243 



with 5—7 lobes. Each lobe terminates in a hydathode (Fig. 1 A). 

 Along the margin and upon both surfaces glandular hairs occur, 

 long upon the upper surface and short upon the lower ^(Fig. 2 £'.) 



С 



Fig. 1. Saxifraga cernua. 



л (з/г), Leaf-form. В, Upper epidermis луНЬ a glandular hair. C, Transverse section of 

 leaf. D, Longitudinal section of leaf-apex with hydathode. E, Spongy parenchyma. (5, 



C, D and E M/i). 



The epidermis of the upper surface consists of cells with un- 

 dulating walls (Fig. 1 B), the lateral and outer walls of which are 

 thin (2—3^). Cuticle is very slightly developed. The epidermis of 

 the upper surface is provided with stomata which project above 



