Juncus articulatus subsp. articulatus

Jointed Rush

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Short- or long-rhizomatous perennial, forming tufts or swards, often red-tinged. Culms decumbent, rarely erect, new shoots often arising from nodes, to c. 50 cm high. Leaves arising from culms and creeping stems; blade hollow, with conspicuous transverse septa, usually shorter than culms, terete or slightly compressed, c. 0.5–2 mm wide, apex broadly acute to obtuse; auricles usually obtuse, up to c. 2 mm long. Inflorescence of 4–40(–60) usually discrete clusters, each with 2–13(–25) flowers, 5–9 mm wide when in fruit; primary bract shorter than inflorescence; prophylls absent. Tepal midrib green, soon becoming strongly reddish-brown, margins pale; outer tepals 2–3 mm long, acute; inner equal to or slightly shorter than outer, acute or obtuse; stamens 6, anthers 0.5–0.9 mm long. Capsules dark brown or red-brown to almost black (at least in upper half), occasionally dark golden-brown, trigonous-ovoid, 2.5–4 mm long, exceeding tepals, tapering gradually or contracted rather abruptly to a distinct mucro to c. 0.8 mm long; seeds 0.4–0.6 mm long, slightly asymmetrical, finely reticulate-patterned discernible at moderately high magnification, minutely apiculate at each end. Flowers mostly Nov.–Mar., seeds shed mostly Dec.–Jun.

*CVU, *DunT, *EGL, *EGU, *GipP, *Glep, *Gold, *GGr, *HNF, *HSF, *MonT, *MuF, *NIS, *OtP, *OtR, *SnM, *Strz, *VAlp, *VRiv, *VVP, *WaP, *WPro, *Wim. A common weed of creeks, rivers, swamps, irrigation channels, moist pastures and other soakage areas at a range of altitudes throughout Victoria.

Some authors (e.g. Snogerup 1980) report tepal lengths of up to 3.5 or 4 mm for Juncus articulatus. Of the numerous specimens examined here, none were found to have tepals exceeding 3 mm.

Created by: Andre Messina, 2016-08-04
Updated by: Val Stajsic, 2018-06-15
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Juncaceae
genus Juncus
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Juncus articulatus subsp. articulatus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Juncus articulatus subsp. articulatus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present naturalised
Glenelg Plain present naturalised
Victorian Volcanic Plain present naturalised
Victorian Riverina present naturalised
Murray Fans present naturalised
Gippsland Plain present naturalised
Otway Plain present naturalised
Warrnambool Plain present naturalised
Goldfields present naturalised
Central Victorian Uplands present naturalised
Greater Grampians present naturalised
Dundas Tablelands present naturalised
Northern Inland Slopes present naturalised
East Gippsland Lowlands present naturalised
East Gippsland Uplands present naturalised
Wilsons Promontory present naturalised
Highlands-Southern Fall present naturalised
Highlands-Northern Fall present naturalised
Otway Ranges present naturalised
Strzelecki Ranges present naturalised
Monaro Tablelands present naturalised
Victorian Alps present naturalised
Snowy Mountains present naturalised