Acer nipponicum, occasionally called the Nippon maple, is a species of maple native to Japan. It belongs to the Acer section Parviflora.
Acer nipponicum is a medium-sized deciduous tree, growing to between 15–20 metres (49–66 ft)[2] and averaging 18 metres (59 ft) tall.[3] The branches and trunk have a smooth grey bark, while young twigs are a smooth, slightly lustrous dark green.[3] The flowers of A. nipponicum are generally andromonoecious, but some trees in groves occasionally are androecious, having only male flowers. Wild specimens flower from about Late June and continue through late July depending on elevation, with trees growing at lower elevation starting to bloom in mid June, and some trees flowering through to early August. The species is found in mountainous regions on the islands of Honshu, Shikoku, and Kyushu in Japan at elevations ranging from 500 to 2,000 metres (1,600 to 6,600 ft). The northernmost groves are near Mount Hachimantai and Mount Iwate in Iwate Prefecture on Honshu. The southernmost groves are in the southeast corner of Kumamoto Prefecture on Kyushu.[3]
A ribosomal DNA study of Acer species in 2006 placed A. nipponicum along with the related A.caudatum near the base of the phylogenetic trees recovered.[4] A. nipponicum is suggested to be closely related to two of the extinct species of Acer placed in the section Parviflora by paleobotanists Jack Wolfe and Toshimasa Tanai.[5] The species A. browni and A. smileyi were both described by Wolfe and Tanai in 1987 from groups of fossils found in western North America. The slightly older species A. smileyi is suggested by Wolfe and Tanai to have been closer in relation to A. nipponicum than A. browni based on the leaf morphology.[5]
The species was first described by Adrien René Franchet and Paul Amedée Ludovic Savatier as Acer parviflorum in 1877. This name was already taken, having been used in the earlier description of Acer parviflorum by Jakob Friedrich Ehrhart, which in turn is a synonym of Acer spicatum. Noting this situation, in 1938 Hermann Albrecht Hesse renamed the species to Acer brevilobum, but because this renaming was published thirteen days after Hiroshi Hara published his renaming of the species to Acer nipponicum, the A. nipponicum name has priority.[3]
Acer nipponicum, occasionally called the Nippon maple, is a species of maple native to Japan. It belongs to the Acer section Parviflora.
Acer nipponicum é uma espécie de árvore do gênero Acer, pertencente à família Aceraceae.[1]
Acer nipponicum là một loài thực vật có hoa trong họ Bồ hòn. Loài này được H.Hara mô tả khoa học đầu tiên năm 1938.[1]
Acer nipponicum là một loài thực vật có hoa trong họ Bồ hòn. Loài này được H.Hara mô tả khoa học đầu tiên năm 1938.
テツカエデ（鉄楓、学名：Acer nipponicum）はカエデ科カエデ属の落葉高木。同じ株に両性花と雄花が出る雄性同株、ときに両性花の株と雄花の株が別にある雄性異株。カエデ科は、新しいAPG植物分類体系ではムクロジ科に含められている。
樹高は10mから18mに達する。冬芽の鱗片は2対ある。今年枝には褐色の毛が密生するが、後に落ちる。葉は長さ2-11cmの葉柄をもって対生する。葉身は5角形で、長さ6-15cm、幅5-16cm、3-5浅裂し、裂片の先端は尾状、基部は浅心形から切形になり、縁には細かく鋭い重鋸歯がある。葉の表面は無毛で葉脈は窪み、裏面の脈腋と脈上に赤褐色の縮毛が生え、ときに裏面全面に短毛が密生する。
花期は6-8月。長さ10-20cmの円柱形の花序を有花枝の先端から下垂させる。花は花序に400-1000個つき、黄緑色になる。花弁、萼片は5個、雄蕊は8個ある。子房には赤褐色の短毛が密生し、2分する花柱は鉤状に外曲する。果期は8-10月。果実は翼果で2個の分果からなり、分果の長さは2.5-3.5cmになる。
日本固有種。本州の岩手県・秋田県以南、四国および九州に分布し、温帯の山地の沢沿いから山地中腹に生育する。
この項目は、植物に関連した書きかけの項目です。この項目を加筆・訂正などしてくださる協力者を求めています（プロジェクト:植物／Portal:植物）。 テツカエデ（鉄楓、学名：Acer nipponicum）はカエデ科カエデ属の落葉高木。同じ株に両性花と雄花が出る雄性同株、ときに両性花の株と雄花の株が別にある雄性異株。カエデ科は、新しいAPG植物分類体系ではムクロジ科に含められている。
