Shallow Sedge (Carex lurida)

Where to plant: muddy zone just above the high-water mark
Type: rush or sedge (perennial)
Height x spread: 1.5-3.0 x 1-2 ft.
Blooms: summer
Bloom: green
Sun: full sun to partial shade
Water: medium to wet 
Maintenance: low
Tolerates: deer, erosion, wet soil

http://www.newmoonnursery.com/plant/Carex-lurida