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

此外在子叶结构和其它贮藏物等方面也在差异。

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，栅栏组织和海绵组织分化。