255 



from which it may perhaps be concluded that this species does 

 not grow in quite as light localities as does S. nivalis. 



Only specimens from Nova Zembla and Cape Tscheljuskin 

 have been at my disposal; they were precisely similar in structure. 



Fig. 8. Saxifraga hieraciifolia. 



A, Upper epidermis. B, Lower epidermis. C, Upper surface. D, Lower surface (=*^;i). 



Saxifraga stellaris L. 



Saxifraga stellaris L. (Figs. 9 and 10) grows generally at very 

 considerable heights on damp and cold ground, among moss, 

 in clefts of rocks, along streams, in short it is a moisture- 

 loving plant, as is also distinctly indicated by the anatomy of 

 the leaf. 



The leaf has slight and distant teeth and a hydathode at the 

 apex of each tooth (Fig. 9). The epidermis of the upper surface 



17* 



