| 词条 | Diuris setacea |
| 释义 |
|name = Bristly donkey orchid |image = Diuris setacea - Bristly donkey orchid (8035569990) - cropped.jpg |image_caption = |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Monocots |ordo = Asparagales |familia = Orchidaceae |subfamilia = Orchidoideae |tribus = Diurideae |subtribus = Diuridinae |genus = Diuris |species = D. setacea |binomial = Diuris setacea |binomial_authority = R.Br.[1] }} Diuris setacea, commonly called the bristly donkey orchid,[2] is a species of orchid that is endemic to the south-west of Western Australia. It has a tuft of up to ten twisted leaves at its base and up to seven yellow flowers with a few brown markings. It grows in moist soil on granite outcrops and flowers much more prolifically after fire the previous summer. DescriptionDiuris setacea is a tuberous, perennial herb with between six and ten spirally twisted leaves in a tuft at its base. The leaves are {{convert|50-100|mm|in|sigfig=1|abbr=on}} long and {{convert|1-2|mm|in|sigfig=1|abbr=on}} wide. Between two and seven yellow flowers with brown markings, {{convert|25-30|mm|in|sigfig=2|abbr=on}} long and {{convert|20-30|mm|in|sigfig=1|abbr=on}} wide are borne on a flowering stem {{convert|150-300|mm|in|sigfig=1|abbr=on}} tall. The dorsal sepal is erect, {{convert|13-16|mm|in|sigfig=1|abbr=on}} long and {{convert|7-8|mm|in|sigfig=2|abbr=on}} wide. The lateral sepals are {{convert|15-18|mm|in|sigfig=1|abbr=on}} long, {{convert|2-3|mm|in|sigfig=1|abbr=on}} wide and turned downwards. The petals are more or less erect or bent backwards, {{convert|11-14|mm|in|sigfig=1|abbr=on}} long and {{convert|6-7|mm|in|sigfig=2|abbr=on}} wide on a greenish brown stalk {{convert|3-5|mm|in|sigfig=2|abbr=on}} long. The labellum is {{convert|12-14|mm|in|sigfig=2|abbr=on}} long and has three lobes. The centre lobe is diamond-shaped, {{convert|6-8|mm|in|sigfig=1|abbr=on}} wide and folded lengthwise. The side lobes are {{convert|4-6|mm|in|sigfig=2|abbr=on}} long and {{convert|4|mm|in|sigfig=1|abbr=on}} wide and spread apart from each other. There are two, ridge-like calli {{convert|5-7|mm|in|sigfig=1|abbr=on}} long and outlined in brown along the mid-line of the labellum. Flowering occurs from October to December but much more prolifically after fire the previous summer.[2][3][4]Taxonomy and namingDiuris setacea was first described in 1810 by Robert Brown and the description was published in his Prodromus Florae Novae Hollandiae et Insulae Van Diemen.[5][6] The specific epithet (setacea) is derived from the Latin word seta meaning "bristle".[7]Distribution and habitatThe bristly donkey orchid grows in low heath in moist soil on granite outcrops between Esperance and Kalbarri.[3] ConservationDiuris setacea is classified as "not threatened" by the Government of Western Australia Department of Parks and Wildlife.[8]References1. ^{{WCSP | 63457 | Diuris setacea}} 2. ^1 {{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 =125}} 3. ^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=230}} 4. ^{{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=495|edition=3rd}} 5. ^{{cite web|title=Duiris setacea|url= https://id.biodiversity.org.au/instance/apni/521306|publisher=APNI|accessdate=6 April 2018}} 6. ^{{cite book|last1=Brown|first1=Robert|title=Prodromus Florae Novae Hollandiae et Insulae Van Diemen|date=1810|location=London|page=316|url=https://www.biodiversitylibrary.org/item/21771#page/186/mode/1up|accessdate=6 April 2018}} 7. ^{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|page=392}} 8. ^{{FloraBase|name=Diuris setacea |id=1638}} External links
5 : Diuris|Endemic orchids of Australia|Orchids of Western Australia|Endemic flora of Western Australia|Plants described in 1810 |
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