DENDROLOGY

Detailed explanation-1: -In dicot stems, the vascular bundles are arranged in a ring. Like dicot roots, dicot stems are protected by an outer layer of dermal tissue called the epidermis. Then, also similar to dicot roots, dicot stems have a layer of ground tissue called the cortex beneath the epidermis.

Detailed explanation-2: -There are 2 to 6 vascular bundles in the dicot root.

Detailed explanation-3: -The vascular cambium in dicot stem is partly primary and partly secondary in origin. The intrafascicular cambium present inside the vascular bundle in the dicot stem is primary in origin while the interfascicular cambium formed from the cells of medullary rays is secondary in origin.