About Prasophyllum parvifolium Lindl.
Prasophyllum parvifolium Lindl., commonly called the autumn leek orchid, is a terrestrial, perennial, deciduous herb that grows from an underground tuber. It produces a single smooth, green, tube-shaped leaf, which measures 100–350 mm (4–10 in) long and around 2 mm (0.08 in) in diameter. Between six and eighteen or more flowers are arranged along a flowering spike that reaches 150–400 mm (6–20 in) in height. The flowers themselves are green and white with red stripes, and are about 10 mm (0.4 in) long and 6–8 mm (0.2–0.3 in) wide. This species has a broad dorsal sepal, while lateral sepals and petals face forwards. Its lateral sepals are not joined to each other, and the labellum curves strongly upwards between the two lateral sepals. Flowering takes place from June to August. The autumn leek orchid is common in heath, woodland and forest habitats, growing between Eneabba and Manjimup in south-west Western Australia. It occurs within the Avon Wheatbelt, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions.
