| 词条 | Caladenia longicauda subsp. australora |
| 释义 |
| name = Southern white spider orchid | image = Caladenia longicauda australora.jpg | image_caption = Subspecies australora near Esperance | genus = Caladenia | species = longicauda | subspecies = australora | authority = Hopper & A.P.Br. | synonyms_ref = [1] | synonyms = Arachnorchis longicauda subsp.australora (Hopper & A.P.Br.) D.L.Jones & M.A.Clem. }} Caladenia longicauda subsp. australora, commonly known as the southern white spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It has a single hairy leaf and up to three mostly white, relatively small flowers. It grows in woodland and mallee on the south coast in and near the Fitzgerald River National Park. DescriptionCaladenia longicauda subsp. australora is a terrestrial, perennial, deciduous, herb with an underground tuber and a single hairy leaf, {{convert|60-160|mm|in|sigfig=1|abbr=on}} long and {{convert|5-10|mm|in|sigfig=1|abbr=on}} wide. Up to three mostly white flowers {{convert|80-120|mm|in|sigfig=1|abbr=on}} long and {{convert|50-80|mm|in|sigfig=1|abbr=on}} wide are borne on a spike {{convert|150-350|mm|in|sigfig=1|abbr=on}} tall. The lateral sepals and petals have long drooping tips. The dorsal sepal is erect, the lateral sepals are {{convert|5-7|mm|in|sigfig=1|abbr=on}} wide and the petals are {{convert|3-4|mm|in|sigfig=1|abbr=on}} wide. The labellum is mostly white, {{convert|18-25|mm|in|sigfig=1|abbr=on}} long with long, narrow teeth on its sides and there are four or more rows of pale red calli in its centre. Flowering occurs from September to October.[1][2][3]Taxonomy and namingCaladenia longicauda was first formally described by John Lindley in 1840 and the description was published in A Sketch of the Vegetation of the Swan River Colony.[4] In 2001 Stephen Hopper and Andrew Brown described eleven subspecies, including subspecies australora and the descriptions were published in Nuytsia.[5] The subspecies name (australora) is a derived from the Latin word australis meaning “southern",[6] referring to the southerly distribution of this subspecies.[2]Distribution and habitatThe southern white spider orchid occurs in the area between the Fitzgerald National Park and the Beaufort Inlet in the Esperance Plains biogeographic region where it grows in woodland in calcareous sand.[1][2][3][7] ConservationCaladenia longicauda subsp. australora is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[7]References1. ^1 {{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=978-1877069123|page =62}} {{Taxonbar|from=Q26205505}}2. ^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=84}} 3. ^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=93|edition=3rd}} 4. ^{{cite web|title=Caladenia longicauda|url= https://id.biodiversity.org.au/instance/apni/514089|publisher=APNI|accessdate=15 February 2017}} 5. ^1 {{cite web|title=Caladenia longicauda subsp. australora|url= https://id.biodiversity.org.au/instance/apni/573836|publisher=APNI|accessdate=15 February 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=112}} 7. ^1 {{FloraBase|name=Caladenia longicauda subsp. australora|id=15359}} 6 : Caladenia|Endemic orchids of Australia|Orchids of Western Australia|Plants described in 2001|Taxa named by Stephen Hopper|Taxa named by Andrew Phillip Brown |
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