Azolla
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A floating aquatic fern of the Azollaceae family. The leaves are about 1.5 mm long. They are found from the southwestern part of Honshu to Okinawa. They grow on the water surface of ponds, swamps, rice fields, etc., and grow densely, turning the water surface deep red. Small leaves like those of cypress grow densely on branched stems. The leaves are divided into dorsal and ventral parts, and bear one large and one small sporangiocarp at the base. Source : Heibonsha Encyclopedia About MyPedia Information |
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アカウキクサ科の浮遊性の水生シダ。葉は長さ約1.5mm。本州の南西部から沖縄に分布。池，沼，水田などの水面に生じ，密に繁殖して水面を真赤にする。分枝した茎にヒノキの葉のように小さい葉が密生する。葉は背と腹に分かれ，基部に大小各１個の胞子嚢果をつける。
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