Deyeuxia quadriseta (Labill.) Benth.

Reed Bent-grass

Fl. Austral. 7: 581 (1878) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Variable tufted glabrous perennial, culms slender or more commonly robust, 15–150 cm high. Leaf-blades more or less scabrous, flat or loosely inrolled, to 30 cm long and 9 mm wide; ligules obtuse, often toothed, 1.5–7 mm long. Inflorescence typically a dense cylindric panicle, occasionally lobed near base, or sparse and interrupted, to 18 cm long. Spikelets (3–)c. 5(–6) mm long, green or purplish; lower glume slightly to considerably longer than upper, both acute to acuminate, keeled, scabrous along the keel; lemma oblong to narrow-lanceolate, generally c. three-quarters as long as spikelet, shortly 4-toothed at apex, minutely scabrous, awned within the lower third or rarely from near midway; awn usually distinctly exceeding spikelet, twisted in lower part; callus hairs to c. 1 mm long; rachilla bristle not produced. Flowers Oct.–May.

Brid, CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HFE, HNF, HSF, LoM, MonT, MuF, MuM, NIS, OtP, OtR, SnM, Strz, VAlp, VRiv, VVP, WaP, WPro, Wim. All states except NT, Qld. The most widespread and variable Deyeuxia in Victoria, usually occurring in poorly drained areas within a wide range of vegetation types, but not in tall forests or high-alpine situations.

Vickery (1940) briefly circumscribed eight forms of D. quadriseta without erecting formal names for them, and formally recognized var. cylindrica (R. Br.) Vickery, apparently confined to WA. Subsequent workers have not validated any of Vickery's forms and likewise var. cylindrica is generally not maintained.

A noteworthy variant, however, and one probably warranting formal recognition, has been recorded from Wilsons Promontory and the far east and south-west of the State. It has rather weak, slender culms, flaccid leaves and narrow, depauperate panicles with very small spikelets (barely 3 mm).

Source: Walsh, N.G. (1994). Poaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.

Vickery, J.W. (1940). A revision of the Australian species of Deyeuxia Clar. ex Beauv. with notes on the status of the genera Calamagrostis and Deyeuxia., Contributions from the New South Wales Herbarium 1(2): 43-82.

Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Poaceae
genus Deyeuxia
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Deyeuxia quadriseta in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Deyeuxia quadriseta 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
Victorian Riverina present native
Murray Fans present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Wilsons Promontory present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Otway Ranges present native
Strzelecki Ranges present native
Monaro Tablelands present native
Highlands-Far East present native
Victorian Alps present native
Snowy Mountains present native

State distribution

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