Tetrarrhena R.Br.
Inflorescence a simple spike (Fig. 49 b) Tetrarrhena
Leaf blades flat, sometimes scabrous, 1–7 mm wide. Inflorescence mostly 7–9 cm long. Tufted, scrambling perennial with much-branched wiry stems up to 4 m long. Widespread. Damp places in heath. Ss. Fl. spring–summer. Wiry Ricegrass Tetrarrhena juncea
Leaf blades tightly involute around the culm, smooth, up to 1 mm wide. Inflorescence mostly less than 3 cm long. Densely tufted rhizomatous perennial up to 1.3 m high. Widespread. Swamps and along creek banks. Fl. spring–summer Tetrarrhena turfosa