In addition .there occurred difference in the structure of cotyledonary haustrum and other storages.

此子叶吸器的结构其它贮藏物等方面也差异。

The haustrum structure of the two were similar and both were composed of parenchyma and spiral vessel.

北桑寄生叶较薄，叶脉发达，无栅栏海绵的分化。