| 词条 | Thelymitra exigua |
| 释义 |
| name = Short 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. exigua | binomial = Thelymitra exigua | binomial_authority = Jeanes[1] | synonyms_ref = | synonyms = }} Thelymitra exigua, commonly called the short sun orchid,[2] is a species of orchid that is endemic to south-eastern Australia. It has a single fleshy, channelled, dark green leaf and up to eight relatively small pale blue flowers with white toothbrush-like tufts on top of the anther. DescriptionThelymitra exigua is a tuberous, perennial herb with a single fleshy, channelled, dark green, linear to lance-shaped leaf {{convert|50-220|mm|in|sigfig=1|abbr=on}} long and {{convert|2.5-10|mm|in|sigfig=1|abbr=on}} wide with a purplish base. Up to eight pale blue to pale purplish blue flowers {{convert|13-22|mm|in|sigfig=1|abbr=on}} wide are borne on a flowering stem {{convert|100-300|mm|in|sigfig=1|abbr=on}} tall. The sepals and petals are {{convert|5-11|mm|in|sigfig=1|abbr=on}} long and {{convert|3-6|mm|in|sigfig=1|abbr=on}} wide. The column is pale pink to pale purplish, {{convert|4-6|mm|in|sigfig=2|abbr=on}} long and {{convert|2-3|mm|in|sigfig=1|abbr=on}} wide. The lobe on the top of the anther is gently curved and dark brown to black with a yellow tip. The side lobes curve upwards near their middle and have toothbrush-like tufts of white hairs covering their tops. The flowers are self-pollinating, only open on warm to hot sunny days and then only slowly if at all. Flowering occurs from September to November.[2][3][4]Taxonomy and namingThelymitra exigua was first formally described in 2004 by Jeff Jeanes from a specimen collected near Woorndoo and the description was published in Muelleria.[5] The specific epithet (exigua) is a Latin word meaning "small", "short", "poor" or "scanty",[6] referring to the relatively short, stout nature of this orchid.[3]Distribution and habitatThe short sun orchid grows in grassland, heath and shrubland. It is found in western Victoria, south-eastern South Australia and in Tasmania, including on King Island.[2][3] References1. ^{{WCSP | 268335 | Thelymitra exigua }} 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|pages =234–235}} 3. ^1 2 {{cite journal|last1=Jeanes|first1=Jeffrey A.|title=A revision of the Thelymitra pauciflora (Orchidaceae) complex in Australias|journal=Muelleria|date=2004|volume=19|pages=28–30|url=https://www.rbg.vic.gov.au/documents/Muelleria_19,_p19-79,_Jeanes,_Thelymitra_pauciflora_complex.pdf|accessdate=13 May 2018}} 4. ^{{cite web|last1=Jeanes|first1=Jeff|last2=Stajsic|first2=Val|title=Thelymitra exigua|url=https://vicflora.rbg.vic.gov.au/flora/taxon/5925375b-1778-4015-94b9-432c25f65c59|publisher=Royal Botanic Gardens Victoria|accessdate=17 May 2018}} 5. ^{{cite web|title=Thelymitra exigua|url= https://id.biodiversity.org.au/instance/apni/589762|publisher=APNI|accessdate=17 May 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=311}} External links
6 : Thelymitra|Endemic orchids of Australia|Orchids of South Australia|Orchids of Victoria (Australia)|Orchids of Tasmania|Plants described in 2004 |
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