| 词条 | Pterostylis hians |
| 释义 |
| name = Opera house greenhood | image = | image_caption = | status_system = | status = | genus = Pterostylis | species = hians | authority = D.L.Jones[1] | synonyms_ref = [2] | synonyms = Diplodium hians (D.L.Jones) D.L.Jones & M.A.Clem. }} Pterostylis hians, commonly known as the opera house greenhood, is a species of orchid endemic to New South Wales. Non-flowering plants have a rosette of leaves flat on the ground but flowering plants have a single shiny white and green flower. This greenhood is only known from a single location near Ulladulla. DescriptionPterostylis hians is a terrestrial, perennial, deciduous, herb with an underground tuber and when not flowering, a rosette of dark green, more or less round leaves, each leaf {{convert|8-12|mm|in|sigfig=1|abbr=on}} long and {{convert|9-13|mm|in|sigfig=1|abbr=on}} wide. Flowering plants have a single bright green and white flower {{convert|13-16|mm|in|sigfig=1|abbr=on}} long and {{convert|10-16|mm|in|sigfig=1|abbr=on}} wide on a stem {{convert|100-300|mm|in|sigfig=1|abbr=on}} tall. The dorsal sepal and petals are fused, forming a hood or "galea" over the column and the dorsal sepal has a short, sharply pointed tip. The lateral sepals are held closely against the galea, have erect thread-like tips {{convert|9-12|mm|in|sigfig=1|abbr=on}} long and a protruding, platform-like sinus between their bases. The labellum is about {{convert|5|mm|in|sigfig=1|abbr=on}} long and {{convert|3|mm|in|sigfig=1|abbr=on}} wide, just visible above the sinus. Flowering occurs from March to May.[3]Taxonomy and namingPterostylis hians was first formally described in 1997 by David Jones from a specimen collected near Manyana and the description was published in The Orchadian.[4] The specific epithet (hians) is a Latin word meaning "gaping" or "yawning".[5]Distribution and habitatThe opera house greenhood grows in shrubby forest in a small area near Ulladulla.[3][6] References1. ^{{WCSP | 170572 | Pterostylis hians }} {{Taxonbar|from=Q15494830}}2. ^{{WCSP | 170572 | Pterostylis hians }} 3. ^1 {{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|page =289}} 4. ^{{cite web|title=Pterostylis hians|url=https://id.biodiversity.org.au/instance/apni/581240|publisher=APNI|accessdate=28 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 =574}} 6. ^{{cite web|title=Pterostylis hians|url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Pterostylis~hians|publisher=Royal Botanic Garden Sydney|accessdate=28 June 2017}} 4 : Pterostylis|Endemic orchids of Australia|Orchids of New South Wales|Plants described in 1997 |
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