Thelymitra arenaria

Flowering stem erect, straight, 25–40 cm tall, 1.5–4 mm diam., pale green to straw-coloured. Leaf linear-lanceolate, attenuate, 15–30 cm long, 8–18 mm wide, scabrous, leathery, canaliculate, ribbed abaxially, sheathing at base, dark green with a purplish base. Inflorescence 2–12-flowered, open. Sterile bracts usually 2, sometimes 1. Perianth segments elliptic to ovate, (8–)10–15 mm long, rich purplish. Column 4.5–6 mm long, pale blue with darker blue streaks at base; mid-lobe expanded into a hood over the anther, tubular, inflated, curving through c. 90 deg., yellow with a dark brown collar, apex emarginate to shallowly bilobed; lateral lobes converging, 0.8–1.2 mm long, digitiform, porrect at base then bent sharply upwards through 90 deg., each with a toothbrush-like arrangement white hairs terminating below the mid-lobe. Anther inserted towards apex of column, shortly beaked. Flowers Oct.–Dec.