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Thelymitra circumsepta Fitzg.
Family Orchidaceae
Common name: Naked Sun-orchid, Naked Sun Orchid

Thelymitra circumsepta Fitzg. APNI*

Synonyms: Thelymitra retecta Rupp APNI*

Description: Terrestrial herb.

Leaf lanceolate, to 20 cm long and 12 mm wide, ribbed, thick to leathery, erect, dark green.

Inflorescence to 60 cm high, 3–10-flowered. Perianth segments to 12 mm long and 5 mm wide, narrow-triangular (opening tardily), greenish white or pale blue-lilac. Column about 5 mm long, white to pink, some flowers with a stalked brushy appendage on the basal rim (varying in length in different flowers on same inflorescence). Midlobe with a few coarse, blunt calli; accessory lobes lying flat against the anther, deeply fringed to toothed, reddish. Lateral arms erect with yellowish tufts.


Illustration
I.Bowden

Flowering: Dec.–Jan.

Distribution and occurrence: Grows in mountainous districts with high rainfall and in seepage areas on tablelands, often inconspicuous among shrubs and tussocks; south from the New England Tablelands.
NSW subdivisions: NC, CC, SC, NT, CT, ST
Other Australian states: Vic. Tas. S.A.
AVH map***

Plants with flowers lacking the appendage on the rim were known as T. retecta.

Text by P. Bernhardt
Taxon concept: Flora of NSW 4 (1993)


APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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