Eleocharis elliptica
 
Slender Spike-Rush

Flower

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

Each flower has three anthers.  One of the three anthers has already fallen from this specimen.  Note the three stigmas.  E. elliptica usually possess three stigmas, but occasionally there may be only two.  Note the ovule which can be seen through the translucent surface of the ovary.