Pterostylis ziegeleri, commonly known as the Cape Portland greenhood, is a plant in the orchid family Orchidaceae and is endemic to Tasmania.

[3][4][5] Pterostylis ziegeleri was first formally described in 1998 by David Jones from a specimen collected near Cape Portland and the description was published in Australian Orchid Research.

[1] The specific epithet (ziegeleri) honours David Ziegler "who prepared the initial manuscript of the Orchid Atlas of Tasmania.

[3] The Cape Portland greenhood grows in dense, tall, tussock grassland in coastal areas and in the midlands.

[6] The main threats to the species are land clearing for agriculture or development, application of fertilisers and inappropriate fire or grazing/slashing regimes.