Stomata in the leaf blade of Dyckia brevifolia Baker. ((a) and (b)) Transverse-longitudinal sections with detail of the stomatal structure in individual epidermis depressions between sclereid groups, as shown in light microscopy. (c) Cross section in light microscopy, which shows guard cells (Gc), subsidiary cells (Suc), and substomatal chamber (SC). (d) Stomata frontal view (St) depth in the epidermis and trichomes (Tr), showing part of the shield, as observed in scanning electron microscopy. (e) Frontal view of the subsidiary cells (Sc) of the stomata, as observed in light microscopy. (Lsc = lateral subsidiary cell; Tsc = terminal subsidiary cell).