Citation: R. Br., Prod. Fl. Nov. Holl. 314 (1810).

Synonymy: Not Applicable

Common name: Veined sun-orchid.

Description:
Plant 15-70 cm high, often gregarious; leaf linear, fleshy, roundly thickened on the margins and keel and so more or less trefoil-shaped in transverse section; often extending beyond the middle of the scape; stem more or less sinuous.

Flowers 1-5, on long slender pedicels, blue, rarely white or pink; perianth-segments rather thin, conspicuously striped with darker blue veins, less commonly without; sepals longer than the petals, 12-15 mm long; labellum differentiated, broadly obovate, the anterior margins crisped, sometimes slightly crenate towards the tip or mucronate; column erect, c. 5 mm long, not cucullate; column-arms produced into blunt erect more or less ribbon-like appendages, tending to twist through a half to one and a half turns of a loose spiral, tips sometimes unevenly notched, not ciliate or roughened; post-anther lobe lacking; anther very protuberant, bent forward, overhanging the stigma, almost fully exposed, ending in 2 short horn-like anther points; a narrow band of clear blister-like crowded calli across the back of the anther between the bases of the column-arms and sometimes extending up their lower margins; pollinia not connected with the rostellum; stigma placed obliquely below the anther, its upper margin bicuspidate, flowers autogamous.

Published illustration: Cady & Rotherham (1970) Australian native orchids in colour, pl. 21; Clyne (1970) Australian ground orchids, p. 79; Pocock (1972) Ground orchids of Australia, pl. 148; Woolcock (1984) Australian terrestrial orchids, pl. 71C.

Distribution:  Forms colonies in open places in peaty bogs.   N.S.W.; Vic.; Tas.   New Zealand; New Caledonia. Conservation status: native Flowering time: Nov. — Dec.

SA Distribution Map based on current data relating to specimens held in the State Herbarium of South Australia

Biology: A putative hybrid has been recorded with T. pauciflora and described as T. xcyanea (Lindley) Benth. This putative hybrid has not been collected in S. Aust. Although the parent species occur together they have not been observed flowering at the same time.

Author: Not yet available