Isolepis hystrix (Thunb.) Nees

Awned Club-rush

Linnaea 7: 496 (1832) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Dwarf tufted annual. Culms filiform, to 5 cm high but often less than 1 cm high. Leaf-blades as long as or exceeding inflorescence. Spikelets 1–3, squarrose, to 5 mm long; involucral bract usually spreading, exceeding inflorescence, to 2 cm long; glumes very flattened, with awn about as long as body of glume and strongly excurved, with sides conspicuously 2- or 3-nerved, hyaline to straw-coloured, often red-tinged, 2.5–3.3 mm long (including awn); stamens 2. Style 3-fid. Nut equally trigonous, narrow-obovoid to ellipsoid, minutely reticulate (cell outlines slightly transversely elongate), dull, grey to black, c. one-third as long as glume body, 0.6–0.7 mm long, c. 0.5 mm diam Flowers spring.

*CVU, *DunT, *GipP, *Glep, *Gold, *GGr, *HNF, *HSF, *LoM, *MuF, *NIS, *OtP, *VRiv, *VVP, *WaP, *Wim. Also naturalised in WA, SA, NSW, Tas. Native to southern Africa. Widespread and locally abundant in areas prone to seasonal inundation chiefly in the west of the State, typically occurring within mixed populations of short-lived annual species.

The species appears to have increased its range dramatically in recent years.

Source: Wilson, K.L. (1994). Cyperaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2017-06-27
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Cyperaceae
genus Isolepis
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Isolepis hystrix in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Isolepis hystrix in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present naturalised
Wimmera present naturalised
Glenelg Plain present naturalised
Victorian Volcanic Plain present naturalised
Victorian Riverina present naturalised
Murray Fans present naturalised
Gippsland Plain present naturalised
Otway Plain present naturalised
Warrnambool Plain present naturalised
Goldfields present naturalised
Central Victorian Uplands present naturalised
Greater Grampians present naturalised
Dundas Tablelands present naturalised
Northern Inland Slopes present naturalised
Highlands-Southern Fall present naturalised
Highlands-Northern Fall present naturalised

State distribution

Distribution map
Western Australia
South Australia
New South Wales