xylem

4) Primary xylem is of centrarch maturation;

4)初生木质部发生顺心始式;

The development of xylem is of mesarch.Stomata are monocyclic type.

叶脉、叶柄、上胚轴维管束均外韧型。

The results showed that the primary xylem of the root is diarch, triarch and tetrarchy;

结果表明：根初生木质部型、三型和四型；

Protoxylem The PRIMARY XYLEM elements that are formed from the procambium first.

生木质部：初生木质部成分，最早由形成层形成。

Actinostele A rype of protostele in which the xylem is star shaped and the phloem lies between the points of the star.

星状中柱：生中柱一种类型。木质部是星形，韧皮部位于星形之间。