An evergreen tree of the family Barringtaceae, native to the tropical regions of northern South America. It grows to a height of 20-30m, with a trunk that can reach a diameter of 50-80cm. The leaves are large and oval, and grow alternately at the ends of the branches. The flowers are so-called trunk-grown flowers, and a 20-50cm long inflorescence (branch) grows from the thick trunk, with numerous yellow-orange flowers at the end of the inflorescence, each about 10cm in diameter. There are six petals, and six outer sepals. The bases of both the petals and the stamens are fleshy and thick. After flowering, a hard, spherical fruit about 20cm in diameter hangs directly from the trunk. This appearance resembles a cannonball, hence the English name Cannonball Tree, which is translated into Japanese as Hougamboku or Hougannoki. It is planted in botanical gardens throughout the tropics. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
サガリバナ科の常緑高木で,南アメリカ北部の熱帯に産する。高さ 20~30mに達し,幹は径 50~80cmにもなる。葉は大型の楕円形で枝先に集って互生する。花はいわゆる幹生花で,太い幹から長さ 20~50cmほどの花序軸 (枝) を出し,その先に径 10cmあまりで黄橙色の花を総状に多数つける。花弁は6枚,外側にある萼片も6枚である。花弁,おしべの基部はともに肉質に肥厚する。花後,径 20cmほどの硬い球形の果実を幹に直接ぶらさげる。この様子を大砲の弾丸に見立てキャノンボールツリーの英名があり,その訳としてホウガンボクまたはホウガンノキの和名がある。熱帯各地の植物園などに植えられている。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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