English: Swamp sawgrass; Great fen-sedge; Saw-sedge; Sawtooth sedge; Twig-sedge; Elk sedge.
Region: temperate Europe, Asia.
Botany: deeply buried rhizomes that can produce tall shoots with dense canopies; habitat base-rich boggy areas, lakesides, extremely infertile conditions, low in phosphorus; up to 2 metres high; leaves with hard serrated edges.
Use: developing biofuel.