| 词条 | Pterostylis lustra |
| 释义 |
| name = Small sickle greenhood | image = Pterostylis lustra.jpg | image_caption = Pterostylis lustra growing in western Victoria | genus = Pterostylis | species = lustra | authority = D.L.Jones[1] | synonyms_ref = | synonyms = }} Pterostylis lustra, commonly known as the small sickle greenhood, is a species of orchid endemic to south-eastern Australia. Flowering plants have three to five bright green leaves at the base of the flowering stem and a single green and white, sickle-shaped flower. DescriptionPterostylis lustra is a terrestrial, perennial, deciduous, herb with an underground tuber. Flowering plants have between three and five bright green, egg-shaped to lance-shaped leaves in a loose group at base of the flowering stem, each leaf 20–60 mm long and 8–15 mm wide. A single flower 30–50 mm long and 20–27 mm wide is borne on a spike 80–200 mm high. The flowers are green, white and sickle-shaped. The dorsal sepal and petals are fused, forming a hood or "galea" over the column but the dorsal sepal is longer than the petals and tapers to a point. The lateral sepals are erect with a gap between them and the galea, have thread-like tips 20-30mm long and there is a broad notch in the sinus between them. The labellum is dark-coloured, blunt, 15–25 mm long, about 3 mm wide and protrudes above the sinus. Flowering occurs from late October to February.[1][2][3]Taxonomy and namingPterostylis lustra was first formally described in 2006 by David Jones from a specimen collected in the Wilsons Promontory National Park and the description was published in Australian Orchid Research.[4] The specific epithet (lustra) is a Latin word meaning "illuminate" or "light up".[5]Distribution and habitatThe small sickle greenhood is locally common in the southern half of Victoria where it grows in wet, swampy areas under Leptospermum lanigerum. It also occurs in northern Tasmania and in the south-east of South Australia.[1][2][3] ConservationPterostylis lustra is classified as "endangered' under the Tasmanian Government Threatened Species Protection Act 1995.[3]References1. ^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=978-1877069123|page =308}} {{Taxonbar|from=Q15492689}}2. ^1 {{cite web|last1=Jeanes|first1=Jeff|title=Pterostylis lustra|url=https://vicflora.rbg.vic.gov.au/flora/taxon/1d3c73d0-f645-4c73-9128-6cd0bb49d342|publisher=Royal Botanic Garden melbourne: vicflora|accessdate=18 May 2017}} 3. ^1 2 {{cite web|title=Pterostylis lustra|url=https://www.naturalvaluesatlas.tas.gov.au/downloadattachment?id=16123|publisher=Tasmanian Government Department of Primary Industries, Parks, Water and Environment|accessdate=18 May 2017}} 4. ^1 {{cite web|title=Pterostylis lustra|url=https://id.biodiversity.org.au/instance/apni/616370|accessdate=18 May 2017}} 5. ^{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|page = 480}} 6 : Pterostylis|Endemic orchids of Australia|Orchids of South Australia|Orchids of Victoria (Australia)|Orchids of Tasmania|Plants described in 2006 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。