含笑属植物的导管分子大多具有梯状穿孔板，仅有一种可看到单穿孔板。
In contrast, most of the Michelia species possess scalariform perforation plates and only one with simple perforation.
木莲属的所有种中都有具梯状穿孔板的导管分子，但在少数种中偶然可见到单穿孔。
Manglietia species all have scalariform perforation plates, only a few also have simple perforations.
在导管分子中，存在着梯状穿孔板、网状穿孔板、混合型穿孔板和单穿孔板；
The form of the perforation plates in the typical vessels are various, divide into several subtypes:scalariform perforation plates, reticulate perforation plates.
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