Reed Grass

Glyceria maxima
An erect, rhizomatous perennial grass, reaching up to 7 feet. It is native to wetlands of Eurasia from the British Isles to central Asia & northwest China.
The leaves are up to 0.8 inches wide.
Hardy zones 4 to 7 on wet soil.

'Variegata' ( Variegated Manna Grass )
Reaches up to 2 feet with bright yellow-green foliage that is variegated creamy-white.