| 词条 | Lemna minuta |
| 释义 |
|image = Lemnaminuta.jpg |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Monocots |ordo = Alismatales |familia = Araceae |genus = Lemna |species = L. minuta |binomial = Lemna minuta |binomial_authority = Kunth |synonyms = Lemna minuscula }}Lemna minuta is a species of duckweed known by the common name least duckweed.[1][2] It is the smallest Lemna species.[3] It is native to parts of the Americas, and naturalized in others; the exact native range is not known. It is found on other continents as a non-native introduction as well. The plant's distribution is ever-expanding; it has been spreading in Europe and it was described from Poland for the first time in 2007.[4] In many areas it is a noxious weed, such as in Belgium.[5] This tiny plant varies in shape depending on growth conditions. In the shade it is a single green translucent oval body no more than 2.5 millimeters long, and in full sunlight it generally grows in pairs. There is a central vein usually visible under magnification and microscopy. The plant produces an ephemeral membrane-bound flower. This duckweed grows in slow-moving, calm, and stagnant freshwater habitats. It affects the ecology of its habitat by forming mats on the water surface, reducing sunlight penetration and oxygen exchange.[5] References1. ^{{cite web|title=BSBI List 2007 |publisher=Botanical Society of Britain and Ireland |url=http://www.bsbi.org.uk/BSBIList2007.xls |format=xls |archive-url=https://www.webcitation.org/6VqJ46atN?url=http://www.bsbi.org.uk/BSBIList2007.xls |archive-date=2015-01-25 |accessdate=2014-10-17 |deadurl=yes |df= }} 2. ^{{PLANTS|id=LEMI6|taxon=Lemna minuta|accessdate=24 January 2016}} 3. ^Flora of Northern Ireland 4. ^Banaszek, A. and K. Musiał. (2009). The new kenophyte in Poland - Lemna minuta Humb., Bonpl., & Kunth {{webarchive|url=https://web.archive.org/web/20111004100123/http://www.ib-pan.krakow.pl/pubs-pdf/Acta%20Societatis%20Botanicorum/2009/W69_72.pdf |date=2011-10-04 }}. Acta Societatis Botanicorum Poloniae 78:1 69-72 5. ^1 Invasive Alien Species in Belgium: Lemna minuta External links
4 : Lemnoideae|Freshwater plants|Flora of North America|Plants described in 1816 |
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