Japanese maple - Japanese maple

Japanese: イロハモミジ - いろはもみじ

A deciduous tall tree of the maple family (APG classification: Sapindaceae). It is also called Japanese maple or Takao maple. The leaves are opposite, the petiole is 2-4 cm long, the blade is 4-7 cm long and wide, palmately divided into 5-7 lobes, and the edges are roughly serrated. The winter buds have 4-5 pairs of scales. Monoecious. In April and May, 10-20 small flowers, each about 5 mm in diameter, bloom in a corymb-like panicle. There are 5 pale yellowish-white petals, 5 red sepals, and 8 stamens. The fruit has two wings and ripens in autumn. It is distributed in the temperate to subtropical zones of Honshu west of Fukushima Prefecture, Shikoku, Kyushu, southern Korea, and eastern China. This is the maple tree most commonly planted in gardens, and many cultivars have been created. The name comes from the game of counting the leaf lobes in alphabetical order. Takao maple is named after Takao, a famous maple spot in Kyoto. The autumn leaves are beautiful.

[Ken Ogata September 17, 2020]

Japanese maple
This is the maple tree most commonly planted in gardens, and there are many horticultural varieties. The leaves are palmately divided into 5 to 7 lobes, with coarse double serrations on the edges. The branches are thin and tend to spread out horizontally. Also known as Japanese maple and Takao maple. ©Seishohmaru ">

Japanese maple

Japanese maple flower
From April to May, small flowers measuring about 5 mm in diameter bloom in a panicle-like inflorescence. The five red sepals are conspicuous. ©Seishohmaru ">

Japanese maple flower

Acer palmatum fruit
They have two flat wings and can be carried far away by the wind. They ripen in the autumn when the leaves turn red. ©Seishohmaru ">

Acer palmatum fruit

Autumn leaves of Japanese maple
It is found from Fukushima Prefecture westward and turns beautiful red in autumn. ©Seishohmaru ">

Autumn leaves of Japanese maple

Japanese maple (tree shape)
©Junzo Fujishima ">

Japanese maple (tree shape)

Major types of maples (1) [specimen illustrations]
© Hiroki Sato ">

Major types of maples (1) [specimen illustrations]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

カエデ科（APG分類：ムクロジ科）の落葉高木。イロハカエデ、タカオカエデともいう。葉は対生し、葉柄は2～4センチメートル、葉身は長さ、幅ともに4～7センチメートルで掌状に5～7裂し、縁(へり)に粗い重鋸歯(じゅうきょし)がある。冬芽の鱗片(りんぺん)は4～5対。雌雄同株。4～5月、径約5ミリメートルの小花が10～20個、散房状円錐(えんすい)花序に開く。花弁は淡黄白色で5枚、萼片(がくへん)は紅色で5枚、雄しべは8本。果実は2翼があり、秋に熟す。福島県以西の本州、四国、九州、朝鮮南部、中国東部の温帯から暖帯に分布する。庭園にもっともよく植えられるカエデで、多数の園芸品種がつくりだされている。名は、葉の裂片をイロハ順に数える遊びに由来する。またタカオカエデは京都のカエデの名所、高雄にちなむ。秋の紅葉が美しい。

［緒方　健　2020年9月17日］

イロハモミジ
庭園にもっともよく植栽されるカエデで、多くの園芸品種がある。葉は掌状に5～7裂し、縁に粗い重鋸歯がある。枝は細く、横に張りやすい。別名イロハカエデ、タカオカエデ©Seishohmaru">

イロハモミジ

イロハモミジの花
4～5月、径約5mmの小花を散房状円錐花序に開く。紅色の5枚の萼片が目だつ©Seishohmaru">

イロハモミジの花

イロハモミジの果実

イロハモミジの紅葉

イロハモミジ〔樹形〕

カエデのおもな種類(1)〔標本画〕

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