Sporobolus cynosuroides is a species of grass known by the common names big cordgrass[1] and salt reedgrass.

It is native to the East Coast and Gulf Coast of the United States, where it grows in coastal habitat such as marshes, lagoons, and bays.

[2] This species is a rhizomatous perennial grass which can grow up to 10 feet tall.

[3] This grass grows in flooded saline soils such as those in salt marshes.

It is associated with marsh-hay cordgrass (Spartina patens) and common reed (Phragmites australis).