haustrum

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

此外在子叶吸器和其它贮藏物等方面也存在差异。

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

北桑寄生叶较薄，叶脉发达，无栅栏组和海绵组化。