Syst. Nat., edn 10, 855 (1759) APNI
Semi-aquatic, long-rhizomatous and stoloniferous perennial. Culms erect or ascending, to c. 60 cm high; nodes of prostrate stems often hairy. Leaves mostly distichous; blade flat, to 20 cm long and 7 mm wide, glabrous or ciliate along margins near base; sheath ciliate along margins; ligule truncate, c. 1 mm long. Panicle forked, racemes 2–6 cm long. Spikelets shortly pedicellate, in two rows, elliptic, 2.5–3.5 mm long, acute; lower glume absent or rudimentary, to c. 1 mm long; upper glume 3–6-nerved (mid-vein sometimes developed) as long as spikelet, sparsely covered with fine appressed hairs; lower lemma 3–5-nerved, equal to upper glume; fertile lemma slightly shorter than spikelet, slightly rounded dorsally, firm, smooth or minutely ridged longitudinally. Flowers Feb.–May.
*CVU, *DunT, *EGL, *EGU, *GipP, *Glep, *Gold, *HNF, *HSF, *MuF, *MuM, *MSB, *NIS, *OtP, *OtR, *RobP, *Strz, *VRiv, *VVP, *WaP, *Wim. Naturalized in all States except NT, Tas. Native in many tropical and warm-temperate countries, but apparently introduced in Australia. Fairly common, bordering rivers, marshes, swamps and on well-watered, cultivated land. Generally found in or near fresh water, but tolerates a degree of brackishness.
Sometimes considered native in Victoria (and some other parts of Australia), but its restriction to mainly disturbed habitats and its otherwise near-tropical known natural occurrence strongly suggests that it is an introduction here.
|Bioregion||Occurrence status||Establishment means|
|Victorian Volcanic Plain||present||naturalised|
|Murray Scroll Belt||present||naturalised|
|Central Victorian Uplands||present||naturalised|
|Northern Inland Slopes||present||naturalised|
|East Gippsland Lowlands||present||naturalised|
|East Gippsland Uplands||present||naturalised|
|New South Wales|
|Australian Capital Territory|