| 词条 | Prasophyllum australe |
| 释义 |
| image = Prasophyllum gracile (8692967674).jpg | image_upright = 0.8 | taxon = Prasophyllum australe | authority = R.Br.[1] }} Prasophyllum australe, commonly known as the southern leek orchid or austral leek orchid, is a species of orchid and is endemic to south-eastern Australia. It has a single tubular, green leaf and up to fifty scented, greenish-brown flowers with red stripes. DescriptionPrasophyllum australe is a terrestrial, perennial, deciduous, herb with an underground tuber and a single green, tube-shaped leaf up to {{convert|350|mm|in|sigfig=1|abbr=on}} long and {{convert|8|mm|in|sigfig=1|abbr=on}} in diameter near its reddish base. Up to fifty or more highly scented flowers are arranged along {{convert|60-200|mm|in|sigfig=1|abbr=on}} of a thin flowering spike {{convert|250-900|mm|in|sigfig=1|abbr=on}} high. The flowers are greenish-brown with white reddish stripes and are often sweetly fragrant.[1] As with others in the genus, the flowers are inverted so that the labellum is above the column rather than below it. The ovary is {{convert|6-10|mm|in|sigfig=1|abbr=on}} long and pressed against the flowering stem. 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 and lateral sepals and the petals are similar in size and shape, lance-shaped to egg-shaped, {{convert|8-10|mm|in|sigfig=1|abbr=on}} long, but the lateral sepals are joined at their sides. The labellum is white, about {{convert|8|mm|in|sigfig=1|abbr=on}} long and {{convert|2|mm|in|sigfig=1|abbr=on}} wide, curves upwards and has a wavy margin. Flowering occurs from September to January and is more prolific after fire the previous summer.[2][3]Taxonomy and namingPrasophyllum australe was first formally described in 1810 by Robert Brown and the description was published in Prodromus Florae Novae Hollandiae et Insulae Van Diemen.[4][5] The specific epithet (australe) is a Latin word meaning "south".[6]Distribution and habitatThe southern leek orchid grows in swampy places in forest and heath in south-eastern Queensland, near-coastal New South Wales, southern Victoria, south-eastern South Australia and in Tasmania.[2][3][7] References1. ^{{cite book |title= Genera Orchidacearum: Volume 2 |editor1= Alec M. Pridgeon|editor2=Phillip J. Cribb|editor3=Mark W. Chase|editor4=Finn Rasmussen |publisher= OUP Oxford |year= 2001 |isbn= 9780198507109 |page= 186}} {{Taxonbar|from=Q15488070}}2. ^1 {{cite web|last1=Jeanes|first1=Jeff|title=Prasophyllum australe|url=https://vicflora.rbg.vic.gov.au/flora/taxon/db3e335d-6432-4472-817a-faabcc1e6d5e|publisher=Royal Botanic Garden Melbourne - vicflora|accessdate=13 October 2017}} 3. ^1 {{cite web|last1=Bernhardt|first1=Peter|last2=Rowe|first2=Ross|title=Prasophyllum australe|url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Prasophyllum~australe|publisher=Royal Botanic Gardens Sydney - plantnet|accessdate=13 October 2017}} 4. ^1 {{cite web|title=Prasophyllum australe|url= https://id.biodiversity.org.au/instance/apni/506864|publisher=APNI|accessdate=13 October 2017}} 5. ^{{cite book|last1=Brown|first1=Robert|title=Prodromus Florae Novae Hollandiae et Insulae Van Diemen|date=1810|location=London|page=318|url=https://www.biodiversitylibrary.org/item/21771#page/188/mode/1up|accessdate=13 October 2017}} 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 = 731}} 7. ^{{cite journal|last1=Jones|first1=David L.|title=A taxonomic review of Prasophyllum in Tasmania|journal=Australian Orchid Research|date=1998|volume=3|issue=6|pages=101–102}} 8 : Prasophyllum|Endemic orchids of Australia|Flora of Queensland|Flora of New South Wales|Flora of Victoria (Australia)|Flora of Tasmania|Flora of South Australia|Plants described in 1810 |
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