| 词条 | Apostasia wallichii |
| 释义 |
| name = Yellow grass orchid | image = Apostasia wallichii (2).jpg | image_caption = Apostasia wallachii growing near Cairns | regnum = Plantae | unranked_divisio = Angiosperms | unranked_classis = Monocots | ordo = Asparagales | familia = Orchidaceae | subfamilia = Apostasioideae | genus = Apostasia | species = A. wallichii | binomial = Apostasia wallichii | binomial_authority = R.Br.[1] | synonyms_ref =[1] | synonyms =
|}} Apostasia wallichii, commonly known as the yellow grass orchid,[2] is a species of orchid that is native to India, Japan, China, Southeast Asia, New Guinea and northern Australia. It has many arching, dark green, grass-like leaves and up to forty small, star-like yellow flowers arranged on a branched flowering stem. It mainly grows in wet forest and rainforest. DescriptionApostasia wallichii is a terrestrial, tuberous, evergreen herb, scarcely recognisable as an orchid. It has wiry, branched roots with fleshy, warty projections and an erect, fibrous stem with many grass-like leaves arranged in whorls along it. The leaves are dark green, thin and leathery {{convert|100-200|mm|in|sigfig=1|abbr=on}} long and up to {{convert|1|mm|in|sigfig=1|abbr=on}} wide. Between five and forty star-like, yellow flowers, {{convert|8-10|mm|in|sigfig=1|abbr=on}} wide are arranged on branched flowering stems {{convert|50-100|mm|in|sigfig=1|abbr=on}} long and arising from leaf axils. The three sepals and three petals are all similar in size ({{convert|4-6|mm|in|sigfig=2|abbr=on}} long, {{convert|1-1.5|mm|in|sigfig=1|abbr=on}} wide), shape (narrow triangular) and colour. Flowering occurs between December and March in Australia and in August in China.[2][3][4][5]Taxonomy and namingApostasia wallichii was first formally described in 1830 by Robert Brown. Brown's manuscript was published in Nathaniel Wallich's book, Plantae Asiaticae Rariores.[1][6] The specific epithet (wallichii) honours Nathaniel Wallich.[6]Distribution and habitatThe yellow grass orchid grows in tropical forest and rainforest, sometimes near streams at altitudes of up to {{convert|1000|m|ft|sigfig=1|abbr=on}}. It is found in Hainan, south-west Yunnan, Bangladesh, Cambodia, India, Indonesia, southern Japan, Nepal, Malaysia, Myanmar, Sri Lanka, Thailand, Vietnam, the Philippines, New Guinea and Queensland where if occurs between Bamaga and Ingham.[2][3][5] References1. ^1 2 {{WCSP | 13373 | Apostasia wallachii }} {{Commons}}{{Taxonbar|from=Q145943}}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|page =352}} 3. ^1 {{cite web |title=Apostasia wallichii |url=http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=242420461 |publisher=Flora of China |accessdate=6 September 2018}} 4. ^{{cite web |title=Apostasia stylidioides |url=http://keys.trin.org.au/key-server/data/08090a09-0d0e-410b-860c-020705070e0e/media/Html/Apostasia_stylidioides.htm |publisher=Trin keys: Australian Tropical Rainforest Orchids |accessdate=6 September 2018}} 5. ^1 {{cite web |title=Apostasia wallichii |url=http://www.orchidsnewguinea.com/orchid-information/species/speciescode/1609 |publisher=Orchids of New Guinea |accessdate=6 September 2018}} 6. ^1 {{cite book |last1=Wallich |first1=Nathaniel |title=Plantae Asiaticae Rariores |date=1830 |location=London |pages=75–76 |url=https://www.biodiversitylibrary.org/item/9714#page/170/mode/1up |accessdate=6 September 2018}} 11 : Apostasia (plant)|Plants described in 1830|Orchids of Queensland|Orchids of China|Orchids of India|Orchids of Indonesia|Orchids of Japan|Orchids of Malaysia|Orchids of New Guinea|Orchids of the Philippines|Orchids of Vietnam |
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