286 



lioned, the paris of tlie leaf wliicli are exposed lo the light 

 possess a spon}:y parenchyma developed in the form of 

 palisade. 



Fig. 28. Saxifraga oppositifolia. 

 The leaf: A {■.), Leaf-form. B, Marginal hairs. C, Longitudinal section. A Transverse 

 Bection. E, Spongy parenchyma. F, Spongy parenchyma from the leaf-stalk. {B, C. U, 



E, F 6"/j). 



