Thelymitra improcera D.L.Jones & M.A.Clem.

Contr. Tasmanian Orchid. 8 (Austral. Orchid. Res. 3) 187 (1998) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: data deficient (k)

Flowering stem erect, slender, straight, 15–55 cm long, 2–3 mm diam., green to purplish. Leaf linear to linear-lanceolate, attenuate, 10–25 cm long, 5–12 mm wide, fleshy, canaliculate, ribbed abaxially, sheathing at base, dark green with a purplish base. Inflorescence 1–6-flowered. Sterile bracts usually 2, rarely 1 or 3. Flowers pale blue; perianth segments ovate to lanceolate, 10–15 mm long. Column cylindric to quadrangular, 3–5 mm long, cream to pale blue; mid-lobe slightly hooding, 0.5–1 mm long, c. 1 mm wide, yellow with a black subapical collar, apex with a 1–few rows of rounded calli; auxiliary lobes 0.5–1 mm long, converging, more or less rectangular to quadrate, fleshy, porrect or obliquely erect, apex toothed or warty, yellow; lateral lobes 1.5–2 mm long, oblong, porrect or obliquely erect, apical margins with a toothbrush-like arrangement of white hairs. Anther inserted near middle of column, with a slender incurved beak protruding below the lateral lobes. Flowers Oct.–Dec.

EGL, EGU, GipP. Also Tas. Grows in near-coastal heathland and heathy woodland in low-lying moist areas on sandy loams and peaty loams.

Thelymitra improcera has been confused with T. media, but can be distinguished by its generally earlier flowering season, less robust nature, smaller flowers and usually shorter lateral lobes on the column.

Flowers open freely in warm to hot weather and are self-pollinating.

Created by: Jeff Jeanes, 2014-09-23
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 improcera in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Thelymitra improcera in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Gippsland Plain present native
East Gippsland Lowlands present native
East Gippsland Uplands present native

State distribution

Distribution map