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Fig. 10.6-1. Transverse section of fig leaf (Ficus). The thick band of giant, empty-looking cells is part of a multiple epidermis. There is a layer of cells that appears to be an epidermis, but those cells are only part of the total epidermis; both they and the giant cells are derived from the protoderm. In a uniseriate epidermis, protoderm cells divide with anticlinal walls only, but in a multiseriate epidermis, protoderm cells divide in various planes. In species like this in which the outermost layer looks so much like an epidermis and the inner layers of giant cells look so unlike epidermis developmental studies are necessary to be certain that it is a multiple epidermis and not just a uniseriate epidermis and an unusual hypodermis.

            Several stomata are visible in the lower epidermis (arrows; the middle two stomata are somewhat indistinct); none is present in the upper, multiseriate epidermis.