A family of dicotyledonous plants in the Apidales order. There are 55 genera and 700 species known, mainly in the tropics, and they are particularly abundant in Southeast Asia and tropical America. Most are tall trees or shrubs, sometimes creeping or herbaceous, and some have a palm-like tree shape. The leaves are palmately compound, but sometimes palmately lobed simple leaves such as in Fatsia japonica (Eight-handed), and are usually alternate, sometimes opposite, or whorled (→phyllotaxis). The flowers are small and pentamerous, and many flowers are gathered in an umbel, often forming a globular inflorescence. The ovary is inferior, and when ripe, it becomes a berry-like drupe. In Japan, there are tall trees such as Kalopanax japonica and Fukanoki, shrubs such as Aralia aralia and Fatsia japonica, perennials such as Tochiba-ninjin (Tochiba-ninjin), and creeping plants such as Ivy (Kizuta). The buds of plants such as the elm tree and Aralia aralia are edible, Korean ginseng is well known for its medicinal properties, and ivy, alaria, and the plant commonly known as "kapok" (different from the poplar tree) are popular ornamental plants. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
双子葉植物セリ目の1科。熱帯圏を中心に 55属 700種ほどが知られ,特に東南アジアと熱帯アメリカに多く分布する。大半は高木または低木,ときにつる性や草本状,また,ヤシに似た樹形を示すものもある。葉は掌状の複葉,まれにはヤツデ (八つ手)のように掌状に裂けた単葉もあり,通常互生,ときに対生,輪生する (→葉序 ) 。花は小型で5数性,多数の花が散形に集り,多くは球形の花序をつくる。子房は下位で,熟すと液果状の核果となる。日本産のものとしてはハリギリ (針桐),フカノキなどの高木からウコギ,ヤツデなどの低木,さらにトチバニンジン (栃葉人参)などの多年草やキヅタ (木蔦)などのつる植物がある。タラノキ,ウコギなどは芽を食用にし,チョウセンニンジン (朝鮮人参)は薬用として著名であり,キヅタやアラリア,通称の「カポック」 (パンヤノキとは別) などは観葉植物として普及している。
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