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Perennial or annual, 200-1000 mm high; an annual form occurs in Namibia that is less than 300 mm high and has a softer appearance than the hardy, wiry, drought resistant perennial form; culm glabrous. Leaf blade 30-70 x 2.0-3.5 mm, sometimes hairy. Spikelet 2-3 x 1 mm, green, often flushed or almost entirely purple, usually glabrous, very rarely hairy; glumes unequal; lower glume nearly always reduced to a minute scale up to 0.1 mm long; anther 1.5-2.0 mm long.
Inferior glume a tiny nerveless scale 0.1–0.3(rarely 0.7) mm. long, inserted close to the superior; superior glume 5-nerved, broadly ovate, obtuse to emarginate, awnless, sometimes with a short mucro, glabrous or inconspicuously hairy on the margins.
Perennial or annual; up to 1 m high. Culms glabrous. Leaf blades 30-70 x 2.0-3.5 mm; sometimes hairy. Flowers: panicle slightly contracted or open; spikelets 2-3 mm long; 1 mm wide; usually glabrous or very rarely hairy.
Perennial or annual, up to 1 m high. Leaf blades 30-70 mm long, 2.0-3.5 mm wide, leaves sometimes hairy. Culm glabrous. Spikelets 2-3 mm long, 1 mm wide, usually glabrous or very rarely hairy.
Spikelets (1.2)1.4–2.5(3) mm. long, oblong to narrowly ovate in side view, green to straw-coloured, often tinged with purple.
Inferior floret male, its lemma 5-nerved, resembling the superior glume but slightly wider; the palea ciliate on its keels.
Culms (13)20–100(114) cm. high, geniculately ascending and often rooting at lower nodes.
Panicle (4.7)6–14(18) cm. long, broadly ovate; pedicels glabrous.
Decumbent perennial 30–60 cm. high, rooting at the lower nodes
Tufted annual to short-lived perennial.
