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Panicle 13-30 x 2·5-5 cm., very narrowly obconical, erect or very rarely nodding, dense; rhachis rather stout, obtusely angular, smooth, glabrous; branches usually somewhat appressed to the rhachis or obliquely ascending, angular, smooth or asperulous.
Leaf-laminae 7-19 x 0·1-0·5 cm., narrowly linear, tapering to an acute point, green often tinged with purple, flaccid, smooth or somewhat asperulous on the upper surface mainly along the margins, glabrous, finely nerved; the midrib distinct.
Leaf-sheaths usually shorter than the internodes, scarious, loose, striate, smooth, glabrous, shortly auricled and often bearded at the mouth; the lowermost often bladeless, scale-like, brownish.
Sterile lemmas very short, subulate or very narrowly triangular, acute, always appressed to the fertile floret; the inferior 1·3-2 mm., the superior 1·75-2·5 mm. long.
Culms 30-80(-100) cm. tall, 3-6(-8)-noded, usually geniculately ascending or prostrate, producing aerial roots at the nodes, striate, smooth, glabrous.
Palea about as long as the lemma, very narrow, similar to the lemma in consistency and indument, apex usually drawn out into a short point.
Normally behaving as an annual, but Jacques-Felix (l.c.) states that it will perennate if watered during the dry season
Spikelets 6·5-9·25 x 1·25 x 1·5 mm., deciduous, obliquely attached to the pedicel, linear-oblong in lateral view.
Glumes reduced to a short rim which is entire or inconspicuously 2-lobed.
Ligule 1-2 (rarely more) mm. long, truncate, sometimes lacerate.
Pedicels 1·5-2·5 mm. long, robust.
A weak caespitose annual.
Culms 30–45 cm. high
