Corybas diemenicus (Lindl.) Rchb.f.

Veined Helmet-orchid

Beitr. Syst. Pflanzenk. 67 (1871)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Leaf circular to cordate, sometimes 3-lobed, green above, frosty underneath, 15–27 mm long, 13–31 mm wide. Flower reddish-purple with white central patch, pedicel (excluding ovary) c. 2 mm long; dorsal sepal dark reddish, broadly oblong-obovate, narrowly contracted at base, hooded, covering labellum and extending beyond it, c. 2 cm long when flattened out; lateral sepals linear, tapered, fused at expanded base, directed more or less horizontally forward, c. 4 mm long; petals narrowly falcate, wider and shorter than lateral sepals and attached to them at the base, usually directed forwards, c. 2–3 mm long, tips sometimes forked. Labellum 15–20 mm long when flattened out, tube erect, longer than lamina, auricles wide and opening downwards; lamina acutely recurved, expanded into trumpet-shaped orifice, crimson-streaked along veins with reddish hairs in front of boss, margins coarsely toothed and directed forwards; central boss white, conspicuous, convex (not channelled); callus entire. Column not winged. Flowers Jul.–Sep.

Brid, CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HNF, HSF, NIS, Strz, VRiv, VVP, WaP, WPro. Also SA, NSW, Tas. Widespread in cool, shaded habitats and often forming extensive colonies under coastal scrubs and woodlands or in moist rocky areas, often on sandy soils.

A late-flowering variant from southern Victoria west from Wilsons Promontory, growing under Leptospermum lanigerum, has the labellum auricles covered by the labellum and may be a distinct species (see C. sp. aff. diemenicus (Coastal)).

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, 2015-02-17
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Asparagales
family Orchidaceae
genus Corybas
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Corybas diemenicus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Corybas diemenicus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Glenelg Plain present native
Bridgewater present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Gippsland 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
Strzelecki Ranges present native

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory