Pterostylis revoluta (Pterostylis revoluta)
Description
Pterostylis revoluta�is a terrestrial,�perennial,�deciduous,�herb�with an underground�tuber�and when not flowering, a�rosette�of between three and seven greyish to bluish, egg-shaped leaves. Each leaf in the rosette is 10�30�mm long and 4�12�mm wide. Flowering plants have a single flower 20�25�mm long, 9�12�mm wide and which lean forwards slightly. The flower is borne on a flowering stem 100�150�mm high with between three and five leaves wrapped around the stem. The flowers are pale green and white with a brown tinge. 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 4�8�mm long. The lateral sepals are held closely against the galea, have an erect, curved thread-like tip 20�25�mm long and a narrow V-shaped sinus between their bases. The labellum is 14�17�mm long, about 3�mm wide, curved, pointed and extends for about half its length above the sinus. Flowering occurs from February to June
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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