluster (spike) at their apex. These spikes vary from being composed of entirely male flowers, entirely female flowers, or having male flowers above and female flowers below. Frui...