Thelymitra xanthotricha is a tuberous, perennial herb with a single erect, fleshy, channelled, dark green, linear to lance-shaped leaf 100–300 mm (4–10 in) long and 5–10 mm (0.2–0.4 in) wide with a purplish base.

The lobe on the top of the anther is dark brown with a yellow tip, tube-shaped and inflated with a notched end.

The side lobes curve gently upwards and have toothbrush-like tufts of creamy yellow hairs.

[5][7] The yellow tufted sun orchid grows with shrubs and sedges and is found between Perth and Brookton and between Esperance and Condingup.

[3][4][8] Thelymitra xanthotricha is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.