Vascular bundles in the stem of $Cucurbita$ or $Lagenaria$ are

The stele found in monocot stems is known as:

What is the common function of the cortex in plants?

The transverse section of a plant material shows the following anatomical features: $(a)$ the vascular bundles are conjoint,scattered,and surrounded by sclerenchymatous bundle sheaths,$(b)$ phloem parenchyma is absent. What will you identify it as?

Vascular bundles are scattered in:

In which plant are the vascular bundles scattered in the ground tissue,and each vascular bundle is surrounded by a sclerenchymatous bundle sheath?