梯纹导管(scalariform vessel)：次生壁横条突起状增厚 网纹导管(reticulated vessel)：次生壁网状增厚。 孔纹导管(pitted vessel)：次生壁上形成许多纹孔。
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Results There were 3 types of vessel elements, scalariform vessel, reticulated vessel and pitted vessel, the perforation plates were simple perforation plate.
结果茵陈蒿具有梯纹、网纹和孔纹3种类型的导管，穿孔板类型为单穿孔。
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