Pterostylis depauperata
| Keeled greenhood | |
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| File:LR063 72dpi Pterostylis depauperata.jpg | |
| Drawing of Pterostylis depauperata by Lewis Roberts | |
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P. depauperata
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| Pterostylis depauperata |
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Pterostylis depauperata, commonly known as the keeled greenhood, is a species of orchid endemic to Queensland. Flowering plants have a rosette of leaves at the base of a flowering stem with a single small white flower with pale green marks, and a few small stem leaves. Non-flowering plants only have a rosette of leaves. All three sepals on the flower have relatively long, thread-like tips.
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Description
Pterostylis depauperata is a terrestrial, perennial, deciduous, herb with an underground tuber and which often grows in colonies. Non-flowering plants have a rosette of between three and seven egg-shaped, greyish green leaves lying flat on the ground. Each leaf is Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). long and Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). wide. Flowering plants have a single flower Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). long and Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). wide on a flowering stem Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). high with a few small stem leaves. The flowers are white with pale green striations. The dorsal sepal and petals are fused, forming a hood or "galea" over the column. The dorsal sepal has a thread-like tip Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). long and lateral sepals are erect, held closely against the galea and have thread-like tips Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). long. The labellum is Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). long, about Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). wide, dark brown and curved, and just protrudes above the sinus. Flowering occurs from March to August.[2][3]
Taxonomy and naming
Pterostylis depauperata was first formally described in 1943 by Frederick Bailey from a specimen collected near Cairns. The description was published in the Botany Bulletin of the Queensland Department of Agriculture.[1] The specific epithet (depauperata) is derived from the Latin word pauperatus meaning "impoverished"[4]:624 with the intensive prefix de-, hence "very impoverished".[4]:44
Distribution and habitat
The keeled greenhood grows with grasses and small shrubs in woodland and forest between Cooktown and Ravenshoe at altitudes above Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value)..[2][3]
References
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<references />, or <references group="..." />External links
Media related to Pterostylis depauperata at Wikimedia Commons
Data related to Pterostylis depauperata at Wikispecies
