Prasophyllum fuscum R.Br.

Plants 200–45
 tall. Free part of leaf to 150 x 4–6mm. Spike 40–12
 long, 10–30-flowered. Ovary shortly stalked, green. Flowers moderately crowded, lightly scented, 10–13 x 5–8mm, greenish-brown to reddish-brown, petals with pale margins, labellum pink to purple, callus greenish. Dorsal sepal 9–10 x 3.5–4mm, pointed, decurved. Lateral sepals free, 9.5–10 x 2mm, erect and recurved, parallel, pointed. Petals 7.5–8 x 1.8mm, porrect to spreading, pointed. Labellum sessile, ovate-lanceolate, 8–9 x 4.5–5mm, sharply recurved and constricted near middle, ending in tapered tail c.4.
 long, margins entire or slightly crinkled. Callus shiny, channelled with prominently raised wing-like irregular margins, ending well before labellum apex. Column c.3 x 3mm, with wings c.3.
 long. Pollinarium with long hamulus.

Known from only a single locality, growing among scattered shrubs and tussocks in moist to wet grassy sites and among reeds, sedges and rushes around margins of an upland peat swamp in heavy brown to black peaty soil over sandstone. Leek orchid population threatened by mining and catastrophic slump following heavy rains in 1998 which washed away much of the peat, leading to drying of swamp and weed infestation.