| 词条 | Caladenia busselliana |
| 释义 |
| name = Bussell's spider orchid | image = Caladenia busselliana.jpg | image_caption = Caladenia busselliana growing near Dunsborough | status_system = EPBC | status = EN | genus = Caladenia | species = busselliana | authority = Hopper & A.P.Br.[1] }} Caladenia busselliana, commonly known as Bussell's spider orchid, is a plant in the orchid family Orchidaceae and is endemic to a small area in the south-west of Western Australia. It is a rare orchid with an erect, hairy leaf and up to three pale yellow flowers. Only about fifty specimens are known and it is threatened by habitat destruction and by too-frequent or too infrequent bushfires. DescriptionCaladenia busselliana is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, hairy leaf {{convert|20-30|cm|in|sigfig=1|abbr=on}} long and {{convert|5-10|mm|in|sigfig=1|abbr=on}} wide. There are up to three pale yellow flowers on a stem {{convert|20-30|cm|in|sigfig=1|abbr=on}} high. The flowers are {{convert|6-10|cm|in|sigfig=1|abbr=on}} long and {{convert|5-8|cm|in|sigfig=1|abbr=on}} wide. The lateral sepals and petals spread widely and the sepals are thickened. The labellum is pale yellow to white and lacks the red tip common to similar spider orchids. The sides of the labellum have narrow teeth or calli which have a "clubbed" end. There are four or more rows of red-tipped calli along the centre of the labellum. Flowering occurs between September and October and is followed by a non-fleshy, dehiscent capsule containing a large number of seeds.[1][2][3]Taxonomy and namingCaladenia busselliana was first formally described by Stephen Hopper and Andrew Brown in 2001 from a specimen collected by Greg Bussell near Quindalup and the description was published in Nuytsia.[4] The specific epithet (busselliana) honours the collector type specimen.[1][2]Distribution and habitatBussell's spider orchid grows in swampy jarrah forest and marri woodland, often with green kangaroo paw, (Anigozanthos viridis) and the more common swamp spider orchid (Caladenia paludosa). It is only known from two small areas near Vasse and Yallingup at the northern end of the Leeuwin-Naturaliste ridge in the Swan Coastal Plain biogeographic region.[1][2][5][6] ConservationCaladenia busselliana is classified as "endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) and as "rare flora" under the Western Australian Wildlife Conservation Act 1950.[5][6]References1. ^1 2 {{cite book|last1=Brown|first1=Andrew|last2=Dixon|first2=Kingsley|last3=French|first3=Christopher|last4=Brockman|first4=Garry|title=Field guide to the orchids of Western Australia : the definitive guide to the native orchids of Western Australia|date=2013|publisher=Simon Nevill Publications|isbn=9780980348149|page=100}} {{Taxonbar|from=Q9673390}}2. ^1 2 {{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=126|edition=3rd}} 3. ^{{cite web|title=Caladenia|url=http://keybase.rbg.vic.gov.au/keys/show/5806|publisher=Royal Botanic Gardens Victoria|accessdate=31 October 2016}} 4. ^1 {{cite web|title=Caladenia busselliana|url= https://id.biodiversity.org.au/instance/apni/587819|publisher=APNI|accessdate=31 October 2016}} 5. ^1 {{cite web|last1=Patten|first1=Julie|last2=Webb|first2=Andrew|last3=Batty|first3=Andrew|title=Bussell's spider orchid (Caladenia bueeslliana) recovery plan|url=http://www.environment.gov.au/system/files/resources/e9d45338-5064-49a9-bb7d-c23edd9f042c/files/caladenia-busselliana.pdf|publisher=Australian Government Department of the Environment|accessdate=31 October 2016}} 6. ^1 {{FloraBase|name=Caladenia busselliana|id=13615}} 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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