Calochilus imberbis R.S.Rogers

Naked Beard-orchid

Trans. & Proc. R. Soc. South Australia 51: 4 (1927) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: rare (r)

Flowering plant 22–45 cm tall, stout. Leaf linear-lanceolate, 15–40 cm long, usually shorter than raceme, keeled, somewhat fleshy. Stem bracts 1–3. Flowers green and purple, 1–4; subtending bract oblong-lanceolate to ovate-lanceolate, tapering to fine point, shorter or longer than flower; pedicel (excluding ovary) 1–2 cm long; dorsal sepal erect, broadly ovate, c. 15 mm long, slightly hooded, acute; lateral sepals ovate, as long as dorsal sepal but narrower, divergent, spreading below or at side of labellum; petals spreading, ovate, slightly asymmetric, about half as long as sepals, yellowish with dark markings. Labellum ovate, 11–15 mm long, resembling-sepals, margins entire, concave and incurved, with conspicuous purplish nerves; glands, papillae and hairs absent. Column short, widely winged, with a purple gland at the base of each wing, the glands connected by a ridge.

CVU, EGL, GipP, Gold, HSF, OtP, OtR, VVP. Also SA, NSW, Tas. Flowers Oct.-Dec.

Coextensive with C. robertsonii but much rarer and occurring as odd individuals within populations of that species. Possibly merely a peloric form of C. robertsonii in which the labellum remains undifferentiated.

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, 2014-10-31
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Asparagales
family Orchidaceae
genus Calochilus
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Calochilus imberbis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Calochilus imberbis in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present native
Gippsland Plain present native
Otway Plain present native
Goldfields present native
Central Victorian Uplands present native
East Gippsland Lowlands present native
Highlands-Southern Fall present native
Otway Ranges present native

State distribution

Distribution map
South Australia
New South Wales