A species of the genus Peacock palm in the family Palmaceae (APG classification: Palmaceae). The trunk is erect and single, reaching a height of 20 meters. The leaves are 5 to 6 meters long, glossy dark green, and twice-lobed pinnate. The leaflets are V-shaped (inwardly convoluted) in cross section. Usually, the leaflets of pinnate leaves in the palm family are inverted V-shaped (outwardly convoluted), but only two genera, Peacock palm and Phoenix palm, have V-shaped pinnate leaflets in cross section. The flowers are unisexual, with female flowers blooming the year after the male flowers. The spadix is 3 meters long and hangs down in a bead-like bundle. The fruit is globular, 1.5 to 2 cm in diameter, dark blue or reddish brown. The seeds are globular and glossy black. The inflorescence forms buds between the petiole and the annular nodes where the petiole attaches; during the flowering season, the topmost bud blooms and gradually spreads to the lower nodes, and once the bottommost nodes have finished flowering and fruiting, the entire plant dies. When the stalk is cut, sap comes out, which can be consumed as a beverage, boiled down to sugar, and fermented to make palm wine. Sago starch can be extracted from the pith. The closely related common toad palm, C. mitis Lour., grows in Malaysia and Myanmar (Burma); its trunk branches from the base and does not die even when it reaches flowering age. There are about 27 species of the genus Toddy Palm distributed in tropical Asia, New Guinea and Australia, and they are classified by leaf shape, with some single-trunked ones having huge leaves. They come in single-trunked and clumping varieties, and are usually 7.5 meters tall, but the single-trunked ones have much larger trunks and leaves. They are used for indoor decoration and should be kept above 0℃. [Toshihiko Satake April 16, 2019] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
ヤシ科(APG分類:ヤシ科)クジャクヤシ属の1種。幹は直立する単幹で高さ20メートル。葉は長さ5、6メートルで光沢のある暗緑色を呈し、2回全裂羽状葉。小葉は横断面がV字状(内向鑷合(じょうごう)状)をなす。通常、ヤシ科の羽状葉の小葉は逆V字状(外向鑷合状)であるが、羽状葉小葉の横断面がV字状のものはクジャクヤシとフェニックスの2属だけである。単性花で雄花の翌年に雌花が開花する。肉穂花序は長さ3メートルで数珠(じゅず)状の束をなして下垂する。果実は球形で径1.5~2センチメートル、暗青色または赤褐色。種子は球形で光沢のある黒色。花序は葉柄着生部の環状節で葉柄との間につぼみをつけ、開花期に最上部のつぼみから開花し始め徐々に下方の環節にわたって開花し、最下部の開花、結実が終わると全体が枯死する。花柄を切断すると樹液が出るが、これは飲料となり、煮つめると砂糖になり、発酵させるとヤシ酒にもなる。髄からはサゴデンプンがとれる。近縁のコモチクジャクヤシC. mitis Lour.はマレーシア、ミャンマー(ビルマ)に生育し、幹は根元から分枝し、開花樹齢に達しても全体が枯れることはない。 クジャクヤシ属は熱帯アジア、ニューギニア、オーストラリアに約27種分布し、葉形によって分類され、単幹のものには巨大な葉をつけるものもある。単幹と叢生(そうせい)があり、高さは普通7.5メートルであるが、単幹のほうが幹も葉もはるかに大きい。室内装飾用とされ、0℃以上に保つ。 [佐竹利彦 2019年4月16日] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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