Diuris gregaria D.L.Jones

New Taxa Austral. Orch. (Austral. Orchid Res.) 5: 79, 80 (2006) APNI

Taxonomic status:Accepted

Occurrence status:Endemic

Establishment means:Native

Threat status:Victoria: endangered (e); listed in Flora and Fauna Guarantee Act 1988

Flowering plant slender, 10–20 cm tall, often in densely crowded tufts of up to 30 plants. Leaves mostly 3–7, linear, 5–10 cm long, in a loose, erect tussock. Flowers 1 or 2, semi-erect to porrect, often not opening widely, bright yellow, with a few short dark striations on the base of the dorsal sepal and sometimes also the labellum; pedicel (excluding ovary) 1–2.5 cm long, very slender, partly enclosed within bract; dorsal sepal obliquely erect or porrect, ovate, 7–12 mm long; lateral sepals obliquely deflexed, usually parallel, linear-oblanceolate, 14–18 mm long, green; petals incurved to spreading, 8–12 mm long, claw green, lamina ovate to ovate-elliptic. Labellum porrect or obliquely deflexed, 10–17 mm long, 3-lobed; lateral lobes small, oblong-cuneate, outer margins toothed; mid-lobe flat or shallowly concave, c. 3 times as long as the lateral lobes, ovate to broadly ovate, narrowed at base, with 2 widely separated, pubescent, longitudinal ridges extending shortly beyond base, a single, less distinct ridge continuing nearly to apex. Column wings about same height as anther. Flowers Sep.–Oct.

DunT, GGr, VVP, Wim. Extremely rare, mostly on basalt plains grasslands of western Victoria.

This endangered species has lost most of its habitat to farming and agriculture.

Rare hybrids between Diuris gregaria and D. palustris yield plants indistinguishable from D. ×fastidiosa. See also notes under D. chryseopsis.

Created by: Jeff Jeanes, 2015-01-23
Updated by: Val Stajsic, 2018-02-16
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Asparagales
family Orchidaceae
genus Diuris
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Diuris gregaria in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Diuris gregaria in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Victorian Volcanic Plain present native
Greater Grampians present native
Dundas Tablelands present native

State distribution

Distribution map
State
South Australia
Victoria