Diuris palustris Lindl.

Swamp Diuris

Gen. Sp. Orchid. Pl. 507 (1840) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: vulnerable (v); listed in Flora and Fauna Guarantee Act 1988

Flowering plant slender, 6–15 cm tall. Leaves 8–15, narrow, sub-terete, 2–8 cm long, channelled, usually twisted, in a loose, erect tussock, base crimson. Flowers porrect or nodding, 1–4, yellow, spotted or blotched with dark brown, darker on outer surface, faintly spice-scented; pedicel (excluding ovary) 2–5 cm long, slender, mostly enclosed within bract; dorsal sepal erect, recurved in upper part, ovate, 7–10 mm long, purple or dark brown behind anther, yellowish elsewhere; lateral sepals parallel, deflexed, linear, 12–15 mm long, green; petals obliquely erect or recurved, 7–10 mm long, claw dark red-brown, lamina ovate, often notched, yellow, usually with dark brown vertical stripe on back. Labellum deeply 3-lobed from base, 7–10 mm long, keeled; lateral lobes slightly shorter than mid-lobe, erect, oblong, with rounded teeth at tip, entire elsewhere; mid-lobe spathulate, folded, with 2 fleshy ridges from base to beyond middle, merging into a short ridge which terminates in a rounded swelling at the tip. Column wings higher than anther. Flowers Aug.–Oct.

CVU, GipP, Glep, Gold, GGr, HSF, VVP, WaP, Wim. Also SA, Tas. Scattered throughout western Victoria, frequently in swampy depressions within grassland or open woodland communities, probably now extinct in all former sites near Melbourne.

Known to form hybrids with D. pardina, D. orientis, D. chryseopsis and D. basaltica, the latter known as D. ×fastidiosa.

Source: Entwisle, T.J. (1994). Orchidaceae. 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: Jeff Jeanes, 2015-02-03
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 palustris in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Diuris palustris in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Highlands-Southern Fall present native

State distribution

Distribution map
State
South Australia
New South Wales
Australian Capital Territory
Victoria
Tasmania