据此，芦荟叶维管束内的大型薄壁细胞的来源与韧皮部相同，属于特化的韧皮部薄壁组织细胞。

So the aloin cells were special phloem parenchyma cells because they Shared the same origin with the other phloem cells.

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初生木质部与初生韧皮部之间可见到2—3层排列规则或不规则的薄壁组织细胞，但是没有维管形成层的发生。

Between primary xylem and primary phloem there are 2-3 layers of parenchymatous cells, regularly or irregularly arranged, but no cambial zone can be recognized.

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