Foliar Venation — Pray 
9 
ground meristem does not have the degree of the general rectangular nature of the ultimate 
precise parallel subdivision described in the areoles is related to the tendency for veins 
foregoing ontogenetic series. However, the and intervening panels of mesophyll to be 
right-angled intersection of most veins and derived from rectangular initials. The appar- 
Figures 8-13 
