外韧维管束
- 网络collateral vascular bundle;collateral bundle
外韧维管束-
根状茎横切面显示表皮无气孔器，皮层具裂生通气组织，有内皮层，中柱具六个外韧维管束，髓部发达，薄壁细胞内含大量淀粉体和造油体。
Shows that : Stoma is absent in the epidermis , schizogenous aerenchyma exist in cortex . Inside the endodermis , six collateral bundles lie in the vascular cylinder , pith tissue is developed and abundant amyloid and oleoplast accumulated in its parenchyma cells .
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茎中有限外韧型维管束和油室数目不同，每种柴胡的维管束与油室数目相等，北柴胡为16个，南胡多为28～31个，少为16个。
The number of collateral vascular bundle and oil room are different , the North-Chaihu is 16 , The South-Chaihu is 28 to 31 , the least is 16 .