Eriophorum brachyantherum
 
Close-Sheathed Cottongrass

Two Shoots

Greenbush Bog, 20 km West of Hudson Bay, SK on Highway #3
30-May-2017

Note the culms are densely tufted and that each culm contains a single spikelet.  Note also that the uppermost leaf sheath is above the middle of the culm.