| 词条 | Caladenia longicauda subsp. albella |
| 释义 |
| name = Small-lipped white spider orchid | image = | image_caption = | genus = Caladenia | species = longicauda | subspecies = albella | authority = Hopper & A.P.Br. | synonyms_ref = [1] | synonyms = Arachnorchis longicauda subsp.albella (Hopper & A.P.Br.) D.L.Jones & M.A.Clem. }} Caladenia longicauda subsp. albella, commonly known as the small-lipped 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 four, mostly white flowers which have a pungent smell. It usually grows in seasonal swamps between Eneabba and Gingin. DescriptionCaladenia longicauda subsp. albella is a terrestrial, perennial, deciduous, herb with an underground tuber and a single hairy leaf, {{convert|120-200|mm|in|sigfig=1|abbr=on}} long and {{convert|3-11|mm|in|sigfig=1|abbr=on}} wide. Up to four mostly white flowers {{convert|100-150|mm|in|sigfig=1|abbr=on}} long and {{convert|50-100|mm|in|sigfig=1|abbr=on}} wide are borne on a spike {{convert|250-450|mm|in|sigfig=1|abbr=on}} tall. Unlike the pleasantly-scented flowers in other subspecies of Caladenia longicauda, the flowers of this subspecies have an acrid odour. The dorsal sepal is erect, the lateral sepals are {{convert|2-5|mm|in|sigfig=1|abbr=on}} wide and the petals are {{convert|2-3|mm|in|sigfig=1|abbr=on}} wide. The labellum is white, {{convert|4-6|mm|in|sigfig=2|abbr=on}} long with narrow teeth {{convert|4-6|mm|in|sigfig=2|abbr=on}} long and the column is {{convert|12-15|mm|in|sigfig=1|abbr=on}} and {{convert|4-6|mm|in|sigfig=2|abbr=on}} wide. The relatively narrow sepals and petals and the small labellum, together with the distribution of this subspecies, distinguish it from others in the same species. Flowering occurs from August to mid-September.[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 albella and the descriptions were published in Nuytsia.[5] The subspecies name (albella) is a diminutive of the Latin word albus meaning “white", hence "small white"[6] referring to the flowers of this orchid.[2]Distribution and habitatThe small-lipped white spider orchid is common in the area between Eneabba and Gingin, where it grows in seasonal swamps, near creeks and on lake edges in the Geraldton Sandplains and Swan Coastal Plain biogeographic regions.[1][2][3][7] ConservationCaladenia longicauda subsp. albella 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=1877069124|page =62}} {{Taxonbar|from=Q26205504}}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. albella|url= https://id.biodiversity.org.au/instance/apni/573835|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=856}} 7. ^1 {{FloraBase|name=Caladenia longicauda subsp. albella|id=15358}} 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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