Swamp grass is a type of wetland vegetation that grows in shallow water or on muddy soil. The two most common types of swamp grass are REED (Phragmites australis) and SEDGE (Carex spp.). REED is a tall, perennial grass with hollow stems and feathery leaves, while SEDGE is a shorter grass with solid stems and narrow leaves. Both types of swamp grass provide food and shelter for wildlife, help to filter pollutants from the water, and can be used for erosion control.