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

间是位于茎的间的具有旺盛分裂能力的一细胞。

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

的向顶分化像初生根伸长一样在继续进行。

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

木本植物中的茎或根中木栓外方的全部组织，称为树皮。