| 词条 | Thelymitra × truncata |
| 释义 |
| name = Truncate sun orchid | image = | image_caption = | regnum = Plantae | unranked_divisio = Angiosperms | unranked_classis = Monocots | ordo = Asparagales | familia = Orchidaceae | subfamilia = Orchidoideae | tribus = Diurideae | subtribus = Thelymitrinae | genus = Thelymitra | species = T. × truncata | binomial = Thelymitra × truncata | binomial_authority = R.S.Rogers[1] | synonyms_ref =[1] | synonyms =* Thelymitra ixioides var. truncata (R.S.Rogers) Nicholls }} Thelymitra × truncata, commonly called the truncate sun orchid,[3] is a species of orchid that is endemic to south-eastern Australia. It has a single tapering, more or less flat leaf with a reddish base and up to six blue, pink or white flowers with a tube-shaped lobe on top of the anther. It is a natural hybrid between a range of species, including T. pauciflora and T. ixioides. DescriptionThelymitra × truncata is a tuberous, perennial herb with a single more or less flat or channelled, tapering linear to lance-shaped leaf {{convert|80-300|mm|in|sigfig=1|abbr=on}} long and {{convert|2-8|mm|in|sigfig=1|abbr=on}} wide with a reddish base. Up to six or more pale to deep blue, pinkish or sometimes white flowers {{convert|20-25|mm|in|sigfig=1|abbr=on}} wide are arranged on a flowering stem {{convert|70-550|mm|in|sigfig=1|abbr=on}} tall. There are one or two bracts along the flowering stem. The sepals and petals are {{convert|6-18|mm|in|sigfig=1|abbr=on}} long. The column is a similar colour to the petals and {{convert|3-5|mm|in|sigfig=1|abbr=on}} long. The lobe on top of the anther is tube-shaped with a dark collar and a yellow tip. The side lobes have mop-like tufts of white hairs on their ends. Flowering occurs from October to December. The plants are variable, due to crossing between a range of species to produce this hybrid.[2][3]Taxonomy and namingThelymitra × truncata was first formally described in 1917 by Richard Sanders Rogers from a specimen collected near Myponga and the description was published in Transactions and proceedings of the Royal Society of South Australia.[4][5] The specific epithet (x truncata) is a Latin word meaning meaning "to maim or shorten by cutting off",[6] referring to the shaped of the middle lobe on top of the column.[5]Distribution and habitatThe truncate sun orchid is widespread but uncommon, growing in heath, woodland and open forest. It occurs in southern New South Wales, most of Victoria, south-eastern South Australia and in Tasmania.[2][3] References1. ^1 {{WCSP | 203826 | Thelymitra x truncata }} 2. ^1 2 {{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 =257}} 3. ^1 {{cite web|last1=Jeanes|first1=Jeff|last2=Stajsic|first2=Val| title=Thelymitra x truncata|url=https://vicflora.rbg.vic.gov.au/flora/taxon/2a50bd14-9f95-4259-bb64-539db35fb915|publisher=Royal Botanic Gardens Victoria|accessdate=17 June 2018}} 4. ^{{cite web|title=Thelymitra x truncata|url= https://id.biodiversity.org.au/instance/apni/574943|publisher=APNI|accessdate=13 June 2018}} 5. ^1 {{cite journal |last1=Rogers |first1=Richard S. |title=Additions to the orchidaceous plants of South Australia |journal=Transactions and proceedings of the Royal Society of South Australia |date=1917 |volume=41 |page=343 |url=https://www.biodiversitylibrary.org/item/109628#page/355/mode/1up |accessdate=17 June 2018}} 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 = 708}} External links
8 : Thelymitra|Endemic orchids of Australia|Orchids of Victoria (Australia)|Orchids of New South Wales|Orchids of South Australia|Orchids of Tasmania|Plants described in 1917|Interspecific orchid hybrids |
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