| I: | Bulliform cells | large, bubble-shaped epidermal cells that occur in groups on the upper surface of the leaves of many monocots. |
| II: | Lenticells | a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the bark of woody stems and roots of dicotyledonous flowering plants |

| A: | more stomata in adaxial epidermis. |
| B: | reticulate venation. |