Juncus australis Hook

Austral Rush

f, Fl. Tasman. 2: 66, t. 134A (1858) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Loosely tufted perennial with horizontal or ascending rhizomes. Cataphylls tight or loose, dark brown or rarely light brown towards the base, to c. 22 cm long. Culms erect, not easily compressed, dull green to dull blue-green, 60–120 cm high and (1.5–)2.0–3.0(–4.0) mm diam.; striations 30–60, regularly spaced, moderately strongly raised; pith interrupted throughout, usually with large air spaces, very rarely continuous (if so then moderately dense); stomates sunken in pits. Inflorescence with flowers aggregated into one to many ± sub-globular clusters, the clusters close or distant; primary bract continuous with culm, to c. 30 cm long; prophylls present. Tepals stramineous or with a faint reddish-brown longitudinal band on either side of the stramineous midrib, 2.2–3.0 mm long; stamens 3–4, anthers 0.5–0.8 mm long. Capsule stramineous with a golden-brown apex, shorter than, equal to, or very rarely exceeding the tepals, 2.0–3.0 mm long. Flowers mostly Oct.–Feb., seeds shed mostly Dec.–Apr.

CVU, DunT, EGL, EGU, GipP, Gold, GGr, HFE, HNF, HSF, MonT, MuF, NIS, OtP, OtR, SnM, Strz, VAlp, VRiv, VVP, Wim. Also SA, NSW, ACT, Tas. New Zealand. Occurs in wet depressions and along drainage lines from sea-level to the subalps.

Closely resembles Juncus amabilis and J. flavidus and is distinguished by the characters provided in the key. Juncus australis also resembles J. gregiflorus, but differs in its more open habit, dull culms, stomates sunken in pits, acuminate tepals (the tips of which are easily broken) and usually paler, obtuse capsules. Hybrids with J. subsecundus and J. flavidus are known.

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 australis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Juncus australis in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Fans present native
Gippsland Plain present native
Otway 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