…When the leaf primordium grows a little, the upper and lower parts become clearly defined, and the lower leaf base produces the leaf sheath and stipules, while the upper leaf produces the leaf blade and petiole. Leaf sheaths are commonly found in monocotyledonous plants, and protect the young leaves and growing points. Leaf sheaths are rare in dicotyledonous plants, but are well developed in buttercups and nandina. … *Some of the terminology that mentions "leaf sheath" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…葉原基は少し大きくなると上下の二つの部分がはっきりしてきて,下部の葉基からは葉鞘(ようしよう)と托葉,上部の上葉から葉身と葉柄がつくられる。葉鞘leaf sheathは単子葉植物によくみられるもので,幼葉や生長点を保護している。双子葉植物には葉鞘は珍しいが,キンポウゲやナンテンなどには発達している。… ※「leaf sheath」について言及している用語解説の一部を掲載しています。 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 |
<<: Leaf scar (English spelling)
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