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Tufted perennial 500-1300 mm high; usually a hygrophyte; stoloniferous; culm prostrate and rooting at nodes. Leaf blade 50-250 x 5-15 mm; ligule a fringe of hairs. Racemes 10-50 mm long, secund; rachis 1.0-1.9 mm wide, flat and ribbon-like, broadly winged, margins scabrid; spikelets arranged in two rows; pedicels of equal lengths. Spikelet 3.0-4.3 mm long, glabrous; lower glume less than 1/2 as long as spikelet, not separated from upper glume by an internode, 1-nerved; upper lemma obtuse, with a ± obscure mucro, rugulose; anther 1.1-2.3 mm long.
Inflorescence of 4–15 racemes, these 1–10 cm. long, bearing spikelets singly in two neat rows on a flat rhachis 0.5–1.5 mm. wide with scabrid margins.
Inferior glume 1/3–1/2 length of spikelet, arising immediately below the superior.
Culms 50–130 cm. high, prostrate and rooting at the nodes below.
Spikelets 3–4.5 mm. long, glabrous, acute.
Leaf laminae 5–15 mm. wide.
Superior lemma rugulose.
Sprawling perennial.
