“叶鞘”用英语怎么说？

在叶鞘裹住的幼叶下部呈现螺旋状.A spiral deformation occured in the lower part of the young leaf enclosed in the sheath.包裹最低两个茎节的叶鞘也应坚硬.The leaf sheath enclosing the lowest two internodes should be stiff too.本实验以高秆野生稻的幼嫩叶鞘和茎为材料.Leaf she...