Forest leek orchid (Prasophyllum sylvestre)
Description
Prasophyllum sylvestre is a terrestrial, perennial, deciduous, herb with an underground tuber and a single bright green, tube-shaped leaf, 160–400 mm (6–20 in) long and 3–4 mm (0.1–0.2 in) wide with a red base. Between five and thirty flowers are well-spaced along a flowering spike about 40–90 mm (2–4 in) long. The flowers are pale green, pink and reddish-brown, 3–4 mm (0.1–0.2 in) wide and lightly scented. 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 linear to egg-shaped, 7–10 mm (0.3–0.4 in) long and about 2.5 mm (0.1 in) wide. The lateral sepals are linear to lance-shaped, 7–10 mm (0.28–0.39 in) long, about 2 mm (0.08 in) wide and joined for about half their length. The petals are linear, to narrow lance-shaped, 6–7 mm (0.2–0.3 in) long and about 1 mm (0.04 in) wide. The labellum is pink or white, oblong to egg-shaped, 6–9 mm (0.2–0.4 in) long, 2–3 mm (0.08–0.1 in) wide and turns sharply upwards with slightly wavy edges. Flowering occurs from late October to early December and is usually triggered by fire or other light disturbance.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Tracheophyta
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Class: Liliopsida
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Order: Asparagales
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Family: Orchidaceae
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Genus: Prasophyllum
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