Cross-section of the epidermis and the mesophyll (constituted by the spongy and palisade parenhyma) stained with Alcian blue-safranin and observed with objective of 4x. We can notice different sections of the vascular bundles (the main and secondary vascular bundles), some in longitudinal section. In the lower epidermis appear some stomatal crypts. Details of the mesophyll and the main bundle are shown at higher magnification in other microphotographies (zones framed in red and blue, respectively)