Figure 7.8. A typical dicot stoma. A. Surface view. B. View in transverse section.
Monocot leaves, besides having parallel veins, usually do not have the mesophyll differentiated into palisade and spongy layers. Some monocot leaves (e.g., those of grasses) have large, thin-walled bulliform cells on either side of the main central vein (midrib) toward the upper surface (Fig. 7.10). Under dry conditions, the bulliform cells partly collapse, causing the leaf blade to fold or roll; the folding or rolling reduces transpiration (see also Fig. 11.19).
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Acai, Maqui And Many Other Popular Berries That Will Change Your Life And Health. Berries have been demonstrated to be some of the healthiest foods on the planet. Each month or so it seems fresh research is being brought out and new berries are being exposed and analyzed for their health giving attributes.