Gahnia filum (Labill.) F.Muell

Chaffy Saw-sedge

Key Vict. Pl. 1: 456 (1888) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Tussock-forming perennial. Culms 60–110 cm high, 2–3 mm diam. Leaf-blades flat to inrolled, erect to spreading, smooth to finely scabrous, as long as or longer than culm, shorter than inflorescence; ligules chartaceous, to 8 mm long; sheaths pink-purplish and dull above to black and very shining at base. Inflorescence very narrow, erect, 20–35 cm long, with 2–3 nodes, spikelet clusters very dense. Spikelets 1-flowered; glumes 3 or 4, similar in size, brown, minutely scabrous to smooth, with acute to acuminate apex; stamens 3; anthers c. 1.8 mm long excluding appendage 0.4–0.5 mm long. Nut ± linear to very narrow-ovoid, trigonous, granulate, glistening, 5–6 mm long, 1.0–1.5 mm diam., straw-coloured to very dark brown. Flowers spring–summer.

Brid, DunT, EGL, EGU, GipP, Glep, GGr, LoM, MuM, OtP, VVP, WaP, WPro, Wim. Also SA, NSW, Tas. Fringing saline and subsaline swamps and marshes in lowlands, sometimes coextensive with G. trifida.

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.
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Cyperaceae
genus Gahnia
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Gahnia filum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Gahnia filum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Bridgewater present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Greater Grampians present native
Dundas Tablelands present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Wilsons Promontory present native

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory