Juncus planifolius R.Br.

Broad-leaf Rush

Prodr. 259 (1810) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Tufted, sometimes shortly stoloniferous annual or short-lived perennial, with or without short rhizomes. Culms erect, 2–60 cm high, usually exceeding leaves, minutely papillose. Leaves mostly basal; blade flat to slightly channelled, to c. 40 cm long, 1–11 mm wide, apex acute; sheaths usually reddish, broader than blades; auricles absent. Inflorescence often umbel-like, with a sessile or subsessile cluster of flowers, and an additional 1–50 (rarely more) clusters terminating branches of variable length; clusters with up to c. 40 flowers, expanding to 0.4–0.8 cm diam. in fruit; primary bract usually leaf-like, generally shorter than inflorescence; prophylls absent. Tepals with pale or brownish membranous sides; the outer 1.5–2.5 mm long, acute-acuminate; inner equal to outer, obtuse; stamens 3, very rarely 4–6, anthers 0.3–0.6 mm long. Capsules reddish-brown, ovoid, c. 1.6–2.5 mm long, obtuse and shortly mucronate, subequal to tepals; seeds c. 0.3–0.4 mm long, with very fine longitudinal and transverse ridges discernible at high magnification, minutely apiculate at one or both ends. Flowers mostly Sep.–Feb., seeds shed mostly Oct.–Jun.

CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HFE, HNF, HSF, LoM, MonT, MuM, NIS, OtP, OtR, SnM, Strz, VAlp, VRiv, VVP, WaP, WPro, Wim. All States except NT. New Zealand, Chile, Hawaii. Widespread in Victoria, occurring in both disturbed and undisturbed damp sites, e.g. swamps, creeks, paddocks and roadside ditches.

Sometimes mistaken for a species of Luzula, but is readily distinguished by its strictly glabrous leaves. Diminutive annual forms from the north-western part of the species range somewhat resemble Juncus antarcticus. In addition to the characters given in the key, J. planifolius has smaller seeds 0.3–0.4 mm long (0.4–0.5 mm long in J, antarcticus), and minutely papillose culms. Juncus planifolius is also close to J. caespiticius, but see key.

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, 2017-12-06
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 planifolius in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Juncus planifolius in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Victorian Riverina 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
South Australia
New South Wales
Australian Capital Territory