blade sheath

• 叶鞘

blade sheath的用法和样例：

例句

1. In grasses the ligule occurs at the junction of the leaf sheath and lamina.
   在禾本科植物中，叶舌生长在叶鞘和叶片的交界处。
2. The leaf sheath enclosing the lowest two internodes should be stiff too.
   包裹最低两个茎节的叶鞘也应坚硬。