Eleocharis elliptica
 
Slender Spike-Rush

Fruiting Spikelet, Stage 1

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

Note the achenes are persistent on the spikelet after the scales fall.  The achenes of E. compressa usually fall with the scales, although some may be persistent.  Note also the wide hyaline region at the apex of the scale.  The hyaline region E. compressa scales are mostly longer than wide.