Microphotography of the stem observed with the objective of 10x. We can notice the epidermis, the cortex (containing some secretory conduits), part of the vascular cylinder (showing two vascular bundles in which are seen the xylem and the phloem), and a zone of sclerenchyma fibers. Towards the interior of the stem is placed the medullar parenchyma. Details of a vascular bundle are offered at higher magnification in other microphotography (zone framed in red)