It has a single fleshy, grass-like leaf and up to ten dark azure blue flowers with darker veins.

Thelymitra media is a tuberous, perennial herb with a single erect, fleshy, channelled, dark green, linear leaf 100–270 mm (4–10 in) long, 3–8 mm (0.1–0.3 in) wide and folded lengthwise.

The lobe on the top of the anther is short and dark purplish with a toothed or warty yellow tip.

Rogers and the description was published in Transactions and Proceedings of the Royal Society of South Australia.

[5] The azure sun orchid grows in heath and forest in western Victoria and south-eastern South Australia, including Kangaroo Island.