| 词条 | Cyperus polystachyos |
| 释义 |
|name = Bunchy sedge |image = Pycreus.jpg |status = LC |status_system = IUCN3.1 |status_ref = [1] |genus = Cyperus |species = polystachyos |authority = Rottb. |synonyms_ref=[2] |synonyms=*Pycreus polystachyos (Rottb.) P.Beauv.
|}}Cyperus polystachyos, also known as Pycreus polystachyos and commonly known as bunchy sedge,[2] many-spiked sedge, or Texas sedge,[4] is a herbaceous species in the family Cyperaceae, widespread in tropical and subtropical areas around the world, sometimes extending its range into temperate regions. In the United States, it has been reported from a region from Texas to Maine.[3][4][5][6] It is common in the Neotropics as a weed in grass lawns. The rhizomatous perennial or annual grass-like sedge typically grows to a height of {{convert|0.15|to|0.6|m|ft|1}}. It blooms between summer and winter and produces green-brown flowers.[2] The stems are rigid with a thickness of {{convert|1|to|3|mm|in|3}}. Stems are glabrous with a triangular cross-section. The leaves are very narrow, around {{convert|1|to|4|mm|in|3|abbr=on}} with a grass-like appearance and are often tufted at the base of the plant. The seed-head is an irregular cluster formation at the tip of the stem with brown spikes that have three to six green leafy bracts underneath.[7] The species is widespread in warmer climates and found from sea level to an altitude of around {{convert|1020|m|ft|0}}. The species is found along rivers and creeks in a range of ecosystems from rainforest, melaleuca forest, vine thickets, eucalypt forest and swamps in a variety of woodland and grassland areas including in salty mud and marshes of the ocean shore.[8] In Australia the species is found mostly in coastal location, north of Perth in Western Australia[2] and through the Northern Territory, Queensland and New South Wales.[7] References1. ^Rehel, S. (2013). Cyperus polystachyos. The IUCN Red List of Threatened Species 2013: e.T164195A19089068. https://doi.org/10.2305/IUCN.UK.2013-1.RLTS.T164195A19089068.en. Downloaded on 27 October 2018. {{Taxonbar|from=Q1637688}}{{Cyperaceae-stub}}2. ^1 2 {{FloraBase|name=Cyperus polystachyos|id=806}} 3. ^1 Kew World Checklist of Selected Plant Families 4. ^{{cite web|title=Cyperus polystachyos|url=http://plants.usda.gov/core/profile?symbol=CYPO|website=plants.usda.gov|publisher=USDA|accessdate=27 June 2014}} 5. ^Biota of North America Program, 2013 county distribution map 6. ^Flora of North America, Vol. 23 Page 160, Cyperus polystachyos Rottbøll, Descr. Pl. Rar. 21. 1772. 7. ^1 2 {{cite web|url=https://weeds.brisbane.qld.gov.au/weeds/bunchy-sedge|title=bunchy sedge Cyperus polystachyos|work=Weed Identification tool|accessdate=6 October 2017|publisher=Brisbane City Council}} 8. ^{{cite web|url=http://keys.trin.org.au/key-server/data/0e0f0504-0103-430d-8004-060d07080d04/media/Html/taxon/Cyperus_polystachyos.htm|title=Cyperus polystachyos|accessdate=6 October 2017|work=Australian Tropical Rainforest Plants|publisher=Lucid Key Server}} 8 : Cyperus|Flora of Africa|Flora of North America|Flora of South America|Flora of Asia|Flora of Madagascar|Flora of Australia|Plants described in 1773 |
| 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。