| 词条 | Prasophyllum diversiflorum |
| 释义 |
| name = Gorae leek orchid | image = | image_caption = | status_system = EPBC | status = EN | taxon = Prasophyllum diversiflorum | authority= Nicholls[1] | display_parents = 3 }} Prasophyllum brevilabre, commonly known as the Gorae leek orchid, is a species of orchid endemic to south-western Victoria. It has a single tubular, green leaf and up to forty greenish-brown flowers with reddish markings. It is a very rare orchid, now only known from two small, scattered populations. It was first recorded from Gorae West near Portland but is no longer found there. DescriptionPrasophyllum diversiflorum is a terrestrial, perennial, deciduous, herb with an underground tuber and a single tapering, tube-shaped leaf up to {{convert|450|mm|in|sigfig=1|abbr=on}} long and {{convert|4-10|mm|in|sigfig=1|abbr=on}} wide at the base. Between ten and forty scented flowers are crowded along a flowering spike {{convert|80-150|mm|in|sigfig=1|abbr=on}} long. The flowers are up to {{convert|10|mm|in|sigfig=1|abbr=on}} wide and greenish-brown with reddish markings. As with others in the genus, the flowers are inverted so that the labellum is above the column rather than below it. The dorsal sepal is egg-shaped, up to {{convert|7|mm|in|sigfig=1|abbr=on}} long with a pointed tip. The lateral sepals are lance-shaped, {{convert|6-10|mm|in|sigfig=1|abbr=on}} long, curved and free from each other. The petals are narrow linear in shape and {{convert|6-9|mm|in|sigfig=1|abbr=on}} long. The labellum is egg-shaped, white to pinkish, dished and {{convert|6-9|mm|in|sigfig=1|abbr=on}} long. It is turns upward near its middle and its edges are wavy. Flowering occurs from December to January.[1][2][3]Taxonomy and namingPrasophyllum diversiflorum was first formally described in 1942 by William Henry Nicholls and published the description in The Victorian Naturalist from a specimen collected from Gorae West.[4][5] The specific epithet (diversiflorum) is derived from the Latin words diversus meaning "diverse" or "different"[6]{{rp|264}} and florum, the plural of flora meaning "flower".[6]{{rp|337}} Nicholls noted [this species] "is probably the most variable, in regard to the floral characters, on record...".[5]Distribution and habitatThe Gorae leek orchid occurs in south-western Victoria, growing in grassland and sedgeland which is often flooded in winter. It is only known from two small populations {{convert|90|km|mi|sigfig=1|abbr=on}} apart.[1][3] ConservationPrasophyllum diversiflorum is classified as Threatened under the Victorian Flora and Fauna Guarantee Act 1988 and as Endangered under the Commonwealth Government Environment Protection and Biodiversity Conservation Act 1999 (EPBC) Act. The main threats to the species are weed invasion, grazing and trampling, vehicle movement and roadside maintenance.[3][7]References1. ^1 {{cite web|last1=Jeanes|first1=Jeff|title=Prasophyllum diversiflorum|url=https://vicflora.rbg.vic.gov.au/flora/taxon/2fba6b5d-3b5f-45ce-b19c-87f3c259989d|publisher=Royal Botanic Gardens Victoria - vicflora|accessdate=10 November 2017}} 2. ^{{cite book|last1=Mayfield|first1=Enid|title=Flora of the Otway plain & ranges.|date=2010|publisher=CSIRO Publishing|location=Collingwood, Victoria|isbn=9780643098046|page=136|edition=2nd}} 3. ^1 2 {{cite web|title=Conservation advice - Prasophyllum diversiflorum|url=http://www.environment.gov.au/biodiversity/threatened/species/pubs/13210-conservation-advice-01042016.pdf|publisher=Australian Government Department of the Environment|accessdate=10 November 2017}} 4. ^1 {{cite web|title=Prasophyllum diversiflorum|url= https://id.biodiversity.org.au/instance/apni/507585|publisher=APNI|accessdate=10 November 2017}} 5. ^1 {{cite journal|last1=Nicholls|first1=William H.|title=Additions to the Orchidaceae of Victoria|journal=The Victorian Naturalist|date=1942|volume=59|pages=8–9|url=https://www.biodiversitylibrary.org/item/125726#page/14/mode/1up|accessdate=10 November 2017}} 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.}} 7. ^{{cite web|title=Action statement: Gorae Leek Orch (Prasophyllum diversiflorum)|url=https://www.environment.vic.gov.au/__data/assets/pdf_file/0014/32612/Gorae_Leek-orchid_Prasophyllum-diversiflorum.pdf|publisher=Victorian Government Department of Sustainability and Environment|accessdate=10 November 2017}} External links
4 : Prasophyllum|Flora of Victoria (Australia)|Endemic orchids of Australia|Plants described in 1942 |
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