Blister Sedge, Inflated Sedge, Small Inflated Sedge
Carex vesicaria var. vesicaria
Synonym: Carex inflata, Carex vesicaria

Blister sedge as seen in a vernally moist meadow at Panacanic in western Klickitat County, May 17, 2013.
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Close-up images of the inflorescence of blister sedge as seen in a vernally moist meadow at Panacanic in western Klickitat County, May 17, 2013.
Paul Slichter