Carex aquatilis Wahlenb.  
Family: Cyperaceae
long-bracted tussock sedge, water sedge
Carex aquatilis image
Andrew Hipp  
Etymology: Carex: the classical Latin name
Plants: erect, perennial sedge
Conservation Status: Native
Carex aquatilis image
from USDA Plants website  
Carex aquatilis image
Robert W. Freckmann  
Carex aquatilis image
Dennis W. Woodland  
Carex aquatilis image
Linda W. Curtis