Reed canary grass, perennial phalaris (Gardener's-garters, alpiste roseau, rohrglanzgras,)
Phalaris arundinacea

The stems can reach 2 meters in height.The leaf blades are usually green, but may be variegated. The panicles are up to 30 centimeters long.The spikelets are light green, often streaked with darker green or purple.This is a perennial grass which spreads underground by its thick rhizomes.