Page 52 – Leaf hypodermis
Fig. 45 . Leaf hypodermis. Sections of the ridge on the abaxial side (A), and of the adaxial side (B) of the basal portion of fully developed leaves to show the cells of the first hypodermal layer (as seen in section parallel to the surface). A represents the more usual type of cell end (or transverse) wall, i.e., truncate (at a), or oblique, i.e., tapering (at b), and, in B, the peculiar broadening at the ends of the cells. The cell walls have started to thicken and pits are present. X400.