The arrangement of vascular tissue ( the vascular system ) in the stem is very varied , giving a number of different types of stele.
茎中维管组织的排列方式多种多样，由此产生多种类型的中柱。
The arrangement of vascular tissue ( the vascular system ) in the stem is very varied , giving a number of different types of stele.
茎中维管组织的排列方式多种多样，由此产生多种类型的中柱。
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