Cladium mariscus is a species of flowering plant in the
sedge family known by the common names
swamp sawgrass,
great fen-sedge,
saw-sedge or
sawtooth sedge. Previously it was known as
elk sedge. It is native of temperate Europe and Asia where it grows in
base-rich boggy areas and lakesides. It can be up to tall, and has leaves with hard serrated edges.