Prasophyllum castaneum (Prasophyllum castaneum)
Description
Prasophyllum castaneum is a terrestrial, perennial, deciduous, herb with an underground tuber and a single tube-shaped, dark green to brownish-green leaf which is 80–400 mm (3–20 in) long and 3–4 mm (0.1–0.2 in) wide with a dark purplish-red base. The free part of the leaf is 100–160 mm (4–6 in) long. Between ten and twenty flowers are arranged along a thin flowering spike 80–120 mm (3–5 in) long. The flowers are chestnut-coloured to dark brown, 14–17 mm (0.6–0.7 in) long and 7–8 mm (0.28–0.31 in) wide. The dorsal sepal is broadly lance-shaped to egg-shaped, 8–9 mm (0.3–0.4 in) long and about 4 mm (0.2 in) wide and curves downwards. The lateral sepals are 8–9 mm (0.3–0.4 in) long, about 3 mm (0.1 in) wide, erect and curve away from each other. The petals are narrow egg-shaped to lance-shaped, 7–8 mm (0.28–0.31 in) long and about 1.5 mm (0.06 in) wide. The labellum is about 7 mm (0.3 in) long and 5 mm (0.2 in) wide, turns upwards at about 90° near its middle, and its edges are slightly wavy. Flowering occurs from late November to January.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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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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