Complete cross-section of a root that initiates the secondary growth stained with Alcian blue-safranin and observed with the objective of 10x. We can view the cortex and the vascular cylinder. In the cylinder we can distinguish the phloem (yellow) (externally located), showing two bundles of perivascular sclerenchyma fibers, and the xylem (internally located). In between are located the endodermis and the pericycle, visible at higher magnification in other microphotography. The epidermis is missing, since the cells of suberin-deposited walls have been removed