256 



Im^'. 10 .1 Jind ß] has iindulalinj,' walls wliicli are lliiii everywhere. 

 Tlie outer walls are also thin, and have a distinct cuticle. 

 Slomata are numerous, unilurndy dislrihuled, and |)roniinenl. 



Fig. 9. Saxifraga stellaris. 



A (2/i), Leaf-form. B, Epidermis of the upper surface of the leaf. C, Transverse section 

 of leaf. D, Longitudinal section of leaf. E, Spongy parenchyma. {B, C, D and E ^'ji). 



Glandular hairs occur scattered over the whole leaf-blade; a 



definite head is wanting to some of the marginal hairs (P'ig. 9). 



The epidermis of the lower surface (Fig. 10 C and D) closely 



