Thelymitra ×chasmogama R.S.Rogers

Globe-hood Sun-orchid

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

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: vulnerable (v)

Flowering stem erect, slender, 17–40 cm long, c. 2 mm diam., more reddish than green. Leaf linear, attenuate, 13–19(–27) cm long, 3–7 mm wide, canaliculate, green with a reddish base. Inflorescence 1–6-flowered. Sterile bracts usually 2. Perianth segments ovate-lanceolate, similar, 7–15 mm long, pale to slaty pink. Column 4–6.5 mm long, mauve to pinkish; mid-lobe expanded into a short semicircular hood, deeply notched, with yellow tips and a brown-purple subterminal band, ending in the front at the level of the lateral lobes; lateral lobes suberect, flattish, each terminated on the upper side with a pale yellow, vertical hair-tuft. Anther with a blunt beak protruding just below lateral lobes. Flowers Sep.–Nov.

CVU, DunT, Glep, Gold, GGr, VVP, Wim. Also SA. Sporadic in areas where the putative parents T. luteocilium and a member of the T. nuda-pauciflora complex grow together. Flowers late Sep.-early Nov. Occurs sporadically in western Victoria in woodlands, open forests and mallee scrubs and co-extensive with T. luteocilium.

A putative hybrid between T. luteocilium and T. megcalyptra, although plants of similar morphology can arise from the hybridisation of other species. Variable in morphology possibly due to backcrossing with the hybrid parents.

Flowers expand freely on hot, humid days.

Variable in morphology due to backcrossing with the hybrid parents.

Source: Weber, J.Z.; Entwisle, T.J. (1994). Thelymitra. 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: Daniel Ohlsen, 2017-05-30
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Asparagales
family Orchidaceae
genus Thelymitra
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Thelymitra ×chasmogama in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Thelymitra ×chasmogama in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native