The haustrum structure of the two were similar and both were composed of parenchyma and spiral vessel.
北桑寄
叶较薄，叶脉发达，无栅栏组
绵组的分化。
The haustrum structure of the two were similar and both were composed of parenchyma and spiral vessel.
北桑寄叶较薄，叶脉发达，无栅栏组绵组的分化。
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