Microscopic photo of sheet surface Plectranthus amboinicus cell. In the center there are the epidermal cells that surround the stoma. And the stoma itself, consisting of guard cells. Stoma on the photos in closed position. Plectrantus - sukulent, so it needs to retain moisture in the solid shells. The photo shows that the boundary of plectrantus cells are wavy, not flat which increases the interconnection of the cells.