Thelymitra gregaria
D.L.Jones & M.A.Clem.Flowering stem erect, straight, 9–20 cm tall, 1–2.5 mm diam., purplish, often pruinose. Leaf linear to linear-lanceolate, attenuate, 5–12(–18) cm long, 5–12 mm wide, fleshy, canaliculate, ribbed abaxially, sheathing at base, dark green to yellowish with a purplish base. Inflorescence 1–6-flowered, loose. Sterile bracts usually 2, rarely 1 or 3. Perianth segments elliptic, lanceolate or ovate, 10–20 mm long, dark violet-blue to purple with darker longitudinal veins. Column slender, 5–7 mm long, pink, blue or purplish; mid-lobe hooding the anther, tubular, inflated, gently curved through c. 90 deg., dark brown to blackish, apex shallowly bilobed, yellow; lateral lobes converging 0.8–1.5 mm long, digitiform, obliquely erect, each with a toothbrush-like arrangement of white hairs almost along their entire length, terminating in front of mid-lobe. Anther inserted towards apex of column, shortly beaked. Flowers Sep.–Nov.
VVP, OtP, CVU, DunT, HSF. Endemic to Victoria where found in tussock grassland on red-brown loams derived from basalt.
Flowers expand readily on warm to hot days and are strongly scented.
Apparent hybrids with T. exigua and with T. antennifera have been observed where the species are sympatric.