| 词条 | Prasophyllum tadgellianum |
| 释义 |
| name = Alpine leek orchid | image = Prasophyllum tadgellianum.jpg | image_caption = Prasophyllum tadgellianum growing near Mount Hotham | taxon = Prasophyllum tadgellianum | authority= R.S.Rogers | display_parents = 3 | synonyms=Prasophyllum alpinum R.Br. | synonyms_ref=[1] }} Prasophyllum tadgellianum, commonly known as the alpine leek orchid, is a species of orchid native to the Snowy Mountains and Tasmania. It has a single stiff, erect leaf and up to twenty scented, greenish-brown or reddish-brown flowers crowded on a stout spike. DescriptionPrasophyllum tadgellianum is a terrestrial, perennial, deciduous, herb with an underground tuber and a single stiff, erect, dark green, tube-shaped leaf {{convert|100-200|mm|in|sigfig=1|abbr=on}} long and {{convert|4-8|mm|in|sigfig=1|abbr=on}} in diameter near the base. Between ten and twenty flowers are crowded on a stout flowering spike {{convert|50-80|mm|in|sigfig=1|abbr=on}} high. The flowers are dark greenish-brown with a greenish, pink or white labellum and are usually lightly scented. They are inverted so that the labellum is above the column rather than below it. The ovary is about {{convert|4|mm|in|sigfig=1|abbr=on}} long and the petals are about {{convert|5|mm|in|sigfig=1|abbr=on}} long. The lateral sepals are about {{convert|6|mm|in|sigfig=1|abbr=on}} long, joined for most of their length and form the uppermost part of the flower. The dorsal sepal is egg-shaped to lance-shaped and about {{convert|6|mm|in|sigfig=1|abbr=on}} long. The labellum is sharply curved near its middle, often has a wavy edge and is covered with a raised callus. Flowering occurs from January to March and unlike many others in the genus, does not require fire the previous summer in order to flower.[1][2][3]Taxonomy and namingThis orchid was first formally described in 1922 by Richard Sanders Rogers and given the name Prasophyllum frenchii var. tadgellianum from a specimen collected on Mount Hotham by Alfred James Tadgell. The description was published in Transactions and proceedings of the Royal Society of South Australia.[4][5] The following year, Rogers raised the variety to species level.[6][7] The specific epithet (tadgellianum) honours Alfred James Tadgell.[7] In 1944, Herman Rupp described P. tadgellianum as a synonym of P. alpinum in his book Orchids of New South Wales[8] but in 1996, David Jones reinstated P. tadgellianum as a common species found in south-eastern Australia and described P. alpinum as a species restricted to Tasmania.[9] Distribution and habitatThe alpine leek orchid grows in grassy alpine and subalpine grassland and woodland, often in moist or wet areas, in areas above {{convert|1000|m|ft|sigfig=1|abbr=on}}. It is found south of the Brindabella Range in New South Wales and Victoria. In Tasmania it is found only near Cradle Mountain and near Bastion Bluff in the Great Western Tiers.[1][2][3] ConservationThis orchid is listed as "Rare" under the Tasmanian Threatened Species Protection Act 1995.[3] References1. ^1 {{cite web|last1=Jeanes|first1=Jeff|title=Prasophyllum tadgellianum|url=https://vicflora.rbg.vic.gov.au/flora/taxon/c02c8484-6255-4699-8a65-91d76735f432|publisher=Royal Botanic Garden Melbourne - vicflora|accessdate=10 October 2017}} 2. ^1 {{cite web|last1=Weston|first1=Peter H.|title=Prasophyllum tadgellianum|url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Prasophyllum~tadgellianum|publisher=Royal Botanic Gardens Sydney - plantnet|accessdate=10 October 2017}} 3. ^1 2 {{cite web|title=Threatened species listing statement - Prasophyllum tadgellianum|url=https://www.naturalvaluesatlas.tas.gov.au/downloadattachment?id=14456|publisher=Tasmanian Government Department of Primary Industries, Parks, Water and Environment|accessdate=10 October 2017}} 4. ^{{cite web|title=Prasophyllum frenchii var. tadgellianum|url= https://id.biodiversity.org.au/instance/apni/533683|publisher=APNI|accessdate=27 October 2017}} 5. ^{{cite journal|last1=Rogers|first1=Richard S.|title=Contributions to the Orchidology of Australia and New Zealand.|journal=Transactions and proceedings of the Royal Society of South Australia|date=1922|volume=46|pages=153–154|url=https://www.biodiversitylibrary.org/item/109617#page/167/mode/1up|accessdate=27 October 2017}} 6. ^1 {{cite web|title=Prasophyllum tadgellianum|url= https://id.biodiversity.org.au/instance/apni/536662|publisher=APNI|accessdate=27 October 2017}} 7. ^1 {{cite journal|last1=Rogers|first1=Richard S.|title=Contributions to the Orchidaceous flora of Australia|journal=Transactions and proceedings of the Royal Society of South Australia|date=1923|volume=47|pages=338–339|url=https://www.biodiversitylibrary.org/item/108497#page/364/mode/1up|accessdate=27 October 2017}} 8. ^{{cite web|title=Prasophyllum alpinum|url= https://id.biodiversity.org.au/instance/apni/506560|publisher=APNI|accessdate=27 October 2017}} 9. ^{{cite journal|last1=Jones|first1=David L.|title=Resolution of the Prasophyllum alpinum R.Br. (Orchidaceae) complex in mainland south-eastern Australia, Tasmania and New Zealand. Muelleria|journal=Muelleria|date=1996|volume=9|pages=51–62|url=https://www.rbg.vic.gov.au/documents/Muelleria_9,_p51-62,_Jones,_resolution_Prasophyllum_alpinum.pdf|accessdate=27 October 2017}} External links
6 : Prasophyllum|Flora of New South Wales|Flora of Victoria (Australia)|Flora of Tasmania|Endemic orchids of Australia|Plants described in 1922 |
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