The pith of this stemlike stele appears rather strongly like collenchyma tissue.

茎的髓得颇强健，像厚角组织。

Collateral or bicollateral vascular bundle, developmental pith and medullary ray are obvious.

髓部发达，髓射线明。

Ground meristem The central region of the apical meristem from which the ground tissues of pith, cortex, medullary rays, and mesophyll differentiate. In root meristem it is also called periblem.

位于顶端分生组织的部，髓、皮层、髓射线以及叶基本组织均是由基本分生组织分化而成。根部分生组织也称为皮层原。