It grows in the south-east of South Australia and in a single location in western Victoria.

Prasophyllum nitidum is a terrestrial, perennial, deciduous, herb with an underground tuber and a single tube-shaped, shiny, green leaf which is 100–250 mm (4–10 in) long and 3–4 mm (0.1–0.2 in) wide near its maroon-tinged base.

[2][3] Prasophyllum nitidum was first formally described in 2017 by David Jones and Robert Bates and the description was published in Australian Orchid Review from a specimen collected in the Desert Camp Conservation Park.

[1] The specific epithet (nitidum) is a Latin word meaning "shining", "glittering" or "bright",[4] referring to the shiny flowers.

[2] The shining leek orchid mostly grows in woodland on fertile plains in the mid to upper south-east of South Australia and near Edenhope in far western Victoria.