cambium

Acropetal differentiation of the cambium layer continues as the primary root elongates.

形成的向顶分化像初根伸长一样在继续进行。

Interfascicular cambium A single layer of actively dividing cells between the vascular bundles in stems.

束间形成是位于茎的管束间的具有旺盛分裂能力的一。

Bark The outermost tissue of the stem and roots in woody plants, on the outside of the phellogen (cork cambium).

本植物中的茎或根中栓形成外方的全部组织，称为树皮。