| 词条 | Diuris chrysantha |
| 释义 |
| name = Granite donkey orchid | image = | regnum = Plantae | unranked_divisio = Angiosperms | unranked_classis = Monocots | ordo = Asparagales | familia = Orchidaceae | subfamilia = Orchidoideae | tribus = Diurideae | subtribus = Diuridinae | genus = Diuris | species = D. chrysantha | binomial = Diuris chrysantha | binomial_authority = D.L.Jones & M.A.Clem.[1] }} Diuris chrysantha, commonly known as granite donkey orchid,[2] is a species of orchid that is endemic to eastern Australia. It has one or two leaves and up to seven deep golden to orange-coloured flowers with brown markings and occurs on the ranges and tablelands north from Tamworth to the Darling Downs. DescriptionDiuris chrysantha is a tuberous, perennial herb with one or two linear leaves {{convert|120-360|mm|in|sigfig=1|abbr=on}} long, {{convert|4-8|mm|in|sigfig=1|abbr=on}} wide and folded lengthwise. Between two and seven deep golden to orange-coloured flowers with brown markings and {{convert|18-20|mm|in|sigfig=1|abbr=on}} wide are borne on a flowering stem {{convert|150-320|mm|in|sigfig=1|abbr=on}} tall. The dorsal sepal is erect, egg-shaped, {{convert|7-9|mm|in|sigfig=1|abbr=on}} long and {{convert|6-7|mm|in|sigfig=1|abbr=on}} wide. The lateral sepals are linear to spatula-shaped, {{convert|12-18|mm|in|sigfig=1|abbr=on}} long, {{convert|2-4|mm|in|sigfig=1|abbr=on}} wide and turned downwards. The petals are more or less circular in shape, {{convert|6-8|mm|in|sigfig=1|abbr=on}} long and wide on a brown stalk {{convert|4-7|mm|in|sigfig=1|abbr=on}} long and held ear-like above the rest of the flower. The labellum is {{convert|7-9|mm|in|sigfig=1|abbr=on}} long and has three lobes. The centre lobe is heart-shaped to wedge shaped, {{convert|5-7|mm|in|sigfig=1|abbr=on}} long and {{convert|4-6|mm|in|sigfig=2|abbr=on}} wide and the side lobes are egg-shaped, {{convert|2.5-4|mm|in|sigfig=1|abbr=on}} long and {{convert|2.5-3|mm|in|sigfig=2|abbr=on}} wide. There are two callus ridges {{convert|2-3|mm|in|sigfig=1|abbr=on}} long and spreading apart from each other near the mid-line of the labellum. Flowering occurs from August to November.[2][3]Taxonomy and namingDiuris chrysantha was first formally described in 1987 by David Jones and Mark Clements from a specimen collected near Stanthorpe and the description was published in Proceedings of the Royal Society of Queensland.[4] The specific epithet (chrysantha) is derived from the Ancient Greek words chrysos meaning "gold"[5]{{rp|203}} and anthos meaning "flower".[5]{{rp|94}} Distribution and habitatThe granite donkey orchid grows in grassy forest on the ranges and tablelands north from Tamworth to the Darling Downs.[2][3] References1. ^{{WCSP | 63382 | Diuris chrysantha}} {{Taxonbar|from=Q10267377}}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=129}} 3. ^1 {{cite web|last1=Jones|first1=David L.|title=Diuris chrysantha|url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Diuris~chrysantha|publisher=Royal Botanic Garden Sydney|accessdate=16 March 2018}} 4. ^{{cite web|title=Duiris chrysantha|url= https://id.biodiversity.org.au/instance/apni/493871|publisher=APNI|accessdate=16 March 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.}} 5 : Diuris|Endemic orchids of Australia|Orchids of New South Wales|Orchids of Queensland|Plants described in 1987 |
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