あさのはかえで (麻の葉楓) [Index] [Back] わが国の本州、福島・新潟県以西から四国に分布しています。山地の谷間などに生え、高さは５〜１０メートルになります。樹皮は平滑な灰褐色から灰色で、皮目が点在します。葉は掌状に５〜７裂し、対生します。表面はしわが目立ち、「あさ（麻）」の葉に似ています。雌雄異株で、５月から６月ごろ、短い総状花序をだし、淡黄緑色の花を咲かせます。果実は翼果で８月から１０月に熟し、翼はほとんど水平に開きます。 カエデ科カエデ属の落葉小高木で、学名は Acer argutum。英名はありません。 The "Asanoha-kaede" (Acer argutum) belongs to Aceraceae (the Maple family). It is a semi-tall deciduous tree that is native to Japan from Fukushima and Niigata prefectures to the west end of Honshu, as well as the island of Shikoku. This tree grows in montane dales and can reach 5-10 m in height. The bark is smooth, grayish-brown to gray, and pockmarked with lenticels. The leaves are palmately divided into 5-7 lobes and opposite. They look like hemp (Cannabis sativa) leaves, and the surfaces are wrinkled. This tree is dioecious. The pale yellowish-green flowers bloom on short racemes from May to June. The fruits are samaras and ripen in August to October. The wings spread out to almost 180 degrees. (edit by Greg Brockelbank) 岐阜県中津川市「神坂峠」にて、2007年05月07日撮影。 Shu Suehiro shu@botanic.jp