| 词条 | Corybas dentatus |
| 释义 |
| name = Lofty Ranges helmet orchid | status_system = EPBC | status = VU | taxon= Corybas dentatus | image= | image_caption= | authority=D.L.Jones[1] | synonyms_ref =[1] | synonyms = * Corysanthes dentata (D.L.Jones) D.L.Jones & M.A.Clem. }} Corybas dentatus, commonly known as the Lofty Ranges helmet orchid,[3] is a species of terrestrial orchid endemic to South Australia. It has a more or less round leaf and a single purplish and green flower. It is only known from two locations and is listed as "vulnerable" under the Environment Protection and Biodiversity Conservation Act. DescriptionCorybas dentatus is a terrestrial, perennial, deciduous, herb with a broad egg-shaped, heart-shaped or almost round leaf {{convert|25-45|mm|in|sigfig=1|abbr=on}} long and {{convert|30-42|mm|in|sigfig=1|abbr=on}} wide. The leaf is green on the upper surface and silvery green on the lower side. A single purplish and green flower {{convert|18-25|mm|in|sigfig=1|abbr=on}} long and {{convert|12-13|mm|in|sigfig=2|abbr=on}} wide is borne on a short flowering stem. The largest part of the flower is the dorsal sepal which is {{convert|20-22|mm|in|sigfig=2|abbr=on}} long and {{convert|9-11|mm|in|sigfig=2|abbr=on}} wide. It is pinkish grey with dark purple markings and forms a hood over the labellum. The lateral sepals are whitish, linear to lance-shaped, about {{convert|5|mm|in|sigfig=1|abbr=on}} long, and {{convert|1|mm|in|sigfig=1|abbr=on}} wide and spread widely apart from each other. The petals are lance-shaped, about {{convert|3|mm|in|sigfig=2|abbr=on}} long, {{convert|1|mm|in|sigfig=1|abbr=on}} wide and curved. The labellum is dark purple, tube-shaped near its base, about {{convert|6|mm|in|sigfig=1|abbr=on}} long, before curving and flattening into a broad egg-shaped flat {{convert|12-13|mm|in|sigfig=2|abbr=on}} long and wide with teeth on the edges. Flowering occurs in July and August.[2][3][4]TaxonomyCorybas dentatus was first formally described in 1991 by David Jones from a specimen collected in the Sandy Crrek Conservation Park and the description was published in Australian Orchid Research.[5] The specific epithet (dentatus) is a Latin word meaning "toothed" or "pointed",[6] referring to the prominent teeth on the edges of the labellum.[3]In 2002, David Jones and Mark Clements proposed splitting Corybas into smaller genera and placing this species into Corysanthes but the change has not been widely accepted.[7] Distribution and habitatThe Lofty Ranges helmet orchid grows in open forest and woodland with low shrubs and ferns. It is known from two populations, the larger of which is in the Sandy Creek Conservation Park.[2][3][4] ConservationCorybas dentatus is classified as "vulnerable" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999. The main threats to the species are road and track maintenance, weed invasion, herbicide spraying and population fragmentation. References1. ^1 {{WCSP | 47700 | Corybas dentatus }} {{Taxonbar|from=Q10261020}}2. ^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=1877069124|page =169}} 3. ^1 2 {{cite journal|last1=Jones|first1=David L.|title=New taxa of Australian Orchidaceae|journal=Australian Orchid Research|date=1991|volume=2|page=45}} 4. ^1 {{cite web|title=Approved conservation advice for Corybas dentatus|url=http://www.environment.gov.au/biodiversity/threatened/species/pubs/78681-conservation-advice.pdf|publisher=Australian Government Department of the Environment|accessdate=7 May 2018}} 5. ^{{cite web|title=Corybas dentatus|url=https://id.biodiversity.org.au/instance/apni/551610|publisher=APNI|accessdate=7 May 2018}} 6. ^{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|page =807}} 7. ^{{Citation |last=Jones |first=D.L.|year=2002 |title=Nomenclatural notes arising from studies into the tribe Diurideae (Orchidaceae) |journal=Orchadian |volume=13 |pages=436–468}} 5 : Acianthinae|Corybas|Endemic orchids of Australia|Orchids of South Australia|Plants described in 1991 |
| 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。