Pterostylis taurus (Pterostylis taurus)
Description
Pterostylis taurus is a terrestrial, perennial, deciduous, herb with an underground tuber and a rosette of dull green leaves, each leaf 15–45 mm (0.6–2 in) long and 5–20 mm (0.2–0.8 in) wide. Flowering plants have a similar rosette and a single green, brown and white flower borne on a flowering spike 100–250 mm (4–10 in) high. The flowers are 25–30 mm (0.98–1.2 in) long, 10–13 mm (0.4–0.5 in) wide and lean forward. The dorsal sepal and petals are joined and curve forward forming a hood called the "galea" over the column but the dorsal sepal is longer than the petals and has a pointed tip 2–3 mm (0.08–0.1 in) long. There is a broad U-shaped sinus between the lateral sepals which have thin, erect, thread-like tips 22–30 mm (0.9–1 in) long. The labellum protrudes above the sinus and is 13–16 mm (0.5–0.6 in) long, about 3 mm (0.1 in) wide and curved with a deep notch on the end. Flowering occurs between April and July.
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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