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・ Najarpur
・ Najas
・ Najas ancistrocarpa
・ Najas filifolia
・ Najas flexilis
・ Najas gracillima
・ Najas graminea
・ Najas grossareolata
・ Najas guadalupensis
・ Najas hagerupii
・ Najas halophila
・ Najas indica
・ Najas kurziana
・ Najas madagascariensis
・ Najas marina
Najas minor
・ Najas pseudogracillima
・ Najas tenuifolia
・ Najas tenuis
・ Najas wrightiana
・ Najasa
・ Najasa Municipal Museum
・ Najasa River
・ Najash
・ Najat
・ Najat Aatabou
・ Najat Al Saghira
・ Najat El Garaa
・ Najat El Hachmi
・ Najat El-Khairy


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Najas minor : ウィキペディア英語版
Najas minor

''Najas minor'', known as brittle naiad or brittle waternymph, is an annual aquatic plant, a submersed herb. It is native to Europe, Asia and North Africa from the Netherlands to Morocco east to Japan and the Philippines, including China, Siberia, Central Asia, Iran, Turkey, Ukraine, Germany, France Italy and a host of other Countries.〔(Kew World Checklist of Selected Plant Families, ''Najas minor'' )〕 It is now introduced to North America and considered a weedy invasive species in the eastern half of the United States from Florida to Oklahoma to New Hampshire to Ontario to South Dakota.〔(Biota of North America Project, ''Najas minor'' )〕 This plant prefers calm waters, such as ponds, reservoirs, and lakes, and is capable of growing in depths up to 4 meters.
==Identification==
''Najas minor'' grows in dense clusters and has highly branched stems. These stems fragment easily and this plant is capable of propagation from stem fragments or from small seeds which grow along its stem. The small flowers are located in clusters along the leaf axils. The leaves of the plant are opposite, unbranched, strap-shaped, and are around 4.5 centimeters in length. The leaves have serrations which are visible to the naked eye. This plant is similar in morphology to coontail or slender naiad.〔Carlo Allioni. 1773. Auctarium ad Synopsim Methodicam Stirpium Horti Reg. Taurinensis 3, ''Najas minor''〕〔Carlo Allioni. 1774. Mélanges Philos. Mat. Soc. Roy. Turin 5: 55, ''Najas minor''〕〔N.Z.Wang. 1985. Journal of Wuhan Botanical Research 3(1): 31, ''Najas moshanensis''〕

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