phloem

It is found that the fiber of phloem of broussonetia is irregular elliptoid at cross section.

同时发现构皮纤的横截面是带有中腔不规则的椭圆形结构，且呈束纤分。

Plenty of laticiferous tubes were included in roots, stems and leaves.Intraxylary phloem formed around the pith.

髓的外围形成一环内生韧皮部，这些结构特征使罗更好的适应干旱、盐碱等恶劣环境。

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

原生中柱的一种类型。木质部是星形的，韧皮部位于星形之间。