From leaves cleared,oil cells are distributed in areole in most species and on the vein in some species.The oil cells in 5 species are in contact with veinlet termini.

• 从透明叶片观察，大多数植物叶片油细胞分布于脉间区，少数种的少数油细胞分布在脉上，其中5种植物的部分油细胞与叶脉末端相接触。