| 词条 | Pterostylis planulata |
| 释义 |
| name = Flat rustyhood | image = Pterostylis planulata.jpg | image_caption = Pterostylis planulata growing in the Grampians National Park | status_system = | status = | genus = Pterostylis | species = planulata | authority = D.L.Jones & M.A.Clem.[1] | synonyms_ref = [1] | synonyms = Oligochaetochilus planulatus (David L. Jones & M.A.Clem.) D.L.Jones & M.A.Clem. }} Pterostylis planulata, commonly known as the flat rustyhood, is a plant in the orchid family Orchidaceae and is endemic to Victoria. It has a rosette of leaves at its base and up to seven translucent flowers with green stripes. The flowers have a thin, dark green, insect-like labellum. DescriptionPterostylis planulata, is a terrestrial, perennial, deciduous, herb with an underground tuber. It has a rosette of between five and eight leaves at the base of the flowering spike, each leaf {{convert|18-300|mm|in|sigfig=1|abbr=on}} long and {{convert|5-8|mm|in|sigfig=1|abbr=on}} wide. The leaves are often withered by the time of flowering. Up to seven translucent flowers with green stripes and {{convert|30-35|mm|in|sigfig=2|abbr=on}} long, {{convert|9-11|mm|in|sigfig=2|abbr=on}} wide are borne on a flowering spike {{convert|100-200|mm|in|sigfig=1|abbr=on}} tall. Three or four stem leaves are wrapped around the flowering spike. The dorsal sepal and petals are joined to form a hood called the "galea" over the column with the dorsal sepal having a thread-like tip {{convert|20-30|mm|in|sigfig=1|abbr=on}} long. The lateral sepals are slightly wider than the galea, densely hairy on their outer edges and suddenly taper to a thread-like tip, {{convert|20-35|mm|in|sigfig=1|abbr=on}}. The tips of the lateral sepals are more or less parallel to each other and about {{convert|10|mm|in|sigfig=1|abbr=on}} apart. The labellum is thin, green and insect-like, about {{convert|6-7|mm|in|sigfig=1|abbr=on}} long and {{convert|3|mm|in|sigfig=1|abbr=on}} wide. The "head" end has two long bristles and there are 18 to 24 shorter bristles on the side. Flowering occurs from October to November.[1][2][3]Taxonomy and namingPterostylis planulata was first formally described in 1983 by David Jones & Mark Clements and the description was published in Muelleria. The type specimen was collected in the northern end of the Grampians National Park.[4][1] The specific epithet (planulata) is derived from the Latin word planus meaning "level" or "flat"[5] referring to the almost flat, sometimes shallowly dished, lateral sepals.[1]Distribution and habitatThe flat rustyhood is only known from the northern part of the Grampians National Park where it grows in shallow soil on rock ledges.[2][3] References1. ^1 2 {{cite journal|last1=Jones|first1=David L.|last2=Clements|first2=Mark A.|title=New species of Pterostylis R.Br. (Orchidaceae) from Victoria and New South Wales|journal=Muelleria|date=1993|volume=8|issue=1|pages=81–82}} {{Taxonbar|from=Q15492846}}2. ^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 =327}} 3. ^1 {{cite web|last1=Jeanes|first1=Jeff|title=Pterostylis planulata|url=https://vicflora.rbg.vic.gov.au/flora/taxon/e642999e-7e37-411c-be17-8d4318dc29b3|publisher=Royal Botanic Gardens Victoria: vicflora|accessdate=24 May 2017}} 4. ^1 2 {{cite web|title=Pterostylis planulata|url=https://id.biodiversity.org.au/instance/apni/553177|publisher=APNI|accessdate=12 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 = 474}} 4 : Pterostylis|Endemic orchids of Australia|Orchids of Victoria (Australia)|Plants described in 1983 |
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