270 



The cells of the mesophyll (Fig. 19) are not markedly diffe- 

 rentiated; the palisade-cells are obliquely placed. The cells of the 

 spongy parenchyma are roundish. The whole leaf is somewhat suc- 



Fig. 19. Saxifraga flagellaris. 



The leaf: A (2/i), Leaf-form. B, Lower epidermis. C, Marginal hairs. B, Longitudinal 



section. E, Spongy parenchyma. F, Transverse section. (S, C, F s^/i), (D, E м /i). 



