Internodes of the mutants had abnormal-shaped epidermal and hypodermal cells and showed an unusual arrangement of small vascular bundles.

突变体节间的表皮细胞和下皮细胞形态异常，而且小的维管束排列也与野生型不一样。

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There were 3 big vascular bundles and 5~7 small vascular bundles in young stem, and there were 2~3 small vascular bundles between two big vascular bundles, they were all arranged in circularity.

茎的初生维管束中有3大束和5～7小束，两个大维管束之间夹有2～3个小维管束，所有维管束在茎的横切面上呈环状排列；

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