| 词条 | Pterostylis karri |
| 释义 |
| name = Karri snail orchid | image = Pterostylis karri 02.jpg | image_caption = Pterostylis karri growing near Dunsborough | status_system = | status = | genus = Pterostylis | species = karri | authority = D.L.Jones & C.J.French[1] | synonyms_ref = | synonyms = }} Pterostylis karri, commonly known as the karri snail orchid, is a species of orchid endemic to the south-west of Western Australia. Both flowering and non-flowering plants usually have a small rosette of leaves and flowering plants have a single green and white flower with unusually long, erect lateral sepals. Like some similar greenhoods, it often forms dense colonies. DescriptionPterostylis karri is a terrestrial, perennial, deciduous, herb with an underground tuber and a small rosette of leaves {{convert|10-20|mm|in|sigfig=1|abbr=on}} wide and {{convert|5-10|mm|in|sigfig=1|abbr=on}} although the rosette is absent in some specimens. Flowering plants have a single green and white flower {{convert|15-20|mm|in|sigfig=1|abbr=on}} long and {{convert|7-8|mm|in|sigfig=2|abbr=on}} wide on a flowering stem {{convert|100-400|mm|in|sigfig=1|abbr=on}} high. There are three to eight leaves {{convert|10-20|mm|in|sigfig=1|abbr=on}} long and {{convert|5-8|mm|in|sigfig=1|abbr=on}} wide on the flowering stem. The dorsal sepal and petals are fused, forming a hood or "galea" over the column. The lateral sepals are held close to the galea almost closing the front of the flower and have erect, thread-like tips {{convert|15-30|mm|in|sigfig=1|abbr=on}} long. The labellum is large but not visible from outside the flower. Flowering occurs from August to early December.[2][3]Taxonomy and namingPterostylis karri was first formally described in 2014 by David Jones and Christopher French from a specimen collected south of Mandurah and the description was published in Australian Orchid Review. The species had previously been known as Pterostylis sp. 'karri' or Pterostylis sp. 'karri forest'.[4] The specific epithet (karri) refers to the karri (Eucalyptus diversicolor) forest where this species often grows.[4]Distribution and habitatThe karri snail orchid grows in moist places in shady forest and around granite outcrops between Walpole and Margaret River in the Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions.[2][5] ConservationPterostylis karri is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife. References1. ^{{WCSP | 491865 | Pterostylis echinulata }} {{Taxonbar|from=Q29650800}}2. ^1 {{cite book|last1=Brown|first1=Andrew|last2=Dixon|first2=Kingsley|last3=French|first3=Christopher|last4=Brockman|first4=Garry|title=Field guide to the orchids of Western Australia : the definitive guide to the native orchids of Western Australia|date=2013|publisher=Simon Nevill Publications|isbn=9780980348149|page=362}} 3. ^{{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=406|edition=3rd}} 4. ^1 {{cite web|title=Pterostylis Pterostylis sp. 'karri'|url=https://id.biodiversity.org.au/instance/apni/783641|publisher=APNI|accessdate=27 July 2017}} 5. ^{{FloraBase|name=Pterostylis karri|id = 44526}} 4 : Pterostylis|Endemic orchids of Australia|Orchids of Western Australia|Plants described in 2014 |
| 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。