Tetrarrhena juncea R.Br.

Forest Wire-grass

Prodr. 210 (1810) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Rhizomatous perennial, long-trailing or climbing to 8 m high. Stems wiry, retrorsely scabrous, usually much-branched, often producing adventitious roots from lower nodes. Leaves spreading, distant or lacking from lower stems, retrorsely scabrous, glabrous or shortly hairy about the ligule; blade flat or nearly so, 1–8 cm long, 2–5 mm wide; ligule ciliate, to 0.3 mm long, sometimes with marginal hair-tufts to 3 mm long. Inflorescence a spike-like raceme 2–7 cm long. Spikelets 5–16 per raceme, 4.5–6.5 mm long, often purplish, subsessile or with pedicels to 3 mm long; glumes subequal, 1.6–3.5 mm long, smooth and glabrous; lemmas glabrous, obscurely 5–7-nerved, lower sterile lemma about two-thirds length of spikelet, obtuse, hardly keeled, upper sterile lemma and fertile lemma similar, obtuse, keeled; palea slightly shorter than fertile lemma, often purplish; stamens 4. Flowers Nov.–Apr.

CVU, EGL, EGU, GipP, Gold, GGr, HFE, HNF, HSF, MonT, NIS, OtP, OtR, SnM, Strz, VAlp, VVP, WaP, WPro, Wim. Most commonly occurring in wet forests but also found in gully vegetation, heaths and woodlands. Often particularly abundant in disturbed areas, e.g. following fire or clearing.

Tetrarrhena juncea var. scabra Benth. appears to be a superfluous synonym, the specimen on which this name is based not being sufficiently distinctive to warrant formal recognition.

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.
Updated by: Neville Walsh, 2015-02-09
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Poaceae
genus Tetrarrhena
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Tetrarrhena juncea in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Tetrarrhena juncea in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Victorian Volcanic Plain 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
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
South Australia
New South Wales