It has a single, tubular leaf and up to twenty five scented, pale green flowers with reddish markings and is only known from a swamp in the north-east of the state.

The labellum is white, pink or mauve, 6–7 mm (0.2–0.3 in) long, curves sharply upwards near its middle and the upturned part has irregular edges.

[2] Prasophyllum uvidulum was first formally described in 2009 by David Jones and Dean Rouse from a specimen collected near Shelley and the description was published in The Orchadian.

[1] The specific epithet (uvidulum) is the diminutive form of the Latin word uvidus meaning "damp", "moist" or "humid".

[2] This orchid species is only known from about 20 plants at the type location and is listed as "Threatened" in the Victorian Government Flora and Fauna Guarantee Act 1988.