Robust perennial. Culms stout, trailing and rooting freely from lower nodes, ascending to 2 m, 5–8 mm in diam., nodes densely villous. Leaf sheaths villous or glabrous; leaf blades broadly linear, 10–30 × 1–2 cm, thinly pilose or subglabrous; ligule membranous, 1–1.3 mm. Inflorescence axis 7–20 cm; racemes 10–20, 5–15 cm, single, paired or grouped; rachis narrow, winged, scabrous; spikelets paired or single in upper part of raceme, in untidy rows or sometimes on short secondary branchlets in lower part of raceme; pedicels usually setose. Spikelets elliptic, green or purplish, 2.5–3.5 mm, glabrous, acute; lower glume triangular, 1/4–1/3 spikelet length, 1-veined; upper glume 5-veined; upper lemma rugulose, apex obtuse. Fl. and fr. Aug–Nov.
Perennial, often rooting at the lower nodes, 0·6–1·8 m. high
Sprawling prennial; culms 25–125 cm. high, prostrate and rooting at the nodes below; leaf-blades 6–30 cm. long, 3–15 mm. wide.
Spikelets elliptic, 2.5–3.5 mm. long, glabrous, acute; lower glume 1/4–1/3 as long as the spikelet; upper glume not separated from the lower by an internode; upper lemma rugulose, obtuse, ± an obscure mucro.
Inflorescence of 5–20 racemes on an axis 7–20 cm. long; racemes 2–10 cm. long, bearing paired spikelets (but these sometimes on short secondary branchlets in the lower part of the raceme or borne singly in the upper part) in several untidy rows on a narrow (0.5–1 mm.) winged rhachis with scabrid margins; pedicels usually with a few long hairs.