Cross section in a petiole of tobacco
The section is a paraffin stained with astra blue – fuchsin basic. The first micrograph illustrates the vascular tissues arranged in an arc in central position (fc: vascular bundle) with ground tissue, parenchyma, all around.
Below: two micrographs with detail of protection tissue, the uniseriate epidermis covered with many glandular trichomes.
Detail of vascular tissues: xylem (x) towards the center and phloem (p) towards the periphery.