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Spikelets 3–8 × (0.8)1–1.5 mm, linear to narrowly elliptic-oblong, lightly laterally compressed, (4)7–14-flowered, the lemmas disarticulating from below upwards, the rhachilla persistent below but fragile above; glumes subequal, thinly membranous, 1.5–2.7 mm long, lightly keeled, lanceolate in profile, scaberulous on the keel, subacute to acute at the apex, the inferior reaching to at least 4/5 the way along the adjacent lemma, sometimes right to or even beyond the apex, the superior to about the middle; lemmas 1.5–2 mm long, lightly keeled, narrowly oblong-elliptic in profile, membranous but with obscure lateral nerves, ± appressed to the rhachilla, those in opposite rows not imbricate, the rhachilla visible between them, grey-green, minutely asperulous, obtuse to subacute at the apex; palea persistent, glabrous on the flanks, the keels slender, wingless, glabrous to scaberulous; anthers 3, 0.7–1 mm long.
Usually erect, loosely tufted annual to 800 mm high; culm nodes dark, glandular ring present below nodes. Leaf blade 30-150 x 2-4 mm; sheaths with or without oblong glands. Inflorescences lowest branches whorled, axils hairy. Spikelet 3-8 x 0.5-1.5 mm, eglandular; rachilla persistent in the lower part and fragile above; lemmas and/or paleas breaking up from the base upwards; lower glume at least 4/5 up lemma above, upper glume up to 1/2 of lemma above; lowest lemma 1.5-1.7 mm long, chartaceous to membranous, broadly elliptic, obtuse to subacute, lateral nerves obscure or distinct, occurring towards base where lemma folds; palea keels minutely scaberulous; margins very close for entire length, almost touching at apex, wide between keel and margin; anthers 3, 0.8-1.0 mm long; caryopsis ellipsoid.
Caespitose annual, short-lived perennial or tussocky perennial without rhizomes, the leaves mostly cauline; culms up to 80(100) cm tall, erect or ascending, stout or wiry, sometimes rooting from the lower nodes, branched or unbranched, glabrous at the nodes, sometimes pilose on the internodes, usually with a ring of elongated glands below the nodes; leaf sheaths glabrous or rarely pilose with tubercle-based hairs, eglandular or dotted with oblong or circular glandular pits, the basal firmly chartaceous to thinly coriaceous, usually glabrous below, terete or somewhat compressed, inconspicuously ridged; ligule a line of hairs; leaf laminas 3–25 cm × 2–5 mm, linear, flat or involute, glabrous or sparsely pilose with tubercle-based hairs, eglandular.
Loosely tufted annual, up to 800 mm high, usually erect. Leaf blade 30-150 x 2-4 mm; sheaths nearly always dotted with oblong glands; ligule a fringe of hairs. Inflorescence a panicle, lowest branches whorled. Spikelets 3-8 x 0.5-1.5 mm, laterally compressed; rachilla persistent in lower part, fragile above, lemmas and/or paleas breaking up from base upwards; glumes shorter than spikelet, 1-nerved. Florets many; lowest lemma 1.5-1.7 mm long, chartaceous to membranous, broadly elliptic, obtuse to subacute, entire, 3-nerved, lateral nerves obscure; palea keels minutely scaberulous; anthers 3, 0.8-1.0 mm long. Flowering time Jan.-Aug. Caryopsis ellipsoid.
Annual, loosely tufted (usually erect), up to 0.8 m high. Leaf blades 30-150 mm long, 2-4 mm wide. Leaf sheaths nearly always dotted with oblong glands. Spikelets 3-8 mm long, 0.5-1.5 mm wide. Inflorescences with lowest branches whorled; spikelet with rhachilla persistent in lower part and fragile above, lemmas and/or paleas breaking up from base upwards; lower glume four-fifths as long as to longer than lemma above in intact spikelet; lowest lemma 1.5-1.7 mm long, chartaceous to membranous, broadly elliptic, obtuse to subacute, lateral nerves obscure; palea keels minutely scaberulous; anthers 3, 0.8-1.0 mm long. Caryopsis ellipsoid.
Panicle 8–40 cm long, narrowly ovate to narrowly elliptic, loose and open, the spikelets evenly distributed on pedicels 0.5–2.5 mm long, the primary branches mostly unbranched in the lower 1/4, in a succession of whorls, terminating in a fertile spikelet, sometimes glabrous (especially above) but usually thinly to densely pilose in the axils (especially the lowermost whorl), eglandular.
Loosely tufted annual 30–76 cm. high.
Caryopsis 0.5–0.8 mm long, elliptic.
A grass.
