Pterostylis bracteata is a species of flowering plant in the orchid family Orchidaceae and is endemic to the northern Flinders Ranges in South Australia. It has a rosette of leaves at its base and 2 to 5 translucent white flowers with prominent maroon or lead-coloured markings with a green insect-like labellum with bristly hairs.
Pterostylis bracteata is a terrestrial, perennial, deciduous, herb with an underground tuber and that often grows in clumps. It has a rosette of between 5 and 9 overlapping egg-shaped to elliptical leaves at the base, but are usually withered before flowering. The leaves are long, wide and finely wrinkled. Two to five translucent white, green and maroon or lead-coloured flowers are borne on a flowering stem tall, each flower on a curved pedicel about long with papery bracts long at the base. The dorsal sepal and petals form a hood or "galea" over the column with the dorsal sepal forming a hood long and about wide. The lateral sepals turn downwards, as wide as the galea long and wide which narrow to thread-like tips long, curved forward and spread apart from each other. The labellum is dark maroon to black and insect-like, about long and wide and covered with hairs up to long. Flowering occurs in late September and October.[1]
This species was first formally described in 2017 by David Jones and Robert Bates who gave it the name Oligochaetochilus bracteatus, from a specimen collected by Bates in the southern Flinders Ranges in 2013 and the description was published in Australian Orchid Review.[2] In 2019, Julian Shaw transferred the species to the genus Pterostylis as P. bracteata.[3] The specific epithet (bracteata) means "bracteate" or "bearing bracts", referring to the many stem-clasping bracts on the flowering stem.
Pterostylis bracteata grows under river red gums (Eucalyptus camaldulensis) and native pines in the northern Flinders Ranges of South Australia.