Juncus thompsonianus L.A.S.Johnson

Aspects of Tasmanian Botany 45 (1991) APNI

Taxonomic status:Accepted

Occurrence status:Extinct

Establishment means:Native

Threat status:Victoria: extinct (x)

Long-rhizomatous, sward-forming perennial. Culms erect or decumbent, new shoots often arising from nodes and creeping stems, to c. 3 cm high. Leaves arising from culms and creeping stems; blade hollow, with inconspicuous transverse septa, usually longer than culms, terete or slightly compressed, c. 0.3–0.7(–1) mm wide, apex acute; auricles acute or obtuse, to c. 0.5 mm long. Inflorescence a single cluster (rarely with a second cluster) composed of 1–3 flowers, to c. 3 mm wide in fruit; primary bract longer than inflorescence; prophylls absent. Tepal midrib green (occasionally reddish tinged) when young, margins broad, membranous; outer tepals 1.8–2.3 mm long, ovate, acute; inner slightly longer and narrower than outer, acute or obtuse; stamens 6, anthers 0.5–0.8 mm long. Capsules pale golden brown, ovoid, c. 2.3–2.5 mm long, slightly exceeding tepals at maturity, contracted rather abruptly to an acuminate apex; seeds 0.5–0.7 mm long, finely reticulate-patterned at moderately high magnification, minutely apiculate at each end. Flowers probably Nov.–Jan., seeds shed Dec.–Mar.

Also NSW. ACT. Known in Victoria only by a single collection (1928) from the vicinity of Mt Fainter (Bogong High Plains), presumably in a moist or boggy situation and now perhaps extinct at this site.

The Victorian specimen is very similar to the Tasmanian endemic Juncus curtisiae.

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 thompsonianus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Juncus thompsonianus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Alps extinct native

State distribution

Distribution map
New South Wales