星状中柱
- 网络actinostele
星状中柱-
星状中柱，初生木质部外始式，初生韧皮部呈孤岛状，呈径向辐射状排列位于初生木质部之间，中央形成微弱的髓。
It has Actinostele , primary xylem is exarch , primary phloem located between primary xylems like an island . The pith is shaped in the middle .
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内皮层有凯氏带，星状中柱，初生根二原型。
The Casparian strip is not obvious in the endodermis . It has actinostele , and primary xylem is diarch . The secondary structure of root of A. trifoliata includes periderm and secondary vascular tissue from the outer to the inner .