Juncus sarophorus L.A.S.Johnson

Broom Rush

Contr. New South Wales Natl Herb. 3: 242 (1963) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Tufted perennial with horizontal or ascending rhizomes. Cataphylls tight or loose, dark brown to dark reddish-brown towards the base, to c. 30 cm long. Culms erect, dull green or bluish-green, 70–180 cm high and 1.0–4.0 mm diam.; striations 20–50, strongly raised, usually relatively widely spaced and easily counted; pith interrupted or rarely some culms with almost continuous cobwebby pith, air spaces variable in size but usually fairly small; stomates sunken in pits. Inflorescence rather dense, fan-shaped, flowers scattered (rarely clustered) along numerous branchlets; primary bract continuous with culm, to c. 40 cm long; prophylls present. Tepals with a green or very faintly reddish tinged midrib, drawn out to a long acute or acuminate apex, 2.0–2.5 mm long; stamens 3 (rarely 6), anthers 0.3–0.6(–0.9) mm long. Capsules usually stramineous or with a darker golden-brown or reddish-brown apex, slightly shorter than or equal to the outer tepals, 1.7–2.3 mm long. Flowers mostly Nov.–Feb., seeds shed mostly Dec.–Mar.

CVU, DunT, EGL, EGU, GipP, Gold, GGr, HFE, HNF, HSF, MonT, MuF, MSB, NIS, OtP, OtR, SnM, Strz, VAlp, VRiv, VVP, WaP, Wim. Also SA, NSW, ACT, Tas. New Zealand. A common species (particularly east of Melbourne) occurring on sites which are inundated or saturated for a considerable period.

The dense broom-shaped inflorescence is a diagnostic feature of this species. The inflorescence of Juncus usitatus is sometimes similar but is readily distinguished by the characters noted under that species. Rare specimens of J. sarophorus with slightly clustered flowers are similar (in the dried state) to forms of J. gregiflorus with less clustered inflorescences, but two can be separated on culm colour and striations, position of the stomates and tepal apices. Known to hybridize with J. semisolidus, J. subsecundus, J. pallidus, J. gregiflorus, J. brevibracteus and J. amabilis.

Source: Albrecht, D.E. (1994). Juncus. 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, 2019-03-04
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Juncaceae
genus Juncus
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Juncus sarophorus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Juncus sarophorus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Scroll Belt 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
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
Australian Capital Territory