Pterostylis aenigma (Pterostylis aenigma)
Description
Pterostylis aenigma has a rosette of between three and eight dark green, fleshy, flat leaves, each leaf 40–60 mm (1.6–2.4 in) long and 15–18 mm (0.6–0.7 in) wide. A single green and white flower is borne on a flowering spike 150–300 mm (6–10 in) high. The flowers are 40–45 mm (1.6–1.8 in) long, 14–18 mm (0.6–0.7 in) wide and lean forward or "nod". The dorsal sepal and petals are joined and curve forward forming a hood over the column. The dorsal sepal is longer than the petals and has a pointed tip. The tip of the hood is brownish. There is a notch in the sinus between the lateral sepals and a large gap between the lateral sepals and petals. The lateral sepals are olive brown and have thread-like tips 25–35 mm (0.98–1.4 in) long. The labellum protrudes through the sinus and is 18–21 mm (0.7–0.8 in) long, about 4 mm (0.2 in) wide, curved, dark brown and blunt. Flowering occurs between November and December
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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