| 词条 | Microtis globula |
| 释义 |
| name = Globular mignonette orchid | genus = Microtis (plant) | species = globula | status_system = EPBC | status = VU | image = | image_caption = | authority = R.J.Bates[1] }} Microtis familiaris, commonly known as the globular mignonette orchid[2] or globular onion orchid[3] is a species of orchid endemic to the south-west coastal region of Western Australia. It has a single hollow, onion-like leaf and up to thirty five small greenish-yellow, almost globe-shaped flowers. It often grows in large colonies but only flowers after hot fires the previous summer. DescriptionMicrotis globula is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, smooth, tubular leaf {{convert|100-250|mm|in|sigfig=1|abbr=on}} long and {{convert|3-4|mm|in|sigfig=1|abbr=on}} wide. Between eight and thirty five greenish-yellow flowers are arranged along a flowering stem {{convert|200-350|mm|in|sigfig=1|abbr=on}} tall. The flowers are almost globe-shaped, about {{convert|2.5|mm|in|sigfig=1|abbr=on}} long and wide. The dorsal sepal is egg-shaped to almost round, about {{convert|2|mm|in|sigfig=1|abbr=on}} long and wide and hood-like. The lateral sepals are triangular, about {{convert|2|mm|in|sigfig=1|abbr=on}} long, {{convert|1|mm|in|sigfig=1|abbr=on}} wide and curved with their upper edge partly overlapping the dorsal sepal. The petals are egg-shaped, about {{convert|1.5|mm|in|sigfig=1|abbr=on}} long, {{convert|1|mm|in|sigfig=1|abbr=on}} wide and are surrounded by the sepals. The labellum is {{convert|1.5-2|mm|in|sigfig=1|abbr=on}} long, about {{convert|1|mm|in|sigfig=1|abbr=on}} wide and lacks an obvious callus. Flowering occurs from December to January but only after a hot or late fire the previous summer.[2][3][4]Taxonomy and namingMicrotis globula was first formally described in 1984 by Robert John Bates from a specimen collected near Walpole and the description was published in Journal of the Adelaide Botanic Gardens.[5] The specific epithet (globula) is the diminutive form of the Latin word globus meaning "ball" or "sphere",[6] hence "little ball", referring to the shape of the flowers.[2]Distribution and habitatThe globular mignonette orchid grows in peaty, winter-wet areas between Albany and Northcliffe in the Jarrah Forest and Warren biogeographic regions.[2][3][7] ConservationMicrotis globula is classified as "Priority Four" by the Government of Western Australia Department of Parks and Wildlife,[7] meaning that is rare or near threatened.[8] It is also classified as "vulnerable" under the Commonwealth Government Environment Protection and Biodiversity Conservation Act 1999 (EPBC) Act. The main threat to the species is inappropriate fire regimes.[9]References1. ^{{WCSP | 128194 | Microtis globula}} 2. ^1 2 3 {{cite book|last1=Brown|first1=Andrew|last2=Dundas|first2=Pat|last3=Dixon|first3=Kingsley|last4=Hopper|first4=Stephen|title=Orchids of Western Australia|date=2008|publisher=University of Western Australia Press|location=Crawley, Western Australia|isbn=9780980296457|page=287}} 3. ^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 =224–225}} 4. ^{{cite journal|last1=Bates|first1=Robert J.|title=The genus Microtis R.Br. (Orchidaceae): a taxonomic revision with notes on biology|journal=Journal of the Adelaide Botanic Gardens|date=1984|volume=13|pages=60–62|url=https://data.environment.sa.gov.au/Content/Publications/JABG07P045_Bates.pdf|accessdate=25 February 2018}} 5. ^{{cite web|title=Microtis globula|url=https://id.biodiversity.org.au/instance/apni/486271|publisher=APNI|accessdate=25 February 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 =119}} 7. ^1 {{FloraBase|name=Microtis globula|id=1659}} 8. ^{{cite web|title=Conservation codes for Western Australian Flora and Fauna|url=http://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/Listings/conservation_code_definitions.pdf|publisher=Government of Western Australia Department of Parks and Wildlife|accessdate=23 December 2015}} 9. ^{{cite web|title=Approved Conservation Advice for Microtis globula (South-Coast Mignonette Orchid)|url=http://www.environment.gov.au/biodiversity/threatened/species/pubs/6780-conservation-advice.pdf|publisher=Australian Government Department of the Environment|accessdate=25 February 2018}} External links
5 : Microtis (plant)|Prasophyllinae|Endemic orchids of Australia|Orchids of Western Australia|Plants described in 1984 |
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