Dainty Leek Orchid

Prasophyllum plumiforme is a terrestrial, perennial, deciduous, herb with an underground tuber and a single smooth, tube-shaped leaf which is 200–350 mm (8–10 in) long and 2–3 mm (0.08–0.1 in) in diameter. Between fifteen and fifty or more flowers are moderately crowded on a flowering stem 80–150 mm (3–6 in) long reaching to a height of 300–600 mm (10–20 in). The flowers are cream-coloured to greenish-yellow, about 4 mm (0.2 in) long and wide. As with others in the genus, the flowers are inverted so that the labellum is above the column rather than below it. The dorsal sepal is 4–5 mm (0.16–0.20 in) long and about 2 mm (0.08 in) wide and the lateral sepals are 4–5 mm (0.16–0.20 in) long and about 1 mm (0.04 in) wide and free from each other. The petals are about the same size as the lateral sepals and turn forwards. The labellum is about 4 mm (0.2 in) long, 3.5 mm (0.1 in) wide and turns obliquely upwards near its middle. The edges of the labellum are crinkled and there is a green callus along its centre. Flowering occurs from September to November. This leek orchid resembles P. ovale but is taller and has smaller, less crowded flowers.

The dainty leek orchid is widespread and often common in woodland and shrubland between Kalbarri and Israelite Bay.