Prasophyllum campestre, commonly known as the sandplain leek orchid, is a species of orchid endemic to eastern Australia. It has a single tubular, yellowish-green leaf and up to twenty greenish, strongly scented flowers with red, purplish, brown or white marks. It grows in the drier parts of Queensland, New South Wales and Victoria.
Prasophyllum campestre is a terrestrial, perennial, deciduous, herb with an underground tuber and a single tube-shaped, yellowish-green leaf. The leaf has a reddish base and is long and in diameter at the base. Between ten and twenty, highly fragrant flowers are widely spaced along a flowering spike tall. The flowers are greenish with red, purplish, brown or white marks and are wide. As with others in the genus, the flowers are inverted so that the labellum is above the column rather than below it. The sepal is lance-shaped, long and about wide. The sepals are long and about wide, free from each other and spread widely apart at their ends. The petals are linear, long and about wide. The labellum is lance-shaped to egg-shaped, long, about wide with the outer end turned upwards at 90ð and wavy edges. There is a fleshy, greenish callus in the centre of the labellum. Flowering occurs from September and October.
Prasophyllum campestre was first formally described in 1991 by Robert Bates and David Jones from a specimen collected near Nymagee and the description was published in Australian Orchid Research. The specific epithet (campestre) is a Latin word meaning "of or pertaining to fields", referring to the habitat of this species.
The inland leek orchid grows in semi arid areas in fertile, water-retaining soil. It occurs in inland areas of southern Queensland, New South Wales and northern Victoria.