stomata occur on the upper surface adjacent to veins. Stomata are usually confined to
areas between veins but a few of them occur over the vein areas in C. stvlosus, Euonvmus
japonicus and E. pendulus. Anticlinal walls of epidermal cells on both sides of leaves are
smuous in Celastrus stvlosus (Fig. ib and g), but they are straight or slightly arched
(Fig. ia, c-f and h-j) in all other species. Fach cell wall in the cuticle of Euonvmus
pendulus is clearly marked by three lines representing the two secondary walls on either
side of the middle lamella (Plate 12, No. 5). The outer wall of the epidermal cells in this
species is heavily cutinized and sectional views of leaves show peculiar canal-like pits
in the surface wall of each cell (Plate 12, No. 3). The pits extend up to the inner face