It has a single leathery leaf and up to ten yellowish green flowers with brownish spots, blotches and patterns.

Between two and ten greenish yellow flowers with brownish spots, blotches and patterns, 30–40 mm (1.2–1.6 in) wide are borne on a flowering stem 200–400 mm (8–20 in) tall.

[2][3][4][5][6][7] Thelymitra benthamiana was first formally described in 1871 by Heinrich Gustav Reichenbach and the description was published in Beitrage zur Systematischen Pflanzenkunde.

[5] The leopard sun orchid is widespread and common, growing in heath and forest.

It is found in Western Australia between Geraldton and Israelite Bay, in southern and western Victoria, in south-eastern South Australia and on Flinders Island in Tasmania.