Casuarina stricta Ait.

Japanese: モクマオウ（英語表記）Casuarina stricta Ait.

An evergreen tall tree of the Casuarinae family with a unique branch shape resembling an enlarged horsetail. A dicotyledonous plant native to Australia. Also known as Ogasawara pine. The twigs are thin and gray-green with many thin vertical grooves and prominent knots. The leaves are small and scale-like, arranged in whorls of 9 to 12 leaves, which are fused together at the base to form a sheath around the node. Monoecious. A long and slender male inflorescence is borne at the end of the branch, and a male flower consisting of one stamen surrounded by two bracts and two perianths is borne in the axil of the bract whorl. The female flower forms an almost spherical inflorescence at the end of a short stalk, and one pistil is enclosed in two bracts in the axil of the bract.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

枝がトクサを大きくしたような特異な形態になるモクマオウ科の常緑高木。双子葉植物で，オーストラリア原産。オガサワラマツともいわれる。小枝は細く灰緑色で，縦に多数の細い溝があり，著しい節がある。葉は小さい鱗片状で9～12枚が輪生するが，基部は互いに合着し，節をとりまく鞘となっている。雌雄同株。枝先に細長い雄花序を生じ，輪生する苞の腋（えき）に2小苞2花被に囲まれた1本のおしべからなる雄花をつける。雌花は短い柄の先に，ほぼ球形の花序をなし，苞の腋に2小苞に包まれて1本のめしべがある。

出典　株式会社平凡社世界大百科事典第２版について　情報

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