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Hygrophytic, tufted perennial 440-820 mm tall; stoloniferous; sheaths papery; leaves cauline. Leaf blade 200-500 x 3.0-7.5 mm, linear, glabrous; ligule a fringed membrane, 1.8-5.4 mm long. Inflorescence 200-600 mm long. Spikelet 2.1-3.5 mm long, 2-6-flowered; glumes unequal, shorter than spikelet, often tinged purplish; upper glume obtuse to rounded, without mucro or awn; lemma laterally compressed, keeled, entire or bifid, hairy along nerves; anthers 0.3-0.6 mm long, dark maroon; caryopsis 0.6-0.9 mm long, elliptic-oblong.
Perennial, hydrophyte, stoloniferous, and tufted, up to 0.82 m high. Leaf blades 200-500 mm long, 3.0-7.5 mm wide, leaf sheaths white, papery and glabrous. Spikelets 2.1-3.2 mm long. Panicle 200-600 mm long; spikelets 2-6-flowered; glumes unequal, shorter than lemmas.
A cereal grass. It keeps growing from year to year. It grows 1 m tall. The leaf blades are 5-25 cm long by 2-9 mm wide. They can be flat or slightly rolled. The flowering shoots are 10-50 cm long. The seed is 7-9 mm long.
