stomata

The stomata are surrounded by a special layer of cubical and granular cells.

These small cells look very like the smaller stomata of endothelial membranes, but are shewn to be cells by possessing a nucleus.

See Francis Darwin, on the relation between "bloom" on leaves and the distribution of the stomata.

At intervals along the surface of the epicarp are stomata, or breathing pores, surrounded by guard cells.

The under side of the leaf contains hundreds of little pores or mouths called stomata.