Fisch's greenhood (Pterostylis fischii)
Description
Pterostylis fischii is a terrestrial, perennial, deciduous, herb with an underground tuber and when not flowering, a rosette of egg-shaped leaves, each leaf 5-18 mm long and 6-12 mm wide. Flowering plants have a single flower 20-25 mm long and 7-9 mm wide borne on a flowering stem 150-250 mm high with between three and five stem leaves wrapped around the stem. The flowers are green, white and brown. The dorsal sepal and petals are fused, forming a hood or "galea" over the column. The dorsal sepal curves forward and downward with a thread-like tip 5-15 mm long. The lateral sepals are held closely against the galea, have an erect, thread-like tip 15-30 mm long and a broad V-shaped sinus between their bases. The labellum is 8-9 mm long, 3-4 mm wide, dark brown, blunt, and not visible in an intact flower. Flowering occurs from February to May.
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: Pterostylis
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