It has a single, tube-shaped leaf and up to fourteen green to greenish-brown flowers and grows in subalpine areas.

[2] Prasophyllum alpinum was first formally described in 1810 by Robert Brown and the description was published in Prodromus Florae Novae Hollandiae et Insulae Van Diemen.

[3][4] The specific epithet (alpinum) is a Latin word meaning "of high mountains".

[5] Prasophyllum colensoi from New Zealand and P. tadgellianum and P. sphacelatum from mainland Australia were formerly included with P.

[2] The alpine leek orchid is common in grassland and herbfields in moist areas above 650 m (2,000 ft) south of Cradle Mountain.