ひんじも (品字藻) [Index] [Back] わが国の各地をはじめ、世界中に広く分布しています。湖沼や湿原の池塘、湧水池、河川などに生え、ふつう水中で絡み合って群生しています。葉状体は卵状楕円形で、左右から新たな葉状体が直角方向に出芽し、これが細長い柄でつながって群体を形成しています。和名は、このような葉状体のつながった形を漢字の「品」に見たてて名付けられました。夏に花を咲かせますが、開花は非常にまれであり、わが国での観察例はありません。台湾華語では「品藻」、中国語では「品藻（pin zao）」と呼ばれます。 ウキクサ科アオウキクサ属の多年草で、学名は Lemna trisulca。英名は Ivy-leaved duckweed、Star duckweed。 The Ivy-leaved duckweed (Lemna trisulca) belongs to Lemnaceae (the Duckweed family). It is a perennial herb that is widely distributed throughout Japan and around the world. It grows in lakes, marshes, ponds, spring-fed pools, and rivers, typically forming dense clusters that intertwine underwater. The thalli are ovate-elliptical in shape; new leaf-like structures sprout perpendicularly from both sides and connect via slender stalks to form a cluster. Its Japanese name was derived from the resemblance of these interconnected thalli to the Chinese character for "品". Although it blooms in summer, flowering is extremely rare, and there have been no recorded observations of it in Japan. In Taiwanese Chinese, it is called "品藻", and in Chinese, it is known as "品藻" (pinzao). 茨城県つくば市「つくば実験植物園」にて、2026年03月07日撮影。 Shu Suehiro shu@botanic.jp