Pterostylis tunstallii (Pterostylis tunstallii)
Description
Pterostylis tunstallii, is a terrestrial, perennial, deciduous, herb with an underground tuber. Non-flowering plants have a rosette of between three and five egg-shaped leaves on a stalk 30–60 mm (1–2 in) long, each leaf 10–40 mm (0.4–2 in) long and 4–9 mm (0.2–0.4 in) wide. Flowering plants have up to ten transparent green flowers on a flowering spike 150–500 mm (6–20 in) high. The flowering spike has between five and eight stem leaves which are 30–60 mm (1–2 in) long and 3–5 mm (0.1–0.2 in) wide. The flowers are 7–10 mm (0.3–0.4 in) long, 5–7 mm (0.2–0.3 in) wide. The dorsal sepal and petals are fused, forming a hood or "galea" over the column with the dorsal sepal having a short point on its tip. The lateral sepals turn downwards, are 7–10 mm (0.3–0.4 in) long, 5–7 mm (0.2–0.3 in) wide, joined for most of their length and have a narrow tip about 4 mm (0.2 in) long which is brown on its end. The labellum is insect-like, about 5 mm (0.2 in) long, 2 mm (0.08 in) wide and dark brown with a blackish "head" end. Flowering occurs from July to August
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: Pterostylis
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