| 词条 | Pterostylis concava |
| 释义 |
| name = Pouched greenhood | image = Pterostylis concava.jpg | image_caption = Pterostylis concave growing near Wandering | genus = Pterostylis | species = concava | authority = D.L.Jones & M.A.Clem.[1] | synonyms_ref = [1] | synonyms =
}} Pterostylis concava, commonly known as the pouched greenhood[3] or cupped banded greenhood,[4] is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. The plants either have a rosette of leaves in the years when not flowering or stem leaves on a flowering spike. When flowering, it has up to ten or more flowers which are dark reddish-brown, sometimes green and white with deeply cupped lateral sepals. It is an uncommon orchid, mostly found between Bindoon and Mount Barker. DescriptionPterostylis concava, is a terrestrial, perennial, deciduous, herb with an underground tuber. Non-flowering plants have a rosette of between four and eight leaves, each leaf {{convert|6-30|mm|in|sigfig=1|abbr=on}} long and {{convert|5-15|mm|in|sigfig=1|abbr=on}} wide on a stem {{convert|10-15|mm|in|sigfig=1|abbr=on}} tall. When flowering, there are ten or more dark reddish-brown, green or green and white flowers borne on a flowering spike {{convert|100-450|mm|in|sigfig=1|abbr=on}} high. The flowering spike has between three and nine stem leaves which are {{convert|14-40|mm|in|sigfig=1|abbr=on}} long and {{convert|4-7|mm|in|sigfig=1|abbr=on}} wide. The flowers are {{convert|20-25|mm|in|sigfig=1|abbr=on}} long, {{convert|12-15|mm|in|sigfig=1|abbr=on}} wide. The dorsal sepal and petals form a hood called the "galea" over the column. The lateral sepals turn downwards, are deeply dished, {{convert|17-20|mm|in|sigfig=1|abbr=on}} long, {{convert|18-22|mm|in|sigfig=1|abbr=on}} wide and joined at their base. The labellum is dark brown, hairy and insect-like, about {{convert|7|mm|in|sigfig=1|abbr=on}} long, {{convert|4|mm|in|sigfig=1|abbr=on}} wide and flicks upwards when touched. Flowering occurs from June to early September.[1][2][3]Taxonomy and namingPterostylis concava was first formally described in 1989 by David Jones and Mark Clements and the description was published in Australian Orchid Research from a specimen collected between Boyup Brook and Cranbrook.[4] The specific epithet (concava) is a Latin word meaning "hollowed" or "arched inward"[5] referring to the dished lateral sepals.[2]Distribution and habitatThe pouched greenhood grows in woodland and forest, usually in moist, sheltered locations between Bindoon and Mount Barker with a disjunct population east of Esperance.[1][2][3] It occurs in the Avon Wheatbelt, Esperance Plains, Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions.[6] ConservationPterostylis concava is classified as "not threatened" by the Government of Western Australia Department of Parks and Wildlife.[6]References1. ^1 2 {{cite book|last1=Jones|first1=David L.|title=A complete guide to native orchids of Australia including the island territories|date=2006|publisher=New Holland|location=Frenchs Forest, N.S.W.|isbn=978-1877069123|pages =338–339}} {{Taxonbar|from=Q15491767|from2=Q52083154}}2. ^1 2 3 {{cite book|last1=Brown|first1=Andrew|last2=Dundas|first2=Pat|last3=Dixon|first3=Kingsley|last4=Hopper|first4=Stephen|title=Orchids of Western Australia|date=2008|publisher=University of Western Australia Press|location=Crawley, Western Australia|isbn=9780980296457|page=386}} 3. ^1 {{cite book|last1=Hoffman|first1=Noel|last2=Brown|first2=Andrew|title=Orchids of South-West Australia|date=2011|publisher=Noel Hoffman|location=Gooseberry Hill|isbn=9780646562322|page=420|edition=3rd}} 4. ^1 2 {{cite web|title=Pterostylis concava|url=https://id.biodiversity.org.au/instance/apni/486833|publisher=APNI|accessdate=23 June 2017}} 5. ^{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.page =98}} 6. ^1 {{FloraBase|name=Pterostylis concava|id=10875}} 4 : Pterostylis|Endemic orchids of Australia|Orchids of Western Australia|Plants described in 1989 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。