Streaked leek orchid

Prasophyllum striatum is a terrestrial, perennial, deciduous, herb with an underground tuber and a single tube-shaped leaf 70–200 mm (3–8 in) long and about 0.5–1 mm (0.02–0.04 in) in diameter. The free part of the leaf is 25–70 mm (1–3 in) long. Up to ten flowers are arranged on a flowering spike 10–50 mm (0.4–2 in) high. The flowers are 7–8 mm (0.28–0.31 in) long and 4–5 mm (0.16–0.20 in) wide on a short, thin ovary, and as with other leek orchids, are inverted so that the labellum is above the column rather than below it. The dorsal sepal is triangular, greenish with reddish or purplish stripes and is 8–10 mm (0.3–0.4 in) long and about 4 mm (0.2 in) wide. The lateral sepals are a similar size and colour to the dorsal sepal, fused to each other and curve backwards. The petals are whitish with reddish or purplish stripes and are about 8 mm (0.3 in) long and 3 mm (0.1 in) wide. The labellum is white, about 7 mm (0.3 in) long and 3 mm (0.1 in) wide. It curves gently upwards and has wavy edges. There is a raised, creamy-white callus with two parallel ridges in the centre of the labellum and extending almost to its tip. Flowering occurs from March to June.

Striated leek orchid grows in shallow soil on sandstone and near swamps mainly near the coast from Bulahdelah to Nowra but also in the Blue Mountains.

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