| 词条 | Thelymitra × chasmogama |
| 释义 |
| name = Globe-hood 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. × chasmogama | binomial = Thelymitra × chasmogama | binomial_authority = R.S.Rogers[1] | synonyms_ref = | synonyms = }} Thelymitra × chasmogama, commonly called the globe-hood sun orchid,[2] is a species of orchid that is endemic to south-eastern Australia. It has a single tapering, channelled leaf with a reddish base and up to six bright pink flowers with pale yellow tufts on top of the anther. It is a natural hybrid between T. luteocilium and T. megacalyptra. DescriptionThelymitra × chasmogama is a tuberous, perennial herb with a single channelled, tapering linear leaf {{convert|130-270|mm|in|sigfig=1|abbr=on}} long and {{convert|3-7|mm|in|sigfig=1|abbr=on}} wide with a reddish base. Up to six bright pink flowers {{convert|20-25|mm|in|sigfig=1|abbr=on}} wide are arranged on a flowering stem {{convert|150-300|mm|in|sigfig=1|abbr=on}} tall. There are two bracts along the flowering stem. The sepals and petals are {{convert|7-15|mm|in|sigfig=1|abbr=on}} long and the column is mauve pinkish and {{convert|4-6.5|mm|in|sigfig=1|abbr=on}} long. The lobe on the top of the anther has a purplish brown band and a deeply notched yellow tip. The side lobes have pale yellow hair tufts on their ends. Flowering occurs from September to November. The plants are variable, due to back-crossing with the two parent species, T. luteocilium and T. megacalyptra.[2][3]Taxonomy and namingThelymitra × chasmogama was first formally described in 1927 by Richard Sanders Rogers from a specimen collected near Golden Grove and the description was published in Transactions and proceedings of the Royal Society of South Australia.[4] The specific epithet (x chasmogama) is derived from the Ancient Greek words chasma meaning "yawning abyss" or "gulf"[5]{{rp|414}} and gamos meaning "marriage", "wedding" or "union".[5]{{rp|514}} Distribution and habitatThe globe-hood sun orchid grows where its two parent species occur, in woodland, open forest and scrub. It occurs in central Victoria and in the south-east of South Australia.[2][3] References1. ^{{WCSP | 203725 | Thelymitra x chasmogama }} 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 =256}} 3. ^1 {{cite web|last1=Ohlsen|first1=Daniel| title=Thelymitra x chasmogama|url=https://vicflora.rbg.vic.gov.au/flora/taxon/0f7d0475-b96c-4200-9229-d109466a1049|publisher=Royal Botanic Gardens Victoria|accessdate=13 June 2018}} 4. ^{{cite web|title=Thelymitra x chasmogama|url= https://id.biodiversity.org.au/instance/apni/574947|publisher=APNI|accessdate=13 June 2018}} 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.}} External links{{Taxonbar|from=Q15468035}}{{DEFAULTSORT:Thelymitra x chasmogama}} 6 : Thelymitra|Endemic orchids of Australia|Orchids of Victoria (Australia)|Orchids of South Australia|Plants described in 1927|Interspecific orchid hybrids |
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