| 词条 | Caladenia bicalliata subsp. cleistogama |
| 释义 |
| name = Shy limestone spider orchid | image = | image_caption = | genus = Caladenia | species = bicalliata | subspecies = cleistogama | authority = Hopper & A.P.Br. }} Caladenia bicalliata subsp. cleistogama, commonly known as the shy limestone spider orchid or sandhill spider orchid, is a plant in the orchid family Orchidaceae and is native to the south-west of Western Australia. It has a single erect, hairy leaf and one or two cream-coloured flowers which are smaller than those in subspecies bacalliata . DescriptionCaladenia bicalliata subsp. cleistogama is a terrestrial, perennial, deciduous, herb with an underground tuber and which occurs singly or in small clumps. It has a single erect, very hairy, linear to lance-shaped leaf, {{convert|10-20|cm|in|sigfig=1|abbr=on}} long and {{convert|2-5|mm|in|sigfig=1|abbr=on}} wide. The inflorescence is a raceme, {{convert|10-20|cm|in|sigfig=1|abbr=on}} high with one or two flowers, each flower about {{convert|25|mm|in|sigfig=1|abbr=on}} long and {{convert|10|mm|in|sigfig=1|abbr=on}} wide. The dorsal sepal abruptly narrows about one-third of its length from the base. The lateral sepals and petals are much shorter than those of subspecies bicalliata, lack reddish-brown tips and are a paler greenish-cream colour. The labellum is white with red spots and a serrated edge and has two rows of white-tipped calli along its centre. Flowering occurs from August to early September, however the flowers only rarely open fully.[1][2]Taxonomy and namingCaladenia bicalliata was first formally described by Richard Rogers in 1909.[3] In 2001 Stephen Hopper and Andrew Brown described two subspecies, including subspecies cleistogama and the description of the two subspecies was published in Nuytsia.[4] The subspecies epithet ("cleistogamous") is derived from the Ancient Greek words kleistos meaning "shut" or "closed"[5]{{rp|211}} and gamos meaning "gamete"[5]{{rp|514}} referring to the fact that the flowers rarely open.[1]Distribution and habitatShy limestone spider orchid occurs in a narrow coastal strip, growing on consolidated sand dunes between William Bay National Park and Cape Arid National Park in the Esperance Plains and Warren biogeographic regions.[6][7] ConservationCaladenia bicalliata subsp. cleistogama is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[6]References1. ^1 {{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=53}} {{Taxonbar|from=Q26238620}}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=27|edition=3rd}} 3. ^{{cite web|title=Caladenia bicalliata|url= https://id.biodiversity.org.au/instance/apni/512407|publisher=APNI|accessdate=13 October 2016}} 4. ^{{cite web|title=Caladenia bicalliata subsp. cleistogama|url= https://id.biodiversity.org.au/instance/apni/574352|publisher=APNI|accessdate=13 October 2016}} 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=Caladenia bicalliata subsp. cleistogama|id=18036}} 7. ^{{cite book|last1=Paczkowska|first1=Grazyna|last2=Chapman|first2=Alex R.|title=The Western Australian flora : a descriptive catalogue|date=2000|publisher=Wildflower Society of Western Australia|location=Perth|isbn=0646402439|page=76}} 7 : Caladenia|Endemic orchids of Australia|Orchids of South Australia|Orchids of Western Australia|Plants described in 2001|Taxa named by Stephen Hopper|Taxa named by Andrew Phillip Brown |
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