| 词条 | Dendrobium agrostophyllum |
| 释义 |
|name = Buttercup orchid |image = LR017 72dpi Dendrobium agrostophyllum.jpg |image_caption = Illustration by Lewis Roberts |genus = Dendrobium |species = agrostophyllum |authority = F.Muell.[1] |synonyms_ref =[1] |synonyms =
}} Dendrobium agrostophyllum, the buttercup orchid,[2] is an epiphytic or lithophytic orchid in the family Orchidaceae and has a creeping rhizome with well-spaced pseudobulbs. Each pseudobulb has up to twenty grass-like leaves, some of the leaves having flowering stems on the opposite side of the pseudobulb, each raceme with up to ten waxy, fragrant, bright yellow flowers. It grows in wet forest in coast areas of north Queensland, Australia. DescriptionDendrobium agrostophyllum is an ephiphytic or lithophytic herb with creeping rhizomes that have well-spaced pseudobulbs, each with between eight and twenty grass-like leaves. The pseudobulbs are {{convert|100-600|mm|in|sigfig=1|abbr=on}} long and {{convert|5-10|mm|in|sigfig=1|abbr=on}} wide and the leaves are {{convert|40-100|mm|in|sigfig=1|abbr=on}} long, {{convert|8-12|mm|in|sigfig=1|abbr=on}} wide and yellowish with a furrow along the midline. The flowering racemes are {{convert|20-50|mm|in|sigfig=1|abbr=on}} long with between two and ten fragrant, waxy, slightly cupped, bright yellow flowers that are {{convert|10-15|mm|in|sigfig=1|abbr=on}} long, {{convert|15-20|mm|in|sigfig=1|abbr=on}} wide. The sepals are {{convert|7-9|mm|in|sigfig=1|abbr=on}} long, {{convert|5-7|mm|in|sigfig=1|abbr=on}} wide, the dorsal sepal slightly narrower than the laterals. The petals are {{convert|6-8|mm|in|sigfig=1|abbr=on}} long and {{convert|5|mm|in|sigfig=1|abbr=on}} wide. The labellum is about {{convert|9|mm|in|sigfig=1|abbr=on}} long, {{convert|6|mm|in|sigfig=1|abbr=on}} wide and has three lobes. The side lobes are curve upwards and the middle lobe has two ridges on its midline and two forward projecting flanges. Flowering occurs from July to November.[2][3]Taxonomy and namingDendrobium agrostophyllum was first formally described in 1873 by Ferdinand von Mueller and the description was published in his book Fragmenta phytographiae Australiae.[4][5] The specific epithet (agrostophyllum) is derived from the Ancient Greek words agrostos meaning "forage grass"[6]{{rp|379}} and phyllon meaning "leaf".[6]{{rp|466}} Distribution and habitatThe buttercup orchid grows on rocks and in moist forest including rainforest between the Mount Windsor National Park and the Paluma Range National Park.[2][3] References1. ^1 {{WCSP | 57012 | Dendrobium agrostophyllum}} {{Taxonbar|from=Q5802582}}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 =414–415}} 3. ^1 {{cite web |title=Trachyrhizum agrostophylla |url=http://keys.trin.org.au/key-server/data/08090a09-0d0e-410b-860c-020705070e0e/media/Html/Trachyrhizum_agrostophyllum.htm |publisher=Trin keys: Australian Tropical Rainforest Orchids |accessdate=11 November 2018}} 4. ^{{cite web|title=Dendrobium agrostophyllum|url= https://id.biodiversity.org.au/instance/apni/503293|accessdate=11 November 2018}} 5. ^{{cite book |last1=von Mueller |first1=Ferdinand |title=Fragmenta phytographiae Australiae |date=1873 |publisher=Victorian Government Printer |location=Melbourne |pages=28–29 |url=https://www.biodiversitylibrary.org/item/7225#page/29/mode/1up |accessdate=11 November 2018}} 6. ^1 {{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.}} 3 : Dendrobium|Orchids of Queensland|Plants described in 1873 |
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