| 词条 | Prasophyllum calcicola |
| 释义 |
| name = Limestone leek orchid | image = | image_caption = | taxon = Prasophyllum calcicola | authority= R.J.Bates | display_parents = 3 | synonyms_ref= | synonyms= }} Prasophyllum calcicola, commonly known as the limestone leek orchid, is a species of orchid endemic to Australia. It has a single, smooth, tube-shaped leaf and up to twelve yellowish-green flowers on an erect flowering stem. It is found in coastal areas of Western Australia and South Australia growing on soils derived from limestone. DescriptionPrasophyllum calcicola is a terrestrial, perennial, deciduous, herb with an underground tuber and a single smooth, tube-shaped leaf which is {{convert|50-150|mm|in|sigfig=1|abbr=on}} long and about {{convert|2|mm|in|sigfig=1|abbr=on}} in diameter near the reddish base. Between three and twelve or more flowers are arranged on a flowering spike. The flowers are yellowish-green, about {{convert|4|mm|in|sigfig=1|abbr=on}} long and {{convert|3|mm|in|sigfig=1|abbr=on}} wide. As with others in the genus, the flowers are inverted so that the labellum is above the column rather than below it. The dorsal sepal is egg-shaped to lance-shaped, about {{convert|2|mm|in|sigfig=1|abbr=on}} long, {{convert|2-3|mm|in|sigfig=1|abbr=on}} wide and green with a red edge. The lateral sepals are lance-shaped, {{convert|2-4|mm|in|sigfig=1|abbr=on}} long and joined to each other for about half their length. The petals are triangular in shape, about {{convert|2|mm|in|sigfig=1|abbr=on}} long and {{convert|1|mm|in|sigfig=1|abbr=on}} wide. The labellum is {{convert|2-3|mm|in|sigfig=1|abbr=on}} long, oblong to lance-shaped and turns upward at 90° about half-way along. Flowering occurs in September and October.[1][2][3]Taxonomy and namingPrasophyllum calcicola was first formally described in 1989 by Robert Bates and the description was published in Journal of the Adelaide Botanic Garden from a specimen collected in the Warrenben Conservation Park.[1][4] The specific epithet (calcicola) is derived from the Latin words calx meaning "limestone"[5]{{rp|205}} and -cola meaning "dweller",[5]{{rp|478}} referring to the usual habitat of this species.[3]Distribution and habitatThe limestone leek orchid grows in coastal areas in calcareous sand and near limestone. It occurs between north of Geraldton and Israelite Bay in Western Australia and in the south-east of South Australia.[2][3][6] ConservationThis orchid is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[6] References1. ^1 {{cite journal|last1=Bates|first1=Robert John|title=Prasophyllum calcicola, P. macrostachyum and P. ringens (Orchidaceae): three similar species from Western and southern Australia.|journal=Journal of the Adelaide Botanic Garden|date=1989|volume=11|issue=2|pages=179–182|url=https://data.environment.sa.gov.au/Content/Publications/JABG11P179_Bates.pdf|accessdate=2 November 2017}} 2. ^1 {{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=358|edition=3rd}} 3. ^1 2 {{cite book|last1=Brown|first1=Andrew|last2=Dundas|first2=Pat|last3=Dixon|first3=Kingsley|last4=Hopper|first4=Stephen|title=Orchids of Western Australia|date=2008|publisher=University of Western Australia Press|location=Crawley, Western Australia|isbn=9780980296457|page=324}} 4. ^{{cite web|title=Prasophyllum calcicola|url= https://id.biodiversity.org.au/instance/apni/507219|publisher=APNI|accessdate=2 November 2017}} 5. ^1 {{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.}} 6. ^1 {{FloraBase|name=Prasophyllum calcicola|id=15425}} External links
5 : Prasophyllum|Flora of South Australia|Flora of Western Australia|Plants described in 1989|Endemic orchids of Australia |
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