Cotton Grass - Wildflower - Greenland

Cottongrass is not a grass at all but a sedge (identified by the triangular stems) of the genus Eriophorum. There are a number of different species found in the Northern Hemisphere in damp acidic situations particularly peat bogs, I suspect this one is Eriophorum scheuchzeri though I am not a botanist and didn't have an identification guide with me.