Sp. Pl. 45 (1753) APNI
Rhizomatous perennial with slender rhizomes forming ovoid to ellipsoid, woody tubers 0.5–1 cm diam., which annually shed their grey-brown, fibrous coat. Culms triquetrous, smooth, 15–30(–60) cm high, 1–2 mm diam. Leaves not septate-nodulose, shorter than culms, 2–6 mm wide. Inflorescence mostly simple with 3–9 primary branches to 10 cm long; spikes short, ovoid, to 2.5 cm long, to 3 cm diam.; involucral bracts leaf-like, 2–4 not or slightly exceeding inflorescence. Spikelets flattened, 3–10 per spike, 10–40-flowered, 10–25(–30) mm long, 1.5–2.5 mm wide in side view; rachilla broadly winged, persistent; glumes obtuse, with sides 1–3-nerved, 3–3.5 mm long; stamens 3; style 3-fid. Nut rarely maturing in Victoria, trigonous, narrowly obovoid to ellipsoid, dark grey-brown, less than one-half as long as glume, c. 1.5 mm long, c. 0.5 mm diam. Flowers spring–summer.
*CVU, *GipP, *MuF, *MuM, *NIS, *VRiv, *VVP, *Wim. Naturalised in all mainland States. Native to Africa, Asia. A locally common and troublesome weed in disturbed situations, mostly around habitation but occasionally infesting crops.
|Bioregion||Occurrence status||Establishment means|
|Victorian Volcanic Plain||present||naturalised|
|Central Victorian Uplands||present||naturalised|
|Northern Inland Slopes||present||naturalised|
|New South Wales|
|Australian Capital Territory|