Thelymitra orientalis R.J.Bates

J. Adelaide Bot. Gard. 24: 28 (2010) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: endangered (e)

Flowering stem erect, wiry, straight, 7–10 cm tall, c. 1 mm diam., green to purplish. Leaf filiform, terete, 3–5 cm long, 1–2 mm wide, obscurely canaliculate, sheathing at base, green with a purplish base. Inflorescence 1(–2)-flowered. Sterile bracts 2. Perianth segments lanceolate to ovate, 5–7 mm long, deep blue with reddish tones. Column slender, 3–4 mm long, purplish, mid-lobe expanded into hood over the anther, tubular, inflated, narrow at the base, widening abruptly towards the apex, curved, purplish brown, with little or no hoary bloom, apex deeply v-notched, yellow; lateral lobes converging or more or less parallel, 1–2 mm long, digitiform or laterally compressed, porrect or obliquely erect, each with a sparse shaggy toothbrush-like arrangement of cream or yellow hairs embracing the mid-lobe. Anther inserted towards middle of column, shortly beaked. Flowers Oct.–Nov.

DunT, GipP, Glep, GGr, OtP, VVP, Wim. Also SA. Grows in damp heathy flats and seepage areas usually in peaty white sands.

Flowers are self-pollinating and only open on warm, humid days.

Thelymitra orientalis is similar to T. mucida, but the latter is a generally more robust plant with a larger leaf, up to 6 flowers and copious bloom on the mid-lobe of the column.

Created by: Jeff Jeanes, 2014-09-05
Updated by: Val Stajsic, 2018-02-16
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 orientalis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Thelymitra orientalis 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
Otway Plain present native
Greater Grampians present native
Dundas Tablelands present native

State distribution

Distribution map
South Australia