Pterostylis alpina, commonly known as the mountain greenhood,[2] is a species of orchid endemic to south-eastern Australia.

It has a rosette of fleshy leaves at the base and usually only one white flower with green markings and back-swept lateral sepals.

Pterostylis alpina is a terrestrial, perennial, deciduous, herb with an underground tuber and a rosette of three to five leaves surrounding the base of the flowering stem.

[2][3][4][5] Pterostylis alpina was first formally described in 1915 by Richard Rogers and the description was published in Proceedings of the Royal Society of Victoria.

[7] The mountain greenhood is widespread in northern and eastern Victoria but is restricted to the Batlow region in New South Wales.