Eleocharis R.Br.
Leaves reduced to scales sheathing the base of the culms Eleocharis
Culms transversely septate only or not septate. Glumes with a few nerves only or nerveless either side of midrib
Culms transversely septate
Glumes without side veins. Spikelets cylindrical, up to c. 3 cm long, 3–4 mm wide. Wyong. Ponds and swamps Eleocharis equisetina
Glumes hardened on the back, with a distinct side vein. Spikelets cylindrical, 3–5 cm long, acute. Nut lenticular. Plants up to 2 m high. Widespread. Ponds and swamps. Tall Spike Rush Eleocharis sphacelata