Northern greenhood | |
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Scientific classification
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Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Order: | Asparagales |
Family: | Orchidaceae |
Subfamily: | Orchidoideae |
Tribe: | Cranichideae |
Genus: | Pterostylis |
Species: | P. stricta
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Binomial name | |
Pterostylis stricta |
Pterostylis stricta, commonly known as the northern greenhood, is a species of orchid endemic to Queensland. It has a rosette of leaves and when flowering a single translucent white flower with green lines, a reddish-brown tip and a curved, protruding labellum.
Pterostylis stricta is a terrestrial, perennial, deciduous, herb with an underground tuber and a rosette of wrinkled leaves. Each leaf is 15–60 mm (0.6–2 in) long and 10–20 mm (0.4–0.8 in) wide. When flowering, there is a single white flower with green lines and a reddish-brown tip, 20–25 mm (0.8–1 in) long and 10–12 mm (0.4–0.5 in) wide which is borne on a flowering spike 100–300 mm (4–10 in) high. The dorsal sepal and petals are fused to form a hood or "galea" over the column, the dorsal sepal about the same length as the petals, all with a sharp point. There is a wide gap at each side of the flower between the petals and lateral sepals. The lateral sepals are erect with a tapering tip 12–15 mm (0.5–0.6 in) long and there is a broad, bulging sinus between them. The labellum is 14–16 mm (0.55–0.63 in) long, about 4 mm (0.2 in) wide, dark reddish-brown and curved, protruding above the sinus. Flowering occurs from March to July. [2] [3]
Pterostylis stricta was first described in 1972 by Stephen Clemesha and Bruce Gray and the description was published in The Orchadian from a specimen collected near Ravenshoe. [4] The specific epithet (stricta) is a Latin word meaning "draw together", "hold in check" or "bind". [5]
The northern greenhood grows with grasses and in sheltered gullies in forest between Mount Finnigan and Paluma at altitudes of between 800 and 1,250 m (2,600 and 4,100 ft). [2] [3]
Northern greenhood | |
---|---|
Scientific classification
![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Order: | Asparagales |
Family: | Orchidaceae |
Subfamily: | Orchidoideae |
Tribe: | Cranichideae |
Genus: | Pterostylis |
Species: | P. stricta
|
Binomial name | |
Pterostylis stricta |
Pterostylis stricta, commonly known as the northern greenhood, is a species of orchid endemic to Queensland. It has a rosette of leaves and when flowering a single translucent white flower with green lines, a reddish-brown tip and a curved, protruding labellum.
Pterostylis stricta is a terrestrial, perennial, deciduous, herb with an underground tuber and a rosette of wrinkled leaves. Each leaf is 15–60 mm (0.6–2 in) long and 10–20 mm (0.4–0.8 in) wide. When flowering, there is a single white flower with green lines and a reddish-brown tip, 20–25 mm (0.8–1 in) long and 10–12 mm (0.4–0.5 in) wide which is borne on a flowering spike 100–300 mm (4–10 in) high. The dorsal sepal and petals are fused to form a hood or "galea" over the column, the dorsal sepal about the same length as the petals, all with a sharp point. There is a wide gap at each side of the flower between the petals and lateral sepals. The lateral sepals are erect with a tapering tip 12–15 mm (0.5–0.6 in) long and there is a broad, bulging sinus between them. The labellum is 14–16 mm (0.55–0.63 in) long, about 4 mm (0.2 in) wide, dark reddish-brown and curved, protruding above the sinus. Flowering occurs from March to July. [2] [3]
Pterostylis stricta was first described in 1972 by Stephen Clemesha and Bruce Gray and the description was published in The Orchadian from a specimen collected near Ravenshoe. [4] The specific epithet (stricta) is a Latin word meaning "draw together", "hold in check" or "bind". [5]
The northern greenhood grows with grasses and in sheltered gullies in forest between Mount Finnigan and Paluma at altitudes of between 800 and 1,250 m (2,600 and 4,100 ft). [2] [3]